480 lines
13 KiB
C
480 lines
13 KiB
C
/* USER CODE BEGIN Header */
|
|
/**
|
|
******************************************************************************
|
|
* @file UART/UART_TwoBoards_ComDMA/Src/main.c
|
|
* @author MCD Application Team
|
|
* @brief This sample code shows how to use UART HAL API to transmit
|
|
* and receive a data buffer with a communication process based on
|
|
* DMA transfer.
|
|
* The communication is done using 2 Boards.
|
|
******************************************************************************
|
|
* @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 */
|
|
#define TRANSMITTER_BOARD
|
|
/* USER CODE END PD */
|
|
|
|
/* Private macro -------------------------------------------------------------*/
|
|
/* USER CODE BEGIN PM */
|
|
|
|
/* USER CODE END PM */
|
|
|
|
/* Private variables ---------------------------------------------------------*/
|
|
UART_HandleTypeDef huart1;
|
|
DMA_HandleTypeDef hdma_usart1_rx;
|
|
DMA_HandleTypeDef hdma_usart1_tx;
|
|
|
|
/* USER CODE BEGIN PV */
|
|
__IO ITStatus UartReady = RESET;
|
|
__IO uint32_t UserButtonStatus = 0; /* set to 1 after User Button interrupt */
|
|
|
|
/* Buffer used for transmission */
|
|
uint8_t aTxBuffer[] = " ****UART_TwoBoards communication based on DMA**** ****UART_TwoBoards communication based on DMA**** ****UART_TwoBoards communication based on DMA**** ";
|
|
|
|
/* Buffer used for reception */
|
|
uint8_t aRxBuffer[RXBUFFERSIZE];
|
|
|
|
/* 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_USART1_UART_Init(void);
|
|
/* USER CODE BEGIN PFP */
|
|
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
|
|
|
|
/* 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 */
|
|
/* STM32WLxx HAL library initialization:
|
|
- Configure the Flash prefetch
|
|
- Systick timer is configured by default as source of time base, but user
|
|
can eventually implement his proper time base source (a general purpose
|
|
timer for example or other time source), keeping in mind that Time base
|
|
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
|
|
handled in milliseconds basis.
|
|
- Set NVIC Group Priority to 4
|
|
- Low Level Initialization
|
|
*/
|
|
/* 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_USART1_UART_Init();
|
|
/* USER CODE BEGIN 2 */
|
|
|
|
/* Configure LED1 and LED3 */
|
|
BSP_LED_Init(LED1);
|
|
BSP_LED_Init(LED3);
|
|
|
|
#ifdef TRANSMITTER_BOARD
|
|
/* Configure User push-button (B1) in Interrupt mode */
|
|
BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
|
|
|
|
/* Wait for User push-button (B1) press before starting the Communication.
|
|
In the meantime, LED1 is blinking */
|
|
while (UserButtonStatus == 0)
|
|
{
|
|
/* Toggle LED1*/
|
|
BSP_LED_Toggle(LED1);
|
|
HAL_Delay(100);
|
|
}
|
|
|
|
BSP_LED_Off(LED1);
|
|
#endif
|
|
|
|
#ifdef TRANSMITTER_BOARD
|
|
|
|
/* The board sends the message and expects to receive it back */
|
|
/* DMA is programmed for reception before starting the transmission, in order to
|
|
be sure DMA Rx is ready when board 2 will start transmitting */
|
|
|
|
/*##-2- Program the Reception process #####################################*/
|
|
if (HAL_UART_Receive_DMA(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/*##-3- Start the transmission process #####################################*/
|
|
/* While the UART in reception process, user can transmit data through
|
|
"aTxBuffer" buffer */
|
|
if (HAL_UART_Transmit_DMA(&huart1, (uint8_t *)aTxBuffer, TXBUFFERSIZE) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/*##-4- Wait for the end of the transfer ###################################*/
|
|
while (UartReady != SET)
|
|
{
|
|
}
|
|
|
|
/* Reset transmission flag */
|
|
UartReady = RESET;
|
|
|
|
#else
|
|
|
|
/* The board receives the message and sends it back */
|
|
|
|
/*##-2- Put UART peripheral in reception process ###########################*/
|
|
if (HAL_UART_Receive_DMA(&huart1, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/*##-3- Wait for the end of the transfer ###################################*/
|
|
/* While waiting for message to come from the other board, LED1 is
|
|
blinking according to the following pattern: a double flash every half-second */
|
|
while (UartReady != SET)
|
|
{
|
|
BSP_LED_On(LED1);
