CAN通信

2022-12-15 10:12

APM32F103TBU6的CAN设置，一直没有反应，不知道怎么回事。有用过的能否帮个忙

2022-12-15 10:15

RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_CAN1);
NVIC_EnableIRQRequest(USBD1_LP_CAN1_RX0_IRQn, 0, 0);
void CAN_GPIO_Init(void)
{
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_AFIO);
RCM_EnableAPB2PeriphClock(RCM_APB2_PERIPH_GPIOA);
GPIO_Config_T configStruct;

GPIO_ConfigPinRemap(GPIO_REMAP2_CAN1);
configStruct.pin = GPIO_PIN_12;
configStruct.mode  = GPIO_MODE_AF_PP;
configStruct.speed = GPIO_SPEED_50MHz;
GPIO_Config(GPIOA, &configStruct);

configStruct.pin = GPIO_PIN_11;
configStruct.mode = GPIO_MODE_IN_PU;
GPIO_Config(GPIOA, &configStruct);

}
void CAN_Config_Init(void)
{
RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_CAN1); //使能CAN时钟

CAN_Config_T    canConfig;
CAN_FilterConfig_T FilterStruct;

CAN_Reset(CAN1);

CAN_ConfigStructInit(&canConfig);
canConfig.autoBusOffManage = DISABLE;
canConfig.autoWakeUpMode = DISABLE;
canConfig.nonAutoRetran = DISABLE;
canConfig.rxFIFOLockMode = DISABLE;
canConfig.txFIFOPriority = ENABLE;
canConfig.mode          = CAN_MODE_NORMAL;
canConfig.syncJumpWidth = CAN_SJW_1;
canConfig.timeSegment1    = CAN_TIME_SEGMENT1_3;
canConfig.timeSegment2    = CAN_TIME_SEGMENT2_2; // 100K
canConfig.prescaler = 60;

CAN_Config(CAN1,&canConfig);

FilterStruct.filterNumber = 1;
FilterStruct.filterMode = CAN_FILTER_MODE_IDMASK;
FilterStruct.filterScale = CAN_FILTER_SCALE_32BIT;
FilterStruct.filterIdHigh = 0x6420;
FilterStruct.filterIdLow  = 0x0000;
FilterStruct.filterMaskIdHigh = 0x0000;
FilterStruct.filterMaskIdLow  = 0x0000;
FilterStruct.filterFIFO = CAN_FILTER_FIFO_0;
FilterStruct.filterActivation =  ENABLE;

CAN_ConfigFilter(CAN1,&FilterStruct);
}
void CAN_Transmit_Init(void)
{
// TxMessage.stdID = 0x321;
   TxMessage.stdID = 0x00;
TxMessage.extID = 0x01;
TxMessage.remoteTxReq = CAN_RTXR_DATA;
TxMessage.typeID = CAN_TYPEID_STD;
TxMessage.dataLengthCode = 1;
}
CAN_EnableInterrupt(CAN1,CAN_INT_F0MP);
while(1)
{

         TxMessage.data[0]  = 0x55;
         CAN_TxMessage(CAN1,&TxMessage);



}

2022-12-15 23:34

你好，可以具体描述一下实验环境是怎么样的吗？

2022-12-16 08:50

luobeihai 发表于 2022-12-15 23:34
你好，可以具体描述一下实验环境是怎么样的吗？

单片机是APM32F103TBU6，主要是想利用CAN发送数据，只发送一个标准数据帧，0x55,,速率是250K,用CAN分析仪侦测速率正常，接受中断里面的控制程序没有问题，但是发CAN分析仪上位机软件一直收不到发送的0X55这个数据。

**@luobeihai** · 2022-12-16 08:52

lumilu 发表于 2022-12-16 08:50
单片机是APM32F103TBU6，主要是想利用CAN发送数据，只发送一个标准数据帧，0x55,,速率是250K,用CAN分析仪 ...

接收中断执行没问题
void CAN1_RX0_ISR(void)
{
CAN_RxMessage(CAN1, CAN_RX_FIFO_0, &RxMessage);
if (RxMessage.data[0] == 0x55)
{

GPIO_SetBit(GPIOA,GPIO_PIN_8);
GPIO_ResetBit(GPIOA,GPIO_PIN_9);
}
else
{

GPIO_SetBit(GPIOA,GPIO_PIN_8);
GPIO_SetBit(GPIOA,GPIO_PIN_9);
}
}

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