mirror of
https://github.com/STMicroelectronics/STM32CubeF3.git
synced 2025-05-07 19:29:11 +08:00
389 lines
11 KiB
C
389 lines
11 KiB
C
/**
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******************************************************************************
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* @file UART/UART_TwoBoards_ComDMA/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use UART HAL API to transmit
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* and receive a data buffer with a communication process based on
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* DMA transfer.
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* The communication is done using 2 Boards.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F3xx_HAL_Examples
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* @{
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*/
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/** @addtogroup UART_TwoBoards_ComDMA
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define TRANSMITTER_BOARD
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* UART handler declaration */
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UART_HandleTypeDef UartHandle;
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__IO ITStatus UartReady = RESET;
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__IO uint32_t UserButtonStatus = 0; /* set to 1 after User Button interrupt */
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/* Buffer used for transmission */
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uint8_t aTxBuffer[] = " ****UART_TwoBoards communication based on DMA**** ****UART_TwoBoards communication based on DMA**** ****UART_TwoBoards communication based on DMA**** ";
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/* Buffer used for reception */
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uint8_t aRxBuffer[RXBUFFERSIZE];
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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static void Error_Handler(void);
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static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F3xx HAL library initialization:
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- Configure the Flash prefetch
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- Configure the Systick to generate an interrupt each 1 msec
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/* Configure the system clock to 64 MHz */
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SystemClock_Config();
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/* Configure LED1, LED2 and LED3 */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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#ifdef TRANSMITTER_BOARD
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/* Configure User push-button in Interrupt mode */
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BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI);
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/* Wait for User push-button press before starting the Communication.
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In the meantime, LED3 is blinking */
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while(UserButtonStatus == 0)
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{
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/* Toggle LED3*/
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BSP_LED_Toggle(LED3);
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HAL_Delay(100);
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}
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BSP_LED_Off(LED3);
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#endif
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/*##-1- Configure the UART peripheral ######################################*/
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/* Put the USART peripheral in the Asynchronous mode (UART Mode) */
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/* UART configured as follows:
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- Word Length = 8 Bits
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- Stop Bit = One Stop bit
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- Parity = None
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- BaudRate = 9600 baud
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- Hardware flow control disabled (RTS and CTS signals) */
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UartHandle.Instance = USARTx;
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UartHandle.Init.BaudRate = 9600;
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UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
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UartHandle.Init.StopBits = UART_STOPBITS_1;
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UartHandle.Init.Parity = UART_PARITY_NONE;
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UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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UartHandle.Init.Mode = UART_MODE_TX_RX;
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UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
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if(HAL_UART_DeInit(&UartHandle) != HAL_OK)
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{
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Error_Handler();
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}
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if(HAL_UART_Init(&UartHandle) != HAL_OK)
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{
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Error_Handler();
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}
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#ifdef TRANSMITTER_BOARD
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/* The board sends the message and expects to receive it back */
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/* DMA is programmed for reception before starting the transmission, in order to
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be sure DMA Rx is ready when board 2 will start transmitting */
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/*##-2- Program the Reception process #####################################*/
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if(HAL_UART_Receive_DMA(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
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{
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Error_Handler();
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}
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/*##-3- Start the transmission process #####################################*/
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/* While the UART in reception process, user can transmit data through
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"aTxBuffer" buffer */
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if(HAL_UART_Transmit_DMA(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
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{
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Error_Handler();
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}
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/*##-4- Wait for the end of the transfer ###################################*/
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while (UartReady != SET)
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{
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}
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/* Reset transmission flag */
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UartReady = RESET;
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#else
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/* The board receives the message and sends it back */
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/*##-2- Put UART peripheral in reception process ###########################*/
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if(HAL_UART_Receive_DMA(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
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{
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Error_Handler();
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}
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/*##-3- Wait for the end of the transfer ###################################*/
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/* While waiting for message to come from the other board, LED3 is
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blinking according to the following pattern: a double flash every half-second */
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while (UartReady != SET)
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{
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BSP_LED_On(LED3);
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HAL_Delay(100);
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BSP_LED_Off(LED3);
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HAL_Delay(100);
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BSP_LED_On(LED3);
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HAL_Delay(100);
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BSP_LED_Off(LED3);
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HAL_Delay(500);
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}
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/* Reset transmission flag */
