diff --git a/src/main/scala/backBoard/BackBoardMst.scala b/src/main/scala/backBoard/BackBoardMst.scala
index ee2a2db..083c43f 100644
--- a/src/main/scala/backBoard/BackBoardMst.scala
+++ b/src/main/scala/backBoard/BackBoardMst.scala
@@ -29,55 +29,67 @@ class BackBoardMstIO extends Bundle{
 }
 
 
-class BackBoardMstBase extends Module{
+class BackBoardMstBase extends RawModule{
   val io: BackBoardMstIO = IO(new BackBoardMstIO)
 
 
-  val fsmcSlv = Module(new FSMCSlv)
-
-  fsmcSlv.io.FSMC <> io.FSMC
-
 
   val lvdsMst = Module(new Lvds_Bus_Master)
+  val mirrorDown = Module(new MirrorSRAM)
+  val mirrorUp = Module(new MirrorSRAM)
+
+  val status  = Reg(UInt(8.W))
+  val slvNum  = Reg(UInt(5.W))
 
 
-
-  val ( cnt, trigger ) = Counter(Range( 0,1023))
-
-
-
-
-
-
-  val status  = RegInit(0.U(8.W))
-  val slvNum  = RegInit(0.U(6.W))
-
-  val mirror = Module(new MirrorSRAM)
-  mirror.io.clock := io.ides_pclk.asBool
-  mirror.io.reset := io.reset.asBool
-
+  mirrorDown.io.clock := io.ides_pclk.asBool
+  mirrorDown.io.reset := io.reset.asBool
+  mirrorUp.io.clock := io.ides_pclk.asBool
+  mirrorUp.io.reset := io.reset.asBool
 }
 
 
 
 
-
 trait BackBoardMstFSMC{ this: BackBoardMstBase =>
 
-  val fsmcAddrSync   = ShiftRegister( io.FSMC.addr,   2, 0.U, true.B )
-  val fsmcdataInSync = ShiftRegister( io.FSMC.dataIn, 2, 0.U, true.B )
-  val fsmcCEnSync    = ShiftRegister( io.FSMC.cen,    2, true.B, true.B )
-  val fsmcOEnSync    = ShiftRegister( io.FSMC.oen,    2, true.B, true.B )
-  val fsmcWEnSync    = ShiftRegister( io.FSMC.wen,    2, true.B, true.B )
+  withClockAndReset( io.ides_pclk.asClock, io.reset ){
+    val fsmcAddrSync   = ShiftRegister( io.FSMC.addr,   2, 0.U, true.B )
+    val fsmcdataInSync = ShiftRegister( io.FSMC.dataIn, 2, 0.U, true.B )
+    val fsmcCEnSync    = ShiftRegister( io.FSMC.cen,    2, true.B, true.B )
+    val fsmcOEnSync    = ShiftRegister( io.FSMC.oen,    2, true.B, true.B )
+    val fsmcWEnSync    = ShiftRegister( io.FSMC.wen,    2, true.B, true.B )
 
-  io.FSMC.dataOEn := io.FSMC.oen
+    io.FSMC.dataOEn := io.FSMC.oen
+
+  
+    mirrorDown.io.we    := (~fsmcCEnSync & ~fsmcAddrSync.extract(12) & fsmcAddrSync.extract(11) & (~fsmcWEnSync) )
+    mirrorDown.io.addrw  := fsmcAddrSync(10,0)
+    mirrorDown.io.dataw := fsmcdataInSync
+
+    
+    // mirrorUp.io.ce    := (~fsmcCEnSync & ~fsmcAddrSync.extract(12) & ~fsmcAddrSync.extract(11) & (~fsmcOEnSync) )
+    mirrorUp.io.addrr  := fsmcAddrSync(10,0)
+
+    val regOut = Wire(UInt(8.W))
 
 
-  io.FSMC.dataOut   := mirror.io.datar_a
-  mirror.io.ce_a    := (~fsmcCEnSync & ~fsmcAddrSync.extract(11) & (~fsmcOEnSync | ~fsmcWEnSync) )
-  mirror.io.we_a    := ~fsmcWEnSync
-  mirror.io.addr_a  := fsmcAddrSync(10,0)
-  mirror.io.dataw_a := fsmcdataInSync
+    io.FSMC.dataOut   := Mux( fsmcAddrSync.extract(12), regOut, mirrorUp.io.datar)
+
+    regOut := Mux1H(Seq(
+      (fsmcAddrSync(10,0) === 0.U) -> status,
+      (fsmcAddrSync(10,0) === 1.U) -> slvNum,
+    ))
+
+    when( (~fsmcCEnSync & fsmcAddrSync.extract(12) & (~fsmcWEnSync) ) & (fsmcAddrSync(10,0) === 0.U) ){
+      status := fsmcdataInSync
+    }
+
+    when( (~fsmcCEnSync & fsmcAddrSync.extract(12) & (~fsmcWEnSync) ) & (fsmcAddrSync(10,0) === 1.U) ){
+      slvNum := fsmcdataInSync
+    }
+
+  }
 
