with Evaluation STM32H7 board, LEDs do not work properly.

[OhBang]

In my first stm32 project, I wanted to turn on and off LD1~LD4 on EVAL-STM32H757 board.

LD2 and LD4 worked good, but LD1 and LD3 did not work.

I set IOC file only RCC and GPIO and Clock Configuration with no error.

• GPIO Pins : PK3, PK4, PK5, PK6 as GPIO Outputs(corresponding LD1, LD2, LD3, LD4 respectively)

====

 while (1)

 {

 HAL_GPIO_TogglePin(GPIOK, GPIO_PIN_3); // not working

 HAL_GPIO_TogglePin(GPIOK, GPIO_PIN_4);

 HAL_GPIO_TogglePin(GPIOK, GPIO_PIN_5); // not working

 HAL_GPIO_TogglePin(GPIOK, GPIO_PIN_6);

 HAL_Delay(50);

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

 }

 /* USER CODE END 3 */

======

Did I missed something?

[Pavel A.]

Are all these LEDs directly connected to GPIOs? On some similar H7 EVAL boards two of 4 LEDs are connected thru I/O expander on I2C.

[OhBang]

All LEDs are connected to MCU directly. I checked in Altium schematics from STmicro and official manual.

Evaluation board is an ST micro product - STM32H757-EVAL.

With provided hex sample, LD1 is turned on and off.

R294,R295,R296,R297 are not mounted in pcb.

​​

[Tesla DeLorean]

Check GPIOK register settings, and code actually initializing the pins.

[Pavel A.]

In addition to Tesla's reply, some "BSP" features are enabled by a config .h file or preprocessor defines (smth. related to the board name). Make sure this is correct in your project. This can affect initialization of these LED GPIOs.

[OhBang]

Problem solved.

It was hard to set GPIO registers manually, so I set on .ioc file.

GPIOs of STM32H7 should be assigned to core M7 or M4 properly(also Pull-up or Pull-down option and output level option) as picture shows.