STM32F105RBT6-CAN总线滤波器设置求助

winidd · 发表于 2016-8-24 14:05:08

程序如下,u16 std_id=0X3e7;
u16 msk_id=0X4b2;

void CAN_SetStdFilterIdMsk16(u8 number,u16 ID,u16 Mask)
{
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
/* CAN 过滤器设置 */
CAN_FilterInitStructure.CAN_FilterNumber=number;
CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_16bit;
CAN_FilterInitStructure.CAN_FilterIdHigh=0XFFFF;
CAN_FilterInitStructure.CAN_FilterIdLow=ID<<5;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0XFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow=Mask<<5;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;

CAN_FilterInit(&CAN_FilterInitStructure);
}

void CAN1_Configuration(void)
{
GPIO_InitTypeDef       GPIO_InitStructure;
NVIC_InitTypeDef       NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

// CAN_DISABLE(); //在main函数开canbus

/* PD0-CAN RX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/*pd1-CAN TX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

CAN_SetBps(BPS_500K);
CAN_SetStdFilterIdMsk16(0,std_id,msk_id);
//CAN_SetStdFilterIdLst16(0,0x12,0x13,0x14,0x15);

   NVIC_InitStructure.NVIC_IRQChannel=USB_LP_CAN1_RX0_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
   NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
   NVIC_Init(& NVIC_InitStructure);

   CAN_ITConfig(CAN1, CAN_IT_FMP0|CAN_IT_FF0|CAN_IT_FOV0, ENABLE);
CAN_ITConfig(CAN1, CAN_IT_TME, DISABLE);
}

如上设置接收来自上位机发来的标准Z，只能过滤出std_id=0X3e7,而仿真msk_id=0X4b2不能正常过滤，进不了中断，求大神帮忙分析。折腾了好久

Da Wen · 发表于 2016-8-24 14:05:09

库函数里面过滤器的设置是这样的
8Md0X8I{L{5O9%Y$%]4}8.png

你这里的参数填错了，应该这么填：
void CAN_SetStdFilterIdMsk16(u8 number,u16 ID,u16 Mask)
{
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
/* CAN 过滤器设置 */
      CAN_FilterInitStructure.CAN_FilterNumber=number;
      CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;
      CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_16bit;
      CAN_FilterInitStructure.CAN_FilterIdHigh=Mask<<5;
      CAN_FilterInitStructure.CAN_FilterIdLow=ID<<5;
      CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0XFFFF;
      CAN_FilterInitStructure.CAN_FilterMaskIdLow=0xFFFF;
      CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FIFO0;
      CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;

      CAN_FilterInit(&CAN_FilterInitStructure);
}