OpenCores
URL https://opencores.org/ocsvn/sdcard_mass_storage_controller/sdcard_mass_storage_controller/trunk

Subversion Repositories sdcard_mass_storage_controller

Compare Revisions

  • This comparison shows the changes necessary to convert path 
    /sdcard_mass_storage_controller/trunk
    from Rev 61 to Rev 62
    ↔ Reverse comparison
  •

Rev 61 → Rev 62

/rtl/sdc_dma/verilog/SD_data_host.v
1,412 → 1,417
//-------------------------
//-------------------------
 
 
 
 
`include "SD_defines.v"
 
 
module SD_DATA_SERIAL_HOST(
input sd_clk,
input rst,
//Tx Fifo
input [31:0] data_in ,
 
output reg rd,
//Rx Fifo
output reg [`SD_BUS_W-1:0] data_out ,
output reg we,
//tristate data
output reg DAT_oe_o,
output reg[`SD_BUS_W-1:0] DAT_dat_o,
input [`SD_BUS_W-1:0] DAT_dat_i,
//Controll signals
input [1:0] start_dat,
input ack_transfer,
 
output reg busy_n,
output reg transm_complete,
output reg crc_ok
);
 
//CRC16
reg [`SD_BUS_W-1:0] crc_in;
reg crc_en;
reg crc_rst;
wire [15:0] crc_out [`SD_BUS_W-1:0];
reg [`SD_BUS_W-1:0] temp_in;
reg [10:0] transf_cnt;
parameter SIZE = 6;
reg [SIZE-1:0] state;
reg [SIZE-1:0] next_state;
parameter IDLE = 6'b000001;
parameter WRITE_DAT = 6'b000010;
parameter WRITE_CRC = 6'b000100;
parameter WRITE_BUSY = 6'b001000;
parameter READ_WAIT = 6'b010000;
parameter READ_DAT = 6'b100000;
reg [2:0] crc_status;
reg busy_int;
genvar i;
generate
for(i=0; i<`SD_BUS_W; i=i+1) begin:CRC_16_gen
CRC_16 CRC_16_i (crc_in[i],crc_en, sd_clk, crc_rst, crc_out[i]);
end
endgenerate
 
reg ack_transfer_int;
always @ (posedge sd_clk or posedge rst )
begin
if (rst)
ack_transfer_int <=0;
else
ack_transfer_int<=ack_transfer;
end
reg q_start_bit;
always @ (state or start_dat or q_start_bit or transf_cnt or crc_status or busy_int or DAT_dat_i or ack_transfer_int)
begin : FSM_COMBO
next_state = 0;
case(state)
IDLE: begin
if (start_dat == 2'b01)
next_state=WRITE_DAT;
else if (start_dat == 2'b10)
next_state=READ_WAIT;
else
next_state=IDLE;
end
WRITE_DAT: begin
if (transf_cnt >= `BIT_BLOCK)
next_state= WRITE_CRC;
else if (start_dat == 2'b11)
next_state=IDLE;
else
next_state=WRITE_DAT;
end
 
WRITE_CRC: begin
if (crc_status ==0)
next_state= WRITE_BUSY;
else
next_state=WRITE_CRC;
end
WRITE_BUSY: begin
if ( (busy_int ==1) & ack_transfer_int)
next_state= IDLE;
else
next_state = WRITE_BUSY;
end
READ_WAIT: begin
if (q_start_bit== 0 )
next_state= READ_DAT;
else
next_state=READ_WAIT;
end
READ_DAT: begin
if ( ack_transfer_int) //Startbit consumed...
next_state= IDLE;
else if (start_dat == 2'b11)
next_state=IDLE;
else
next_state=READ_DAT;
end
endcase
end
 
always @ (posedge sd_clk or posedge rst )
begin
if (rst ) begin
q_start_bit<=1;
end
else begin
q_start_bit <= DAT_dat_i[0];
end
end
 
 
//----------------Seq logic------------
always @ (posedge sd_clk or posedge rst )
begin : FSM_SEQ
if (rst ) begin
state <= #1 IDLE;
end
else begin
state <= #1 next_state;
end
end
 
reg [4:0] crc_c;
reg [3:0] last_din;
reg [2:0] crc_s ;
reg [31:0] write_buf_0,write_buf_1, sd_data_out;
reg out_buff_ptr,in_buff_ptr;
reg [2:0] data_send_index;
always @ (negedge sd_clk or posedge rst )
begin
if (rst) begin
DAT_oe_o<=0;
crc_en<=0;
crc_rst<=1;
transf_cnt<=0;
crc_c<=15;
rd<=0;
last_din<=0;
crc_c<=0;
crc_in<=0;
DAT_dat_o<=0;
crc_status<=7;
crc_s<=0;
transm_complete<=0;
busy_n<=1;
we<=0;
data_out<=0;
crc_ok<=0;
busy_int<=0;
data_send_index<=0;
out_buff_ptr<=0;
in_buff_ptr<=0;
end
else begin
case(state)
IDLE: begin
DAT_oe_o<=0;
DAT_dat_o<=4'b1111;
crc_en<=0;
crc_rst<=1;
transf_cnt<=0;
crc_c<=16;
crc_status<=7;
crc_s<=0;
we<=0;
rd<=0;
busy_n<=1;
data_send_index<=0;
out_buff_ptr<=0;
in_buff_ptr<=0;
end
WRITE_DAT: begin
transm_complete <=0;
busy_n<=0;
crc_ok<=0;
transf_cnt<=transf_cnt+1;
rd<=0;
if ( (in_buff_ptr != out_buff_ptr) || (!transf_cnt) ) begin
rd <=1;
if (!in_buff_ptr)
write_buf_0<=data_in;
else
write_buf_1 <=data_in;
in_buff_ptr<=in_buff_ptr+1;
end
if (!out_buff_ptr)
sd_data_out<=write_buf_0;
else
sd_data_out<=write_buf_1;
if (transf_cnt==1) begin
crc_rst<=0;
crc_en<=1;
last_din <=write_buf_0[3:0];
DAT_oe_o<=1;
DAT_dat_o<=0;
crc_in<= write_buf_0[3:0];
data_send_index<=1;
end
else if ( (transf_cnt>=2) && (transf_cnt<=`BIT_BLOCK-`CRC_OFF )) begin
DAT_oe_o<=1;
case (data_send_index)
0:begin
last_din <=sd_data_out[3:0];
crc_in <=sd_data_out[3:0];
end
1:begin
last_din <=sd_data_out[7:4];
crc_in <=sd_data_out[7:4];
end
2:begin
last_din <=sd_data_out[11:8];
crc_in <=sd_data_out[11:8];
end
3:begin
last_din <=sd_data_out[15:12];
crc_in <=sd_data_out[15:12];
end
4:begin
last_din <=sd_data_out[19:16];
crc_in <=sd_data_out[19:16];
end
5:begin
last_din <=sd_data_out[23:20];
crc_in <=sd_data_out[23:20];
end
6:begin
last_din <=sd_data_out[27:24];
crc_in <=sd_data_out[27:24];
out_buff_ptr<=out_buff_ptr+1;
end
7:begin
last_din <=sd_data_out[31:28];
crc_in <=sd_data_out[31:28];
end
endcase
data_send_index<=data_send_index+1;
DAT_dat_o<= last_din;
if ( transf_cnt >=`BIT_BLOCK-`CRC_OFF ) begin
crc_en<=0;
end
end
else if (transf_cnt>`BIT_BLOCK-`CRC_OFF & crc_c!=0) begin
rd<=0;
crc_en<=0;
crc_c<=crc_c-1;
DAT_oe_o<=1;
DAT_dat_o[0]<=crc_out[0][crc_c-1];
DAT_dat_o[1]<=crc_out[1][crc_c-1];
DAT_dat_o[2]<=crc_out[2][crc_c-1];
DAT_dat_o[3]<=crc_out[3][crc_c-1];
end
else if (transf_cnt==`BIT_BLOCK-2) begin
DAT_oe_o<=1;
DAT_dat_o<=4'b1111;
rd<=0;
end
else if (transf_cnt !=0) begin
DAT_oe_o<=0;
rd<=0;
end
end
WRITE_CRC : begin
rd<=0;
DAT_oe_o<=0;
crc_status<=crc_status-1;
if (( crc_status<=4) && ( crc_status>=2) )
crc_s[crc_status-2] <=DAT_dat_i[0];
end
WRITE_BUSY : begin
transm_complete <=1;
if (crc_s == 3'b010)
crc_ok<=1;
else
crc_ok<=0;
busy_int<=DAT_dat_i[0];
`ifdef SIM
crc_ok<=1;
`endif
/* `ifdef NO_CRC_CHECK_ON_WRITE_DATA
crc_ok<=1;
`endif
*/
end
READ_WAIT:begin
DAT_oe_o<=0;
crc_rst<=0;
crc_en<=1;
crc_in<=0;
crc_c<=15;// end
busy_n<=0;
transm_complete<=0;
end
READ_DAT: begin
if (transf_cnt<`BIT_BLOCK_REC) begin
we<=1;
data_out<=DAT_dat_i;
crc_in<=DAT_dat_i;
crc_ok<=1;
transf_cnt<=transf_cnt+1;
end
else if ( transf_cnt <= (`BIT_BLOCK_REC +`BIT_CRC_CYCLE)) begin
transf_cnt<=transf_cnt+1;
crc_en<=0;
last_din <=DAT_dat_i;
if (transf_cnt> `BIT_BLOCK_REC) begin
crc_c<=crc_c-1;
we<=0;
`ifdef SD_BUS_WIDTH_1
if (crc_out[0][crc_status] == last_din[0])
crc_ok<=0;
`endif
`ifdef SD_BUS_WIDTH_4
if (crc_out[0][crc_c] != last_din[0])
crc_ok<=0;
if (crc_out[1][crc_c] != last_din[1])
crc_ok<=0;
if (crc_out[2][crc_c] != last_din[2])
crc_ok<=0;
if (crc_out[3][crc_c] != last_din[3])
crc_ok<=0;
`endif
`ifdef SIM
crc_ok<=1;
`endif
if (crc_c==0) begin
transm_complete <=1;
busy_n<=0;
we<=0;
end
end
end
end
endcase
end
 