|
|
HAL_Delay(100);
|
|
BSP_LED_Off(LED1);
|
|
HAL_Delay(100);
|
|
BSP_LED_On(LED1);
|
|
HAL_Delay(100);
|
|
BSP_LED_Off(LED1);
|
|
HAL_Delay(500);
|
|
}
|
|
|
|
/* Reset transmission flag */
|
|
UartReady = RESET;
|
|
BSP_LED_Off(LED1);
|
|
|
|
/*##-4- Start the transmission process #####################################*/
|
|
/* While the UART in reception process, user can transmit data through
|
|
"aTxBuffer" buffer */
|
|
if (HAL_UART_Transmit_DMA(&huart1, (uint8_t *)aTxBuffer, TXBUFFERSIZE) != HAL_OK)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
#endif /* TRANSMITTER_BOARD */
|
|
|
|
/*##-5- Wait for the end of the transfer ###################################*/
|
|
while (UartReady != SET)
|
|
{
|
|
}
|
|
|
|
/* Reset transmission flag */
|
|
UartReady = RESET;
|
|
|
|
/*##-6- Compare the sent and received buffers ##############################*/
|
|
if (Buffercmp((uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, RXBUFFERSIZE))
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
/* Turn on LED1 if test passes then enter infinite loop */
|
|
BSP_LED_On(LED1);
|
|
|
|
/* 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_8;
|
|
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
|
|
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
|
|
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
|
|
RCC_OscInitStruct.PLL.PLLN = 24;
|
|
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
|
|
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
|
|
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
|
|
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_PLLCLK;
|
|
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 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 = 9600;
|
|
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_Channel4_IRQn interrupt configuration */
|
|
HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
|
|
HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
|
|
/* DMA1_Channel5_IRQn interrupt configuration */
|
|
HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
|
|
HAL_NVIC_EnableIRQ(DMA1_Channel5_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 */
|
|
|
|
/**
|
|
* @brief Tx Transfer completed callback
|
|
* @param UartHandle: UART handle.
|
|
* @note This example shows a simple way to report end of DMA Tx transfer, and
|
|
* you can add your own implementation.
|
|
* @retval None
|
|
*/
|
|
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
|
|
{
|
|
/* Set transmission flag: transfer complete */
|
|
UartReady = SET;
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Rx Transfer completed callback
|
|
* @param UartHandle: UART handle
|
|
* @note This example shows a simple way to report end of DMA Rx transfer, and
|
|
* you can add your own implementation.
|
|
* @retval None
|
|
*/
|
|
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
|
|
{
|
|
/* Set transmission flag: transfer complete */
|
|
UartReady = SET;
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief UART error callbacks
|
|
* @param UartHandle: UART handle
|
|
* @note This example shows a simple way to report transfer error, and you can
|
|
* add your own implementation.
|
|
* @retval None
|
|
*/
|
|
void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
|
|
{
|
|
Error_Handler();
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief EXTI line detection callbacks
|
|
* @param GPIO_Pin: Specifies the pins connected EXTI line
|
|
* @retval None
|
|
*/
|
|
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
|
|
{
|
|
if (GPIO_Pin == BUTTON_SW1_PIN)
|
|
{
|
|
UserButtonStatus = 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Compares two buffers.
|
|
* @param pBuffer1, pBuffer2: buffers to be compared.
|
|
* @param BufferLength: buffer's length
|
|
* @retval 0 : pBuffer1 identical to pBuffer2
|
|
* >0 : pBuffer1 differs from pBuffer2
|
|
*/
|
|
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength)
|
|
{
|
|
while (BufferLength--)
|
|
{
|
|
if ((*pBuffer1) != *pBuffer2)
|
|
{
|
|
return BufferLength;
|
|
}
|
|
pBuffer1++;
|
|
pBuffer2++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* 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 */
|
|
/* 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 */
|