URL https://opencores.org/ocsvn/apbi2c/apbi2c/trunk
Subversion Repositories apbi2c

[/] [apbi2c/] [trunk/] [rtl/] [module_i2c.v] - Blame information for rev 11

Go to most recent revision | Details | Compare with Previous | View Log

//////////////////////////////////////////////////////////////////
////
////
////    TOP I2C BLOCK to I2C Core
////
////
////
//// This file is part of the APB to I2C project
////
//// http://www.opencores.org/cores/apbi2c/
////
////
////
//// Description
////
//// Implementation of APB IP core according to
////
//// apbi2c_spec IP core specification document.
////
////
////
//// To Do: Things are right here but always all block can suffer changes
////
////
////
////
////
//// Author(s): - Felipe Fernandes Da Costa, fefe2560@gmail.com
////              Ronal Dario Celaya ,rcelaya.dario@gmail.com
////
///////////////////////////////////////////////////////////////// 
////
////
//// Copyright (C) 2009 Authors and OPENCORES.ORG
////
////
////
//// This source file may be used and distributed without
////
//// restriction provided that this copyright statement is not
////
//// removed from the file and that any derivative work contains
//// the original copyright notice and the associated disclaimer.
////
////
//// This source file is free software; you can redistribute it
////
//// and/or modify it under the terms of the GNU Lesser General
////
//// Public License as published by the Free Software Foundation;
//// either version 2.1 of the License, or (at your option) any
////
//// later version.
////
////
////
//// This source is distributed in the hope that it will be
////
//// useful, but WITHOUT ANY WARRANTY; without even the implied
////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
////
//// PURPOSE. See the GNU Lesser General Public License for more
//// details.
////
////
////
//// You should have received a copy of the GNU Lesser General
////
//// Public License along with this source; if not, download it
////
//// from http://www.opencores.org/lgpl.shtml
////
////
///////////////////////////////////////////////////////////////////
 
 
`timescale 1ns/1ps //timescale 
 
module module_i2c#(
                        //THIS IS USED ONLY LIKE PARAMETER TO BEM CONFIGURABLE
                        parameter integer DWIDTH = 32,
                        parameter integer AWIDTH = 14
                )
                (
                //I2C INTERFACE WITH ANOTHER BLOCKS
                 input PCLK,
                 input PRESETn,
 
                //INTERFACE WITH FIFO TRANSMISSION
                 input fifo_tx_f_full,
                 input fifo_tx_f_empty,
                 input [DWIDTH-1:0] fifo_tx_data_out,
 
                //INTERFACE WITH FIFO RECEIVER
                 input fifo_rx_f_full,
                 input fifo_rx_f_empty,
                 output reg fifo_rx_wr_en,
                 output reg [DWIDTH-1:0] fifo_rx_data_in,
 
                //INTERFACE WITH REGISTER CONFIGURATION
                 input [AWIDTH-1:0] DATA_CONFIG_REG,
 
                //INTERFACE TO APB AND READ FOR FIFO TX
                 output reg fifo_tx_rd_en,
                 output TX_EMPTY,
                 output RX_EMPTY,
                 output ERROR,
 
                //I2C BI DIRETIONAL PORTS
                inout SDA,
                inout SCL
 
 
                 );
 
//THIS IS USED TO GENERATE INTERRUPTIONS
assign TX_EMPTY = (fifo_tx_f_empty == 1'b1)? 1'b1:1'b0;
assign RX_EMPTY = (fifo_rx_f_empty == 1'b1)? 1'b1:1'b0;
 
        //THIS COUNT IS USED TO CONTROL DATA ACCROSS FSM        
        reg [1:0] count_tx;
        //CONTROL CLOCK AND COUNTER
        reg [11:0] count_send_data;
        reg BR_CLK_O;
        reg SDA_OUT;
 
        //RESPONSE USED TO HOLD SIGNAL TO ACK OR NACK
        reg RESPONSE;
 
// TX PARAMETERS USED TO STATE MACHINE
 
localparam [5:0] TX_IDLE = 6'd0, //IDLE
 
           TX_START = 6'd1,//START BIT
 
           TX_CONTROLIN_1 = 6'd2, //START BYTE
           TX_CONTROLIN_2 = 6'd3,
           TX_CONTROLIN_3 = 6'd4,
           TX_CONTROLIN_4 = 6'd5,
           TX_CONTROLIN_5 = 6'd6,
           TX_CONTROLIN_6 = 6'd7,
           TX_CONTROLIN_7 = 6'd8,
           TX_CONTROLIN_8 = 6'd9, //END FIRST BYTE
 
           TX_RESPONSE_CIN =6'd10, //RESPONSE
 
           TX_ADRESS_1 = 6'd11,//START BYTE
           TX_ADRESS_2 = 6'd12,
           TX_ADRESS_3 = 6'd13,
           TX_ADRESS_4 = 6'd14,
           TX_ADRESS_5 = 6'd15,
           TX_ADRESS_6 = 6'd16,
           TX_ADRESS_7 = 6'd17,
           TX_ADRESS_8 = 6'd18,//END FIRST BYTE
 
