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[/] [turbo8051/] [trunk/] [rtl/] [8051/] [oc8051_sfr.v] - Rev 57
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////////////////////////////////////////////////////////////////////// //// //// //// 8051 cores sfr top level module //// //// //// //// This file is part of the 8051 cores project //// //// http://www.opencores.org/cores/8051/ //// //// //// //// Description //// //// special function registers for oc8051 //// //// //// //// To Do: //// //// nothing //// //// //// //// Author(s): //// //// - Simon Teran, simont@opencores.org //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 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 //// //// //// ////////////////////////////////////////////////////////////////////// // // CVS Revision History // // $Log: not supported by cvs2svn $ // Revision 1.14 2003/05/07 12:39:20 simont // fix bug in case of sequence of inc dptr instrucitons. // // Revision 1.13 2003/05/05 15:46:37 simont // add aditional alu destination to solve critical path. // // Revision 1.12 2003/04/29 11:24:31 simont // fix bug in case execution of two data dependent instructions. // // Revision 1.11 2003/04/25 17:15:51 simont // change branch instruction execution (reduse needed clock periods). // // Revision 1.10 2003/04/10 12:43:19 simont // defines for pherypherals added // // Revision 1.9 2003/04/09 16:24:03 simont // change wr_sft to 2 bit wire. // // Revision 1.8 2003/04/09 15:49:42 simont // Register oc8051_sfr dato output, add signal wait_data. // // Revision 1.7 2003/04/07 14:58:02 simont // change sfr's interface. // // Revision 1.6 2003/04/07 13:29:16 simont // change uart to meet timing. // // Revision 1.5 2003/04/04 10:35:07 simont // signal prsc_ow added. // // Revision 1.4 2003/03/28 17:45:57 simont // change module name. // // Revision 1.3 2003/01/21 13:51:30 simont // add include oc8051_defines.v // // Revision 1.2 2003/01/13 14:14:41 simont // replace some modules // // Revision 1.1 2002/11/05 17:22:27 simont // initial import // // // synopsys translate_off `include "oc8051_timescale.v" // synopsys translate_on `include "oc8051_defines.v" module oc8051_sfr (rst, clk, adr0, adr1, dat0, dat1, dat2, bit_in, des_acc, we, wr_bit, bit_out, wr_sfr, acc, ram_wr_sel, ram_rd_sel, sp, sp_w, bank_sel, desAc, desOv, srcAc, cy, psw_set, rmw, comp_sel, comp_wait, `ifdef OC8051_PORTS `ifdef OC8051_PORT0 p0_out, p0_in, `endif `ifdef OC8051_PORT1 p1_out, p1_in, `endif `ifdef OC8051_PORT2 p2_out, p2_in, `endif `ifdef OC8051_PORT3 p3_out, p3_in, `endif `endif `ifdef OC8051_UART rxd, txd, `endif int_ack, intr, int0, int1, int_src, reti, `ifdef OC8051_TC01 t0, t1, `endif `ifdef OC8051_TC2 t2, t2ex, `endif dptr_hi, dptr_lo, wait_data); input rst, // reset - pin clk, // clock - pin we, // write enable bit_in, desAc, desOv, rmw; input int_ack, int0, int1, reti, wr_bit; input [1:0] psw_set, wr_sfr, comp_sel; input [2:0] ram_rd_sel, ram_wr_sel; input [7:0] adr0, //address 