#define BEEPER_PORT (&stm_gpioe)
#define BEEPER_PIN 4
#define AO_BEEP_MID_DEFAULT 179 /* 2100 Hz */
-#define AO_BEEP_MAKE_LOW(m) ((m) * 197/179) /* 1900 Hz */
-#define AO_BEEP_MAKE_HIGH(m) ((m) * 163/179) /* 2300 Hz */
+#define AO_BEEP_MAKE_LOW(m) ((uint8_t) ((m) * 197U/179U)) /* 1900 Hz */
+#define AO_BEEP_MAKE_HIGH(m) ((uint8_t) ((m) * 163U/179U)) /* 2300 Hz */
#define HAS_BATTERY_REPORT 1
#define HAS_RADIO 1
#define HAS_TELEMETRY 1