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UartReady = RESET;
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BSP_LED_Off(LED3);
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/*##-4- Start the transmission process #####################################*/
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/* While the UART in reception process, user can transmit data through
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"aTxBuffer" buffer */
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if(HAL_UART_Transmit_DMA(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
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{
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Error_Handler();
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}
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#endif /* TRANSMITTER_BOARD */
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/*##-5- Wait for the end of the transfer ###################################*/
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while (UartReady != SET)
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{
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}
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/* Reset transmission flag */
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UartReady = RESET;
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/*##-6- Compare the sent and received buffers ##############################*/
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if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,RXBUFFERSIZE))
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{
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Error_Handler();
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}
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/* Turn on LED2 if test passes then enter infinite loop */
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BSP_LED_On(LED2);
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/* Infinite loop */
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSI)
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* SYSCLK(Hz) = 64000000
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* HCLK(Hz) = 64000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 2
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* APB2 Prescaler = 1
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* HSI Frequency(Hz) = 8000000
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* PREDIV = RCC_PREDIV_DIV2 (2)
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* PLLMUL = RCC_PLL_MUL16 (16)
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* Flash Latency(WS) = 2
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* @param None
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* HSI Oscillator already ON after system reset, activate PLL with HSI as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_NONE;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
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RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV2;
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RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL16;
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RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2)!= HAL_OK)
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{
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/* Initialization Error */
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while(1);
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}
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}
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/**
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* @brief Tx Transfer completed callback
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* @param UartHandle: UART handle.
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* @note This example shows a simple way to report end of DMA Tx transfer, and
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* you can add your own implementation.
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* @retval None
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*/
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void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
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{
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/* Set transmission flag: trasfer complete*/
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UartReady = SET;
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/* Turn LED1 on: Transfer in transmission process is correct */
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BSP_LED_On(LED1);
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}
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/**
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* @brief Rx Transfer completed callback
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* @param UartHandle: UART handle
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* @note This example shows a simple way to report end of DMA Rx transfer, and
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* you can add your own implementation.
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* @retval None
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*/
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void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
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{
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/* Set transmission flag: trasfer complete*/
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UartReady = SET;
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/* Turn LED1 on: Transfer in reception process is correct */
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BSP_LED_On(LED1);
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}
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/**
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* @brief UART error callbacks
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* @param UartHandle: UART handle
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* @note This example shows a simple way to report transfer error, and you can
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* add your own implementation.
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* @retval None
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*/
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void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
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{
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Error_Handler();
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}
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/**
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* @brief EXTI line detection callbacks
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* @param GPIO_Pin: Specifies the pins connected EXTI line
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* @retval None
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*/
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void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
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{
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if(GPIO_Pin == USER_BUTTON_PIN)
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{
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UserButtonStatus = 1;
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}
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}
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/**
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* @brief Compares two buffers.
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* @param pBuffer1, pBuffer2: buffers to be compared.
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* @param BufferLength: buffer's length
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* @retval 0 : pBuffer1 identical to pBuffer2
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* >0 : pBuffer1 differs from pBuffer2
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*/
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static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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{
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while (BufferLength--)
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{
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if ((*pBuffer1) != *pBuffer2)
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{
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return BufferLength;
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}
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pBuffer1++;
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pBuffer2++;
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}
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return 0;
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED1 on */
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BSP_LED_On(LED1);
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while(1)
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{
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/* Error if LED1 is slowly blinking (1 sec. period) */
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BSP_LED_Toggle(LED1);
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HAL_Delay(1000);
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t* file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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