           TX_RESPONSE_ADRESS =6'd19, //RESPONSE
 
           TX_DATA0_1 = 6'd20,//START BYTE
           TX_DATA0_2 = 6'd21,
           TX_DATA0_3 = 6'd22,
           TX_DATA0_4 = 6'd23,
           TX_DATA0_5 = 6'd24,
           TX_DATA0_6 = 6'd25,
           TX_DATA0_7 = 6'd26,
           TX_DATA0_8 = 6'd27,//END FIRST BYTE
 
           TX_RESPONSE_DATA0_1 = 6'd28,  //RESPONSE
 
           TX_DATA1_1 = 6'd29,//START BYTE
           TX_DATA1_2 = 6'd30,
           TX_DATA1_3 = 6'd31,
           TX_DATA1_4 = 6'd32,
           TX_DATA1_5 = 6'd33,
           TX_DATA1_6 = 6'd34,
           TX_DATA1_7 = 6'd35,
           TX_DATA1_8 = 6'd36,//END FIRST BYTE
 
           TX_RESPONSE_DATA1_1 = 6'd37,//RESPONSE
 
           TX_DELAY_BYTES = 6'd38,//USED ONLY IN ACK TO DELAY BETWEEN
           TX_NACK = 6'd39,//USED ONLY IN ACK TO DELAY BETWEEN BYTES
           TX_STOP = 6'd40;//USED TO SEND STOP BIT
 
        //STATE CONTROL 
        reg [5:0] state_tx;
        reg [5:0] next_state_tx;
 
//ASSIGN REGISTERS TO BIDIRETIONAL PORTS
assign SDA = (DATA_CONFIG_REG[0] == 1'b1 & DATA_CONFIG_REG[1] == 1'b0)?SDA_OUT:1'b0;
assign SCL = (DATA_CONFIG_REG[0] == 1'b1 & DATA_CONFIG_REG[1] == 1'b0)?BR_CLK_O:1'b0;
 
//STANDARD ERROR
assign ERROR = (DATA_CONFIG_REG[0] == 1'b1 & DATA_CONFIG_REG[1] == 1'b1)?1'b1:1'b0;
 
//COMBINATIONAL BLOCK TO TX
always@(*)
begin
 
        //THE FUN START HERE :-)
        //COMBINATIONAL UPDATE STATE BE CAREFUL WITH WHAT YOU MAKE HERE
        next_state_tx = state_tx;
 
        case(state_tx)//STATE_TX IS MORE SECURE CHANGE ONLY IF YOU KNOW WHAT ARE YOU DOING 
        TX_IDLE:
        begin
                //OBEYING SPEC
                if(DATA_CONFIG_REG[0] == 1'b0 && fifo_tx_f_full == 1'b0 && DATA_CONFIG_REG[1] == 1'b0)
                begin
                        next_state_tx = TX_IDLE;
                end
                else if(DATA_CONFIG_REG[0] == 1'b1 && fifo_tx_f_full == 1'b1 && DATA_CONFIG_REG[1] == 1'b1)
                begin
                        next_state_tx = TX_IDLE;
                end
                else if(DATA_CONFIG_REG[0] == 1'b1 && fifo_tx_f_full == 1'b1 && DATA_CONFIG_REG[1] == 1'b0)
                begin
                        next_state_tx = TX_START;
                end
 
 
        end
        TX_START://THIS IS USED TOO ALL STATE MACHINES THE COUNTER_SEND_DATA
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_START;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_1;
                end
 
        end
        TX_CONTROLIN_1:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_1;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_2;
                end
 
        end
        TX_CONTROLIN_2:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx =TX_CONTROLIN_2;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_3;
                end
 
        end
        TX_CONTROLIN_3:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_3;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_4;
                end
        end
        TX_CONTROLIN_4:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_4;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_5;
                end
        end
        TX_CONTROLIN_5:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_5;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_6;
                end
        end
        TX_CONTROLIN_6:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_6;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_7;
                end
        end
        TX_CONTROLIN_7:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_7;
                end
                else
                begin
                        next_state_tx = TX_CONTROLIN_8;
                end
        end
        TX_CONTROLIN_8:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_CONTROLIN_8;
                end
                else
                begin
                        next_state_tx = TX_RESPONSE_CIN;
                end
        end
        TX_RESPONSE_CIN:
        begin
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_RESPONSE_CIN;
                end
                else if(RESPONSE == 1'b0)//ACK
                begin
                        next_state_tx = TX_DELAY_BYTES;
                end
                else if(RESPONSE == 1'b1)//NACK
                begin
                        next_state_tx = TX_NACK;
                end
 
