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验证码输入错误，请重新输入求助STM32 CAN收发 PA11&12回环OK 正常模式无数据发送==
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求助STM32 CAN收发 PA11&12回环OK 正常模式无数据发送
用户名：e_boys
注册时间： 10:28:00
求助STM32 CAN收发 PA11&12回环OK 正常模式无数据发送
本帖最后由 e_boys 于
10:59 编辑 问题如题，以下是我的源代码：请各位大侠帮帮忙！源代码有两个部分，一个是main.c 一个是stm32f10x_it.c(此文件中我只使用了can接收中断和系统定时中断) （cantx和canrx都是一样的）/******************** (C)
********************* File Name
: main.c* Author
: MCD Application Team*
: V1.0* Date
: 10/08/2007*
body********************************************************************************* THE PRESENT
WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS* WITH CODING INFORMATION REGARDING THEIR
IN ORDER FOR THEM TO SAVE TIME.* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.*******************************************************************************//* Includes ------------------------------------------------------------------*/#include &stm32f10x_lib.h&/* Local includes ------------------------------------------------------------*//* Private typedef -----------------------------------------------------------*/typedef enum {FAILED = 0, PASSED = !FAILED} TestS/* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*/vu32 /* for return of the interrupt
*/volatile TestStatus TestRx;ErrorStatus HSEStartUpSu16 TimingD/* Private functions ---------------------------------------------------------*/void RCC_Configuration(void);void GPIO_Configuration(void);void NVIC_Configuration(void);TestStatus CAN_Polling(void);TestStatus CAN_Interrupt(void);void SysTick_Configuration(void);void delay_ms(u16 temp){TimingDelay =while(TimingDelay != 0);}/******************************************************************************** Function Name: SysTick_Configuration* Description
: 系统时钟设置* Input
: None* Return
: None*******************************************************************************/void SysTick_Configuration(void){
RCC_ClocksTypeDef
RCC_ClocksS
/* Return SysTick data */
RCC_GetClocksFreq(&RCC_ClocksStatus);
/* SysTick event each 1 ms with input clock equal to 9MHz (HCLK/8)*/
SysTick_SetReload(RCC_ClocksStatus.HCLK_Frequency/8/1000);
/* Enable the SysTick Interrupt */
SysTick_ITConfig(ENABLE);
/* Enable the SysTick Counter */
SysTick_CounterCmd(SysTick_Counter_Enable);}/******************************************************************************** Function Name: main* Description
: Main program* Input
: None* Output
: None* Return
: None*******************************************************************************/int main(void){ CanTxMsg TxM u32 i = 0; u8 temp_#ifdef DEBUGdebug();#endif/*
Clocks Configuration */RCC_Configuration();/* NVIC Configuration */NVIC_Configuration();/* GPIO ports pins Configuration */GPIO_Configuration();/* System Clocks */SysTick_Configuration();/* CAN transmit at 100Kb/s and receive by polling in loopback mode*/TestRx = CAN_Polling();while (1){
/* transmit 1 message */
TxMessage.StdId=0x12;
TxMessage.ExtId=0x34;
TxMessage.IDE=CAN_ID_EXT;
TxMessage.RTR=CAN_RTR_DATA;
TxMessage.DLC=2;
TxMessage.Data[0]=0xDE;
TxMessage.Data[1]=0xCA;
temp_data = CAN_Transmit(&TxMessage);
temp_data = CAN_TransmitStatus(temp_data);
while(( temp_data != CANTXOK) && (i != 0xFF))
temp_data = CAN_TransmitStatus(temp_data);
GPIOA->ODR |= 0x0100;
//蜂鸣器响:
if(temp_data == CANTXOK) delay_ms(600); //以不同声音区分发送状态；
else delay_ms(100);
GPIOA->ODR &= (~0x0100); //蜂鸣器关:
delay_ms(900); }}/******************************************************************************** Function Name: RCC_Configuration* Description
: Configures the different system clocks.* Input
: None* Output
: None* Return
: None*******************************************************************************/void RCC_Configuration(void){/* RCC system reset(for debug purpose) */RCC_DeInit();/* Enable HSE */RCC_HSEConfig(RCC_HSE_ON);/* Wait till HSE is ready */HSEStartUpStatus = RCC_WaitForHSEStartUp();if(HSEStartUpStatus == SUCCESS){
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
HSE as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE);
