ao_exti_set_mode(struct stm_gpio *gpio, uint8_t pin, uint8_t mode);
void
-ao_exti_set_callback(struct stm_gpio *gpio, uint8_t pin, void (*callback)());
+ao_exti_set_callback(struct stm_gpio *gpio, uint8_t pin, void (*callback)(void));
void
ao_exti_enable(struct stm_gpio *gpio, uint8_t pin);