Couldn't set and reset a GPIO using the HAL_GPIO_Write function

[NSemrHomeInit]

Dear ST Hello,

I couldn't understand why I couldn't set and reset the PB4 GPIO. I am trying to visualize the GpIO signal using an oscilloscope.

I am using CubeMx for this project

I am using this GPIO for CS with SPI3.

 

HAL_GPIO_WritePin(SPI3_CS_GPIO_Port, SPI3_CS_Pin, GPIO_PIN_RESET);
	status = HAL_SPI_TransmitReceive(&hspi3, (uint8_t*)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE, 5000);
	HAL_GPIO_WritePin(SPI3_CS_GPIO_Port, SPI3_CS_Pin, GPIO_PIN_SET);

Thank you in advance

S.Tarik

[TDK · Accepted solution]

Why do you think you can't set/reset PB4? Did you start the clock? These should be done in the generated code, but you can also check the GPIO registers to see if it's set correctly.

[NSemrHomeInit]

I have a ground problem, it's okay now, Thank you.