0 input adr1, //address 1 input des_acc, dat1, //data 1 input (des1) dat2; //data 2 input (des2) output bit_out, intr, srcAc, cy, wait_data, comp_wait; output [1:0] bank_sel; output [7:0] dat0, //data output int_src, dptr_hi, dptr_lo, acc; output [7:0] sp, sp_w; // ports `ifdef OC8051_PORTS `ifdef OC8051_PORT0 input [7:0] p0_in; output [7:0] p0_out; wire [7:0] p0_data; `endif `ifdef OC8051_PORT1 input [7:0] p1_in; output [7:0] p1_out; wire [7:0] p1_data; `endif `ifdef OC8051_PORT2 input [7:0] p2_in; output [7:0] p2_out; wire [7:0] p2_data; `endif `ifdef OC8051_PORT3 input [7:0] p3_in; output [7:0] p3_out; wire [7:0] p3_data; `endif `endif // serial interface `ifdef OC8051_UART input rxd; output txd; `endif // timer/counter 0,1 `ifdef OC8051_TC01 input t0, t1; `endif // timer/counter 2 `ifdef OC8051_TC2 input t2, t2ex; `endif reg bit_out, wait_data; reg [7:0] dat0, adr0_r; reg wr_bit_r; reg [2:0] ram_wr_sel_r; wire p, uart_int, tf0, tf1, tr0, tr1, rclk, tclk, brate2, tc2_int; wire [7:0] b_reg, psw, `ifdef OC8051_TC2 // t/c 2 t2con, tl2, th2, rcap2l, rcap2h, `endif `ifdef OC8051_TC01 // t/c 0,1 tmod, tl0, th0, tl1, th1, `endif // serial interface `ifdef OC8051_UART scon, pcon, sbuf, `endif //interrupt control ie, tcon, ip; reg pres_ow; reg [3:0] prescaler; assign cy = psw[7]; assign srcAc = psw [6]; // // accumulator // ACC oc8051_acc oc8051_acc1(.clk(clk), .rst(rst), .bit_in(bit_in), .data_in(des_acc), .data2_in(dat2), .wr(we), .wr_bit(wr_bit_r), .wr_sfr(wr_sfr), .wr_addr(adr1), .data_out(acc), .p(p)); // // b register // B oc8051_b_register oc8051_b_register (.clk(clk), .rst(rst), .bit_in(bit_in), .data_in(des_acc), .wr(we), .wr_bit(wr_bit_r), .wr_addr(adr1), .data_out(b_reg)); // //stack pointer // SP oc8051_sp oc8051_sp1(.clk(clk), .rst(rst), .ram_rd_sel(ram_rd_sel), .ram_wr_sel(ram_wr_sel), .wr_addr(adr1), .wr(we), .wr_bit(wr_bit_r), .data_in(dat1), .sp_out(sp), .sp_w(sp_w)); // //data pointer // DPTR, DPH, DPL oc8051_dptr oc8051_dptr1(.clk(clk), .rst(rst), .addr(adr1), .data_in(des_acc), .data2_in(dat2), .wr(we), .wr_bit(wr_bit_r), .data_hi(dptr_hi), .data_lo(dptr_lo), .wr_sfr(wr_sfr)); // //program status word // PSW oc8051_psw oc8051_psw1 (.clk(clk), .rst(rst), .wr_addr(adr1), .data_in(dat1), .wr(we), .wr_bit(wr_bit_r), .data_out(psw), .p(p), .cy_in(bit_in), .ac_in(desAc), .ov_in(desOv), .set(psw_set), .bank_sel(bank_sel)); // // ports // P0, P1, P2, P3 `ifdef OC8051_PORTS oc8051_ports oc8051_ports1(.clk(clk), .rst(rst), .bit_in(bit_in), .data_in(dat1), .wr(we), .wr_bit(wr_bit_r), .wr_addr(adr1), `ifdef OC8051_PORT0 .p0_out(p0_out), .p0_in(p0_in), .p0_data(p0_data), `endif `ifdef OC8051_PORT1 .p1_out(p1_out), .p1_in(p1_in), .p1_data(p1_data), `endif `ifdef OC8051_PORT2 .p2_out(p2_out), .p2_in(p2_in), .p2_data(p2_data), `endif `ifdef OC8051_PORT3 .p3_out(p3_out), .p3_in(p3_in), .p3_data(p3_data), `endif .rmw(rmw)); `endif // // serial interface // SCON, SBUF `ifdef OC8051_UART oc8051_uart oc8051_uatr1 (.clk(clk), .rst(rst), .bit_in(bit_in), .data_in(dat1), .wr(we), .wr_bit(wr_bit_r), .wr_addr(adr1), .rxd(rxd), .txd(txd), // interrupt .intr(uart_int), // baud rate sources .brate2(brate2), .t1_ow(tf1), .pres_ow(pres_ow), .rclk(rclk), .tclk(tclk), //registers .scon(scon), .pcon(pcon), .sbuf(sbuf)); `else assign uart_int = 1'b0; `endif // // interrupt control // IP, IE, TCON oc8051_int oc8051_int1 (.clk(clk), .rst(rst), .wr_addr(adr1), .bit_in(bit_in), .ack(int_ack), .data_in(dat1), .wr(we), .wr_bit(wr_bit_r), .tf0(tf0), .tf1(tf1), .t2_int(tc2_int), .tr0(tr0), .tr1(tr1), .ie0(int0), .ie1(int1), .uart_int(uart_int), .reti(reti), .intr(intr), .int_vec(int_src), .ie(ie), .tcon(tcon), .ip(ip)); // // timer/counter control // TH0, TH1, TL0, TH1, TMOD `ifdef OC8051_TC01 oc8051_tc oc8051_tc1(.clk(clk), .rst(rst), .wr_addr(adr1), .data_in(dat1), .wr(we), .wr_bit(wr_bit_r), .ie0(int0), .ie1(int1), .tr0(tr0), .tr1(tr1), .t0(t0), .t1(t1), .tf0(tf0), .tf1(tf1), .pres_ow(pres_ow), .tmod(tmod), .tl0(tl0), .th0(th0), .tl1(tl1), .th1(th1)); `else assign tf0 = 1'b0; assign tf1 = 1'b0; `endif // // timer/counter 2 // TH2, TL2, RCAPL2L, RCAPL2H, T2CON `ifdef OC8051_TC2 oc8051_tc2 oc8051_tc21(.clk(clk), .rst(rst), .wr_addr(adr1), .data_in(dat1), .wr(we), .wr_bit(wr_bit_r), .bit_in(bit_in), .t2(t2), .t2ex(t2ex), .rclk(rclk), .tclk(tclk), .brate2(brate2), .tc2_int(tc2_int), .pres_ow(pres_ow), .t2con(t2con), .tl2(tl2), .th2(th2), .rcap2l(rcap2l), .rcap2h(rcap2h)); `else assign tc2_int = 1'b0; assign rclk = 1'b0; assign tclk = 1'b0; assign brate2 = 1'b0; `endif always @(posedge clk or posedge rst) if (rst) begin adr0_r <= #1 8'h00; ram_wr_sel_r <= #1 3'b000; wr_bit_r <= #1 1'b0; // wait_data <= #1 1'b0; end else begin adr0_r <= #1 adr0; ram_wr_sel_r <= #1 ram_wr_sel; wr_bit_r <= #1 wr_bit; end assign comp_wait = !( ((comp_sel==`OC8051_CSS_AZ) & ((wr_sfr==`OC8051_WRS_ACC1) | (wr_sfr==`OC8051_WRS_ACC2) | ((adr1==`OC8051_SFR_ACC) & we & !wr_bit_r) | ((adr1[7:3]==`OC8051_SFR_B_ACC) & we & wr_bit_r))) | ((comp_sel==`OC8051_CSS_CY) & ((|psw_set) | ((adr1==`OC8051_SFR_PSW) & we & !wr_bit_r) | ((adr1[7:3]==`OC8051_SFR_B_PSW) & we & wr_bit_r))) | ((comp_sel==`OC8051_CSS_BIT) & ((adr1[7:3]==adr0[7:3]) & (~&adr1[2:0]) & we & !wr_bit_r) | ((adr1==adr0) & adr1[7] & we & !wr_bit_r))); // //set output in case of address (byte) always @(posedge clk or posedge rst) begin if (rst) begin dat0 <= #1 8'h00; wait_data <= #1 1'b0; end else if ((wr_sfr==`OC8051_WRS_DPTR) & (adr0==`OC8051_SFR_DPTR_LO)) begin //write and read same address dat0 <= #1 des_acc; wait_data <= #1 1'b0; end else if ( ( ((wr_sfr==`OC8051_WRS_ACC1) & (adr0==`OC8051_SFR_ACC)) | //write to acc // ((wr_sfr==`OC8051_WRS_DPTR) & (adr0==`OC8051_SFR_DPTR_LO)) | //write to dpl (adr1[7] & (adr1==adr0) & we & !wr_bit_r) | //write and read same address (adr1[7] & (adr1[7:3]==adr0[7:3]) & (~&adr0[2:0]) & we & wr_bit_r) //write bit addressable to read address ) & !wait_data) begin wait_data <= #1 1'b1; end else if (( ((|psw_set) & (adr0==`OC8051_SFR_PSW)) | ((wr_sfr==`OC8051_WRS_ACC2) & (adr0==`OC8051_SFR_ACC)) | //write