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Get pin levels at time of interrupt, rather than the time of calling the handler

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current implementation can cause false readings if previous handlers
take more time than the pin holds the level
This commit is contained in:
Me No Dev 2015-11-29 18:15:07 +02:00
parent 5d49085c8c
commit 466fa6f5a9
1 changed files with 2 additions and 1 deletions
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3
cores/esp8266/core_esp8266_wiring_digital.c
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@ -111,6 +111,7 @@ static uint32_t interrupt_reg = 0;
void interrupt_handler(void *arg) {
uint32_t status = GPIE;
uint32_t levels = GPI;
GPIEC = status;//clear them interrupts
if(status == 0 || interrupt_reg == 0) return;
ETS_GPIO_INTR_DISABLE();
@ -122,7 +123,7 @@ void interrupt_handler(void *arg) {
interrupt_handler_t *handler = &interrupt_handlers[i];
if (handler->fn &&
(handler->mode == CHANGE ||
(handler->mode & 1) == digitalRead(i))) {
(handler->mode & 1) == !!(levels & (1 << i)))) {
// to make ISR compatible to Arduino AVR model where interrupts are disabled
// we disable them before we call the client ISR
uint32_t savedPS = xt_rsil(15); // stop other interrupts