CAN发送不知道哪里有错误。一直是2.5V未该改变

只看该作者 · 2015-11-9 18:09

#include "pbdata.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void CAN_Configuration(void);

int main(void)
{
CanTxMsg TxMessage;

RCC_Configuration(); //ÏµÍ³Ê±ÖÓ³õÊ¼»¯
GPIO_Configuration();//¶Ë¿Ú³õÊ¼»¯
NVIC_Configuration();
CAN_Configuration();

while(1)
{
TxMessage.StdId=0x02>>5;
TxMessage.ExtId=0;

TxMessage.IDE=CAN_ID_STD;
//Êý¾ÝÖ¡
TxMessage.RTR=CAN_RTR_DATA;
TxMessage.DLC=8;

for(b=0;b<8;b++)
{
TxMessage.Data[b]=rx[b];
}
CAN_Transmit(CAN1,&TxMessage);
delay_ms(10);
}
}

void RCC_Configuration(void)
{
SystemInit();//72m
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1,ENABLE);
}

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//LED

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_11;//RX
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;
GPIO_Init(GPIOA,&GPIO_InitStructure);

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

}

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

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

void CAN_Configuration(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;
//FIFO Òç³öÊ±±¨ÎÄ¸²¸ÇÔ´ÎÄ¼þ
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_3tq;
CAN_InitStructure.CAN_BS2=CAN_BS2_2tq;
CAN_InitStructure.CAN_Prescaler = 48;

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=0;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh=0x0000;
CAN_FilterInitStructure.CAN_FilterMaskIdLow=0;
CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0;
CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
CAN_FilterInit(&CAN_FilterInitStructure);
CAN_ITConfig(CAN1,CAN_IT_FMP0,ENABLE);
}

只看该作者 · 2015-11-10 08:25

用示波器测量下PA12是不是有输出，还有把你的原理图发上来看看是不是原理图有问题

只看该作者 · 2015-11-10 19:03

457344370 发表于 2015-11-10 08:25
用示波器测量下PA12是不是有输出，还有把你的原理图发上来看看是不是原理图有问题 ...

好像能跑了。不过遇到新的问题了
我想要细谈。就是CAN发送延时不管用。
QQ：864095840
邮箱：864095840@qq.com

CAN发送不知道哪里有错误。一直是2.5V未该改变

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