STM32 双CAN配置，呼叫用过STM32的，

只看该作者 · 2012-4-10 15:41

各位大侠，你们好，我现在STM32F105的板子上用到了两路CAN,PD0,PD1 配置为CAN1,PB5,PB6配置为CAN2(REMAP了),但现在CAN1正常工作，CAN2就不工作，请问是什么问题，谢谢大家了，CAN2初始化函数如下
void SGL_CAN2_Init(void)
{
NVIC_InitTypeDef    NVIC_InitStructure;
CAN_InitTypeDef       CAN_InitStructure;
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
GPIO_InitTypeDef    GPIO_InitStructure;
/* CAN register init */
CAN_DeInit(CAN2);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN2, ENABLE);
CAN_StructInit(&CAN_InitStructure);
/* CAN cell init */
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_14tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;
CAN_InitStructure.CAN_Prescaler = 8;
CAN_Init(CAN2, &CAN_InitStructure);
/* CAN filter init */
CAN_FilterInitStructure.CAN_FilterNumber = 14;
CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000; //(((SGL_CAN1_MaskRcvID<<3)&0xFFFF0000)>>16);
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000; //(((SGL_CAN1_MaskRcvID<<3)|CAN_ID_EXT|CAN_RTR_DATA)&0xFFFF);
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000; //0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000; //0xFFFF;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
/* Configure CAN pin: RX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure CAN pin: TX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinRemapConfig(GPIO_Remap_CAN2, ENABLE);
CAN_ITConfig(CAN2, CAN_IT_FMP0, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 6;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

只看该作者 · 2012-4-10 15:45

CAN1初始化部分如下，
void SGL_CAN1_Init(void)
{
   NVIC_InitTypeDef    NVIC_InitStructure;
CAN_InitTypeDef       CAN_InitStructure;
CAN_FilterInitTypeDef  CAN_FilterInitStructure;
GPIO_InitTypeDef    GPIO_InitStructure;
/* CAN register init */
CAN_DeInit(CAN1);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
CAN_StructInit(&CAN_InitStructure);
/* CAN cell init */
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = DISABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1 = CAN_BS1_14tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_3tq;
CAN_InitStructure.CAN_Prescaler = 8;
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; //(((SGL_CAN1_MaskRcvID<<3)&0xFFFF0000)>>16);
CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000; //(((SGL_CAN1_MaskRcvID<<3)|CAN_ID_EXT|CAN_RTR_DATA)&0xFFFF);
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000; //0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000; //0xFFFF;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
/* Configure CAN pin: RX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* Configure CAN pin: TX */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_PinRemapConfig(GPIO_Remap2_CAN1, ENABLE);
CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 6;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}