end
 
 
 
 
 
 
 
 
//Sync
 
 
 
 
 
endmodule
 
 
 
//-------------------------
//-------------------------
 
 
 
 
`include "SD_defines.v"
 
 
module SD_DATA_SERIAL_HOST(
input sd_clk,
input rst,
//Tx Fifo
input [31:0] data_in ,
 
output reg rd,
//Rx Fifo
output reg [`SD_BUS_W-1:0] data_out ,
output reg we,
//tristate data
output reg DAT_oe_o,
output reg[`SD_BUS_W-1:0] DAT_dat_o,
input [`SD_BUS_W-1:0] DAT_dat_i,
//Controll signals
input [1:0] start_dat,
input ack_transfer,
 
output reg busy_n,
output reg transm_complete,
output reg crc_ok
);
 
//CRC16
reg [`SD_BUS_W-1:0] crc_in;
reg crc_en;
reg crc_rst;
wire [15:0] crc_out [`SD_BUS_W-1:0];
reg [`SD_BUS_W-1:0] temp_in;
reg [10:0] transf_cnt;
parameter SIZE = 6;
reg [SIZE-1:0] state;
reg [SIZE-1:0] next_state;
parameter IDLE = 6'b000001;
parameter WRITE_DAT = 6'b000010;
parameter WRITE_CRC = 6'b000100;
parameter WRITE_BUSY = 6'b001000;
parameter READ_WAIT = 6'b010000;
parameter READ_DAT = 6'b100000;
reg [2:0] crc_status;
reg busy_int;
genvar i;
generate
for(i=0; i<`SD_BUS_W; i=i+1) begin:CRC_16_gen
SD_CRC_16 CRC_16_i (crc_in[i],crc_en, sd_clk, crc_rst, crc_out[i]);
end
endgenerate
 
reg ack_transfer_int;
reg ack_q;
always @ (posedge sd_clk or posedge rst )
begin
if (rst) begin
ack_transfer_int <=0;
ack_q<=0;end
else begin
ack_q<=ack_transfer;
ack_transfer_int<=ack_q;
end
end
 
