From 3ce6b565eff9b04c9e1a6912de7c2acff958dcae Mon Sep 17 00:00:00 2001
From: Grigori Goronzy <greg@chown.ath.cx>
Date: Fri, 16 Jun 2017 09:47:12 +0200
Subject: [PATCH] Possible fix/workaround for OSX frequency trimming

---
 stcgal/protocols.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/stcgal/protocols.py b/stcgal/protocols.py
index 316eb02..39b008c 100644
--- a/stcgal/protocols.py
+++ b/stcgal/protocols.py
@@ -114,7 +114,11 @@ def read_packet(self):
 
         # read and check frame start magic
         packet = bytes()
-        packet += self.read_bytes_safe(1)
+        # XXX: skip extraneous 0xFE byte?
+        leading = self.read_bytes_safe(1)
+        if leading == 0xfe:
+            leading = self.read_bytes_safe(1)
+        packet += leading
         # Some (?) BSL versions don't send a frame start with the status
         # packet. Let's be liberal and accept that always, just in case.
         if packet[0] == self.PACKET_MCU[0]: