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STM32CubeWL/Projects/NUCLEO-WL55JC/Examples/DMA/DMA_MUX_RequestGen/Src/main.c

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file DMA/DMAMUX_RequestGen/Src/main.c
* @author MCD Application Team
* @brief This example shows how to use the DMA with the DMAMUX to
* request generator using the stm32wlxx HAL API.
******************************************************************************
* @attention
*
* Copyright (c) 2020 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 */
/* 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 ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
__IO uint32_t DMA_TransferErrorFlag = 0;
uint32_t SRC_Buffer_LED2_Toggle[2] =
{ LED2_PIN, /*Value for LED2 ON */
0 /*Value for LED2 OFF */
};
DMA_HandleTypeDef DMA_Handle;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
static void HAL_TransferError(DMA_HandleTypeDef *hdma);
/* 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 */
HAL_DMA_MuxRequestGeneratorConfigTypeDef dmamux_ReqGenParams;
/* 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 */
/* USER CODE BEGIN 2 */
/* -1- Initialize LEDs mounted on NUCLEO-WL55JC RevC board */
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
/*##-2- Configure the DMA ##################################################*/
/* Enable DMA1 clock */
DMAx_CLK_ENABLE();
/* Configure the DMA handler for Transmission process */
/* DMA mode is set to circular for an infinite DMA transfer */
DMA_Handle.Instance = DMA1_Channel1;
DMA_Handle.Init.Request = DMA_REQUEST_GENERATOR0;
DMA_Handle.Init.Direction = DMA_MEMORY_TO_PERIPH;
DMA_Handle.Init.PeriphInc = DMA_PINC_DISABLE;
DMA_Handle.Init.MemInc = DMA_MINC_ENABLE;
DMA_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
DMA_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
DMA_Handle.Init.Mode = DMA_CIRCULAR;
DMA_Handle.Init.Priority = DMA_PRIORITY_LOW;
/* Initialize the DMA with for Transmission process */
HAL_DMA_Init(&DMA_Handle);
/* Register Error Callback */
HAL_DMA_RegisterCallback(&DMA_Handle, HAL_DMA_XFER_ERROR_CB_ID, &HAL_TransferError);
/* NVIC configuration for DMA transfer complete interrupt*/
HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
/*##-3- Configure and enable the DMAMUX Request generator ####################*/
dmamux_ReqGenParams.SignalID = HAL_DMAMUX1_REQ_GEN_EXTI0; /* External request signal is EXTI0 signal */
dmamux_ReqGenParams.Polarity = HAL_DMAMUX_REQ_GEN_RISING; /* External request signal edge is Rising */
dmamux_ReqGenParams.RequestNumber = 1; /* 1 requests on each edge of the external request signal */
HAL_DMAEx_ConfigMuxRequestGenerator(&DMA_Handle, &dmamux_ReqGenParams);
/* NVIC configuration for DMAMUX request generator overrun errors*/
HAL_NVIC_SetPriority(DMAMUX1_OVR_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(DMAMUX1_OVR_IRQn);
HAL_DMAEx_EnableMuxRequestGenerator (&DMA_Handle);
/*##-4- Configure and enable the User push-button (B1) in EXTI mode used as DMA external request signal #####*/
BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
/*##-5- Start the DMA transfer ################################################*/
/* DMA source buffer is SRC_BUFFER_LED2_TOGGLE containing values to be written
to LED2 GPIO ODR register in order to turn LED2 On/Off each time comes a request from the DMAMUX request generator */
HAL_DMA_Start_IT(&DMA_Handle, (uint32_t)SRC_Buffer_LED2_Toggle, (uint32_t)&LED2_GPIO_PORT->ODR, 2);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
if(DMA_TransferErrorFlag != 0)
{
Error_Handler();
}
}
/* 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_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/**
* @brief This function is executed in case of DMA error occurrence.
* @param None
* @retval None
*/
static void HAL_TransferError(DMA_HandleTypeDef *hdma)
{
DMA_TransferErrorFlag = 1;
}
/* 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 */
/* Turn LED3 on */
BSP_LED_On(LED3);
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 */
/* Infinite loop */
while (1)
{
}
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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