高云FPGA：从站增加0.5s看门狗

src/main/scala/backBoard/LocalRegisters.scala

@@ -28,7 +28,7 @@ abstract class BackBoardSlvLocal extends BackBoardSlvBase with BackBoardSlvDown
   val statusPage = RegEnable( downRegTemp(0)(3,0), 15.U, isCrcPass )
   val statusP    = RegInit(false.B)
   val statusRF   = RegInit(false.B)
-  val statusPR   = RegEnable( Cat( downRegTemp(1).extract(0), downRegTemp(0).extract(7) ), 0.U, isCrcPass )
+  val statusPR   = RegInit(0.U(2.W))
   val statusER   = RegInit(false.B)
   val statusLE   = RegInit(false.B)
   val statusSync = RegEnable( downRegTemp(1).extract(3).asBool, false.B, isCrcPass )
@@ -111,6 +111,21 @@ trait BackBoardSlvStatusPR { this: BackBoardSlvLocal =>
               Mux( statusPR === "b01".U, flash1HZ, 
                 Mux( statusPR === "b10".U, false.B, true.B
                   )))
+
+
+  val watchDogTarget = RegInit( 0.U( 19.W ) )
+
+  when( isCrcPass ){
+    watchDogTarget := flashCounter
+  }
+
+  when( isCrcPass ){
+    statusPR := Cat( downRegTemp(1).extract(0), downRegTemp(0).extract(7) )
+  } .elsewhen( ((watchDogTarget === (flashCounter + 1.U)) | (watchDogTarget === 0.U & (flashCounter >= 500000.U))) & usTrigger ){
+    statusPR := 0.U
+  }
+
+
 }