gpio_interrupt_handler() can now be overriden
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a61af52d96
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2 changed files with 33 additions and 3 deletions
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@ -58,7 +58,7 @@ void gpio_set_pullup(uint8_t gpio_num, bool enabled, bool enabled_during_sleep)
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static gpio_interrupt_handler_t gpio_interrupt_handlers[16] = { 0 };
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static void IRAM _gpio_intr_internal_handler(void)
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void __attribute__((weak)) IRAM gpio_interrupt_handler(void)
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{
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uint32_t status_reg = GPIO.STATUS;
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GPIO.STATUS_CLEAR = status_reg;
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@ -82,8 +82,8 @@ void gpio_set_interrupt(const uint8_t gpio_num, const gpio_inttype_t int_type, g
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gpio_interrupt_handlers[gpio_num] = handler;
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GPIO.CONF[gpio_num] = SET_FIELD(GPIO.CONF[gpio_num], GPIO_CONF_INTTYPE, int_type);
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if(int_type != GPIO_INTTYPE_NONE && handler) {
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_xt_isr_attach(INUM_GPIO, _gpio_intr_internal_handler);
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if(int_type != GPIO_INTTYPE_NONE) {
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_xt_isr_attach(INUM_GPIO, gpio_interrupt_handler);
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_xt_isr_unmask(1<<INUM_GPIO);
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}
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}
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@ -129,6 +129,36 @@ static inline bool gpio_read(const uint8_t gpio_num)
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typedef void (* gpio_interrupt_handler_t)(uint8_t gpio_num);
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/*
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* You can implement GPIO interrupt handlers in either of two ways:
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* - Implement handler and use it with the gpio_set_interrupt()
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*
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* Example:
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*
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* void my_intr_handler(uint8_t gpio_num) {
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* // Do something when GPIO changes
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* }
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* ...
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* gpio_set_interrupt(MY_GPIO_NUM, GPIO_INTTYPE_EDGE_ANY, my_intr_handler);
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*
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* OR
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*
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* - Implement a single function named gpio_interrupt_handler(). This
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* will need to manually check GPIO.STATUS and clear any status
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* bits after handling interrupts. This gives you full control, but
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* you can't combine it with the first approach.
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*
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* Example:
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*
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* void IRAM gpio_interrupt_handler(void) {
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* // check GPIO.STATUS
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* // write GPIO.STATUS_CLEAR
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* // Do something when GPIO changes
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* }
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* ...
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* gpio_set_interrupt(MY_GPIO_NUM, GPIO_INTTYPE_EDGE_ANY, NULL);
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*/
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/* Set the interrupt type for a given pin
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*
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* If int_type is not GPIO_INTTYPE_NONE, the gpio_interrupt_handler will be
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