 }
 
@@ -94,29 +106,114 @@ trait BackBoardMstLVDS{ this: BackBoardMstBase =>
   
   lvdsMst.io.tx_start := false.B
 
-  
-  .elsewhen( cnt === 0.U ){
+
+
+  withClockAndReset( io.ides_pclk.asClock, io.reset ){
+
+    val stateCur = RegInit(0.U(3.W))
+    val ( cnt, trigger ) = Counter(Range( 0,1023))
+
+    val addrr = RegInit(0.U)
+    val addrw = RegInit(0.U)
+
+    when( trigger ){
+      stateCur := 0.U
+
+      addrr := 0.U
+      addrw := 0.U
+
+      lvdsMst.io.frame_info_update_en := true.B
+      lvdsMst.io.slave_type_num       := Cat( "b000".U(3.W), slvNum )
+      lvdsMst.io.slave_data_length    := (8/8*4*8-1).U
+
+      lvdsMst.io.tx_start := false.B
+    } .elsewhen( stateCur === 0.U ){
+      stateCur := 1.U
+
+      lvdsMst.io.frame_info_update_en := false.B
+      lvdsMst.io.slave_type_num       := 0.U
+      lvdsMst.io.slave_data_length    := 0.U
+
+      lvdsMst.io.tx_start := true.B
+
+    } .elsewhen( stateCur === 1.U ){
+      lvdsMst.io.frame_info_update_en := false.B
+      lvdsMst.io.slave_type_num       := 0.U
+      lvdsMst.io.slave_data_length    := 0.U
+
+      lvdsMst.io.tx_start := false.B
+
+      when( RegNext(lvdsMst.io.downstream_busy, false.B) & ~lvdsMst.io.downstream_busy ){
+        stateCur := 2.U
+      }
+
+    } .elsewhen( stateCur === 2.U ){
+      stateCur := 3.U
+
+      lvdsMst.io.frame_info_update_en := true.B
+      lvdsMst.io.slave_type_num       := Cat( "b10".U(2.W), 0.U(6.W) )
+      lvdsMst.io.slave_data_length    := 0.U
+      lvdsMst.io.tx_start := false.B
+      addrr := 0.U
+      addrw := 0.U
+
+    } .elsewhen( stateCur === 3.U ){
+
+      lvdsMst.io.frame_info_update_en := false.B
+      lvdsMst.io.slave_type_num       := 0.U
+      lvdsMst.io.slave_data_length    := 0.U
+      lvdsMst.io.tx_start := true.B
+
+    } .elsewhen( stateCur === 4.U ){
+
+      lvdsMst.io.frame_info_update_en := false.B
+      lvdsMst.io.slave_type_num       := 0.U
+      lvdsMst.io.slave_data_length    := 0.U
+
+      lvdsMst.io.tx_start := false.B
+
+      when( lvdsMst.io.tx_data_ready ){
+        addrr := addrr + 1.U
+      }
+      when( RegNext(lvdsMst.io.downstream_busy, false.B) & ~lvdsMst.io.downstream_busy ){
+        stateCur := 5.U
+      }
+    } .elsewhen( stateCur === 5.U ){
+      lvdsMst.io.frame_info_update_en := false.B
+      lvdsMst.io.slave_type_num       := 0.U
+      lvdsMst.io.slave_data_length    := 0.U
+
+      lvdsMst.io.tx_start := false.B
+
+    } .otherwise{
+
+      lvdsMst.io.frame_info_update_en := false.B
+      lvdsMst.io.slave_type_num       := 0.U
+      lvdsMst.io.slave_data_length    := 0.U
+
+      lvdsMst.io.tx_start := false.B
+
+      assert(false.B)
+    }
+
+    when( lvdsMst.io.rx_data_valid ){
+      assert( (stateCur === 4.U) || (stateCur === 5.U) )
+      addrw := addrw + 1.U
+    }
+
+    lvdsMst.io.tx_data_in := mirrorDown.io.datar
+    mirrorDown.io.addrr := addrr
     
