mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
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313 lines
9.4 KiB
C
313 lines
9.4 KiB
C
/**
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******************************************************************************
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* @file CAN/CAN_LoopBack/Src/main.c
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* @author MCD Application Team
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* @brief This example provides a description of how to set a communication
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* with the CAN in loopback mode.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 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 STM32F4xx_HAL_Examples
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* @{
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*/
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/** @addtogroup CAN_LoopBack
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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CAN_HandleTypeDef CanHandle;
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CAN_TxHeaderTypeDef TxHeader;
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CAN_RxHeaderTypeDef RxHeader;
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uint8_t TxData[8];
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uint8_t RxData[8];
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uint32_t TxMailbox;
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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static HAL_StatusTypeDef CAN_Polling(void);
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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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/* STM32F4xx HAL library initialization:
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- Configure the Flash prefetch, instruction and Data caches
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization: global MSP (MCU Support Package) initialization
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*/
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HAL_Init();
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/* Configure the system clock to 180 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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if(CAN_Polling() == HAL_OK)
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{
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/* OK: Turn on LED1 */
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BSP_LED_On(LED1);
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}
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else
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{
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/* KO: Turn on LED2 */
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BSP_LED_On(LED2);
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}
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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 Configures the CAN, transmit and receive by polling
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* @param None
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* @retval PASSED if the reception is well done, FAILED in other case
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*/
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HAL_StatusTypeDef CAN_Polling(void)
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{
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CAN_FilterTypeDef sFilterConfig;
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/*##-1- Configure the CAN peripheral #######################################*/
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CanHandle.Instance = CANx;
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CanHandle.Init.TimeTriggeredMode = DISABLE;
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CanHandle.Init.AutoBusOff = DISABLE;
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CanHandle.Init.AutoWakeUp = DISABLE;
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CanHandle.Init.AutoRetransmission = ENABLE;
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CanHandle.Init.ReceiveFifoLocked = DISABLE;
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CanHandle.Init.TransmitFifoPriority = DISABLE;
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CanHandle.Init.Mode = CAN_MODE_LOOPBACK;
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CanHandle.Init.SyncJumpWidth = CAN_SJW_1TQ;
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CanHandle.Init.TimeSeg1 = CAN_BS1_6TQ;
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CanHandle.Init.TimeSeg2 = CAN_BS2_2TQ;
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CanHandle.Init.Prescaler = 5;
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if(HAL_CAN_Init(&CanHandle) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- Configure the CAN Filter ###########################################*/
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sFilterConfig.FilterBank = 0;
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sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
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sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
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sFilterConfig.FilterIdHigh = 0x0000;
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sFilterConfig.FilterIdLow = 0x0000;
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sFilterConfig.FilterMaskIdHigh = 0x0000;
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sFilterConfig.FilterMaskIdLow = 0x0000;
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sFilterConfig.FilterFIFOAssignment = CAN_RX_FIFO0;
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sFilterConfig.FilterActivation = ENABLE;
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sFilterConfig.SlaveStartFilterBank = 14;
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if(HAL_CAN_ConfigFilter(&CanHandle, &sFilterConfig) != HAL_OK)
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{
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/* Filter configuration Error */
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Error_Handler();
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}
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/*##-3- Start the CAN peripheral ###########################################*/
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if (HAL_CAN_Start(&CanHandle) != HAL_OK)
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{
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/* Start Error */
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Error_Handler();
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}
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/*##-4- Start the Transmission process #####################################*/
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TxHeader.StdId = 0x11;
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TxHeader.RTR = CAN_RTR_DATA;
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TxHeader.IDE = CAN_ID_STD;
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TxHeader.DLC = 2;
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TxHeader.TransmitGlobalTime = DISABLE;
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TxData[0] = 0xCA;
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TxData[1] = 0xFE;
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/* Request transmission */
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if(HAL_CAN_AddTxMessage(&CanHandle, &TxHeader, TxData, &TxMailbox) != HAL_OK)
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{
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/* Transmission request Error */
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Error_Handler();
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}
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/* Wait transmission complete */
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while(HAL_CAN_GetTxMailboxesFreeLevel(&CanHandle) != 3) {}
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/*##-5- Start the Reception process ########################################*/
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if(HAL_CAN_GetRxFifoFillLevel(&CanHandle, CAN_RX_FIFO0) != 1)
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{
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/* Reception Missing */
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Error_Handler();
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}
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if(HAL_CAN_GetRxMessage(&CanHandle, CAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
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{
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/* Reception Error */
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Error_Handler();
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}
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if((RxHeader.StdId != 0x11) ||
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(RxHeader.RTR != CAN_RTR_DATA) ||
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(RxHeader.IDE != CAN_ID_STD) ||
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(RxHeader.DLC != 2) ||
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((RxData[0]<<8 | RxData[1]) != 0xCAFE))
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{
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/* Rx message Error */
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return HAL_ERROR;
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}
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return HAL_OK; /* Test Passed */
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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 (HSE)
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* SYSCLK(Hz) = 180000000
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* HCLK(Hz) = 180000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 25000000
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* PLL_M = 25
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* PLL_N = 360
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* PLL_P = 2
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* PLL_Q = 7
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* PLL_R = 6
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 5
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* @param None
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* @retval None
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*/
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static 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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HAL_StatusTypeDef ret = HAL_OK;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 25;
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RCC_OscInitStruct.PLL.PLLN = 360;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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RCC_OscInitStruct.PLL.PLLR = 6;
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ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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/* Activate the OverDrive to reach the 180 MHz Frequency */
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ret = HAL_PWREx_EnableOverDrive();
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if(ret != HAL_OK)
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{
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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 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_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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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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/* User may add here some code to deal with this error */
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/* Turn LED3 on */
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BSP_LED_On(LED3);
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while(1)
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{
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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(char *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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