fixed an bug in bitmask of movement

2013-06-05 12:35:17 -07:00
parent 9c42492103
commit eea517e956
1 changed files with 1 additions and 1 deletions
--- a/dump1090.c
+++ b/dump1090.c
@ -1065,7 +1065,7 @@ void decodeModesMessage(struct modesMessage *mm, unsigned char *msg) {
            mm->flight[8] = '\0';
        } else if (mm->metype >= 5 && mm->metype <= 8) {
            /* Surface Position Message */
-            int mvt = ((msg[0] & 3) << 4) | (msg[1] >> 4) ;
+            int mvt = ((msg[0] & 7) << 4) | (msg[1] >> 4) ;
            if (mvt == 0) {
                mm->velocity = 0; /* unknown */
            } else if (mvt == 1) {