-  } .elsewhen( cnt === 1.U ){
-    lvdsMst.io.tx_start := true.B
+    mirrorUp.io.we    := lvdsMst.io.rx_data_valid
+    mirrorUp.io.dataw := lvdsMst.io.rx_data_out
+    mirrorUp.io.addrw := addrw
+
+
   }
 
 
-  lvdsMst.io.frame_info_update_en := (cnt === 0.U)
-  lvdsMst.io.slave_type_num       := Cat( "b00".U(2.W), slvNum )
-  lvdsMst.io.slave_data_length    := (8/8*4*8-1).U
 
 
-  lvdsMst.io.tx_start             = Input(Bool())
-  lvdsMst.io.tx_data_in           = Input(UInt(8.W))
-  lvdsMst.io.tx_data_ready        = Output(Bool())
-  lvdsMst.io.downstream_busy      = Output(Bool())
 
-  lvdsMst.io.rx_data_out          = Output(UInt(8.W))
-  lvdsMst.io.rx_data_valid        = Output(Bool())
 
-  lvdsMst.io.upstream_crc_valid     = Output(Bool())
-  lvdsMst.io.upstream_crc_err       = Output(Bool())
-  lvdsMst.io.upstream_crc_err_count = Output(UInt(8.W))
-  lvdsMst.io.upstream_cdr_err       = Output(Bool())
 }
diff --git a/src/main/scala/backBoard/BackBoardSlv.scala b/src/main/scala/backBoard/BackBoardSlv.scala
new file mode 100644
index 0000000..5010659
--- /dev/null
+++ b/src/main/scala/backBoard/BackBoardSlv.scala
@@ -0,0 +1,139 @@
+package BACK
+
+import chisel3._
+import chisel3.util._
+
+
+
+class BackBoardSlvIO extends Bundle{
+  val reset     = Input(Bool())
+  val oser_pclk = Input(Bool())
+  val oser_fclk = Input(Bool())
+  val ides_pclk = Input(Bool())
+  val ides_fclk = Input(Bool())
+
+  val lvds_down_din  = Input(Bool())
+  val lvds_down_dout = Output(Bool())
+  val lvds_up_din    = Input(Bool())
+  val lvds_up_dout   = Output(Bool())
+}
+
+
+abstract class BackBoardSlvBase extends RawModule{
+  val io: BackBoardSlvIO = IO(new BackBoardSlvIO)
+
+  val lvdsSlv = Module(new Lvds_Bus_Slave)
+
+  lvdsSlv.io.rst_n     := ~io.reset    
+  lvdsSlv.io.oser_pclk := io.oser_pclk
+  lvdsSlv.io.oser_fclk := io.oser_fclk
+  lvdsSlv.io.ides_pclk := io.ides_pclk
+  lvdsSlv.io.ides_fclk := io.ides_fclk
+  
+
+  lvdsSlv.io.lvds_down_din  := io.lvds_down_din 
+  lvdsSlv.io.lvds_down_dout := io.lvds_down_dout
+  lvdsSlv.io.lvds_up_din    := io.lvds_up_din   
+  lvdsSlv.io.lvds_up_dout   := io.lvds_up_dout  
+    
+  val downReg = Reg(Vec(32, UInt(8.W)))
+  val upReg   = Reg(Vec(32, UInt(8.W)))
+
+
+
+
+  // val downstream_rx_data_valid = Output(Bool())
+  // val downstream_rx_data_out   = Output(UInt(8.W))
+  // val downstream_rx_crc_valid  = Output(Bool())
+  // val downstream_rx_crc_err = Output(Bool())
+  // val downstream_rx_crc_err_counter = Output(UInt(8.W))
+  // val downstream_rx_cdr_err = Output(Bool())
+  // val downstream_sync = Output(Bool())
+
+  val upstream_tx_data_ready = Output(Bool())
+  val upstream_tx_data_in = Input(UInt(8.W))
+
+  // val upstream_rx_crc_valid = Output(Bool())
+  // val upstream_rx_crc_err = Output(Bool())
+  // val upstream_rx_crc_err_counter = Output(UInt(8.W))
+  // val upstream_rx_cdr_err = Output(Bool())
+}
+
+
+trait BackBoardSlvDown{ this: BackBoardSlvBase =>
+
+  withClockAndReset( io.ides_pclk.asClock, io.reset ){
+    val downCnt = RegInit(0.U(6.W))
+    val downTimeoutEn  = RegInit( false.B )
+    val downTimeoutRst = (downCnt === 0.U & downstream_rx_data_valid)
+    val ( _, downTimeout ) = Counter( Range( 0,1023 ), downTimeoutEn, downTimeoutRst )
+
+
+    when( io.reset ){
+      for( i <- 0 until 32 ){
+        downReg(i) := 0.U
+      }
+    } .otherwise{
+      when( downstream_rx_data_valid ){
+        downReg(downCnt) := downstream_rx_data_out
+      }
+    }
+
+    when( downTimeout ){
+      downTimeoutEn := false.B
+    } .elsewhen( downCnt === 32.U ){
+      downTimeoutEn := false.B
+    } .elsewhen(downCnt === 0.U & downstream_rx_data_valid){
+      downTimeoutEn := true.B
+    }
+
+    when( downTimeout ){
+      downCnt := 0.U
+    }.elsewhen( downCnt === 32.U ){
+      downCnt := 0.U
+    }.elsewhen( downstream_rx_data_valid ){
+      downCnt := downCnt + 1.U
+    }
+
+  }
+}
+
+trait BackBoardSlvUp{ this: BackBoardSlvBase =>
+
+  withClockAndReset( io.ides_pclk.asClock, io.reset ){
+    val upCnt = RegInit(0.U(6.W))
+    val upTimeoutEn  = RegInit( false.B )
+    val upTimeoutRst = (upCnt === 0.U & upstream_tx_data_ready)
+    val ( _, upTimeout ) = Counter( Range( 0,1023 ), upTimeoutEn, upTimeoutRst )
+
+      // when( upstream_tx_data_ready ){
+      //   upstream_tx_data_ready := upReg(upCnt)
+      // }
+
+    when( io.reset ){
+      for( i <- 0 until 32 ){
+        upReg(i) := 0.U
+      }
+    } .otherwise{
+
+    }
+
+    when( upTimeout ){
+      upTimeoutEn := false.B
+    } .elsewhen( upCnt === 32.U ){
+      upTimeoutEn := false.B
+    } .elsewhen(upCnt === 0.U & upstream_tx_data_ready){
+      upTimeoutEn := true.B
+    }
+
+    when( upTimeout ){
+      upCnt := 0.U
+    }.elsewhen( upCnt === 32.U ){
+      upCnt := 0.U
+    }.elsewhen( upstream_tx_data_ready ){
+      upCnt := upCnt + 1.U
+    }
+
+  }
+}
+
diff --git a/src/main/scala/backBoard/MirrorSRAM.scala b/src/main/scala/backBoard/MirrorSRAM.scala
index 6f1bed9..89941a7 100644
--- a/src/main/scala/backBoard/MirrorSRAM.scala
+++ b/src/main/scala/backBoard/MirrorSRAM.scala
@@ -6,92 +6,85 @@ import chisel3.util._
 
