SPI recieving problems

[yuri CH]

Hello!

I am working with the dual core stm32h745 nucleo board, currently on the M4 core.

here are the defenitions in cubeMX:

 

the defenition is for a recieve only master which belongs to the m4 cortex.

while trying to use HAL_SPI_Receive_IT() or HAL_SPI_Receive() i am not able to get HAL_OK status. the board isnt connected to any other hardware and i am trying to see that i am ok on my side.

my actions are pretty straight fowards, could you please advise on what i might be doing wrong and what can create such a problem ?

thank you!

[TDK]

> i am not able to get HAL_OK status

So what do you get instead?

Show your code, likely a software issue, perhaps the peripheral isn't being initialized. You can step through HAL_SPI_Receive to see what it objects to.

[yuri CH]

Hi!

the  MX_SPI1_Init() function returns a HAL_OK status and seems to go fine.

when i use the HAL_SPI_Receive() the status returned is HAL_ERROR.

when i use the HAL_SPI_Receive_IT() the status returned is HAL_OK for the first call and then its always HAL_BUSY.

after expiriencing these issues i have created a very simple test project using CubeMX,

the only code i have added was in th main loop:

while (1)

 {

  if(HAL_GetTick() - Tick > 1000)

  {

   Tick = HAL_GetTick();

   Status = HAL_SPI_Transmit(&hspi1, Data, 1,1);

   if(Status == HAL_OK)

    HAL_GPIO_TogglePin(LD1_GPIO_Port, LD1_Pin);

  }

i have noticed something a bit disturbing, the SPI readings were successful on the M7 core,

when i tried the same on the M4 core they all failed as describe above.

perhaps this can give a clue about whats going on?

[yuri CH]

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "string.h"
 
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
 
/* USER CODE END Includes */
 
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
 
/* USER CODE END PTD */
 
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
 
#ifndef HSEM_ID_0
#define HSEM_ID_0 (0U) /* HW semaphore 0*/
#endif
/* USER CODE END PD */
 
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
 
/* USER CODE END PM */
 
/* Private variables ---------------------------------------------------------*/
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
 
#pragma location=0x30040000
ETH_DMADescTypeDef  DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
#pragma location=0x30040060
ETH_DMADescTypeDef  DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
#pragma location=0x30040200
uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE]; /* Ethernet Receive Buffers */
 
#elif defined ( __CC_ARM )  /* MDK ARM Compiler */
 
__attribute__((at(0x30040000))) ETH_DMADescTypeDef  DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
__attribute__((at(0x30040060))) ETH_DMADescTypeDef  DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
__attribute__((at(0x30040200))) uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE]; /* Ethernet Receive Buffer */
 
#elif defined ( __GNUC__ ) /* GNU Compiler */
 
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT] __attribute__((section(".RxDecripSection"))); /* Ethernet Rx DMA Descriptors */
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT] __attribute__((section(".TxDecripSection")));   /* Ethernet Tx DMA Descriptors */
uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE] __attribute__((section(".RxArraySection"))); /* Ethernet Receive Buffers */
 
#endif
 
ETH_TxPacketConfig TxConfig;
 
ETH_HandleTypeDef heth;
 
SPI_HandleTypeDef hspi1;
 
UART_HandleTypeDef huart3;
 
/* USER CODE BEGIN PV */
 
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
/* USER CODE BEGIN PFP */
 
/* USER CODE END PFP */
 
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t Data[4];
uint32_t Tick;
HAL_StatusTypeDef Status;
/* USER CODE END 0 */
 
/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
 
  /* USER CODE END 1 */
 
/* USER CODE BEGIN Boot_Mode_Sequence_1 */
  /*HW semaphore Clock enable*/
  __HAL_RCC_HSEM_CLK_ENABLE();
  /* Activate HSEM notification for Cortex-M4*/
  HAL_HSEM_ActivateNotification(__HAL_HSEM_SEMID_TO_MASK(HSEM_ID_0));
  /*
  Domain D2 goes to STOP mode (Cortex-M4 in deep-sleep) waiting for Cortex-M7 to
  perform system initialization (system clock config, external memory configuration.. )
  */
  HAL_PWREx_ClearPendingEvent();
  HAL_PWREx_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFE, PWR_D2_DOMAIN);
  /* Clear HSEM flag */
  __HAL_HSEM_CLEAR_FLAG(__HAL_HSEM_SEMID_TO_MASK(HSEM_ID_0));
 
/* USER CODE END Boot_Mode_Sequence_1 */
  /* MCU Configuration--------------------------------------------------------*/
 
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
 
  /* USER CODE BEGIN Init */
 
  /* USER CODE END Init */
 
  /* USER CODE BEGIN SysInit */
 
  /* USER CODE END SysInit */
 
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_SPI1_Init();
  /* USER CODE BEGIN 2 */
 
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    if(HAL_GetTick() - Tick > 1000)
    {
      Tick = HAL_GetTick();
      Status = HAL_SPI_Transmit(&hspi1, Data, 1,1);
      if(Status == HAL_OK)
        HAL_GPIO_TogglePin(LD1_GPIO_Port, LD1_Pin);
    
