还是那个老问题，使用CAN通信时，发现在正常模式下无法进入中断函数~~

字幕酱 · 发表于 2015-7-23 16:00:14

[mw_shl_code=c,true]主程序如下，希望各位大神能帮下忙看下哪里出问题了，程序主要用来检测有没有进入中断程序的。进入的话LED就亮。在轮回模式LED亮，有进入中断程序，但正常模式就不行了。PA11，PA12都输出高电平。[/mw_shl_code] [mw_shl_code=c,true]#include "stm32f10x.h" #include "stm32f10x_gpio.h" #include "stm32f10x_can.h" #include "stm32f10x_exti.h" #include "misc.h" #define GPIO_Pin_RX GPIO_Pin_11 #define GPIO_Pin_TX GPIO_Pin_12 void RCC_Configuration(void); void GPIO_Configuration(void); void NVIC_Configuration(void); void Init_TxMes(void); void CAN_Config(void); uint8_t CAN_ReceiveBuff[7]; CanTxMsg TxMessage; CanRxMsg RxMessage; int main(void) { RCC_Configuration(); /* 初始化时钟 */ GPIO_Configuration(); /* 初始化GPIO端口 */ NVIC_Configuration(); /* 中断设置 */ CAN_Config(); /* CAN 设置 */ Init_TxMes(); /* 发送帧数据 */ while(1) { } } /* 各模块时钟初始化 */ void RCC_Configuration(void) { SystemInit(); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); } /* GPIO端口设置，设置Rx和Tx引脚 */ void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOE,&GPIO_InitStructure); } /* 中断设置 */ void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn; /* CAN1的RX0 */ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; /* 使能 */ NVIC_Init(&NVIC_InitStructure); } /* CAN设置 */ void CAN_Config(void) { CAN_InitTypeDef CAN_InitStructure; CAN_FilterInitTypeDef CAN_FilterInitStructure; CAN_DeInit(CAN1); CAN_StructInit(&CAN_InitStructure); 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; /* 轮回模式下能进入中断 */ CAN_InitStructure.CAN_SJW=CAN_SJW_1tq; CAN_InitStructure.CAN_BS1=CAN_BS1_3tq; CAN_InitStructure.CAN_BS2=CAN_BS2_5tq; CAN_InitStructure.CAN_Prescaler=4; CAN_Init(CAN1, &CAN_InitStructure); 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; /* 关联FMP0 */ CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; CAN_FilterInit(&CAN_FilterInitStructure); CAN_ITConfig(CAN1,CAN_IT_FMP0, ENABLE); /* 中断使能 */ } /* 发送帧数据 */ void Init_TxMes(void) { TxMessage.StdId=0x321; TxMessage.ExtId=0x01; TxMessage.RTR=CAN_RTR_DATA; TxMessage.IDE=CAN_ID_STD; TxMessage.DLC=1; TxMessage.Data[0]=0x01; TxMessage.Data[1]=0x02; CAN_Transmit(CAN1,&TxMessage); }

终端程序如下（功能是点亮LED灯，主要来检测有没进入中断程序的） [/mw_shl_code] [mw_shl_code=c,true]void USB_LP_CAN1_RX0_IRQHandler(void) { GPIO_SetBits(GPIOE,GPIO_Pin_5); } [/mw_shl_code]