minimac: add tx start register

diff --git a/milkymist/minimac3/__init__.py b/milkymist/minimac3/__init__.py
index 75c88e31f55a5da42eb532e509cae88766bca85a..fb6b314b4d98da36241de9a23bd3807a03a50dc6 100644 (file)
--- a/milkymist/minimac3/__init__.py
+++ b/milkymist/minimac3/__init__.py
@@ -26,7 +26,8 @@ class MiniMAC:
                self._rx_count_0 = RegisterField("rx_count_0", _count_width, access_bus=READ_ONLY, access_dev=WRITE_ONLY)
                self._rx_count_1 = RegisterField("rx_count_1", _count_width, access_bus=READ_ONLY, access_dev=WRITE_ONLY)
                self._tx_count = RegisterField("tx_count", _count_width, access_dev=READ_WRITE)
-               regs = [self._phy_reset, self._rx_count_0, self._rx_count_1, self._tx_count]
+               self._tx_start = RegisterField("tx_start", access_bus=WRITE_ONLY)
+               regs = [self._phy_reset, self._rx_count_0, self._rx_count_1, self._tx_count, self._tx_start]
                
                self._rx_event_0 = EventSourcePulse()
                self._rx_event_1 = EventSourcePulse()
@@ -78,7 +79,7 @@ class MiniMAC:
                                        ("rx_ready_0", rx_ready_0),
                                        ("rx_ready_1", rx_ready_1),
                                        
-                                       ("tx_start", self._tx_count.re),
+                                       ("tx_start", self._tx_start.re),
                                        ("tx_count", self._tx_count.field.r),
                                        
                                        ("wb_adr_i", self.membus.adr),