        end
 
        //NOW SENDING ADDRESS
        TX_ADRESS_1:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_1;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_2;
                end
        end
        TX_ADRESS_2:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_2;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_3;
                end
        end
        TX_ADRESS_3:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_3;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_4;
                end
        end
        TX_ADRESS_4:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_4;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_5;
                end
        end
        TX_ADRESS_5:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_5;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_6;
                end
        end
        TX_ADRESS_6:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_6;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_7;
                end
        end
        TX_ADRESS_7:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_7;
                end
                else
                begin
                        next_state_tx = TX_ADRESS_8;
                end
        end
        TX_ADRESS_8:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_ADRESS_8;
                end
                else
                begin
                        next_state_tx = TX_RESPONSE_ADRESS;
                end
        end
        TX_RESPONSE_ADRESS:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_RESPONSE_ADRESS;
                end
                else if(RESPONSE == 1'b0)//ACK
                begin
                        next_state_tx = TX_DELAY_BYTES;
                end
                else if(RESPONSE == 1'b1)//NACK --> RESTART CONDITION AND BACK TO START BYTE AGAIN
                begin
                        next_state_tx = TX_NACK;
                end
        end
 
        //data in
        TX_DATA0_1:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_1;
                end
                else
                begin
                        next_state_tx = TX_DATA0_2;
                end
        end
        TX_DATA0_2:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_2;
                end
                else
                begin
                        next_state_tx = TX_DATA0_3;
                end
        end
        TX_DATA0_3:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_3;
                end
                else
                begin
                        next_state_tx = TX_DATA0_4;
                end
        end
        TX_DATA0_4:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_4;
                end
                else
                begin
                        next_state_tx = TX_DATA0_5;
                end
        end
        TX_DATA0_5:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_5;
                end
                else
                begin
                        next_state_tx = TX_DATA0_6;
                end
        end
        TX_DATA0_6:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_6;
                end
                else
                begin
                        next_state_tx = TX_DATA0_7;
                end
        end
        TX_DATA0_7:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_7;
                end
                else
                begin
                        next_state_tx = TX_DATA0_8;
                end
        end
        TX_DATA0_8:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA0_8;
                end
                else
                begin
                        next_state_tx = TX_RESPONSE_DATA0_1;
                end
        end
        TX_RESPONSE_DATA0_1:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_RESPONSE_DATA0_1;
                end
                else if(RESPONSE == 1'b0)//ACK
                begin
                        next_state_tx = TX_DELAY_BYTES;
                end
                else if(RESPONSE == 1'b1)//NACK
                begin
                        next_state_tx = TX_NACK;
                end
        end
 
        //second byte
        TX_DATA1_1:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_1;
                end
                else
                begin
                        next_state_tx = TX_DATA1_2;
                end
        end
        TX_DATA1_2:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_2;
                end
                else
                begin
                        next_state_tx = TX_DATA1_3;
                end
        end
        TX_DATA1_3:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_3;
                end
                else
                begin
                        next_state_tx = TX_DATA1_4;
                end
        end
        TX_DATA1_4:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_4;
                end
                else
                begin
                        next_state_tx = TX_DATA1_5;
                end
        end
        TX_DATA1_5:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_5;
                end
                else
                begin
                        next_state_tx = TX_DATA1_6;
                end
        end
        TX_DATA1_6:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_6;
                end
                else
                begin
                        next_state_tx = TX_DATA1_7;
                end
        end
        TX_DATA1_7:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_7;
                end
                else
                begin
                        next_state_tx = TX_DATA1_8;
                end
        end
        TX_DATA1_8:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DATA1_8;
                end
                else
                begin
                        next_state_tx = TX_RESPONSE_DATA1_1;
                end
        end
        TX_RESPONSE_DATA1_1:
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_RESPONSE_DATA1_1;
                end
                else if(RESPONSE == 1'b0)//ACK
                begin
                        next_state_tx = TX_DELAY_BYTES;
                end
                else if(RESPONSE == 1'b1)//NACK
                begin
                        next_state_tx = TX_NACK;
                end
        end
        TX_DELAY_BYTES://THIS FORM WORKS 
        begin
 
 
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_DELAY_BYTES;
                end
                else
                begin
 
                        if(count_tx == 2'd0)
                        begin
                                next_state_tx = TX_ADRESS_1;
                        end
                        else if(count_tx == 2'd1)
                        begin
                                next_state_tx = TX_DATA0_1;
                        end
                        else if(count_tx == 2'd2)
                        begin
                                next_state_tx = TX_DATA1_1;
                        end
                        else if(count_tx == 2'd3)
                        begin
                                next_state_tx = TX_STOP;
                        end
 
                end
 
        end
        TX_NACK://NOT TESTED YET !!!!
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2]*2'd2)
                begin
                        next_state_tx = TX_NACK;
                end
                else
                begin
                        if(count_tx == 2'd0)
                        begin
                                next_state_tx = TX_CONTROLIN_1;
                        end
                        else if(count_tx == 2'd1)
                        begin
                                next_state_tx = TX_ADRESS_1;
                        end
                        else if(count_tx == 2'd2)
                        begin
                                next_state_tx = TX_DATA0_1;
                        end
                        else if(count_tx == 2'd3)
                        begin
                                next_state_tx = TX_DATA1_1;
                        end
                end
        end
        TX_STOP://THIS WORK
        begin
                if(count_send_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_tx = TX_STOP;
                end
                else
                begin
                        next_state_tx = TX_IDLE;
                end
        end
        default:
        begin
                next_state_tx = TX_IDLE;
        end
        endcase
 
 
end
//SEQUENTIAL TX
always@(posedge PCLK)
begin
 
        //RESET SYNC
        if(!PRESETn)
        begin
                //SIGNALS MUST BE RESETED
                count_send_data <= 12'd0;
                state_tx <= TX_IDLE;
                SDA_OUT<= 1'b1;
                fifo_tx_rd_en <= 1'b0;
                count_tx <= 2'd0;
                BR_CLK_O <= 1'b1;
                RESPONSE<= 1'b0;
        end
        else
        begin
 
                // SEQUENTIAL FUN START
                state_tx <= next_state_tx;
 
                case(state_tx)
                TX_IDLE:
                begin
 
                        fifo_tx_rd_en <= 1'b0;
 
 
                        if(DATA_CONFIG_REG[0] == 1'b0 && fifo_tx_f_full == 1'b0 && DATA_CONFIG_REG[1] == 1'b0)
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<= 1'b1;
                                BR_CLK_O <= 1'b1;
                        end
                        else if(DATA_CONFIG_REG[0] == 1'b1 && fifo_tx_f_full == 1'b1 && DATA_CONFIG_REG[1] == 1'b0)
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=1'b0;
                        end
                        else if(DATA_CONFIG_REG[0] == 1'b1 && fifo_tx_f_full == 1'b1 && DATA_CONFIG_REG[1] == 1'b1)
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<= 1'b1;
                                BR_CLK_O <= 1'b1;
                        end
 
                end
                TX_START:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                BR_CLK_O <= 1'b0;
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
                        if(count_send_data == DATA_CONFIG_REG[13:2]- 12'd1)
                        begin
                                SDA_OUT<=fifo_tx_data_out[0:0];
                                count_tx <= 2'd0;
                        end
 
                end
                TX_CONTROLIN_1:
                begin
 
 
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
 
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[0:0];
 
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[1:1];
                        end
 
 
                end
 
                TX_CONTROLIN_2:
                begin
 
 
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[1:1];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[2:2];
                        end
 
                end
 
                TX_CONTROLIN_3:
                begin
 
 
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[2:2];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[3:3];
                        end
 
 
 
                end
                TX_CONTROLIN_4:
                begin
 
 
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[3:3];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[4:4];
                        end
 
                end
 
                TX_CONTROLIN_5:
                begin
 
 
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[4:4];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[5:5];
                        end
 
                end
 
 
                TX_CONTROLIN_6:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[5:5];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[6:6];
                        end
 
 
                end
 
                TX_CONTROLIN_7:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[6:6];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[7:7];
                        end
 
 
                end
                TX_CONTROLIN_8:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[7:7];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<= 1'b0;
                        end
 
 
                end
                TX_RESPONSE_CIN:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
 
                                //LETS TRY USE THIS BUT I DONT THINK IF WORKS  
                                RESPONSE<= SDA;
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
 
                end
                TX_ADRESS_1:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[8:8];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[9:9];
                        end
 
                end
                TX_ADRESS_2:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[9:9];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[10:10];
                        end
 
                end
                TX_ADRESS_3:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[10:10];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[11:11];
                        end
 
                end
                TX_ADRESS_4:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[11:11];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[12:12];
                        end
                end
                TX_ADRESS_5:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[12:12];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[13:13];
                        end
 
 
                end
                TX_ADRESS_6:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[13:13];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[14:14];
                        end
 
                end
                TX_ADRESS_7:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[14:14];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[15:15];
                        end
 
 
                end
                TX_ADRESS_8:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[15:15];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
                end
                TX_RESPONSE_ADRESS:
                begin
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
 
                                //LETS TRY USE THIS BUT I DONT THINK IF WORKS  
                                RESPONSE<= SDA;
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
                end
                TX_DATA0_1:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[16:16];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[17:17];
                        end
 
 
                end
                TX_DATA0_2:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[17:17];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[18:18];
                        end
 
 
                end
                TX_DATA0_3:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[18:18];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[19:19];
                        end
 
                end
                TX_DATA0_4:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[19:19];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[20:20];
                        end
 
                end
                TX_DATA0_5:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[20:20];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[21:21];
                        end
 
                end
                TX_DATA0_6:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[21:21];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[22:22];
                        end
 
                end
                TX_DATA0_7:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[22:22];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[23:23];
                        end
 
                end
                TX_DATA0_8:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[23:23];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
                end
                TX_RESPONSE_DATA0_1:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
 
                                //LETS TRY USE THIS BUT I DONT THINK IF WORKS  
                                RESPONSE<= SDA;
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
                end
                TX_DATA1_1:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[24:24];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[25:25];
 
