/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file DMA/DMAMUX_SYNC/Src/main.c
* @author MCD Application Team
* @brief This example shows how to use the DMA with the DMAMUX to
* synchronize a transfer with LPTIM1 output period 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 ---------------------------------------------------------*/
LPTIM_HandleTypeDef hlptim1;
UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;
/* USER CODE BEGIN PV */
uint8_t TxSyncMessage[] = "\n\r10\n\r09\n\r08\n\r07\n\r06\n\r05\n\r04\n\r03\n\r02\n\r01\n\r00";
/* Size of Transmission buffer */
#define TX_SYNC_MESSAGE_SIZE (COUNTOF(TxSyncMessage) - 1)
uint8_t BriefMessage[] = "This example shows how to use the DMA with the DMAMUX to synchronize a transfer with LPTIM1 output signal.\n\rThe USART1 is used in DMA synchronized mode to send a countdown from 10 to 00 with a period of 2sec \n\r\n\rStart countdown :\n\r";
#define BRIEF_MESSAGE_SIZE (COUNTOF(BriefMessage) - 1)
uint8_t TxEndMessage[] = "\n\r\n\rExample Finished\n\r";
#define TX_END_MESSAGE_SIZE (COUNTOF(TxEndMessage) - 1)
/* 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_LPTIM1_Init(void);
static void MX_USART1_UART_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 */
uint32_t periodValue;
uint32_t pulseValue;
/* 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_LPTIM1_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
/*##-1- Configure LED2 and LED3 ##*/
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
periodValue = (2 * LSE_VALUE)/4; /* Calculate the Timer Autoreload value for 2sec period */
pulseValue = periodValue/2; /* Set the Timer pulse value for 50% duty cycle */
/* Start the timer */
if (HAL_LPTIM_PWM_Start(&hlptim1, periodValue, pulseValue) != HAL_OK)
{
Error_Handler();
}
/*##Send Brief Message with the UART in Polling mode ######################*/
/* Start transmission data through "BriefMessage" buffer */
if(HAL_UART_Transmit(&huart1, (uint8_t*)BriefMessage, BRIEF_MESSAGE_SIZE, HAL_MAX_DELAY )!= HAL_OK)
{
/* Transfer error in transmission process */
Error_Handler();
}
/*## Start the synchronized transmission process #####################################*/
/* Start transmission of the countdown data through "TxSyncMessage" buffer */
if(HAL_UART_Transmit_DMA(&huart1, (uint8_t*)TxSyncMessage, TX_SYNC_MESSAGE_SIZE)!= HAL_OK)
{
/* Transfer error in transmission process */
Error_Handler();
}
/*## Wait for the end of the synchronized transfer ###################################*/
while (HAL_UART_GetState(&huart1) != HAL_UART_STATE_READY)
{
}
/*## Send example ending Message with the UART in Polling mode #####################################*/
/* Start transmission data through "TxEndMessage" buffer */
if(HAL_UART_Transmit(&huart1, (uint8_t*)TxEndMessage, TX_END_MESSAGE_SIZE, HAL_MAX_DELAY )!= HAL_OK)
{
/* Transfer error in transmission process */
Error_Handler();
}
BSP_LED_On(LED2);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* 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();
}
}
/**
* @brief LPTIM1 Initialization Function
* @param None
* @retval None
*/
static void MX_LPTIM1_Init(void)
{
/* USER CODE BEGIN LPTIM1_Init 0 */
/* USER CODE END LPTIM1_Init 0 */
/* USER CODE BEGIN LPTIM1_Init 1 */
/* USER CODE END LPTIM1_Init 1 */
hlptim1.Instance = LPTIM1;
hlptim1.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
hlptim1.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV4;
hlptim1.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
hlptim1.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH;
hlptim1.Init.UpdateMode = LPTIM_UPDATE_ENDOFPERIOD;
hlptim1.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
hlptim1.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
hlptim1.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
if (HAL_LPTIM_Init(&hlptim1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN LPTIM1_Init 2 */
/* USER CODE END LPTIM1_Init 2 */
}
/**
* @brief USART1 Initialization Function
* @param None
* @retval None
*/
static void MX_USART1_UART_Init(void)
{
/* USER CODE BEGIN USART1_Init 0 */
/* USER CODE END USART1_Init 0 */
/* USER CODE BEGIN USART1_Init 1 */
/* USER CODE END USART1_Init 1 */
huart1.Instance = USART1;
huart1.Init.BaudRate = 115200;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_TX_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart1) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART1_Init 2 */
/* USER CODE END USART1_Init 2 */
}
/**
* Enable DMA controller clock
*/
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMAMUX1_CLK_ENABLE();
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Channel1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
/* DMAMUX1_OVR_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMAMUX1_OVR_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMAMUX1_OVR_IRQn);
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOB_CLK_ENABLE();
}
/* 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 */
/* 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 */
/* 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) */
/* Infinite loop */
while (1)
{
}
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */