link: add CRC check to BFM

diff --git a/lib/sata/link/test/bfm.py b/lib/sata/link/test/bfm.py
index db276c0f163eba72f17537c63c895cc9fea84272..7587f489a43d66ead14ab784f167ffb50de42777 100644 (file)
--- 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)