diff options
Diffstat (limited to 'opencores/sd_interface/model/sdModel.v')
| -rw-r--r-- | opencores/sd_interface/model/sdModel.v | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/opencores/sd_interface/model/sdModel.v b/opencores/sd_interface/model/sdModel.v deleted file mode 100644 index 1e202bac1..000000000 --- a/opencores/sd_interface/model/sdModel.v +++ /dev/null @@ -1,99 +0,0 @@ -`include "timescale.v"
-
-module sdModel(
- spiClk,
- spiDataIn,
- spiDataOut,
- spiCS_n
-);
-input spiClk;
-input spiDataIn;
-output spiDataOut;
-reg spiDataOut;
-input spiCS_n;
-
-//local wires and regs
-reg [7:0] rxByte;
-reg [7:0] respByte;
-reg [1:0] smSt;
-reg [7:0] cnt;
-
-`define START 2'b00
-`define WAIT_FF 2'b01
-`define WAIT_FF_FIN 2'b10
-
-initial
-begin
- smSt = `START;
-end
-
-
-// ------------------------------ txRxByte --------------------------
-task txRxByte;
-input [7:0] txData;
-output [7:0] rxData;
-
-integer i;
-begin
- spiDataOut <= txData[7];
- //@(negedge spiCS_n);
- for (i=0;i<=7;i=i+1) begin
- @(posedge spiClk);
- rxData[0] <= spiDataIn;
- rxData = rxData << 1;
- @(negedge spiClk);
- spiDataOut <= txData[6];
- txData = txData << 1;
- end
-end
-endtask
-
-
-//response state machine
-always begin
- case (smSt)
- `START: begin
- txRxByte(8'hff, rxByte);
- if (rxByte == 8'hff) begin
- smSt <= `WAIT_FF;
- cnt <= 8'h00;
- end
- end
- `WAIT_FF: begin
- txRxByte(8'hff, rxByte);
- if (rxByte == 8'hff) begin
- cnt <= cnt + 1'b1;
- if (cnt == 8'h04) begin
- txRxByte(respByte, rxByte);
- smSt <= `WAIT_FF_FIN;
- end
- end
- else begin
- smSt <= `START;
- cnt <= 8'h00;
- end
- end
- `WAIT_FF_FIN: begin
- txRxByte(8'hff, rxByte);
- if (rxByte == 8'h04) begin
- cnt <= cnt + 1'b1;
- if (cnt == 8'hff) begin
- txRxByte(respByte, rxByte);
- smSt <= `START;
- end
- end
- else
- smSt <= `START;
- end
- endcase
-end
-
-// setRespByte
-task setRespByte;
- input [7:0] dataByte;
- begin
- respByte = dataByte;
- end
-endtask
-
-endmodule
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