From ed97f378ff701c3a102758fed20f9bb845a71a5f Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Tue, 2 Dec 2014 20:02:43 +0100
Subject: [PATCH] link: add CRC check to BFM

---
 lib/sata/link/test/bfm.py | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/sata/link/test/bfm.py b/lib/sata/link/test/bfm.py
index db276c0f1..7587f489a 100644
--- a/lib/sata/link/test/bfm.py
+++ b/lib/sata/link/test/bfm.py
@@ -102,8 +102,18 @@ class BFM(Module):
 		return p
 
 	def check_crc(self, packet):
-		# Todo from C Code or Python Code
-		return packet[:-1]
+		stdin = ""
+		for v in packet[:-1]:
+			stdin += "0x%08x " %v
+		stdin += "exit"
+		with subprocess.Popen("./crc", stdin=subprocess.PIPE, stdout=subprocess.PIPE) as process:
+			process.stdin.write(stdin.encode("ASCII"))
+			out, err = process.communicate()
+		crc = int(out.decode("ASCII"), 16)
+		if packet[-1] != crc:
+			return []
+		else:
+			return packet[:-1]
 
 	def packet_callback(self, packet):
 		packet = self.descramble(packet)