stm32f205rG,CAN2可以接收，不能发送,CAN1正常

只看该作者 · 2016-9-19 10:40

本帖最后由 john78 于 2016-9-19 10:43 编辑

void CANinit()
{

  GPIO_InitTypeDef  GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  CAN_InitTypeDef       CAN_InitStructure;
  CAN_FilterInitTypeDef  CAN_FilterInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1,ENABLE);  //一定要打开RCC_APB1Periph_CAN1？|,
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN2,ENABLE);  //一定要打开RCC_APB1Periph_CAN1？|,

  NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);


  // CAN GPIOs configuration *************************************************

  // Enable GPIO clock
  //RCC_AHB1PeriphClockCmd(CAN_GPIO_CLK, ENABLE);

  //Connect CAN pins to AF9
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_CAN1);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource12, GPIO_AF_CAN1);

  // Configure CAN RX and TX pins

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

CAN_DeInit(CAN1);
  // CAN cell init

  CAN_InitStructure.CAN_TTCM=DISABLE; //禁止时间除法通讯方式
  CAN_InitStructure.CAN_ABOM=DISABLE; //软件对CAN_MCR寄存器的INRQ位进行置1后清零
  CAN_InitStructure.CAN_AWUM=DISABLE; //睡眠迷失通过清楚CAN_MCR的SLEEP位，右软件唤醒
  CAN_InitStructure.CAN_NART=DISABLE;//DISABLE; //CAN报文执法一次，不管是否成功
  CAN_InitStructure.CAN_RFLM=DISABLE;  //接收FIFO锁定
  CAN_InitStructure.CAN_TXFP=DISABLE;  //标识别符小的报文具有优先级


  CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;//CAN_Mode_LoopBack;// CAN_Mode_Normal;
  CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;

  // CAN Baudrate = 1MBps (CAN clocked at 30 MHz)
  CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
  CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
  CAN_InitStructure.CAN_Prescaler = 2;
  //CAN_Init(CAN1, &CAN_InitStructure);
  CAN_Init(CAN1, &CAN_InitStructure);

  // CAN filter init
  CAN_FilterInitStructure.CAN_FilterNumber = 0;
  CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment = 0;
  CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);

  // Enable FIFO 0 message pending Interrupt
  CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
  //CAN_ITConfig(CAN2, CAN_IT_TME, ENABLE);  //传送中断
  //CAN_ITConfig(CAN1, CAN_IT_EWG|CAN_IT_EPV|CAN_IT_BOF|CAN_IT_LEC|CAN_IT_ERR, ENABLE);


//CN2---------------------------------------------------------------------------------------------
  NVIC_InitStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority =3;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);


  // CAN GPIOs configuration *************************************************

  // Enable GPIO clock
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

  //Connect CAN pins to AF9
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource5, GPIO_AF_CAN2);
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_CAN2);

  // Configure CAN RX and TX pins

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  // CAN configuration *******************************************************
  // Enable CAN clock
  CAN_DeInit(CAN2);

  CAN_StructInit(&CAN_InitStructure);

  CAN_InitStructure.CAN_TTCM=DISABLE; //禁止时间除法通讯方式
  CAN_InitStructure.CAN_ABOM=DISABLE; //软件对CAN_MCR寄存器的INRQ位进行置1后清零
  CAN_InitStructure.CAN_AWUM=DISABLE; //睡眠迷失通过清楚CAN_MCR的SLEEP位，右软件唤醒
  CAN_InitStructure.CAN_NART=DISABLE;//DISABLE; //CAN报文执法一次，不管是否成功
  CAN_InitStructure.CAN_RFLM=DISABLE;  //接收FIFO锁定
  CAN_InitStructure.CAN_TXFP=DISABLE;  //标识别符小的报文具有优先级


  CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;//CAN_Mode_LoopBack;// CAN_Mode_Normal;
  CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;

  // CAN Baudrate = 1MBps (CAN clocked at 30 MHz)
  CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
  CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
  CAN_InitStructure.CAN_Prescaler = 2;
  //CAN_Init(CAN1, &CAN_InitStructure);
  CAN_Init(CAN2, &CAN_InitStructure);

//  CAN_SlaveStartBank(14);
  // CAN filter init
  CAN_FilterInitStructure.CAN_FilterNumber = 27;
  CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment = 0;
  CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);

  // Enable FIFO 0 message pending Interrupt
  CAN_ITConfig(CAN2, CAN_IT_FMP0, ENABLE);
  //CAN_ITConfig(CAN2, CAN_IT_TME, ENABLE);  //传送中断
// CAN_ITConfig(CAN2, CAN_IT_EWG|CAN_IT_EPV|CAN_IT_BOF|CAN_IT_LEC|CAN_IT_ERR, ENABLE);

}

补充
CAN_TransmitStatus(CAN2, TransmitMailbox);-----返回值是0x2