Hi all, for some reason I have massive trouble making an SPI write function for a w5500 chip. I followed various threads to make this code which I also did for the solution of my problem. Sadly it hasnt helped yet. Thats why I am making my own post now.
Firstly I have configured the SPI1 interface via the mx editor like so:
static void MX_SPI1_Init(void)
{
/* USER CODE BEGIN SPI1_Init 0 */
/* USER CODE END SPI1_Init 0 */
/* USER CODE BEGIN SPI1_Init 1 */
/* USER CODE END SPI1_Init 1 */
/* SPI1 parameter configuration*/
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 7;
hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI1_Init 2 */
/* USER CODE END SPI1_Init 2 */
}
The readwrite funciton I made is:
uint8_t SPIReadWrite(uint8_t data)
{
SPI1->CR2 |= SPI_CR2_FRXTH;
while((SPI1->SR&SPI_FLAG_TXE)==0); //??????
SPI1->DR=data;
while((SPI1->SR&SPI_FLAG_RXNE)==0); //???????byte
uint8_t x = SPI1->DR;
printf("value x %d", x);
return 0;
}
The code reliably gets stuck on line 7. Also, the TXE registervalue always stays one.
I connected the lines on my stm32 as follows to the w5500:
MISO -> SDC
MOSI -> SDI
SCK -> SDCK
Yet nothing is working, I never get out of the while loop and I never receive anything. Is there someone who could help me with this?
