SPI with DMA is not working in stm32g0

[vividhadhengre]

Hello,

Currently I am trying to configure SPI with DMA, where i am only using DMA for Transmit and Not for Receive, I have generated the code through STM32cubeIDE, i have c=external clock at 16mhz and my Baud rate is 4Mhz. i am not using any SPI interrupt. DMA interrupts are by default enabled

I am using SPI for writing into FRAM. 

My code is misbehaving like sometimes it will write and sometimes not. Sometimes it will read sometimes not. I am not able understand the reason. Basically, it's not working properly

[mƎALLEm]

Hello,

You said:

---

@vividhadhengre wrote:

Currently I am trying to configure SPI with DMA, where i am only using DMA for Transmit and Not for Receive,

 

---

@vividhadhengre wrote:

My code is misbehaving like sometimes it will write and sometimes not. Sometimes it will read sometimes not. 

Contradiction here: you only transmit (only write). Then you said sometimes you could write or you you could read.

Need to share your code and your ioc file so others can understand what you are trying to do and elaborate more about your issue.

Thank you.

[vividhadhengre]

This is the code which i am work on. I have also attached the IOC file

main.c

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file : main.c
 * @brief : Main program body
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2024 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
 
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "fram_ext.h"
/* USER CODE END Includes */
 
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
 
/* USER CODE END PTD */
 
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
 
/* USER CODE END PD */
 
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
 
/* USER CODE END PM */
 
/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;
DMA_HandleTypeDef hdma_spi1_tx;
 
/* USER CODE BEGIN PV */
void FRAM_Init(void);
void FRAM_CS_LOW(void) { GPIOA->BRR = 0x0100; } //PA8 Low
void FRAM_CS_HIGH(void){ GPIOA->BSRR = 0x0100; } //PA8 High
 
void FRAM_WP_LOW(void) { GPIOA->BRR = 0x0020; } //PA5 Low
void FRAM_WP_HIGH(void){ GPIOA->BSRR = 0x0020; } //PA5 High
 
uint8_t buffer_tx[10] = {51,52,53,54,55,56,57,58,39,40};
uint8_t buffer_rx[10];
/* USER CODE END PV */
 
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_SPI1_Init(void);
/* USER CODE BEGIN PFP */
 
/* USER CODE END PFP */
 
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
 
/* USER CODE END 0 */
 
/**
 * @brief The application entry point.
 * @retval int
 */
int main(void)
{
 
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */
 
 /* MCU Configuration--------------------------------------------------------*/
 
 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
 HAL_Init();
 
 /* USER CODE BEGIN Init */
 
 /* USER CODE END Init */
 
 /* Configure the system clock */
 SystemClock_Config();
 
 /* USER CODE BEGIN SysInit */
 
 /* USER CODE END SysInit */
 
 /* Initialize all configured peripherals */
 MX_GPIO_Init();
 MX_DMA_Init();
 MX_SPI1_Init();
 /* USER CODE BEGIN 2 */
 
 /* USER CODE END 2 */
 
 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
 /* USER CODE END WHILE */
 
 /* USER CODE BEGIN 3 */
 FRAMx_Write(&hspi1, 0x0C, &buffer_tx[0], 10,1);
 
HAL_Delay(100);
FRAMx_Read(&hspi1, 0x0C, &buffer_rx[0], 10, 2);
 }
 /* USER CODE END 3 */
}
 
/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void)
{
 RCC_OscInitTypeDef RCC_OscInitStruct = {0};
 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
 /** Configure the main internal regulator output voltage
 */
 HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);
 
 /** Initializes the RCC Oscillators according to the specified parameters
 * in the RCC_OscInitTypeDef structure.
 */
 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
 RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 {
 Error_Handler();
 }
 
 /** Initializes the CPU, AHB and APB buses clocks
 */
 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
 |RCC_CLOCKTYPE_PCLK1;
 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSE;
 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
 {
 Error_Handler();
 }
}
 
/**
 * @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;
 hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
 hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
 hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;
 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_DISABLE;
 if (HAL_SPI_Init(&hspi1) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN SPI1_Init 2 */
 
 /* USER CODE END SPI1_Init 2 */
 
}
 
/**
 * Enable DMA controller clock
 */
static void MX_DMA_Init(void)
{
 
 /* DMA controller clock enable */
 __HAL_RCC_DMA1_CLK_ENABLE();
 
 /* DMA interrupt init */
 /* DMA1_Channel2_3_IRQn interrupt configuration */
 HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0);
 HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
 
}
 
/**
 * @brief GPIO Initialization Function
 * @PAram None
 * @retval None
 */
static void MX_GPIO_Init(void)
{
 GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
 
 /* GPIO Ports Clock Enable */
 __HAL_RCC_GPIOC_CLK_ENABLE();
 __HAL_RCC_GPIOA_CLK_ENABLE();
 
 /*Configure GPIO pin Output Level */
 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET);
 
 /*Configure GPIO pin : PC15 */
 GPIO_InitStruct.Pin = GPIO_PIN_15;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 GPIO_InitStruct.Alternate = GPIO_AF1_OSC;
 HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
 /*Configure GPIO pin : PA8 */
 GPIO_InitStruct.Pin = GPIO_PIN_8;
 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
 
/* USER CODE BEGIN 4 */
void FRAM_Init(void)
{
 FRAM_CS_HIGH();
 FRAM_WP_HIGH();
 MX_SPI1_Init();
 
}
/* 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 */
 

void FRAMx_Write(SPI_HandleTypeDef *hspi, uint16_t write_addr, uint8_t *write_buff, uint16_t bytes, uint32_t Timeout)
{

uint8_t temp[3];
temp[0] = _FRAM_WRITE;
temp[1] = (uint8_t)(write_addr >> 8);
temp[2] = (uint8_t)write_addr;
FRAM_EnableWrite(hspi,Timeout);
HAL_SPI_Transmit_DMA(hspi, temp, 3);

HAL_SPI_Transmit_DMA(hspi, write_buff,10); //sizeof(write_buff));

FRAM_CS_HIGH();
FRAM_WriteProtect(hspi,Timeout);
}

void FRAMx_Read(SPI_HandleTypeDef *hspi, uint16_t read_addr, uint8_t *read_buff, uint16_t bytes,uint32_t Timeout )
{
Byte_var = bytes;
uint8_t temp[3];
temp[0] = _FRAM_READ;
temp[1] = (uint8_t)(read_addr >> 8);
temp[2] = (uint8_t)read_addr;

FRAM_CS_LOW();

HAL_SPI_Transmit_DMA(hspi, temp, 3);

HAL_SPI_Receive(hspi, read_buff, bytes, 1);
FRAM_CS_HIGH();

}

[mƎALLEm]

Hello,

Thanks but in next time please use </> button to paste your code. I edited your comment then ..

+ elaborate about your issue so others can understand you problem.

Thank you.

[gbm]

Use DMA for both transmit and receive unless you only write to memory. Basically, if you use HAL, use TransmitReceive_DMA.

Start by reading this:

https://community.st.com/t5/stm32-mcus-products/regarding-function-calls-when-performing-spi-communication-in/m-p/738412#M265178

[vividhadhengre]

Why is it necessary, to use HAL_SPI_TransmitReceive_DMA only? Why can't we use HAL_SPI_Transmit_DMA and HAL_SPI_Receive function Separately.

[gbm]

Your question is answered in the linked topic. Just read it.