/* 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 */