reg q_start_bit;
always @ (state or start_dat or q_start_bit or transf_cnt or crc_status or busy_int or DAT_dat_i or ack_transfer_int)
begin : FSM_COMBO
next_state = 0;
case(state)
IDLE: begin
if (start_dat == 2'b01)
next_state=WRITE_DAT;
else if (start_dat == 2'b10)
next_state=READ_WAIT;
else
next_state=IDLE;
end
WRITE_DAT: begin
if (transf_cnt >= `BIT_BLOCK)
next_state= WRITE_CRC;
else if (start_dat == 2'b11)
next_state=IDLE;
else
next_state=WRITE_DAT;
end
 
WRITE_CRC: begin
if (crc_status ==0)
next_state= WRITE_BUSY;
else
next_state=WRITE_CRC;
end
WRITE_BUSY: begin
if ( (busy_int ==1) & ack_transfer_int)
next_state= IDLE;
else
next_state = WRITE_BUSY;
end
READ_WAIT: begin
if (q_start_bit== 0 )
next_state= READ_DAT;
else
next_state=READ_WAIT;
end
READ_DAT: begin
if ( ack_transfer_int) //Startbit consumed...
next_state= IDLE;
else if (start_dat == 2'b11)
next_state=IDLE;
else
next_state=READ_DAT;
end
endcase
end
 
always @ (posedge sd_clk or posedge rst )
begin
if (rst ) begin
q_start_bit<=1;
end
else begin
q_start_bit <= DAT_dat_i[0];
end
end
 
 
//----------------Seq logic------------
always @ (posedge sd_clk or posedge rst )
begin : FSM_SEQ
if (rst ) begin
state <= #1 IDLE;
end
else begin
state <= #1 next_state;
end
end
 