 
 
+
+
+
+
+
 class MirrorSRAMIO extends Bundle{
+  val datar = Output(UInt(8.W))
+  val dataw = Input(UInt(8.W))
+  val clock = Input(Bool())
+  val reset = Input(Bool())
+  val we = Input(Bool())
+  val addrr = Input(UInt(11.W))
+  val addrw = Input(UInt(11.W))
 
-  val datar_a = Output(UInt(8.W))
-  val datar_b = Output(UInt(8.W))
 
-  val clk_a = Input(Bool())
-  val clk_b = Input(Bool())
+  // val datar_a = Output(UInt(8.W))
+  // val datar_b = Output(UInt(8.W))
 
-  val reset_a = Input(Bool())
-  val reset_b = Input(Bool())
+  // val clk_a = Input(Bool())
+  // val clk_b = Input(Bool())
 
-  val ce_a = Input(Bool())
-  val ce_b = Input(Bool())
+  // val reset_a = Input(Bool())
+  // val reset_b = Input(Bool())
 
-  val we_a = Input(Bool())
-  val we_b = Input(Bool())
+  // val ce_a = Input(Bool())
+  // val ce_b = Input(Bool())
 
-  val addr_a = Input(UInt(11.W))
-  val addr_b = Input(UInt(11.W))
+  // val we_a = Input(Bool())
+  // val we_b = Input(Bool())
 
