用两块stm板子调can，采用中断接收，发送没有问题，为什么中断接收那块总是感觉进不去中断啊？

zhanghongyin

用两块stm板子调can，开始采用轮询方式，很轻松就成功了，接着使用中断方式，发送没有问题，为什么总是接受不到啊？

[mw_shl_code=c,true] void GPIO_CAN_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; /* Configure CAN pin: RX */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure CAN pin: TX */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); } void CAN_Interrupt(void) { CAN_InitTypeDef CAN_InitStructure; CAN_FilterInitTypeDef CAN_FilterInitStructure; /* CAN register init */ CAN_DeInit(CAN1); 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=DISABLE; CAN_InitStructure.CAN_Mode=CAN_Mode_Normal; CAN_InitStructure.CAN_SJW=CAN_SJW_1tq; CAN_InitStructure.CAN_BS1=CAN_BS1_9tq; CAN_InitStructure.CAN_BS2=CAN_BS2_8tq; CAN_InitStructure.CAN_Prescaler=4; CAN_Init(CAN1 , &CAN_InitStructure); /* CAN filter init */ CAN_FilterInitStructure.CAN_FilterNumber=1; 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=CAN_FIFO0; CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; CAN_FilterInit(&CAN_FilterInitStructure); CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE); //中断使能 /* transmit */ TxMessage1.StdId=0x11; TxMessage1.RTR=CAN_RTR_DATA; TxMessage1.IDE=CAN_ID_STD; TxMessage1.DLC=8; TxMessage1.Data[7]=0x01; TxMessage1.Data[6]=0x01; TxMessage1.Data[5]=0x01; TxMessage1.Data[4]=0x01; TxMessage1.Data[3]=0x01; TxMessage1.Data[2]=0x01; TxMessage1.Data[1]=0x01; TxMessage1.Data[0]=0x01; [/mw_shl_code]

这是我发送部分的代码，示波器显示没有问题，

[mw_shl_code=c,true]static void CAN_NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; /* Enable CAN1 RX0 interrupt IRQ channel */ NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; // 主优先级为0 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // 次优先级为0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } TestStatus CAN_Interrupt(void) { CAN_InitTypeDef CAN_InitStructure; CAN_FilterInitTypeDef CAN_FilterInitStructure; uint32_t i = 0; /* CAN register init */ CAN_DeInit(CAN1); CAN_StructInit(&CAN_InitStructure); /* CAN cell init */ CAN_InitStructure.CAN_TTCM=DISABLE; // 时间触发通信禁止 CAN_InitStructure.CAN_ABOM=DISABLE; // 离线退出是在中断置位清0后退出 CAN_InitStructure.CAN_AWUM=DISABLE; // 自动唤醒模式：清零sleep CAN_InitStructure.CAN_NART=DISABLE; // 自动重新传送豹纹，知道发送成功 CAN_InitStructure.CAN_RFLM=DISABLE; // FIFO没有锁定，新报文覆盖旧报文 CAN_InitStructure.CAN_TXFP=DISABLE; // 发送报文优先级确定：标志符 CAN_InitStructure.CAN_Mode=CAN_Mode_Normal; CAN_InitStructure.CAN_SJW=CAN_SJW_1tq; // 1tq、BS1、BS2的值跟波特率有关 CAN_InitStructure.CAN_BS1=CAN_BS1_9tq; CAN_InitStructure.CAN_BS2=CAN_BS2_8tq; CAN_InitStructure.CAN_Prescaler=4; // 分频系数为1 CAN_Init(CAN1, &CAN_InitStructure); // 初始化CAN1 /* 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); /* CAN FIFO0 message pending interrupt enable */ CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE); //中断使能 } void USB_LP_CAN1_RX0_IRQHandler(void) { CanRxMsg RxMessage; RxMessage.StdId=0x00; RxMessage.IDE=CAN_ID_EXT; RxMessage.DLC=0; RxMessage.FMI=0; RxMessage.Data[0]=0x00; RxMessage.Data[1]=0x00; RxMessage.Data[2]=0x00; RxMessage.Data[3]=0x00; RxMessage.Data[4]=0x00; RxMessage.Data[5]=0x00; RxMessage.Data[6]=0x00; RxMessage.Data[7]=0x00; CAN_Receive(CAN1, CAN_FIFO0, &RxMessage); rec_1=RxMessage.Data[0]; rec_2=RxMessage.Data[1]; rec_3=RxMessage.Data[2]; rec_4=RxMessage.Data[3]; rec_5=RxMessage.Data[4]; rec_6=RxMessage.Data[5]; rec_7=RxMessage.Data[6]; rec_8=RxMessage.Data[7]; }[/mw_shl_code]

这是我中断接受部分的代码，不知道问题出在哪，麻烦论坛里的大神帮忙看一下吧。

正点原子

参考:http://www.openedv.com/posts/list/13176.htm

正点原子

没有中断分组.
加上这个试试:

[mw_shl_code=c,true] NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; // 主优先级为1 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; // 次优先级为0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);[/mw_shl_code]

zhanghongyin

回复【2楼】正点原子:
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是发送部分加中断还是接收加中断？接收的话我前面四句不是中断分组么？

正点原子

回复【3楼】zhanghongyin:
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接收部分，不好意思，没看到。
你参考下我们战舰板的库函数版本CAN例程。可以支持中断接收

zhanghongyin

回复【4楼】正点原子:
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网上的can双节点的例程我这几天试了好多，基本上都是loopback模式好使，但分成两个板子做normal模式就不行了。debug模式运行了一下，发现基本上都没有进入中断，一直在while（1）里面循环，不晓得为什么怎么改都进不去中断啊。
不知道论坛里面的大神们有没有遇到同样问题的，既然能通过轮询模式进行通信我觉得不应该是硬件的问题吧。

IT_danzhululu

请问楼主解决问题了吗 ?

101yang

同样的问题。。。。

101yang

楼主解决了吗？