/* Wait till HSE is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x04)
}}/* GPIOA , GPIOB ,GPIOC , GPIOD and AFIO clock enable */RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOD, ENABLE);/* CAN Periph clock enable */RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN, ENABLE);}/******************************************************************************** Function Name: GPIO_Configuration* Description
: Configures the different GPIO ports.* Input
: None* Output
: None* Return
: None*******************************************************************************/void GPIO_Configuration(void){GPIO_InitTypeDef GPIO_InitS//GPIO_PinRemapConfig(GPIO_Remap1_CAN, ENABLE);/* Configure PA.08 Output push-pull */ //蜂鸣器;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &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);}/******************************************************************************** Function Name: NVIC_Configuration* Description
: Configures the NVIC and Vector Table base address.* Input
: None* Output
: None* Return
: None*******************************************************************************/void NVIC_Configuration(void){NVIC_InitTypeDef NVIC_InitS#ifdefVECT_TAB_RAM/* Set the Vector Table base location at 0x */ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); #else/* VECT_TAB_FLASH*//* Set the Vector Table base location at 0x */ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); #endif/* enabling interrupt */NVIC_InitStructure.NVIC_IRQChannel=USB_LP_CAN_RX0_IRQCNVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);}/******************************************************************************** Function Name: CAN_Polling* Description
: Configures the CAN and transmit and receive by polling* Input
: None* Output
: None* Return
: PASSED if the reception is well done, FAILED in other case*******************************************************************************/TestStatus CAN_Polling(void){u8 ECAN_InitTypeDef
CAN_InitSCAN_FilterInitTypeDefCAN_FilterInitS/* CAN register init */CAN_DeInit();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_N//CAN_Mode_LoopBCAN_InitStructure.CAN_SJW=CAN_SJW_1CAN_InitStructure.CAN_BS1=CAN_BS1_8CAN_InitStructure.CAN_BS2=CAN_BS2_7CAN_InitStructure.CAN_Prescaler=5;Error =CAN_Init(&CAN_InitStructure);if (Error == 0)
return FAILED;/* CAN filter init */CAN_FilterInitStructure.CAN_FilterNumber=0;CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMCAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32CAN_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_ITConfig(CAN_IT_TME, ENABLE);return PASSED; /* Test Passed */}/******************************************************************************** Function Name: assert_failed* Description
: Reports the name of the source file and the source line number*
where the assert_param error has occurred.* Input
: - file: pointer to the source file name*
- line: assert_param error line source number* Output
: None* Return
: None*******************************************************************************/void assert_failed(u8* file, u32 line){ /* User can add his own implementation to report the file name and line number, ex: printf(&Wrong parameters value: file %s on line %d\r\n&, file, line) *//* Infinite loop */while (1){}}/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****///文件2：stm32f10x_it.c/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************* File Name
: stm32f10x_it.c* Author
: MCD Application Team* Version
: V1.0* Date
: 10/08/2007
* Description
: Main Interrupt Service Routines.*
This file can be used to describe all the exceptions *
subroutines that may occur within user application.*
When an interrupt happens, the software will branch *
automatically to the corresponding routine.*
The following routines are all empty, user can write code *
