fix toggle bit for sending

1 files changed, 1 insertions, 1 deletions

diff --git a/fw-update.c b/fw-update.c
index 72695b0..126d066 100644
--- a/fw-update.c
+++ b/fw-update.c
@@ -272,7 +272,7 @@ bool fw_update(int fd, uint8_t device_index, uint8_t *fw, size_t fw_len) {
              * doesn't do this either though, stopped counting after 61
              * retries... */
         } else { /* fw packet ack. */
-            action = (fw_pos / 15) & 1; /* enable toggle bit for odd blocks */
+            action = ((fw_pos + 1) / 15) & 1; /* toggle bit for odd blocks */
             fw_pos += 15; /* go to next fw block */
         }
     }