ESP8266 Developer Zone

Re: GPIO interrupt handler only firing once

2016-06-02T16:39:35+08:00

Found the problem in my code.
Not setting the button to pull up.

Code:

gpio_in_cfg.GPIO_Pullup = GPIO_PullUp_EN;

Statistics: Posted by gustavo — Thu Jun 02, 2016 4:39 pm

Re: GPIO interrupt handler only firing once

2016-05-31T19:30:42+08:00

Hi,
I'm having the same issue.

My code is as follows:

Code:

void callOut() {
    int gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS);
    GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, gpio_status);
    printf("callOut.");
}

void user_init(void)
{    
    GPIO_ConfigTypeDef gpio_in_cfg;                                    //Define GPIO Init Structure
    gpio_in_cfg.GPIO_IntrType = GPIO_PIN_INTR_NEGEDGE;                 //Falling edge trigger
    gpio_in_cfg.GPIO_Mode = GPIO_Mode_Input;                           //Input mode
    gpio_in_cfg.GPIO_Pin  = GPIO_Pin_12;                               // Enable GPIO
    gpio_config(&gpio_in_cfg);                                         //Initialization function
    gpio_intr_handler_register(callOut, NULL);                   // Register the interrupt function
    _xt_isr_unmask(1 << ETS_GPIO_INUM);                                //Enable the GPIO interrupt
}

How did you fix it?

Statistics: Posted by gustavo — Tue May 31, 2016 7:30 pm

GPIO interrupt handler only firing once

2015-10-12T10:06:23+08:00

I have written some code that attempts to register an interrupt handler for a GPIO. I find that when the signal changes on the pin, the interrupt handler does indeed fire ... but only the first time. If the signal changes again, no new interrupt handler invocation occurs. I have tried to acknowledge the interrupt, but no joy yet. I am using SDK 1.4.

At a high level, my code looks as follows:

InterruptHandler(mask) {
log the interrupt;
gpio_intr_ack(mask);
}

main() {
gpio_init();
Set the pin to be input;
gpio_intr_handler_register(InterruptHandler, NULL);
gpio_pin_intr_state_set(GPIO_PIN_ID(12), GPIO_PIN_INTR_ANYEDGE);
}

Can anyone spot what I might be missing?

Statistics: Posted by kolban — Mon Oct 12, 2015 10:06 am