reg [4:0] crc_c;
reg [3:0] last_din;
reg [2:0] crc_s ;
reg [31:0] write_buf_0,write_buf_1, sd_data_out;
reg out_buff_ptr,in_buff_ptr;
reg [2:0] data_send_index;
always @ (negedge sd_clk or posedge rst )
begin
if (rst) begin
DAT_oe_o<=0;
crc_en<=0;
crc_rst<=1;
transf_cnt<=0;
crc_c<=15;
rd<=0;
last_din<=0;
crc_c<=0;
crc_in<=0;
DAT_dat_o<=0;
crc_status<=7;
crc_s<=0;
transm_complete<=0;
busy_n<=1;
we<=0;
data_out<=0;
crc_ok<=0;
busy_int<=0;
data_send_index<=0;
out_buff_ptr<=0;
in_buff_ptr<=0;
end
else begin
case(state)
IDLE: begin
DAT_oe_o<=0;
DAT_dat_o<=4'b1111;
crc_en<=0;
crc_rst<=1;
transf_cnt<=0;
crc_c<=16;
crc_status<=7;
crc_s<=0;
we<=0;
rd<=0;
busy_n<=1;
data_send_index<=0;
out_buff_ptr<=0;
in_buff_ptr<=0;
end
WRITE_DAT: begin
transm_complete <=0;
busy_n<=0;
crc_ok<=0;
transf_cnt<=transf_cnt+1;
rd<=0;
if ( (in_buff_ptr != out_buff_ptr) || (!transf_cnt) ) begin
rd <=1;
if (!in_buff_ptr)
write_buf_0<=data_in;
else
write_buf_1 <=data_in;
in_buff_ptr<=in_buff_ptr+1;
end
if (!out_buff_ptr)
sd_data_out<=write_buf_0;
else
sd_data_out<=write_buf_1;
if (transf_cnt==1) begin
crc_rst<=0;
crc_en<=1;
last_din <=write_buf_0[3:0];
DAT_oe_o<=1;
DAT_dat_o<=0;
crc_in<= write_buf_0[3:0];
data_send_index<=1;
end
else if ( (transf_cnt>=2) && (transf_cnt<=`BIT_BLOCK-`CRC_OFF )) begin
DAT_oe_o<=1;
case (data_send_index)
0:begin
last_din <=sd_data_out[3:0];
crc_in <=sd_data_out[3:0];
end
1:begin
last_din <=sd_data_out[7:4];
crc_in <=sd_data_out[7:4];
end
2:begin
last_din <=sd_data_out[11:8];
crc_in <=sd_data_out[11:8];
end
3:begin
last_din <=sd_data_out[15:12];
crc_in <=sd_data_out[15:12];
end
4:begin
last_din <=sd_data_out[19:16];
crc_in <=sd_data_out[19:16];
end
5:begin
last_din <=sd_data_out[23:20];
crc_in <=sd_data_out[23:20];
end
6:begin
last_din <=sd_data_out[27:24];
crc_in <=sd_data_out[27:24];
out_buff_ptr<=out_buff_ptr+1;
end
7:begin
last_din <=sd_data_out[31:28];
crc_in <=sd_data_out[31:28];
end
endcase
data_send_index<=data_send_index+1;
DAT_dat_o<= last_din;
if ( transf_cnt >=`BIT_BLOCK-`CRC_OFF ) begin
crc_en<=0;
end
end
else if (transf_cnt>`BIT_BLOCK-`CRC_OFF & crc_c!=0) begin
rd<=0;
crc_en<=0;
crc_c<=crc_c-1;
DAT_oe_o<=1;
DAT_dat_o[0]<=crc_out[0][crc_c-1];
DAT_dat_o[1]<=crc_out[1][crc_c-1];
DAT_dat_o[2]<=crc_out[2][crc_c-1];
DAT_dat_o[3]<=crc_out[3][crc_c-1];
end
else if (transf_cnt==`BIT_BLOCK-2) begin
DAT_oe_o<=1;
DAT_dat_o<=4'b1111;
rd<=0;
end
else if (transf_cnt !=0) begin
DAT_oe_o<=0;
rd<=0;
end
end
WRITE_CRC : begin
rd<=0;
DAT_oe_o<=0;
crc_status<=crc_status-1;
if (( crc_status<=4) && ( crc_status>=2) )
crc_s[crc_status-2] <=DAT_dat_i[0];
end
WRITE_BUSY : begin
transm_complete <=1;
if (crc_s == 3'b010)
crc_ok<=1;
else
crc_ok<=0;
busy_int<=DAT_dat_i[0];
`ifdef SIM
crc_ok<=1;
`endif
/* `ifdef NO_CRC_CHECK_ON_WRITE_DATA
crc_ok<=1;
`endif
*/
end
READ_WAIT:begin
DAT_oe_o<=0;
crc_rst<=0;
crc_en<=1;
crc_in<=0;
crc_c<=15;// end
busy_n<=0;
transm_complete<=0;
end
READ_DAT: begin
if (transf_cnt<`BIT_BLOCK_REC) begin
we<=1;
data_out<=DAT_dat_i;
crc_in<=DAT_dat_i;
crc_ok<=1;
transf_cnt<=transf_cnt+1;
end
else if ( transf_cnt <= (`BIT_BLOCK_REC +`BIT_CRC_CYCLE)) begin
transf_cnt<=transf_cnt+1;
crc_en<=0;
last_din <=DAT_dat_i;
if (transf_cnt> `BIT_BLOCK_REC) begin
crc_c<=crc_c-1;
we<=0;
`ifdef SD_BUS_WIDTH_1
if (crc_out[0][crc_status] == last_din[0])
crc_ok<=0;
`endif
`ifdef SD_BUS_WIDTH_4
if (crc_out[0][crc_c] != last_din[0])
crc_ok<=0;
if (crc_out[1][crc_c] != last_din[1])
crc_ok<=0;
if (crc_out[2][crc_c] != last_din[2])
crc_ok<=0;
if (crc_out[3][crc_c] != last_din[3])
crc_ok<=0;
`endif
`ifdef SIM
crc_ok<=1;
`endif
if (crc_c==0) begin
transm_complete <=1;
busy_n<=0;
we<=0;
end
end
end
end
endcase
end
 
end
 
 
 
 
 
 
 
 
//Sync
 
 
 
 
 
endmodule
 
 
 

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.