unable to use A2 as GPIO output

[chaealarm]

#define ledpin A2
#define ledpin2 A1

void setup() {
  pinMode(ledpin, OUTPUT);
  pinMode(ledpin2, OUTPUT);
}

void loop() {
  digitalWrite(ledpin, HIGH);  
  delay(1000);   
  digitalWrite(ledpin, LOW);   
  delay(1000);        
  digitalWrite(ledpin2, HIGH);   
  delay(1000);                       
  digitalWrite(ledpin2, LOW);    
  delay(1000); 
}

At this code, A1 is blinking, but A2 is floating. These pin was no problem when using ch32v003fun.

I think something wrong in cores/arduino/wiring_digital.cpp at specifying pin number

[rsazenha]

20 this commit fix your issue. Check modification on file wiring_digital.cpp and change your file.

Line 52 change from this:

static uint8_t gpioPin(uint8_t gpio, pin_size_t pin) { if(gpio == 0) { return pin; } else if(gpio == 2) { return pin - 2; } else { return pin - 10; } }

To this:

static uint8_t gpioPin(uint8_t gpio, pin_size_t pin) { if(gpio == 0) { return pin + 1; } else if(gpio == 2) { return pin - 2; } else { return pin - 10; } }

[chaealarm]

20 this commit fix your issue. Check modification on file wiring_digital.cpp and change your file.

Line 52 change from this:

static uint8_t gpioPin(uint8_t gpio, pin_size_t pin) { if(gpio == 0) { return pin; } else if(gpio == 2) { return pin - 2; } else { return pin - 10; } }

To this:

static uint8_t gpioPin(uint8_t gpio, pin_size_t pin) { if(gpio == 0) { return pin + 1; } else if(gpio == 2) { return pin - 2; } else { return pin - 10; } }

It works! Thank you very much!