修正clk仿真的代码，可以通过测试

tb/shinTest/ShinTopSpiTb_clk.v

@@ -607,7 +607,7 @@ always @(posedge sck) begin
           rxBuf[byteCnt] <= exChangeRegi;
           //$display("spi read out %x", exChangeRegi);
         end
-        if( txBuf[2] === 8'h80 & nextByteCnt >= 4) begin
+        if( txBuf[2] === 8'h80 & nextByteCnt >= 3) begin
           exChangeRegi <= isQspi ? {exChangeRegi[3:0], qspi_mux_miso} : {exChangeRegi[6:0], spi_mux_miso};
         end else begin
           exChangeRegi <= 0;
@@ -627,7 +627,7 @@ end
 
 //mst slv0~slv3的 内部qspi调用即设置
 //sidx为0~4；外部spi为5~9，外部qspi为10~15
-task spi_trans( input [15:0] saddress, input [7:0] scmd, input [12:0] slength,input [16:0] sidx );
+task spi_trans( input [15:0] saddress, input [7:0] scmd, input [12:0] slength, input [16:0] sidx );
   begin
     txBuf[0] <= saddress[15:8];
     txBuf[1] <= saddress[7:0];