From 71921de5bde602b7e65f4a79dffda6a60f3ffe84 Mon Sep 17 00:00:00 2001
From: Robert Jordens <rj@m-labs.hk>
Date: Mon, 4 Jul 2016 12:22:47 +0200
Subject: [PATCH] spi: do not shift when starting a xfer, closes #495

---
 artiq/gateware/spi.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/artiq/gateware/spi.py b/artiq/gateware/spi.py
index e476adbb9..b62782fbf 100644
--- a/artiq/gateware/spi.py
+++ b/artiq/gateware/spi.py
@@ -125,7 +125,7 @@ class SPIMachine(Module):
                     NextState("WAIT"),
                 )
             ).Else(
-                self.reg.shift.eq(1),
+                self.reg.shift.eq(~self.start),
                 NextState("SETUP"),
             )
         )