From 8c414cebc781c6776b66819ab48598d33a21c689 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Mon, 3 Apr 2017 00:11:08 +0800
Subject: [PATCH] drtio: report busy errors

---
 artiq/gateware/drtio/rt_ios_satellite.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/artiq/gateware/drtio/rt_ios_satellite.py b/artiq/gateware/drtio/rt_ios_satellite.py
index 79cd0b72b..74e7cb80c 100644
--- a/artiq/gateware/drtio/rt_ios_satellite.py
+++ b/artiq/gateware/drtio/rt_ios_satellite.py
@@ -112,6 +112,8 @@ class IOS(Module):
         if fine_ts_width:
             self.sync.rio += interface.fine_ts.eq(fifo_out.timestamp[:fine_ts_width])
 
+        self.sync.rio += If(interface.stb & interface.busy, self.busy.eq(1))
+
     def add_input(self, n, channel):
         rt_packet = self.rt_packet