    }
    /* USER CODE END WHILE */
 
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}
 
/**
  * @brief ETH Initialization Function
  * @param None
  * @retval None
  */
void MX_ETH_Init(void)
{
 
  /* USER CODE BEGIN ETH_Init 0 */
 
  /* USER CODE END ETH_Init 0 */
 
   static uint8_t MACAddr[6];
 
  /* USER CODE BEGIN ETH_Init 1 */
 
  /* USER CODE END ETH_Init 1 */
  heth.Instance = ETH;
  MACAddr[0] = 0x00;
  MACAddr[1] = 0x80;
  MACAddr[2] = 0xE1;
  MACAddr[3] = 0x00;
  MACAddr[4] = 0x00;
  MACAddr[5] = 0x00;
  heth.Init.MACAddr = &MACAddr[0];
  heth.Init.MediaInterface = HAL_ETH_RMII_MODE;
  heth.Init.TxDesc = DMATxDscrTab;
  heth.Init.RxDesc = DMARxDscrTab;
  heth.Init.RxBuffLen = 1524;
 
  /* USER CODE BEGIN MACADDRESS */
 
  /* USER CODE END MACADDRESS */
 
  if (HAL_ETH_Init(&heth) != HAL_OK)
  {
    Error_Handler();
  }
 
  memset(&TxConfig, 0 , sizeof(ETH_TxPacketConfig));
  TxConfig.Attributes = ETH_TX_PACKETS_FEATURES_CSUM | ETH_TX_PACKETS_FEATURES_CRCPAD;
  TxConfig.ChecksumCtrl = ETH_CHECKSUM_IPHDR_PAYLOAD_INSERT_PHDR_CALC;
  TxConfig.CRCPadCtrl = ETH_CRC_PAD_INSERT;
  /* USER CODE BEGIN ETH_Init 2 */
 
  /* USER CODE END ETH_Init 2 */
 
}
 
/**
  * @brief SPI1 Initialization Function
  * @param None
  * @retval None
  */
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_RXONLY;
  hspi1.Init.DataSize = SPI_DATASIZE_19BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 0x0;
  hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
  hspi1.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
  hspi1.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
  hspi1.Init.TxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
  hspi1.Init.RxCRCInitializationPattern = SPI_CRC_INITIALIZATION_ALL_ZERO_PATTERN;
  hspi1.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
  hspi1.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
  hspi1.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
  hspi1.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;
  hspi1.Init.IOSwap = SPI_IO_SWAP_DISABLE;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN SPI1_Init 2 */
 
  /* USER CODE END SPI1_Init 2 */
 
}
 
/**
  * @brief USART3 Initialization Function
  * @param None
  * @retval None
  */
void MX_USART3_UART_Init(void)
{
 
  /* USER CODE BEGIN USART3_Init 0 */
 
  /* USER CODE END USART3_Init 0 */
 
  /* USER CODE BEGIN USART3_Init 1 */
 
  /* USER CODE END USART3_Init 1 */
  huart3.Instance = USART3;
  huart3.Init.BaudRate = 115200;
  huart3.Init.WordLength = UART_WORDLENGTH_8B;
  huart3.Init.StopBits = UART_STOPBITS_1;
  huart3.Init.Parity = UART_PARITY_NONE;
  huart3.Init.Mode = UART_MODE_TX_RX;
  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart3.Init.OverSampling = UART_OVERSAMPLING_16;
  huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart3.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart3) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart3, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart3, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart3) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART3_Init 2 */
 
  /* USER CODE END USART3_Init 2 */
 
}
 
/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
 
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
 
  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(LD1_GPIO_Port, LD1_Pin, GPIO_PIN_RESET);
 
  /*Configure GPIO pin : LD1_Pin */
  GPIO_InitStruct.Pin = LD1_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(LD1_GPIO_Port, &GPIO_InitStruct);
 
}
 
/* USER CODE BEGIN 4 */
 
/* USER CODE END 4 */
 
/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}
 
#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
 

This is the M4 main.c code.

[TDK · Accepted solution]

> hspi1.Init.Direction = SPI_DIRECTION_2LINES_RXONLY;

> Status = HAL_SPI_Transmit(&hspi1, Data, 1,1);

The code you posted doesn't use HAL_SPI_Receive. Rather, it uses HAL_SPI_Transmit. You have the SPI set up in RX only mode. Hence, the configuration isn't compatible with what you're trying to do.

I would recommend using 2-line mode and leaving one of the pins uninitialized if you don't need it. The RX-only mode of the hardware is awkward and can lead to unexpected/undesired extra clocks.

[yuri CH]

thanks again for responding!

I'm sorry, i've put up the wrong code, i am using HAL_SPI_Receive() and also as i said tried HAL_SPI_Receive_IT().

in both cases while observing the clk line on the scope i saw that:

on the M7 - a clock is generated and the status from function is HAL_OK.

on the M4 - no clock sinal is generated, the clock goes high for a short time and goes low again.

i am currently using the receive only master, i will try what you suggested to use the full spi.

in the meantime could you think of a reason why something that works on the M7 does not work on the M4?