Nucleo U575ZI-Q Red LED doesn't light

[tookitogo]

Environment: PlatformIO v3.2.0 in VS Code 1.79.2 on Windows 11 (22H2 22621.1848).

Something is going wrong with the board definition or toolchain for the Nucleo U575ZI-Q.

While the blue and green LEDs (LED_BLUE and LED_GREEN, respectively) work fine, the red LED (LED_RED) does not.

The same exact test code pasted into Arduino IDE 2.1.1 (using the latest STM32 board support, 2.5.0 currently) works perfectly.

What I can rule out is an issue in the pin definition macros themselves: in both PlatformIO and in Arduino IDE, the LED_RED resolves to LED_LD3, which in turn resolves to PG2, and ultimately to pin number 105.

Test code

#include <Arduino.h>

// put function declarations here:
void blink(void);

enum speeds
{
  fast = 100,
  medium = 500,
  slow = 1000
};

speeds mydelay = slow;

enum LEDs
{
  none,
  red,
  green,
  blue
};

LEDs myled = red;

void setup()
{
  // put your setup code here, to run once:
  pinMode(LED_RED, OUTPUT);
  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_BLUE, OUTPUT);
}

void loop()
{
  // put your main code here, to run repeatedly:
  blink();
}

// put function definitions here:
void blink(void)
{
  delay(mydelay); // delay by current setting
  // toggle between colors
  switch (myled)
  {
  case none:
    digitalWrite(LED_RED, LOW);
    digitalWrite(LED_GREEN, LOW);
    digitalWrite(LED_BLUE, LOW);
    myled = red;
    break;
  case red:
    digitalWrite(LED_RED, HIGH);
    digitalWrite(LED_GREEN, LOW);
    digitalWrite(LED_BLUE, LOW);
    myled = green;
    break;
  case green:
    digitalWrite(LED_RED, LOW);
    digitalWrite(LED_GREEN, HIGH);
    digitalWrite(LED_BLUE, LOW);
    myled = blue;
    break;
  case blue:
    digitalWrite(LED_RED, LOW);
    digitalWrite(LED_GREEN, LOW);
    digitalWrite(LED_BLUE, HIGH);
    myled = red;
    break;
  default:
    break;
  }
}

Additionally, addressing the red LED in STM32CubeIDE also works fine.

I haven't tested any other GPIOs, but can do so if requested.

[valeros]

Thanks for reporting, fixed in the dev branch.