                        end
 
 
                end
                TX_DATA1_2:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[25:25];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[26:26];
                        end
 
                end
                TX_DATA1_3:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[26:26];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[27:27];
                        end
 
                end
                TX_DATA1_4:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[27:27];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[28:28];
                        end
 
                end
                TX_DATA1_5:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[28:28];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[29:29];
                        end
 
                end
                TX_DATA1_6:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[29:29];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[30:30];
                        end
 
                end
                TX_DATA1_7:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[30:30];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                SDA_OUT<=fifo_tx_data_out[31:31];
                        end
 
 
                end
                TX_DATA1_8:
                begin
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
                                SDA_OUT<=fifo_tx_data_out[31:31];
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
 
                end
                TX_RESPONSE_DATA1_1:
                begin
                        //fifo_tx_rd_en <= 1'b1;
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
 
                                //LETS TRY USE THIS BUT I DONT THINK IF WORKS  
                                RESPONSE<= SDA;
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd4)
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data >= DATA_CONFIG_REG[13:2]/12'd4 && count_send_data < (DATA_CONFIG_REG[13:2]-(DATA_CONFIG_REG[13:2]/12'd4))-12'd1)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                                fifo_tx_rd_en <= 1'b1;
                        end
 
                end
                TX_DELAY_BYTES:
                begin
 
                        fifo_tx_rd_en <= 1'b0;
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
 
                                count_send_data <= count_send_data + 12'd1;
                                BR_CLK_O <= 1'b0;
                                SDA_OUT<=1'b0;
                        end
                        else
                        begin
 
 
                                if(count_tx == 2'd0)
                                begin
                                        count_tx <= count_tx + 2'd1;
                                        SDA_OUT<=fifo_tx_data_out[8:8];
                                end
                                else if(count_tx == 2'd1)
                                begin
                                        count_tx <= count_tx + 2'd1;
                                        SDA_OUT<=fifo_tx_data_out[16:16];
                                end
                                else if(count_tx == 2'd2)
                                begin
                                        count_tx <= count_tx + 2'd1;
                                        SDA_OUT<=fifo_tx_data_out[24:24];
                                end
                                else if(count_tx == 2'd3)
                                begin
                                        count_tx <= 2'd0;
                                end
 
                                count_send_data <= 12'd0;
 
                        end
 
                end
                //THIS BLOCK MUST BE CHECKED WITH CARE
                TX_NACK:// MORE A RESTART 
                begin
                        fifo_tx_rd_en <= 1'b0;
 
                        if(count_send_data < DATA_CONFIG_REG[13:2]*2'd2)
                        begin
                                count_send_data <= count_send_data + 12'd1;
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd2)
                                begin
                                        SDA_OUT<=1'b0;
                                end
                                else if(count_send_data > DATA_CONFIG_REG[13:2]/12'd2-12'd1 && count_send_data < DATA_CONFIG_REG[13:2])
                                begin
                                        SDA_OUT<=1'b1;
                                end
                                else if(count_send_data  == DATA_CONFIG_REG[13:2]*2'd2)
                                begin
                                        SDA_OUT<=1'b0;
                                end
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd2)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
                                else if(count_send_data > DATA_CONFIG_REG[13:2]/12'd2-12'd1 && count_send_data < DATA_CONFIG_REG[13:2])
                                begin
                                        BR_CLK_O <= 1'b0;
                                end
                                else if(count_send_data < DATA_CONFIG_REG[13:2]*2'd2)
                                begin
                                        BR_CLK_O <= 1'b1;
                                end
 
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
 
                                if(count_tx == 2'd0)
                                begin
                                        count_tx <= 2'd0;
                                        SDA_OUT<=fifo_tx_data_out[0:0];
                                end
                                else if(count_tx == 2'd1)
                                begin
                                        count_tx <= 2'd1;
                                        SDA_OUT<=fifo_tx_data_out[8:8];
                                end
                                else if(count_tx == 2'd2)
                                begin
                                        count_tx <= 2'd2;
                                        SDA_OUT<=fifo_tx_data_out[16:16];
                                end
                                else if(count_tx == 2'd3)
                                begin
                                        count_tx <= 2'd3;
                                        SDA_OUT<=fifo_tx_data_out[24:24];
                                end
 
 
                        end
                end
                TX_STOP:
                begin
 
                        BR_CLK_O <= 1'b1;
 
                        if(count_send_data < DATA_CONFIG_REG[13:2])
                        begin
                                count_send_data <= count_send_data + 12'd1;
 
                                if(count_send_data < DATA_CONFIG_REG[13:2]/12'd2-12'd2)
                                begin
                                        SDA_OUT<=1'b0;
                                end
                                else if(count_send_data > DATA_CONFIG_REG[13:2]/12'd2-12'd1 && count_send_data < DATA_CONFIG_REG[13:2])
                                begin
                                        SDA_OUT<=1'b1;
                                end
                        end
                        else
                        begin
                                count_send_data <= 12'd0;
                        end
                end
                default:
                begin
                        fifo_tx_rd_en <= 1'b0;
                        count_send_data <= 12'd4095;
                end
                endcase
 
        end
 
 
end
 
 
// RX PARAMETERS USED TO STATE MACHINE
 
localparam [5:0] RX_IDLE = 6'd0, //IDLE
 
           RX_START = 6'd1,//START BIT
 
           RX_CONTROLIN_1 = 6'd2, //START BYTE
           RX_CONTROLIN_2 = 6'd3,
           RX_CONTROLIN_3 = 6'd4,
           RX_CONTROLIN_4 = 6'd5,
           RX_CONTROLIN_5 = 6'd6,
           RX_CONTROLIN_6 = 6'd7,
           RX_CONTROLIN_7 = 6'd8,
           RX_CONTROLIN_8 = 6'd9, //END FIRST BYTE
 
