Error when using IRAM_ATTR
Posted: Tue Aug 16, 2022 1:08 pm
Hello
I am new to ESP-IDF and I have create my first application with an interrupt handler and the application is working fine (Switching a led on/off based on a button interrupt).
But Visual Studio Code sees 3 problems in my code at line "void IRAM_ATTR button_isr_handler(void *args)".
When i remove IRAM_ATTR a problems are gone but i don't know why IRAM_ATTR gives me problems.
the problems are
- Expected a type specifier
- exptected a '{'
- identifier "button_isr_handler" is undefine (this is in the app_main)
Does anyone know where these IRAM_ATTR errors come from ?
Do i miss a setting in sdkconfig ???
I am new to ESP-IDF and I have create my first application with an interrupt handler and the application is working fine (Switching a led on/off based on a button interrupt).
But Visual Studio Code sees 3 problems in my code at line "void IRAM_ATTR button_isr_handler(void *args)".
When i remove IRAM_ATTR a problems are gone but i don't know why IRAM_ATTR gives me problems.
the problems are
- Expected a type specifier
- exptected a '{'
- identifier "button_isr_handler" is undefine (this is in the app_main)
Does anyone know where these IRAM_ATTR errors come from ?
Do i miss a setting in sdkconfig ???
Code: Select all
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_log.h"
#define ESP_INR_FLAG_DEFAULT 0
#define BUTTON_PIN GPIO_NUM_25
TaskHandle_t ButtonTask_handle;
TaskHandle_t RedLedTask_handle;
TaskHandle_t GreenLedTask_handle;
TaskHandle_t ISR_handle;
TaskHandle_t volatile NextTask_Handle = NULL;
void IRAM_ATTR button_isr_handler(void *args)
{
xTaskResumeFromISR(ISR_handle);
}
void button_task(void *args)
{
bool led_status = false;
while (1)
{
vTaskSuspend(NULL);
led_status = !led_status;
gpio_set_level(GPIO_NUM_26, led_status);
printf("Button pressed !");
}
}
void app_main(void)
{
// Initializeing GPIO25 as input with pull donw resistor.
// Switch is connected to 3V3
gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);
gpio_set_pull_mode(BUTTON_PIN, GPIO_PULLDOWN_ONLY);
// IO pins 26 and 27 as output
gpio_set_direction(GPIO_NUM_26, GPIO_MODE_INPUT_OUTPUT);
gpio_set_direction(GPIO_NUM_27, GPIO_MODE_INPUT_OUTPUT);
//enable inerrupt on falling edge for the button pin
gpio_set_intr_type(BUTTON_PIN, GPIO_INTR_NEGEDGE);
//Install the drivers's GPIO ISR handler service, which allow per-pin GPIO interrupt handlers
//Install ISR serive with default configuration
gpio_install_isr_service(ESP_INR_FLAG_DEFAULT);
//Attach the interrupt routine to the service routine
gpio_isr_handler_add(BUTTON_PIN, button_isr_handler, NULL);
xTaskCreate(button_task, "Button task", 1024 * 2, NULL, 5, &ISR_handle);
}