[PATCH] xyzModem: Correct xmodem blk verification conditions

When the blk sequence number is 255 and cblk is 0, the original XOR condition produces a result of 0,and the judgment condition will be unsuccessful.

Signed-off-by: Hongbin Ji jhb_ee@163.com --- common/xyzModem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/xyzModem.c b/common/xyzModem.c index fb319f7119..0bc1a87067 100644 --- a/common/xyzModem.c +++ b/common/xyzModem.c @@ -373,7 +373,7 @@ xyzModem_get_hdr (void) } ZM_DEBUG (zm_dump (__LINE__)); /* Validate the message */ - if ((xyz.blk ^ xyz.cblk) != (unsigned char) 0xFF) + if (~xyz.blk != xyz.cblk) { ZM_DEBUG (zm_dprintf ("Framing error - blk: %x/%x/%x\n", xyz.blk, xyz.cblk,