           RX_RESPONSE_CIN =6'd10, //RESPONSE
 
           RX_ADRESS_1 = 6'd11,//START BYTE
           RX_ADRESS_2 = 6'd12,
           RX_ADRESS_3 = 6'd13,
           RX_ADRESS_4 = 6'd14,
           RX_ADRESS_5 = 6'd15,
           RX_ADRESS_6 = 6'd16,
           RX_ADRESS_7 = 6'd17,
           RX_ADRESS_8 = 6'd18,//END FIRST BYTE
 
           RX_RESPONSE_ADRESS =6'd19, //RESPONSE
 
           RX_DATA0_1 = 6'd20,//START BYTE
           RX_DATA0_2 = 6'd21,
           RX_DATA0_3 = 6'd22,
           RX_DATA0_4 = 6'd23,
           RX_DATA0_5 = 6'd24,
           RX_DATA0_6 = 6'd25,
           RX_DATA0_7 = 6'd26,
           RX_DATA0_8 = 6'd27,//END FIRST BYTE
 
           RX_RESPONSE_DATA0_1 = 6'd28,  //RESPONSE
 
           RX_DATA1_1 = 6'd29,//START BYTE
           RX_DATA1_2 = 6'd30,
           RX_DATA1_3 = 6'd31,
           RX_DATA1_4 = 6'd32,
           RX_DATA1_5 = 6'd33,
           RX_DATA1_6 = 6'd34,
           RX_DATA1_7 = 6'd35,
           RX_DATA1_8 = 6'd36,//END FIRST BYTE
 
           RX_RESPONSE_DATA1_1 = 6'd37,//RESPONSE
 
           RX_DELAY_BYTES = 6'd38,//USED ONLY IN ACK TO DELAY BETWEEN
           RX_NACK = 6'd39,//USED ONLY IN ACK TO DELAY BETWEEN BYTES
           RX_STOP = 6'd40;//USED TO SEND STOP BIT
 
        //STATE CONTROL 
        reg [5:0] state_rx;
        reg [5:0] next_state_rx;
 
        reg [11:0] count_receive_data;
 
        reg [1:0] count_rx;
 
//COMBINATIONAL BLOCK RX
 
always@(*)
begin
 
 
        next_state_rx = state_rx;
 
        case(state_rx)//STATE_RX IS MORE SECURE CHANGE ONLY IF YOU KNOW WHAT ARE YOU DOING 
        RX_IDLE:
        begin
                //OBEYING SPEC
                if(DATA_CONFIG_REG[1] == 1'b0 && DATA_CONFIG_REG[0] == 1'b0)
                begin
                        next_state_rx = RX_IDLE;
                end
                else if(DATA_CONFIG_REG[1] == 1'b1 && DATA_CONFIG_REG[0] == 1'b1)
                begin
                        next_state_rx = RX_IDLE;
                end
                else if(DATA_CONFIG_REG[1] == 1'b1 && DATA_CONFIG_REG[0] == 1'b0 && SDA == 1'b0 && SCL == 1'b1)
                begin
                        next_state_rx = RX_START;
                end
        end
        RX_START:
        begin
 
                if(SDA == 1'b0 && SCL == 1'b1)
                begin
                        if(count_receive_data != DATA_CONFIG_REG[13:2])
                        begin
                                next_state_rx = RX_START;
                        end
                        else
                        begin
                                next_state_rx = RX_CONTROLIN_1;
                        end
                end
                else
                begin
                        next_state_rx = RX_IDLE;
                end
        end
        RX_CONTROLIN_1:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_1;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_2;
                end
        end
        RX_CONTROLIN_2:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_2;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_3;
                end
        end
        RX_CONTROLIN_3:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_3;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_4;
                end
        end
        RX_CONTROLIN_4:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_4;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_5;
                end
        end
        RX_CONTROLIN_5:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_5;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_6;
                end
        end
        RX_CONTROLIN_6:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_6;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_7;
                end
        end
        RX_CONTROLIN_7:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_7;
                end
                else
                begin
                        next_state_rx = RX_CONTROLIN_8;
                end
        end
        RX_CONTROLIN_8:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_8;
                end
                else
                begin
                        next_state_rx = RX_RESPONSE_CIN;
                end
        end
        RX_RESPONSE_CIN:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_CONTROLIN_8;
                end
                else
                begin
                        next_state_rx = RX_RESPONSE_CIN;
                end
        end
 
