Document which bits are clutch and brake, respectively

diff --git a/can2joy.c b/can2joy.c
index a4ad4d4e0dd58ee60c0d1bf2296d15ac856d66e2..02460bfb6cf0cf40854915542c6979169fcd3d59 100644 (file)
--- a/can2joy.c
+++ b/can2joy.c
@@ -135,10 +135,13 @@ static void receive_one(int fd_can, int fd_uinput)
                 * control of your simulated Lamborghini!
                 */
                ev.type = EV_KEY;
+
+               /* Brake sets bits 0 and 1 (value 3) in byte 4 */
                ev.code = BTN_TRIGGER;
                ev.value = !(!(frm.data[4] & 3));
                write(fd_uinput, &ev, sizeof(ev));
 
+               /* Clutch sets bit 2 (value 4) in byte 6 */
                ev.code = BTN_THUMB;
                ev.value = !(!(frm.data[6] & 4));
                write(fd_uinput, &ev, sizeof(ev));