to acc ((wr_sfr==`OC8051_WRS_DPTR) & (adr0==`OC8051_SFR_DPTR_HI)) //write to dph ) & !wait_data) begin wait_data <= #1 1'b1; end else begin case (adr0) /* synopsys full_case parallel_case */ `OC8051_SFR_ACC: dat0 <= #1 acc; `OC8051_SFR_PSW: dat0 <= #1 psw; `ifdef OC8051_PORTS `ifdef OC8051_PORT0 `OC8051_SFR_P0: dat0 <= #1 p0_data; `endif `ifdef OC8051_PORT1 `OC8051_SFR_P1: dat0 <= #1 p1_data; `endif `ifdef OC8051_PORT2 `OC8051_SFR_P2: dat0 <= #1 p2_data; `endif `ifdef OC8051_PORT3 `OC8051_SFR_P3: dat0 <= #1 p3_data; `endif `endif `OC8051_SFR_SP: dat0 <= #1 sp; `OC8051_SFR_B: dat0 <= #1 b_reg; `OC8051_SFR_DPTR_HI: dat0 <= #1 dptr_hi; `OC8051_SFR_DPTR_LO: dat0 <= #1 dptr_lo; `ifdef OC8051_UART `OC8051_SFR_SCON: dat0 <= #1 scon; `OC8051_SFR_SBUF: dat0 <= #1 sbuf; `OC8051_SFR_PCON: dat0 <= #1 pcon; `endif `ifdef OC8051_TC01 `OC8051_SFR_TH0: dat0 <= #1 th0; `OC8051_SFR_TH1: dat0 <= #1 th1; `OC8051_SFR_TL0: dat0 <= #1 tl0; `OC8051_SFR_TL1: dat0 <= #1 tl1; `OC8051_SFR_TMOD: dat0 <= #1 tmod; `endif `OC8051_SFR_IP: dat0 <= #1 ip; `OC8051_SFR_IE: dat0 <= #1 ie; `OC8051_SFR_TCON: dat0 <= #1 tcon; `ifdef OC8051_TC2 `OC8051_SFR_RCAP2H: dat0 <= #1 rcap2h; `OC8051_SFR_RCAP2L: dat0 <= #1 rcap2l; `OC8051_SFR_TH2: dat0 <= #1 th2; `OC8051_SFR_TL2: dat0 <= #1 tl2; `OC8051_SFR_T2CON: dat0 <= #1 t2con; `endif // default: dat0 <= #1 8'h00; endcase wait_data <= #1 1'b0; end end // //set output in case of address (bit) always @(posedge clk or posedge rst) begin if (rst) bit_out <= #1 1'h0; else if ( ((adr1[7:3]==adr0[7:3]) & (~&adr1[2:0]) & we & !wr_bit_r) | ((wr_sfr==`OC8051_WRS_ACC1) & (adr0[7:3]==`OC8051_SFR_B_ACC)) //write to acc ) bit_out <= #1 dat1[adr0[2:0]]; else if ((adr1==adr0) & we & wr_bit_r) bit_out <= #1 bit_in; else case (adr0[7:3]) /* synopsys full_case parallel_case */ `OC8051_SFR_B_ACC: bit_out <= #1 acc[adr0[2:0]]; `OC8051_SFR_B_PSW: bit_out <= #1 psw[adr0[2:0]]; `ifdef OC8051_PORTS `ifdef OC8051_PORT0 `OC8051_SFR_B_P0: bit_out <= #1 p0_data[adr0[2:0]]; `endif `ifdef OC8051_PORT1 `OC8051_SFR_B_P1: bit_out <= #1 p1_data[adr0[2:0]]; `endif `ifdef OC8051_PORT2 `OC8051_SFR_B_P2: bit_out <= #1 p2_data[adr0[2:0]]; `endif `ifdef OC8051_PORT3 `OC8051_SFR_B_P3: bit_out <= #1 p3_data[adr0[2:0]]; `endif `endif `OC8051_SFR_B_B: bit_out <= #1 b_reg[adr0[2:0]]; `OC8051_SFR_B_IP: bit_out <= #1 ip[adr0[2:0]]; `OC8051_SFR_B_IE: bit_out <= #1 ie[adr0[2:0]]; `OC8051_SFR_B_TCON: bit_out <= #1 tcon[adr0[2:0]]; `ifdef OC8051_UART `OC8051_SFR_B_SCON: bit_out <= #1 scon[adr0[2:0]]; `endif `ifdef OC8051_TC2 `OC8051_SFR_B_T2CON: bit_out <= #1 t2con[adr0[2:0]]; `endif // default: bit_out <= #1 1'b0; endcase end always @(posedge clk or posedge rst) begin if (rst) begin prescaler <= #1 4'h0; pres_ow <= #1 1'b0; end else if (prescaler==4'b1011) begin prescaler <= #1 4'h0; pres_ow <= #1 1'b1; end else begin prescaler <= #1 prescaler + 4'h1; pres_ow <= #1 1'b0; end end endmodule
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