STM32- Nucleo-H755ZIQ- LED blink- SPI

[STork.1]

Previously I wrote a program for - Nucleo-H755ZIQ in which I used SPI- UART- RTOS.

After a long time, I wanna make a new stm32 project and reuse some previous function I was using correctly before.

The problem is that not only those functions don't work but also I can not even set and reset an led .

Here are my function which were working on the current MCU:

void adxl_355_write(uint8_t reg_adress, uint8_t reg_value ){
 
	uint8_t data[2];
	uint8_t WRITE_BYTE = 0x00;
	reg_adress=(reg_adress << 1) | WRITE_BYTE;
	data[0]= reg_adress;
	data[1]=reg_value;
	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);// set SPI1_CS LOW
	HAL_SPI_Transmit(&hspi1, data, 2, 1);
	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);// set SPI1_CS HIGH
 
}
 
uint8_t adxl_355_Read(uint8_t reg_adress){
	//READ_BYTE
	uint8_t byte_ToBe_received=0;
	uint8_t m_reg_adress=0;
	uint8_t  READ_BYTE = 0x01;
 
	m_reg_adress=(reg_adress << 1) | READ_BYTE;  //modified register address
	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);// set SPI1_CS LOW
	HAL_SPI_Transmit(&hspi1, &m_reg_adress, 1, 1);
	HAL_SPI_Receive(&hspi1, &byte_ToBe_received, 1, 1);
	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);// set SPI1_CS HIGH
	return  byte_ToBe_received;
 
}

 Here are the codes inside the while loop :

HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);
	 HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_RESET);
	 HAL_GPIO_WritePin(GPIOE, GPIO_PIN_1, GPIO_PIN_RESET);
	 HAL_Delay(500);
	 HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);
	 HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_SET);
	 HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET);
	 HAL_Delay(500);

[FBL]

Hi @STork.1​ 

I would like to know what changed since it was working (Hardware or software changes)?

Then, can you test with a ready to use example from STM32CubeH7? This example should work properly for NUCLEO-H755ZI

[STork.1 · Accepted solution]

Hi , the probnlem was that I forgot to assign SPI_CS pin to the m7 Core inside the CubeMX .

Thanks for your reply