同一块板子上的CAN1与CAN2进行通信，CAN1在正常模式下可以发送以及接收，CAN2只能发送不能接收

您好，下列附件为CAN2的收发例程，你可以参考下。

CH32V307 CAN2.zip

谢谢

也不行，CAN2只能发送成功，没法接收

请问你的CAN2接收问题解决了吗？

您好，参考2楼附件例程，都是测试过没有问题的

can2 查询的方式可以接受，中断的方式接收不了信息，会不会中断配置错误?

void CAN2_RX0_IRQHandler (void) __attribute__((interrupt("WCH-Interrupt-fast")));

/****************************模块CAN初始化****************************************/

void Mod_Can_Init(void)

{

CAN_DeInit(CAN2);

?RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

?RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN2, ENABLE);

?GPIO_InitTypeDef GPIO_InitStructure;

?CAN_InitTypeDef? CAN_InitSturctureTypeDef;

?CAN_FilterInitTypeDef CAN_FilterInitStructure;

?NVIC_InitTypeDef? NVIC_InitTypeDefStructure;

?GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;

?GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

?GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

?GPIO_Init(GPIOB, &GPIO_InitStructure);

?GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;

?GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

?GPIO_Init(GPIOB, &GPIO_InitStructure);

?CAN_InitSturctureTypeDef.CAN_TTCM = DISABLE;

?CAN_InitSturctureTypeDef.CAN_TXFP = DISABLE;

?CAN_InitSturctureTypeDef.CAN_ABOM = DISABLE;

?CAN_InitSturctureTypeDef.CAN_AWUM = DISABLE;

?CAN_InitSturctureTypeDef.CAN_NART = ENABLE;

?CAN_InitSturctureTypeDef.CAN_RFLM = DISABLE;

?CAN_InitSturctureTypeDef.CAN_Mode = CAN_Mode_Normal;

?CAN_InitSturctureTypeDef.CAN_SJW =? CAN_SJW_1tq;

?CAN_InitSturctureTypeDef.CAN_BS1 =? CAN_BS1_5tq;

?CAN_InitSturctureTypeDef.CAN_BS2 =? CAN_BS1_3tq;

?CAN_InitSturctureTypeDef.CAN_Prescaler = 64;? ? ? ?

?CAN_Init(CAN2, &CAN_InitSturctureTypeDef);

?CAN_FilterInitStructure.CAN_FilterNumber = 0;? ? ? ? ?// 滤波器组

?CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;

?CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;

?MReceiveID = ModO_Rx_ID;

?CAN_FilterInitStructure.CAN_FilterIdHigh =(MReceiveID<<3)&0xFFFF0000;

?CAN_FilterInitStructure.CAN_FilterIdLow = ((MReceiveID<<3)|CAN_ID_EXT|CAN_RTR_DATA)&0xFFFF;

?CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;

?CAN_FilterInitStructure.CAN_FilterMaskIdLow =? 0x0000;

?CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FilterFIFO0;

?CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;

?CAN_FilterInit(&CAN_FilterInitStructure);

?NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

?NVIC_InitTypeDefStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;

?NVIC_InitTypeDefStructure.NVIC_IRQChannelPreemptionPriority =? 1;

?NVIC_InitTypeDefStructure.NVIC_IRQChannelSubPriority = 1;

?NVIC_InitTypeDefStructure.NVIC_IRQChannelCmd = ENABLE;

?NVIC_Init(&NVIC_InitTypeDefStructure);

?CAN_ITConfig(CAN2, CAN_IT_FF0|CAN_IT_FF1, ENABLE);

?CAN_ClearITPendingBit(CAN2,CAN_IT_FF0|CAN_IT_FF1);

}

void Mod_Data_Init(void)

{

?ModRxCurT? = 0;

?ModRxCurH = 0;

?Mod.mdSendToAlarm = AlarmGetValFromMod;

?Mod.mdSendToLcd = lcdGetValFromMod;

?Mod.Cmd = 0;

}

/************************can接受中断************************************/

void CAN2_RX0_IRQHandler(void)

{

?if(CAN_GetITStatus(CAN2, CAN_IT_FF0) == SET)

?{

? ?ModRxCurT++;

? ?if(ModRxCurT>=10)

? ?ModRxCurT = 0;

? ?CAN_ClearITPendingBit(CAN2,CAN_IT_FF0);

? ?printf("Can2中断触发1");

? ?if( CAN_MessagePending( CAN2, CAN_FIFO0 ) == 0)

? ? ?return;

? ? CAN_Receive(CAN2,CAN_FIFO0, &MRxMessage[ModRxCurT]);

? }

? if(CAN_GetITStatus(CAN2, CAN_IT_FF1) == SET )

?{

? ? ModRxCurT++;

? ? if(ModRxCurT>=10)

? ? ?ModRxCurT = 0;

? ? ?CAN_ClearITPendingBit(CAN2,CAN_IT_FF1);

? ? ?printf("Can2中断触发2");

? ? ?if( CAN_MessagePending( CAN2, CAN_FIFO1 ) == 0)

? ? ? ?return;

? ? ?CAN_Receive(CAN2,CAN_FIFO1, &MRxMessage[ModRxCurT]);

?}

}

您好，附件为CAN2中断接收例程，可以参考一下

CH32V307 CAN2 中断接收.zip

您好！ 程序已经测试，第一次下载正常，能够打印中断信息，但是多次下载程序后，CAN2中断无法接收信息，开启了程序的can2发送，通信正常，依然无法中断接收信息。

您好，正常情况下，第一次下载正常运行，后面下载应该也不会有问题的，可检查一下工程以及下载文件是否被改变。相关问题这边工程师也已和你沟通过，附件为测试例程，若有需要，可再次下载测试一下

CH32V307 CAN2中断.zip

您好，我有一个问题，2楼的CAN查询接收发送例程中，为什么CAN2的例程都不需要设置ID过滤呢？我看函数里面都是对CAN1的寄存器操作。我通过什么来确定，数据是接收到CAN_FIFO0还是CAN_FIFO1呢？？