        RX_ADRESS_1:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_1;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_2;
                end
        end
        RX_ADRESS_2:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_2;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_3;
                end
        end
        RX_ADRESS_3:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_3;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_4;
                end
        end
        RX_ADRESS_4:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_4;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_5;
                end
        end
        RX_ADRESS_5:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_5;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_6;
                end
        end
        RX_ADRESS_6:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_6;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_7;
                end
        end
        RX_ADRESS_7:
        begin
 
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_7;
                end
                else
                begin
                        next_state_rx = RX_ADRESS_8;
                end
 
        end
        RX_ADRESS_8:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_ADRESS_8;
                end
                else
                begin
                        next_state_rx = RX_RESPONSE_ADRESS;
                end
        end
        RX_RESPONSE_ADRESS:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_RESPONSE_ADRESS;
                end
                else
                begin
                        next_state_rx = RX_DATA0_1;
                end
        end
 
        RX_DATA0_1:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_1;
                end
                else
                begin
                        next_state_rx = RX_DATA0_2;
                end
        end
        RX_DATA0_2:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_2;
                end
                else
                begin
                        next_state_rx = RX_DATA0_3;
                end
        end
        RX_DATA0_3:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_3;
                end
                else
                begin
                        next_state_rx = RX_DATA0_4;
                end
        end
        RX_DATA0_4:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_4;
                end
                else
                begin
                        next_state_rx = RX_DATA0_5;
                end
        end
        RX_DATA0_5:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_5;
                end
                else
                begin
                        next_state_rx = RX_DATA0_6;
                end
        end
        RX_DATA0_6:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_6;
                end
                else
                begin
                        next_state_rx = RX_DATA0_7;
                end
        end
        RX_DATA0_7:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_7;
                end
                else
                begin
                        next_state_rx = RX_DATA0_8;
                end
        end
        RX_DATA0_8:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA0_8;
                end
                else
                begin
                        next_state_rx = RX_RESPONSE_DATA0_1;
                end
        end
        RX_RESPONSE_DATA0_1:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_RESPONSE_DATA0_1;
                end
                else
                begin
                        next_state_rx = RX_DATA1_1;
                end
        end
        RX_DATA1_1:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_1;
                end
                else
                begin
                        next_state_rx = RX_DATA1_2;
                end
        end
        RX_DATA1_2:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_1;
                end
                else
                begin
                        next_state_rx = RX_DATA1_3;
                end
        end
        RX_DATA1_3:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_3;
                end
                else
                begin
                        next_state_rx = RX_DATA1_4;
                end
        end
        RX_DATA1_4:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_4;
                end
                else
                begin
                        next_state_rx = RX_DATA1_5;
                end
        end
        RX_DATA1_5:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_5;
                end
                else
                begin
                        next_state_rx = RX_DATA1_6;
                end
        end
        RX_DATA1_6:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_6;
                end
                else
                begin
                        next_state_rx = RX_DATA1_7;
                end
        end
        RX_DATA1_7:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_7;
                end
                else
                begin
                        next_state_rx = RX_DATA1_8;
                end
        end
        RX_DATA1_8:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DATA1_8;
                end
                else
                begin
                        next_state_rx = RX_RESPONSE_DATA1_1;
                end
        end
        RX_RESPONSE_DATA1_1:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_RESPONSE_DATA1_1;
                end
                else
                begin
                        next_state_rx = RX_DELAY_BYTES;
                end
        end
        RX_DELAY_BYTES:
        begin
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_DELAY_BYTES;
                end
                else
                begin
 
                        if(count_rx == 2'd0)
                        begin
                                next_state_rx = RX_ADRESS_1;
                        end
                        else if(count_rx == 2'd1)
                        begin
                                next_state_rx = RX_DATA0_1;
                        end
                        else if(count_rx == 2'd2)
                        begin
                                next_state_rx = RX_DATA1_1;
                        end
                        else if(count_rx == 2'd3)
                        begin
                                next_state_rx = RX_STOP;
                        end
 
                end
        end
        RX_NACK:
        begin
 
                        if(count_receive_data != DATA_CONFIG_REG[13:2]*2'd2)
                        begin
                                next_state_rx = RX_NACK;
                        end
                        else
                        begin
                                if(count_rx == 2'd0)
                                begin
                                        next_state_rx = RX_CONTROLIN_1;
                                end
                                else if(count_rx == 2'd1)
                                begin
                                        next_state_rx = RX_ADRESS_1;
                                end
                                else if(count_rx == 2'd2)
                                begin
                                        next_state_rx = RX_DATA0_1;
                                end
                                else if(count_rx == 2'd3)
                                begin
                                        next_state_rx = RX_DATA1_1;
                                end
                        end
 
 
        end
        RX_STOP:
        begin
 
                if(count_receive_data != DATA_CONFIG_REG[13:2])
                begin
                        next_state_rx = RX_STOP;
                end
                else
                begin
                        next_state_rx = RX_IDLE;
                end
 
        end
        default:
        begin
                        next_state_rx = RX_IDLE;
        end
        endcase
end
 
 
//SEQUENTIAL BLOCK RX
 
always@(posedge PCLK)
begin
 
        if(!PRESETn)
        begin
                //SIGNALS MUST BE RESETED
                count_receive_data <= 12'd0;
                state_rx <= RX_IDLE;
                fifo_rx_wr_en <= 1'b0;
                count_rx <= 2'd0;
        end
        else
        begin
 
                state_rx <= next_state_rx;
 
                case(state_rx)//STATE_RX IS MORE SECURE CHANGE ONLY IF YOU KNOW WHAT ARE YOU DOING 
                RX_IDLE:
                begin
                        if(SDA == 1'b0 && SCL == 1'b1)
                        begin
                                count_receive_data <= count_receive_data +12'd1;
                        end
                        else
                        begin
                                count_receive_data <= 12'd0;
                        end
                end
                RX_START:
                begin
                        if(SDA == 1'b0 && SCL == 1'b0)
                        begin
                                count_receive_data <= count_receive_data +12'd1;
                        end
                        else
                        begin
                                count_receive_data <= 12'd0;
                        end
                end
                RX_CONTROLIN_1:
                begin
 
                end
                RX_CONTROLIN_2:
                begin
 
                end
                RX_CONTROLIN_3:
                begin
 
                end
                RX_CONTROLIN_4:
                begin
 
                end
                RX_CONTROLIN_5:
                begin
 
                end
                RX_CONTROLIN_6:
                begin
 
                end
                RX_CONTROLIN_7:
                begin
 
                end
                RX_CONTROLIN_8:
                begin
 
                end
                RX_RESPONSE_CIN:
                begin
 
                end
                RX_ADRESS_1:
                begin
                end
                RX_ADRESS_2:
                begin
                end
                RX_ADRESS_3:
                begin
                end
                RX_ADRESS_4:
                begin
                end
                RX_ADRESS_5:
                begin
                end
                RX_ADRESS_6:
                begin
                end
                RX_ADRESS_7:
                begin
                end
                RX_ADRESS_8:
                begin
                end
                RX_RESPONSE_ADRESS:
                begin
 
                end
                RX_DATA0_1:
                begin
 
                end
                RX_DATA0_2:
                begin
 
                end
                RX_DATA0_3:
                begin
 
                end
                RX_DATA0_4:
                begin
 
                end
                RX_DATA0_5:
                begin
 
                end
                RX_DATA0_6:
                begin
 
                end
                RX_DATA0_7:
                begin
 
                end
                RX_DATA0_8:
                begin
 
                end
                RX_RESPONSE_DATA0_1:
                begin
                end
 
                RX_DATA1_1:
                begin
 
                end
                RX_DATA1_2:
                begin
 
                end
                RX_DATA1_3:
                begin
 
                end
                RX_DATA1_4:
                begin
 
                end
                RX_DATA1_5:
                begin
 
                end
                RX_DATA1_6:
                begin
 
                end
                RX_DATA1_7:
                begin
 
                end
                RX_DATA1_8:
                begin
 
                end
                RX_RESPONSE_DATA1_1:
                begin
                end
                RX_DELAY_BYTES:
                begin
 
                end
                RX_NACK:
                begin
 
 
                end
                RX_STOP:
                begin
 
 
                end
                default:
                begin
                        count_receive_data <= 12'd4095;
                        fifo_rx_wr_en <= 1'b0;
                        count_rx <= 2'd3;
                end
                endcase
        end
end
 
endmodule
Browse

Tools

Subversion Repositories apbi2c

[/] [apbi2c/] [trunk/] [rtl/] [module_i2c.v] - Blame information for rev 11

Line No.	Rev	Author	Line
1	2	redbear	`//////////////////////////////////////////////////////////////////`
2			`////`
3			`////`
4			`//// TOP I2C BLOCK to I2C Core`
5			`////`
6			`////`
7			`////`
8			`//// This file is part of the APB to I2C project`
9			`////`
10			`//// http://www.opencores.org/cores/apbi2c/`
11			`////`
12			`////`
13			`////`
14			`//// Description`
15			`////`
16			`//// Implementation of APB IP core according to`
17			`////`
18			`//// apbi2c_spec IP core specification document.`
19			`////`
20			`////`
21			`////`
22			`//// To Do: Things are right here but always all block can suffer changes`
23			`////`
24			`////`
25			`////`
26			`////`
27			`////`
28			`//// Author(s): - Felipe Fernandes Da Costa, fefe2560@gmail.com`
29	4	redbear	`//// Ronal Dario Celaya ,rcelaya.dario@gmail.com`
30	2	redbear	`////`
31			`/////////////////////////////////////////////////////////////////`
32			`////`
33			`////`
34			`//// Copyright (C) 2009 Authors and OPENCORES.ORG`
35			`////`
36			`////`
37			`////`
38			`//// This source file may be used and distributed without`
39			`////`
40			`//// restriction provided that this copyright statement is not`