uint32_t mask = 1 << pin;
uint32_t pupdr;
uint8_t irq;
-
+
ao_exti_callback[pin] = callback;
+
+ /* configure gpio to interrupt routing */
+ stm_exticr_set(gpio, pin);
+
/* configure pin as input, setting selected pull-up/down mode */
stm_moder_set(gpio, pin, STM_MODER_INPUT);
switch (mode & (AO_EXTI_MODE_PULL_UP|AO_EXTI_MODE_PULL_DOWN)) {