-  val dataw_a = Input(UInt(8.W))
-  val dataw_b = Input(UInt(8.W))
+  // val addr_a = Input(UInt(11.W))
+  // val addr_b = Input(UInt(11.W))
+
+  // val dataw_a = Input(UInt(8.W))
+  // val dataw_b = Input(UInt(8.W))
 }
 
 class MirrorSRAM extends BlackBox with HasBlackBoxInline {
 
-  val io: MirrorSRAM = IO(new MirrorSRAM)
+  val io: MirrorSRAMIO = IO(new MirrorSRAMIO)
 
   setInline("lvds_bus_master.v",
               """
   |   module MirrorSRAM(
-  |      output [7:0] datar_a,
-  |      output [7:0] datar_b,
+  |      output [7:0] datar,
+  |      input  [7:0] dataw,
   |
   |      input clock,
   |      input reset,
   |
-  |      input ce_a,
-  |      input ce_b,
+  |      input we,
   |
-  |      input we_a,
-  |      input we_b,
+  |      input [11:0] addrw,
+  |      input [11:0] addrr
   |
-  |      input [10:0] addr_a,
-  |      input [10:0] addr_b,
-  |
-  |      input [7:0] dataw_a
-  |      input [7:0] dataw_b
   |   );
   |
-  |   wire [15:0] doa; 
-  |   wire [15:0] dob; 
+  |   wire [31:0] dout; 
+  |   assign datar = dout[7:0];
   |
-
   |
-  |   assign datar_a = doa[7:0];
-  |   assign datar_b = dob[7:0];
-  |
-  |   DPB bram_dpb_0 (
-  |      .DOA(doa),
-  |      .DOB(dob),
-  |      .CLKA(clock),
-  |      .OCEA(1'b1),
-  |      .CEA(ce_a),
-  |      .RESETA(reset),
-  |      .WREA(we_a),
-  |      .CLKB(clock),
-  |      .OCEB(1'b1),
-  |      .CEB(ce_b),
-  |      .RESETB(reset),
-  |      .WREB( we_b ),
-  |      .BLKSELA(3'b0),
-  |      .BLKSELB(3'b0),
-  |      .ADA({addr_a[10:0],3'b000}),
-  |      .DIA({8'b0,dataw_a}),
-  |      .ADB({addr_b[10:0],3'b000}),
-  |      .DIB({8'b0,dataw_b})
-  |      );
-  |
-  |      defparam bram_dpb_0.READ_MODE0 = 1'b0;
-  |      defparam bram_dpb_0.READ_MODE1 = 1'b0;
-  |      defparam bram_dpb_0.WRITE_MODE0 = 2'b00;
-  |      defparam bram_dpb_0.WRITE_MODE1 = 2'b00;
-  |      defparam bram_dpb_0.BIT_WIDTH_0 = 8;
-  |      defparam bram_dpb_0.BIT_WIDTH_1 = 8;
-  |      defparam bram_dpb_0.RESET_MODE = "SYNC";
+  |SDPB bram_sdpb_0 (
+  |  .DO({dout[31:8],dout[7:0]}),
+  |  .CLKA(clock),
+  |  .CEA(we),
+  |  .RESETA(reset),
+  |  .CLKB(clock),
+  |  .CEB(1'b1),
+  |  .RESETB(reset),
+  |  .OCE(1'b1),
+  |  .BLKSELA(3'b0),
+  |  .BLKSELB(3'b0),
+  |  .ADA({addrw,3'b0}),
+  |  .DI({24'b0, dataw}),
+  |  .ADB({addrr,3'b0})
+  |  );
+  |  defparam bram_sdpb_0.BIT_WIDTH_0 = 8;
+  |  defparam bram_sdpb_0.BIT_WIDTH_1 = 8;
+  |  defparam bram_sdpb_0.RESET_MODE = "SYNC";
   |
   | );
   |endmodule
diff --git a/src/main/scala/backBoard/goWinBus.scala b/src/main/scala/backBoard/goWinBus.scala
index 7a695f3..1c7f95c 100644
--- a/src/main/scala/backBoard/goWinBus.scala
+++ b/src/main/scala/backBoard/goWinBus.scala
@@ -108,7 +108,7 @@ class Lvds_Bus_SlaveIO extends Bundle{
   val lvds_up_dout   = Output(Bool())
     
   val downstream_rx_data_valid = Output(Bool())
-  val downstream_rx_data_out   = Ouyput(UInt(8.W))
+  val downstream_rx_data_out   = Output(UInt(8.W))
   val downstream_rx_crc_valid  = Output(Bool())
   val downstream_rx_crc_err = Output(Bool())
   val downstream_rx_crc_err_counter = Output(UInt(8.W))
diff --git a/src/main/scala/backBoard/FSMC.scala b/src/main/scala/backBoard/trush/FSMC.scala.bk
similarity index 100%
rename from src/main/scala/backBoard/FSMC.scala
rename to src/main/scala/backBoard/trush/FSMC.scala.bk