drtio: add external TSC to repeater

artiq/gateware/drtio/core.py

@@ -181,13 +181,13 @@ class DRTIOMaster(Module):
 
 
 class DRTIORepeater(Module):
-    def __init__(self, chanif):
+    def __init__(self, tsc, chanif):
         self.submodules.link_layer = link_layer.LinkLayer(
             chanif.encoder, chanif.decoders)
         self.comb += self.link_layer.rx_ready.eq(chanif.rx_ready)
 
         self.submodules.link_stats = link_layer.LinkLayerStats(self.link_layer, "rtio_rx")
-        self.submodules.rt_packet = rt_packet_repeater.RTPacketRepeater(self.link_layer)
+        self.submodules.rt_packet = rt_packet_repeater.RTPacketRepeater(tsc, self.link_layer)
 
         self.submodules.aux_controller = aux_controller.AuxController(
             self.link_layer)

artiq/gateware/drtio/rt_packet_repeater.py

@@ -9,7 +9,7 @@ from artiq.gateware.drtio.rt_serializer import *
 
 
 class RTPacketRepeater(Module):
-    def __init__(self, link_layer):
+    def __init__(self, tsc, link_layer):
         # CRI target interface in rtio domain
         self.cri = cri.Interface()
 
@@ -24,7 +24,6 @@ class RTPacketRepeater(Module):
         # set_time interface, in rtio domain
         self.set_time_stb = Signal()
         self.set_time_ack = Signal()
-        self.tsc_value = Signal(64)
 
         # # #
 
@@ -44,7 +43,7 @@ class RTPacketRepeater(Module):
         # TSC sync
         tsc_value = Signal(64)
         tsc_value_load = Signal()
-        self.sync.rtio += If(tsc_value_load, tsc_value.eq(self.tsc_value))
+        self.sync.rtio += If(tsc_value_load, tsc_value.eq(tsc.coarse_ts))
 
         # Write buffer and extra data count
         wb_timestamp = Signal(64)

artiq/gateware/test/drtio/test_rt_packet_repeater.py

@@ -11,20 +11,23 @@ from artiq.gateware.drtio.rt_packet_repeater import RTPacketRepeater
 def create_dut(nwords):
     pt = PacketInterface("s2m", nwords*8)
     pr = PacketInterface("m2s", nwords*8)
+    ts = Signal(64)
     dut = ClockDomainsRenamer({"rtio": "sys", "rtio_rx": "sys"})(
-        RTPacketRepeater(SimpleNamespace(
+        RTPacketRepeater(
+            SimpleNamespace(coarse_ts=ts),
+            SimpleNamespace(
                 rx_rt_frame=pt.frame, rx_rt_data=pt.data,
                 tx_rt_frame=pr.frame, tx_rt_data=pr.data)))
-    return pt, pr, dut
+    return pt, pr, ts, dut
 
 
 class TestRepeater(unittest.TestCase):
     def test_set_time(self):
         nwords = 2
-        pt, pr, dut = create_dut(nwords)
+        pt, pr, ts, dut = create_dut(nwords)
 
         def send():
-            yield dut.tsc_value.eq(0x12345678)
+            yield ts.eq(0x12345678)
             yield dut.set_time_stb.eq(1)
             while not (yield dut.set_time_ack):
                 yield
@@ -55,7 +58,7 @@ class TestRepeater(unittest.TestCase):
         ]
 
         for nwords in range(1, 8):
-            pt, pr, dut = create_dut(nwords)
+            pt, pr, ts, dut = create_dut(nwords)
 
             def send():
                 for channel, timestamp, address, data in test_writes:
@@ -89,7 +92,7 @@ class TestRepeater(unittest.TestCase):
 
     def test_buffer_space(self):
         for nwords in range(1, 8):
-            pt, pr, dut = create_dut(nwords)
+            pt, pr, ts, dut = create_dut(nwords)
 
             def send_requests():
                 for i in range(10):