修复spicmd没有在每次传输前后复位地问题，或许将导致三态门状态错误

src/main/scala/backBoard/shin/SpiInterface.scala

@@ -44,22 +44,22 @@ abstract class SpiInterfaceBase extends Module with RequireAsyncReset{
   val isSckPosedge     = ~shiftSCK(2) & shiftSCK(1)
   val isSckPosedgeNext = ShiftRegisters(isSckPosedge, 2, false.B, true.B)
 
-  val exRego = Reg(UInt(8.W))
+  val exRego = RegInit(0.U(8.W))
-  val exRegi = Reg(UInt(8.W))
+  val exRegi = RegInit(0.U(8.W))
 
 
 
-  val addrw = RegInit(0.U(16.W))
+  val addrw  = RegInit(0.U(16.W))
-  val addrr = RegInit(0.U(16.W))
+  val addrr  = RegInit(0.U(16.W))
-  val spiCmd  = Reg(UInt(1.W))
+  val spiCmd = RegInit(0.U(1.W))
 
   val isSpiWrite = spiCmd === 0.U
   val isSpiRead  = spiCmd === 1.U
 
-  val bitSel  = Reg(UInt(3.W))
+  val bitSel  = RegInit(0.U(3.W))
-  val bitSelNext = RegNext(bitSel)
+  val bitSelNext = RegNext(bitSel, 0.U(3.W))
-  val byteSel = Reg(UInt(12.W))
+  val byteSel = RegInit(0.U(12.W))
-  val byteSelNext = RegNext(byteSel)
+  val byteSelNext = RegNext(byteSel, 0.U(12.W))
 
 
   io.isEnW := isSckPosedgeNext(0) & ~shiftCSn(1) & bitSelNext.andR & isSpiWrite & byteSelNext >= 3.U
@@ -93,7 +93,7 @@ abstract class SpiInterfaceBase extends Module with RequireAsyncReset{
 
 class SSpiInterface extends SpiInterfaceBase{
   val spi = IO(new SSPIInterfaceIO)
-  val shiftMOSI = ShiftRegisters(spi.mosi, 3)
+  val shiftMOSI = ShiftRegisters(spi.mosi, 3, false.B, true.B)
 
   sck     := spi.sck
   csn     := spi.csn
@@ -103,7 +103,9 @@ class SSpiInterface extends SpiInterfaceBase{
              (isSckPosedgeNext(0) & ~shiftCSn(1) & bitSelNext === 0.U & shiftMOSI(1) === 1.U & byteSelNext === 2.U ) |
              (isSckPosedgeNext(0) & ~shiftCSn(1) & bitSelNext === 0.U & isSpiRead & byteSelNext >= 3.U)
 
-  when( isSckPosedgeNext(0) & ~shiftCSn(1) & byteSelNext === 2.U & bitSelNext === 0.U ){ //CS为低，且SCK上跳的第0byte
+  when( shiftCSn(2) & ~shiftCSn(1) || (~shiftCSn(2) & shiftCSn(1)) ){  //CS下跳或上跳
+    spiCmd := 0.U
+  } .elsewhen( isSckPosedgeNext(0) & ~shiftCSn(1) & byteSelNext === 2.U & bitSelNext === 0.U ){ //CS为低，且SCK上跳的第0byte
     spiCmd := shiftMOSI(1)
   }
 
@@ -111,7 +113,7 @@ class SSpiInterface extends SpiInterfaceBase{
   spi.miso := exRego.extract(7)
 
   when( shiftCSn(2) & ~shiftCSn(1) ){
-    bitSel   := 0.U
+    bitSel := 0.U
   } .elsewhen( isSckPosedge & ~shiftCSn(1)  ){
     bitSel := bitSel + 1.U
   }
@@ -127,7 +129,7 @@ class SSpiInterface extends SpiInterfaceBase{
     }
   }
 
-  //输出在SCK下降沿准备数据
+  //输出在SCK上升沿准备数据
   when( shiftCSn(2) & ~shiftCSn(1) ){  //CS下跳
     exRego := 0.U //第一个byte 地址0
   } .elsewhen( isSckPosedge & ~shiftCSn(1) ){
@@ -167,12 +169,11 @@ class SSpiInterface extends SpiInterfaceBase{
     }
   }
 
-  io.isEnW := isSckPosedgeNext(0) & ~shiftCSn(1) & bitSelNext.andR & isSpiWrite & byteSelNext >= 3.U
 }
 
 class QSpiInterface extends SpiInterfaceBase{
   val qspi = IO(new QSPIInterfaceIO)
-  val shiftMOSI = ShiftRegisters(qspi.mosi, 3)
+  val shiftMOSI = ShiftRegisters(qspi.mosi, 3, 0.U(4.W), true.B)
 
   sck       := qspi.sck
   csn       := qspi.csn
@@ -183,7 +184,9 @@ class QSpiInterface extends SpiInterfaceBase{
              (isSckPosedgeNext(0) & ~shiftCSn(1) & bitSelNext === 0.U & shiftMOSI(2) === "b1000".U & byteSelNext === 2.U ) |
              (isSckPosedgeNext(0) & ~shiftCSn(1) & bitSelNext === 0.U & isSpiRead & byteSelNext >= 3.U)
 
-  when( isSckPosedgeNext(0) & ~shiftCSn(1) & byteSelNext === 2.U & bitSelNext === 0.U ){ //CS为低，且SCK上跳的第0byte
+  when( (shiftCSn(2) & ~shiftCSn(1)) || (~shiftCSn(2) & shiftCSn(1)) ){  //CS下跳或上跳
+    spiCmd := 0.U
+  } .elsewhen( isSckPosedgeNext(0) & ~shiftCSn(1) & byteSelNext === 2.U & bitSelNext === 0.U ){ //CS为低，且SCK上跳的第0byte
     spiCmd := shiftMOSI(2).extract(3)
   }
 
@@ -193,10 +196,6 @@ class QSpiInterface extends SpiInterfaceBase{
     bitSel := ~bitSel
   }
 
-
-
-
-
   //输入看SCK上升沿
   when( isSckPosedge & ~shiftCSn(1) ){
     when( bitSel === 0.U ){
@@ -206,7 +205,7 @@ class QSpiInterface extends SpiInterfaceBase{
     }
   }
 
-  //输出在SCK下降沿准备数据
+  //输出在SCK上升沿准备数据
   when( shiftCSn(2) & ~shiftCSn(1) ){  //CS下跳
     exRego := 0.U //第一个byte 地址0
   } .elsewhen( isSckPosedge & ~shiftCSn(1) ){