完善资料让更多小伙伴认识你,还能领取20积分哦, 立即完善>
|
` 我现在在调试STM32F103的CAN总线,就是用STM32F103通过CAN发送数据,利用CAN总线分析仪在电脑上看到数据,现在收不到数据。我把我的电路和代码以及波形放上来请广大网友指点一二,谢谢啦~~~~ 下面是主函数,很简单就是初始化之后循环发送数据。 int main(void) { CAN_Config(); LED_GPIO_Config(); CAN_SetMsg(); while(1) { CAN_Transmit(CAN1, &TxMessage); GPIO_WriteBit(GPIOD, GPIO_Pin_2, (BitAction)((1-GPIO_ReadOutputDataBit(GPIOD, GPIO_Pin_2)))); Delay_ms(50); } } 下面是CAN的配置程序: static void CAN_GPIO_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); GPIO_PinRemapConfig(GPIO_Remap1_CAN1, ENABLE); /* Configure CAN pin: RX */ // PB8 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure CAN pin: TX */ // PB9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); } static void CAN_NVIC_Config(void) { NVIC_InitTypeDef NVIC_InitStructure; /* Configure one bit for preemption priority */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } 波特率为36MHz/(2+5+5)/24=125K static void CAN_Mode_Config(void) { CAN_InitTypeDef CAN_InitStructure; CAN_DeInit(CAN1); CAN_StructInit(&CAN_InitStructure); CAN_InitStructure.CAN_TTCM=DISABLE; CAN_InitStructure.CAN_ABOM=ENABLE; CAN_InitStructure.CAN_AWUM=ENABLE; 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_2tq; CAN_InitStructure.CAN_BS1=CAN_BS1_5tq; CAN_InitStructure.CAN_BS2=CAN_BS2_5tq; CAN_InitStructure.CAN_Prescaler =24; CAN_Init(CAN1, &CAN_InitStructure); } static void CAN_Filter_Config(void) { CAN_FilterInitTypeDef CAN_FilterInitStructure; CAN_FilterInitStructure.CAN_FilterNumber=0; CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask; CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit; CAN_FilterInitStructure.CAN_FilterIdHigh= (((u32)0x1314<<3)&0xFFFF0000)>>16; CAN_FilterInitStructure.CAN_FilterIdLow= (((u32)0x1314<<3)|CAN_ID_EXT|CAN_RTR_DATA)&0xFFFF; CAN_FilterInitStructure.CAN_FilterMaskIdHigh= 0xFFFF; CAN_FilterInitStructure.CAN_FilterMaskIdLow= 0xFFFF; CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_Filter_FIFO0 ; CAN_FilterInitStructure.CAN_FilterActivation=ENABLE; CAN_FilterInit(&CAN_FilterInitStructure); CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE); } CAN通信报文的内容设置: void CAN_SetMsg(void) { //TxMessage.StdId=0x00; TxMessage.ExtId=0x1314; TxMessage.IDE=CAN_ID_EXT; TxMessage.RTR=CAN_RTR_DATA; TxMessage.DLC=2; TxMessage.Data[0]=0xAB; TxMessage.Data[1]=0xCD; } `
|
|
相关推荐
2 个讨论
|
|
|
问题找到了,是我没有把CAN总线分析仪的速率配置好,我误把串口波特率当成了CAN的波特率了
|
|
|
|
|
|
3 条评论
|
|
你正在撰写讨论
如果你是对讨论或其他讨论精选点评或询问,请使用“评论”功能。
STM32F405驱动DS1302时钟模块,输出时间错乱该怎么排查?
2797 浏览 2 评论
stm32f405rgt6驱动DS1302ZN出现时间错乱问题
2403 浏览 1 评论
stm32用fsmc读取ad7606采集数据,数据不变,只有开发版复位才更新数据
2276 浏览 0 评论
2388 浏览 1 评论
1637 浏览 1 评论
/9
小黑屋| 手机版| Archiver| 电子发烧友 ( 湘ICP备2023018690号 )
GMT+8, 2025-12-2 00:48 , Processed in 0.913201 second(s), Total 70, Slave 54 queries .
Powered by 电子发烧友网
© 2015 bbs.elecfans.com
关注我们的微信
下载发烧友APP
电子发烧友观察
版权所有 © 湖南华秋数字科技有限公司
电子发烧友 (电路图) 湘公网安备 43011202000918 号 电信与信息服务业务经营许可证:合字B2-20210191

淘帖
26798