cxp upconn: add reset & tx_busy

src/gateware/cxp_upconn.py

@@ -15,6 +15,7 @@ IDLE_CHARS = Array([
     [0xB5, 0], #D21.5
 ])
 
+@ResetInserter()
 class UpConn_ClockGen(Module):
     def __init__(self, sys_clk_freq):
         self.clk = Signal()
@@ -55,6 +56,8 @@ class UpConn_ClockGen(Module):
 
         ]
 
+@ResetInserter()
+@CEInserter()
 class SERDES_10bits(Module):
     def __init__(self, pad):
         self.oe = Signal()
@@ -89,6 +92,8 @@ class SERDES_10bits(Module):
             )
         ]
 
+@ResetInserter()
+@CEInserter()
 class Packets_Scheduler(Module):
     def __init__(self, tx_fifos):
         self.tx_enable = Signal()
@@ -182,14 +187,13 @@ class TxFIFOs(Module):
 
         self.sink = []
 
+        self.source_stb = Signal(nfifos)
         self.source_ack = Array(Signal() for _ in range(nfifos))
         self.source_data = Array(Signal(8) for _ in range(nfifos))
         self.source_k = Array(Signal() for _ in range(nfifos))
 
         # # #
 
-        data_available = Signal(nfifos)
-
         for i in range(nfifos):
             fifo = stream.SyncFIFO(cxp_phy_layout, fifo_depth)
             setattr(self.submodules, "tx_fifo" + str(i), fifo)
@@ -206,34 +210,42 @@ class TxFIFOs(Module):
                     fifo.source.ack.eq(0),
                 ),
 
-                data_available[i].eq(fifo.source.stb),
+                self.source_stb[i].eq(fifo.source.stb),
                 self.source_data[i].eq(fifo.source.data),
                 self.source_k[i].eq(fifo.source.k),
             ]
 
         # FIFOs transmission priority
         self.submodules.pe = PriorityEncoder(nfifos)
-        self.comb += self.pe.i.eq(data_available)
+        self.comb += self.pe.i.eq(self.source_stb)
 
 class CXP_UpConn(Module):
     def __init__(self, pad, sys_clk_freq, debug_sma, pmod_pads, cxp_phy_layout, fifo_depth, nfifos=3):
         self.bitrate2x_enable = Signal()
+        self.clk_reset = Signal()
+
         self.tx_enable = Signal()
+        self.tx_busy = Signal()
 
         # # #
 
         self.submodules.cg = cg = UpConn_ClockGen(sys_clk_freq)
         self.submodules.tx_fifos = tx_fifos = TxFIFOs(cxp_phy_layout, nfifos, fifo_depth)
 
-        self.submodules.scheduler = scheduler = CEInserter()(Packets_Scheduler(tx_fifos))
-        self.submodules.serdes = serdes = CEInserter()(SERDES_10bits(pad))
+        self.submodules.scheduler = scheduler = Packets_Scheduler(tx_fifos)
+        self.submodules.serdes = serdes = SERDES_10bits(pad)
 
         self.comb += [
+            self.tx_busy.eq(tx_fifos.source_stb != 0),
+
+            cg.reset.eq(self.clk_reset),
             cg.freq2x_enable.eq(self.bitrate2x_enable),
 
+            scheduler.reset.eq(self.clk_reset),
             scheduler.ce.eq(cg.clk),
             scheduler.tx_enable.eq(self.tx_enable),
 
+            serdes.reset.eq(self.clk_reset),
             serdes.ce.eq(cg.clk_10x),
             serdes.d.eq(scheduler.encoder.output),
             serdes.oe.eq(scheduler.oe),