typedef int16_t accel_t;
#define ao_data_accel(packet) ((packet)->adc.accel)
-#define ao_data_set_accel(packet, accel) ((packet)->adc.accel = (accel))
+#define ao_data_set_accel(packet, a) ((packet)->adc.accel = (a))
#define ao_data_accel_invert(a) (0x7fff -(a))
/*