STM32_CAN总线使用说明.pdf

STM32F103***的的CAN 总线总线使用说明使用说明 的的 总线总线使用说明使用说明 1. 配置配置CAN 时钟时钟、映射、映射、、IO 口口 配置配置 时钟时钟、、映射映射、、 口口 RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE); GPIO_PinRemapConfig(GPIO_Remap1_CAN1,ENABLE); //打开对应IO /* Configure CAN pin: RX */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOB, GPIO_InitStructure); /* Configure CAN pin: TX */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, GPIO_InitStructure); 2.使能使能CAN 中断向量中断向量 使能使能 中断向量中断向量 NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(NVIC_InitStructure); 3.CAN 硬件寄存器配置初始化硬件寄存器配置初始化 硬件寄存器配置初始化硬件寄存器配置初始化 CAN_DeInit(CAN1); //与2.0 库有区别； CAN_StructInit(CAN_InitStructure); CAN_InitStructure.CAN_TTCM=DISABLE; CAN_InitStructure.CAN_ABOM=ENABLE; //总线断开后自动修复； CAN_InitStructure.CAN_AWUM=DISABLE; CAN_InitStructure.CAN_NART=DISABLE; CAN_InitStructure.CAN_RFLM=DISABLE; CAN_InitStructure.CAN_TXFP=DISABLE; CAN_InitStructure.CAN_Mode=CAN_Mode_LoopBack;//CAN_Mode_Silent;//CAN_Mode_ Normal;//CAN_Mode_LoopBack;// CAN_InitStructure.CAN_SJW=CAN_SJW_1tq; CAN_InitStructure.CAN_BS1=CAN_BS1_6tq; CAN_InitStructure.CAN_BS2=CAN_BS2_4tq; CAN_InitStructure.CAN_Prescaler=CAN_100k_Prescaler; CAN_Init(CAN1, CAN_InitStructure); 4.过滤器初始化过滤器初始化 过滤器初始化过滤器初始化 CAN_FilterInitStructure.CAN_FilterNumber=0; CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;//CAN_Fil