ESP8266 GPIO Interrupt

[RPP]

Hi,

I’m trying to config the ESP8266 GPIO4 to generate an interrupt as in the example on “ESP8266 Technical Reference Version 1.3 2017”, page 19, but didn’t work. The functions
ETS_GPIO_INTR_DISABLE(), ETS_GPIO_INTR_ATTACH() and ETS_GPIO_INTR_ENABLE aren’t defined (I’m using the toolchains esp8266-gcc5.2.0-r15)

Code:
(…)
static void ISR_shutoff(void *pvParameters)
{
Uint16 gpio_status = 0;
gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS);
GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, gpio_status);
if (gpio_status & (BIT(4)))
{
(…)
}
}

(…)
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
GPIO_DIS_OUTPUT(GPIO_ID_PIN(4));
//ETS_GPIO_INTR_DISABLE();
//ETS_GPIO_INTR_ATTACH(GPIO_INTERRUPT, NULL);
gpio_pin_intr_state_set(GPIO_ID_PIN(4), GPIO_PIN_INTR_NEGEDGE);
gpio_intr_handler_register((void *) ISR_shutoff, NULL);
//ETS_GPIO_INTR_ENABLE();

How can I configure ESP8266 GPIO to generate interrupt? Is there some GPIO interrupt example that I can use?

[MystikReasons]

Try this one: https://circuits4you.com/2017/12/08/esp8266-external-interrupt-example/ or this https://techtutorialsx.com/2016/12/11/esp8266-external-interrupts/

[support]

@MystikReasons, Thanks for sharing this!

[RPP]

Both examples uses “Arduino core for ESP8266 WiFi chip” and I would like an example using ESP8266_RTOS_SDK v2.x.x (I don’t known exactly wich RTOS SDK version “esp8266-gcc5.2.0-r15.exe” installs).

I took a look at https://github.com/espressif/ESP8266_RTOS_SDK/tree/release/v2.x.x/examples, but there isn’t a GPIO interrupt example.

There is an exemple for SDK v3.0 at https://github.com/espressif/ESP8266_RTOS_SDK/blob/release/v3.0/examples/peripherals/gpio/main/user_main.c, but I would have to change the SDK.

Do you know where I can found an example for SDK v2.x.x?

[RPP]

I found an example at https://github.com/espressif/esp8266-rtos-sample-code/blob/master/02Peripheral/GPIOtest/user/user_main.c

I did the following:

1 – Declare the prototype “void gpio_config(GPIO_ConfigTypeDef *pGPIOConfig);” in the file “gpio.h”. This function is already defined at gpio.c;
2 – Define the macros “#define ETS_GPIO_INTR_ENABLE() _xt_isr_unmask(1 << ETS_GPIO_INUM) //ENABLE INTERRUP//TS” and “#define ETS_GPIO_INTR_DISABLE() _xt_isr_mask(1 << ETS_GPIO_INUM) //DISABLE INTERRUPTS”
in the file “ets_sys.h”
3 – Configure the interrupt for the desired pin (in this case, GPIO4):
GPIO_ConfigTypeDef io_in_conf;
io_in_conf.GPIO_IntrType = GPIO_PIN_INTR_NEGEDGE;
io_in_conf.GPIO_Mode = GPIO_Mode_Input;
io_in_conf.GPIO_Pin = GPIO_Pin_4;
io_in_conf.GPIO_Pullup = GPIO_PullUp_DIS;
gpio_config(&io_in_conf);
gpio_intr_handler_register((void *)ISR_shutoff, NULL);
ETS_GPIO_INTR_ENABLE();
4 – Create the interrupt handle:
static void ISR_shutoff(void *pvParameters)
{
Uint16 gpio_status = GPIO_REG_READ(GPIO_STATUS_ADDRESS);

if (gpio_status & (BIT(4)))
{
(…)
}
GPIO_REG_WRITE(GPIO_STATUS_W1TC_ADDRESS, gpio_status);
}

Best regards,

RPP

[Author]

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