for exceptions handlers and peripherals IRQ interrupts.********************************************************************************* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.*******************************************************************************//* Includes ------------------------------------------------------------------*/#include &stm32f10x_it.h&/* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*/extern vu32extern u16 TimingD/* Private function prototypes -----------------------------------------------*//* Private functions ---------------------------------------------------------*//******************************************************************************** Function Name: SysTickHandler* Description
: This function
SysTick Handler.* Input
: None* Output
: None* Return
: None*******************************************************************************/void SysTickHandler(void){
if(TimingDelay > 0) TimingDelay--;}/******************************************************************************** Function Name: USB_HP_CAN_TX_IRQHandler* Description
: This function handles USB High Priority or CAN TX interrupts *
requests.* Input
: None* Output
: None* Return
: None*******************************************************************************/void USB_HP_CAN_TX_IRQHandler(void){
CAN_ITConfig(CAN_IT_TME, DISABLE);}/******************************************************************************** Function Name: USB_LP_CAN_RX0_IRQHandler* Description
: This function handles USB Low Priority or CAN RX0 interrupts *
requests.* Input
: None* Output
: None* Return
: None*******************************************************************************/void USB_LP_CAN_RX0_IRQHandler(void){vu8 temp_flag=0;
//用于在线调试的时候看数据所用CanRxMsg RxMRxMessage.StdId=0x00;RxMessage.ExtId=0x00;RxMessage.IDE=0;RxMessage.DLC=0;RxMessage.FMI=0;RxMessage.Data[0]=0x00;RxMessage.Data[1]=0x00;CAN_Receive(CAN_FIFO0, &RxMessage);if((RxMessage.StdId==0x12) && (RxMessage.ExtId==0x34) && (RxMessage.IDE==CAN_ID_EXT) && (RxMessage.DLC==2) && ((RxMessage.Data[1]|RxMessage.Data[0]<<8)==0xDECA)){
temp_flag = 1; }else{
temp_flag = 0; }temp_flag = 0;}/******************************************************************************** Function Name: CAN_RX1_IRQHandler* Description
: This function handles CAN RX1 interrupt request.* Input
: None* Output
: None* Return
: None*******************************************************************************/void CAN_RX1_IRQHandler(void){}/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
用户名：e_boys
注册时间： 15:09:00
香版主可否帮忙看看啊？ 谢谢了！
用户名：McuPlayer
注册时间： 15:22:00
香斑也挺郁闷的，咋天天看别人的source code呢
用户名：e_boys
注册时间： 16:55:00
哈哈！我也不想，但是我坚持独自一个人搞了一周了还不见进展故来网上请教高手！就等不见高人回帖自得请版主了！ 3# McuPlayer
用户名：e_boys
注册时间： 16:56:00
哈哈！我也不想，但是我坚持独自一个人搞了一周了还不见进展故来网上请教高手！久等不见高人回帖只得请版主了！
用户名：IJK
注册时间： 17:14:00
1.CAN正常通信模式，需要至少2个节点
2.用示波器看看CAN_RX引脚的电平，正常应该是高电平
用户名：e_boys
注册时间： 17:38:00
我现在检测出一些现象，我改为正常模式后上电一开始检测到了一组波形从CANTX输出，之后就不在出现波形（使用回环模式结果是不停发送的，因为我的程序就是让他不停发送的）
第二个现象是，我使用回环模式下CANTX不停发送信号，我一路跟踪信号到MCP2551-I / SN的第一脚TXD波形仍然是正常，但是我此时用示波器量到MCP2551-I / SN输出引脚CANH和CANL的时候却没有了变化。这里有点晕呀！ 6# IJK
用户名：e_boys
注册时间： 17:42:00
IJK，谢谢您的回复
我有点疑惑，
1、2个节点是要3个设备吧？
2、如果我现在只有两台一样的设备（都可收发，我使用一台收，一台发）可以发数据吗？
3、正常模式下用示波器测CAN_RX引脚的电平是3.4V左右正常吗？
用户名：IJK
注册时间： 9:00:00
1、2个节点 2个设备就行了
2、如果只有两台一样的设备（都可收发，我使用一台收，一台发），可以发数据
3、正常模式下用示波器测CAN_RX引脚的电平是3.4V左右，基本正常
另外，看CAN初始化(CAN_Polling)是否成功，还要看CAN的状态寄存器。
用户名：e_boys
注册时间： 9:29:00
CAN初始化成功，返回PASSED标志，还有就是发生后我检测发送状态寄存器返回值为CANTXPENDING 标志 9# IJK
用户名：e_boys
注册时间： 9:39:00
我修改了波特率和那个发送数据个数后发现
如果更改发送数据个数为8个
/* transmit 1 message */
& && && & TxMessage.StdId=0x12;
& && && & TxMessage.ExtId=0x34;
& && && & TxMessage.IDE=CAN_ID_EXT;
& && && & TxMessage.RTR=CAN_RTR_DATA;
& && && & TxMessage.DLC=8;
& && && & for(i=0;i&8;i++)
& && && &{
& && && && & TxMessage.Data[i]=i;
& && && &}
或者更改波特率设置为如下 CAN_InitStructure.CAN_SJW=CAN_SJW_1
&&CAN_InitStructure.CAN_BS1=CAN_BS1_9
&&CAN_InitStructure.CAN_BS2=CAN_BS2_8
&&CAN_InitStructure.CAN_Prescaler=200;
以上两种更改都会导致在回环模式下都无法发送正常。
用户名：e_boys
注册时间： 16:09:00
哈哈！总算搞定了。我这只瞎猫总算碰上了死耗子！东猜西猜总算找到了问题，发送不成功是我一只稳压管有问题把它拉到地了。发送搞定了有出现接收到的ID出现全0的现象（不过那个程序不是这个，是我改过的精简版本），后来又改成这个OK了（是发送参数变量ID中途被清零了）。
用户名：e_boys
注册时间： 16:10:00
谢谢各位的帮忙！谢谢了！
用户名：贝多芬爵士
注册时间： 18:48:00
如果是一些方波正常不呢？
用户名：phctgu
注册时间： 14:28:00
CAN&&简单的很
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