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cc3200: Make sure to handle all pending pin interrupts. 

When entering the interrupt handler of a given GPIO port, more than
one pin could have pending interrupts, therefore care must be taken
to service each interrupt one by one before leaving.
This commit is contained in:
Daniel Campora 2015-05-17 13:42:15 +02:00
parent 8e611e8414
commit fb9e4cf463
1 changed files with 12 additions and 7 deletions
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19
cc3200/mods/pybpin.c
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@ -712,7 +712,6 @@ STATIC const mp_map_elem_t pin_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_RISING_FALLING), MP_OBJ_NEW_SMALL_INT(GPIO_BOTH_EDGES) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_LOW_LEVEL), MP_OBJ_NEW_SMALL_INT(GPIO_LOW_LEVEL) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_HIGH_LEVEL), MP_OBJ_NEW_SMALL_INT(GPIO_HIGH_LEVEL) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_S2MA), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_2MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_S4MA), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_4MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_S6MA), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_6MA) },
@ -752,12 +751,18 @@ STATIC void GPIOA3IntHandler (void) {
// common interrupt handler
STATIC void EXTI_Handler(uint port) {
uint32_t bit = MAP_GPIOIntStatus(port, true);
MAP_GPIOIntClear(port, bit);
uint32_t bits = MAP_GPIOIntStatus(port, true);
MAP_GPIOIntClear(port, bits);
// TODO: loop through all the active bits before exiting
pin_obj_t *self = (pin_obj_t *)pin_find_pin_by_port_bit(&pin_cpu_pins_locals_dict, port, bit);
mp_obj_t _callback = mpcallback_find(self);
mpcallback_handler(_callback);
// might be that we have more than one Pin interrupt triggered at the same time
// therefore we must loop through all the 8 possible bits
for (int i = 0; i < 8; i++) {
uint32_t bit = (1 << i);
if (bit & bits) {
pin_obj_t *self = (pin_obj_t *)pin_find_pin_by_port_bit(&pin_cpu_pins_locals_dict, port, bit);
mp_obj_t _callback = mpcallback_find(self);
mpcallback_handler(_callback);
}
}
}