ESP32 Forum

Posted: **Wed Dec 04, 2019 10:26 pm**

I have a project that needs to handle GPIO and time interruptions.
By compiling the code below I get:
exit status 1
void onTimer0() causes a section type conflict with void Button::isr()

Code: [Select all] [Expand/Collapse]

#define START_BUTTON 19 // gpio19    // Ligada ao botao start (iniciar ciclo)
#define STOP_BUTTON  23 // gpio23    // Ligada ao botal stop all 
 
#include <FunctionalInterrupt.h>
class Button
{
  public:
    Button(uint8_t reqPin) : PIN(reqPin) {
      pinMode(PIN, INPUT_PULLUP);
      attachInterrupt(PIN, std::bind(&Button::isr, this), FALLING);
    };
    ~Button() {
      detachInterrupt(PIN);
    }
    void IRAM_ATTR isr() {
      //numberKeyPresses += 1;
      pressed = true;
    }
    bool checkPressed() {
      bool lastPressed;
      lastPressed = this->pressed;
      this->pressed = false;
      return lastPressed;
    }
  private:
    const uint8_t PIN;
    //volatile uint32_t numberKeyPresses;
    volatile bool pressed;
    
};
Button start_button(START_BUTTON);
Button stop_button(STOP_BUTTON);
 
#define LedI            2      // Esp32 Pin Led
byte ledI_flash=0;             // Internal led flash control
 
hw_timer_t * timer0 = NULL;    // timer to flash
 
void IRAM_ATTR onTimer0(){
      if (ledI_flash) digitalWrite(LedI, digitalRead(LedI) ^ 1);   // toggle LED pin
}
 
void setup() {
  // Setup timer
    timer0 = timerBegin(0, 24000, true); //timerID 0, div 80
    timerAttachInterrupt(timer0, &onTimer0, true);
    timerAlarmWrite(timer0, 5000, true);   
    timerAlarmEnable(timer0); // enable timer  
  // start flashing
    ledI_flash=1;
}
 
void loop() {
  // put your main code here, to run repeatedly:
     if (start_button.checkPressed()) ledI_flash=1;
     if (stop_button.checkPressed()) ledI_flash=0;
}

If i remove IRAM_ATTR from one or both isr statements I succeed in compiling.

I'm using Arduino 1.8.9 and appreciate any help understanding the cause and solution.
Thanks,
Tiberio

ESP32 Forum

Compiler error: one_isr() causes a section type conflict with another_isr()

Compiler error: one_isr() causes a section type conflict with another_isr()