SPI时序调整

tb/shinTest/ShinTopSpiTb.v

@@ -262,12 +262,14 @@ end
 
   reg [7:0] txBuf[0:2047];
   reg [7:0] rxBuf[0:2047];
-  reg [7:0] exChangeReg;
+  reg [7:0] exChangeRego;
+  reg [7:0] exChangeRegi;
 
 
 
-  assign spi_mosi = exChangeReg[7];
-  assign qspi_mosi = exChangeReg[7:4];
+  assign spi_mosi = exChangeRego[7];
+  assign qspi_mosi = exChangeRego[7:4];
+
   wire [3:0] qspi_mux_miso = 
     ( qspi_miso[4*0+3:4*0] & ~{4{spi_csn[ 0]}}) |
     ( qspi_miso[4*1+3:4*1] & ~{4{spi_csn[ 1]}}) |
@@ -307,7 +309,7 @@ always @(posedge clock) begin
     bitCnt  <= #5 ~3'b0;
 
     spi_csn[idx] <= #5 1'b0;
-    exChangeReg <= txBuf[0];
+    exChangeRego <= txBuf[0];
   end
 end
 
@@ -315,6 +317,24 @@ end
 wire isQspi  = (idx >= 0 && idx <= 4) || idx >= 10;
 wire [11:0] nextByteCnt = byteCnt +1;
 
+//输出
+always @(negedge sck) begin
+  if( isBusy ) begin      
+    if( &bitCnt ) begin
+      if( txBuf[2] === 1 & nextByteCnt >= 3) begin
+        exChangeRego <= isQspi ? exChangeRego << 4 : exChangeRego << 1;
+      end else begin
+        exChangeRego <= txBuf[nextByteCnt];
+      end
+    end else begin
+      if( isQspi ) begin
+        exChangeRego <= isQspi ? exChangeRego << 4 : exChangeRego << 1;
+      end
+    end
+  end
+end
+
+//输入
 always @(posedge sck) begin
   if( isBusy ) begin
     if( transCnt <= length ) begin
@@ -327,20 +347,18 @@ always @(posedge sck) begin
       if( &bitCnt ) begin
         byteCnt <= byteCnt +1;
         transCnt <= transCnt + 1;
-        rxBuf[byteCnt] <= isQspi ? {exChangeReg[3:0], qspi_mux_miso} : {exChangeReg[6:0], spi_mux_miso};
+        rxBuf[byteCnt] <= isQspi ? {exChangeRegi[3:0], qspi_mux_miso} : {exChangeRegi[6:0], spi_mux_miso};
         if( txBuf[2] === 1 & nextByteCnt >= 4) begin
-          $display("spi read out @ %x", exChangeReg);
+          $display("spi read out %x", exChangeRegi);
         end
         if( txBuf[2] === 1 & nextByteCnt >= 3) begin
-          exChangeReg <= isQspi ? {exChangeReg[3:0], qspi_mux_miso} : {exChangeReg[6:0], spi_mux_miso};
+          exChangeRegi <= isQspi ? {exChangeRegi[3:0], qspi_mux_miso} : {exChangeRegi[6:0], spi_mux_miso};
         end else begin
-          exChangeReg <= txBuf[nextByteCnt];
+          exChangeRegi <= 0;
         end
       end else begin
         if( isQspi ) begin
-          exChangeReg <= {exChangeReg[3:0], qspi_mux_miso};
-        end else begin
-          exChangeReg <= {exChangeReg[6:0], spi_mux_miso};
+          exChangeRegi <= isQspi ? {exChangeRegi[3:0], qspi_mux_miso} : {exChangeRegi[6:0], spi_mux_miso};
         end
 
       end
@@ -353,8 +371,6 @@ end
 
 
 
-
-
 task spi_trans( input [15:0] saddress, input [7:0] scmd, input [12:0] slength,input [7:0] sidx );
   begin
     txBuf[0] <= saddress[7:0];
@@ -482,8 +498,11 @@ initial begin
 
 
   //测试
-
-  spi_trans( (16'hc0), (`SPI_READ), (6), (3) );//发送SM0 接收SM0, 请求发送
+  spi_trans( (16'hc0), (`SPI_READ), (6), (3) );
+  spi_trans( (16'h0a), (`SPI_READ), (2), (1) );
+  spi_trans( (16'h0a), (`SPI_READ), (2), (2) );
+  spi_trans( (16'h0a), (`SPI_READ), (2), (3) );
+  spi_trans( (16'h0a), (`SPI_READ), (2), (4) );
 
 
   //读写