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请教:can正常模式检测不到信号

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bitjiamin|  楼主 | 2012-7-23 15:01 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
本帖最后由 bitjiamin 于 2012-7-23 15:04 编辑

RT,用的芯片是stm32f103c8t6,与PCI9820I通讯。
求大神赐教啊,下面是我的代码:
#include "stm32f10x.h"
#include "misc.h"
#include "stm32f10x_can.h"
#include "platform_config.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
TestStatus CAN_Polling(void);
TestStatus CAN_Interrupt(void);
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
  /* NVIC Configuration */
  NVIC_Configuration();
  
  /* GPIO ports pins Configuration */
  GPIO_Configuration();
  
  GPIO_ResetBits(GPIOA, GPIO_Pin_1);

  
  /* CAN transmit at 100Kb/s and receive by polling in loopback mode */
  TestRx = CAN_Polling();
  if (TestRx == FAILED)
  {
   
     GPIO_ResetBits(GPIOA, GPIO_Pin_1);
  }
  else
  {
      //轮询方式收发正常
    GPIO_SetBits(GPIOA, GPIO_Pin_1);
  }
  /* CAN transmit at 500Kb/s and receive by interrupt in loopback mode */
  TestRx = CAN_Interrupt();
  if (TestRx == FAILED)
  {
   
  }
  else
  {
    //中断方式收发正常
  }
  
  while (1)
  {
  }
}
void RCC_Configuration(void)
{
  /* Setup the microcontroller system. Initialize the Embedded Flash Interface,  
     initialize the PLL and update the SystemFrequency variable. */
  /* The System frequency should be set to HSE frequency */
  SystemInit();
  
  /* GPIO for CAN and GPIO for LEDs clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO |RCC_APB2Periph_GPIO_CAN | RCC_APB2Periph_GPIOA, ENABLE);
  /* CAN1 Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE);
}
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  /* Configure GPIO_LED pin6, pin7, pin8 and pin9 as Output push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  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_RX;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(GPIO_CAN, &GPIO_InitStructure);
  
  /* Configure CAN pin: TX */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_TX;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIO_CAN, &GPIO_InitStructure);
  
  GPIO_PinRemapConfig(GPIO_Remap_CAN , ENABLE);
}
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  /* Enable CAN1 RX0 interrupt IRQ channel */
  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);
}
TestStatus CAN_Polling(void)
{
  CAN_InitTypeDef        CAN_InitStructure;
  CAN_FilterInitTypeDef  CAN_FilterInitStructure;
  CanTxMsg TxMessage;
  CanRxMsg RxMessage;
  uint32_t i = 0;
  uint8_t TransmitMailbox = 0;
  /* CAN register init */
  CAN_DeInit(CAN1);
  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_Normal;
  CAN_InitStructure.CAN_SJW=CAN_SJW_1tq;
  CAN_InitStructure.CAN_BS1=CAN_BS1_8tq;
  CAN_InitStructure.CAN_BS2=CAN_BS2_7tq;
  CAN_InitStructure.CAN_Prescaler=9;
  CAN_Init(CAN1, &CAN_InitStructure);
  /* CAN filter init */
  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;
  CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);
  /* transmit */
  TxMessage.StdId=0x11;
  TxMessage.RTR=CAN_RTR_DATA;
  TxMessage.IDE=CAN_ID_STD;
  TxMessage.DLC=2;
  TxMessage.Data[0]=0xCA;
  TxMessage.Data[1]=0xFE;
  TransmitMailbox=CAN_Transmit(CAN1, &TxMessage);
  i = 0;
  while((CAN_TransmitStatus(CAN1, TransmitMailbox) != CANTXOK) && (i != 0xFF))
  {
    i++;
  }
  i = 0;
  while((CAN_MessagePending(CAN1, CAN_FIFO0) < 1) && (i != 0xFF))
  {
    i++;
  }
  /* receive */
  RxMessage.StdId=0x00;
  RxMessage.IDE=CAN_ID_STD;
  RxMessage.DLC=0;
  RxMessage.Data[0]=0x00;
  RxMessage.Data[1]=0x00;
  CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);
  if (RxMessage.StdId!=0x11)
  {
    return FAILED;  
  }
  if (RxMessage.IDE!=CAN_ID_STD)
  {
    return FAILED;
  }
  if (RxMessage.DLC!=2)
  {
    return FAILED;  
  }
  if ((RxMessage.Data[0]<<8|RxMessage.Data[1])!=0xCAFE)
  {
    return FAILED;
  }
  
  return PASSED; /* Test Passed */
}
TestStatus CAN_Interrupt(void)
{
  CAN_InitTypeDef        CAN_InitStructure;
  CAN_FilterInitTypeDef  CAN_FilterInitStructure;
  CanTxMsg TxMessage;
  uint32_t i = 0;
  /* CAN register init */
  CAN_DeInit(CAN1);
  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_Normal;
  CAN_InitStructure.CAN_SJW=CAN_SJW_1tq;
  CAN_InitStructure.CAN_BS1=CAN_BS1_8tq;
  CAN_InitStructure.CAN_BS2=CAN_BS2_7tq;
  CAN_InitStructure.CAN_Prescaler=1;
  CAN_Init(CAN1, &CAN_InitStructure);
  /* CAN filter init */
  CAN_FilterInitStructure.CAN_FilterNumber=1;
  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=CAN_FIFO0;
  CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);
  /* CAN FIFO0 message pending interrupt enable */
  CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
  /* transmit 1 message */
  TxMessage.StdId=0x00;
  TxMessage.ExtId=0x1234;
  TxMessage.IDE=CAN_ID_EXT;
  TxMessage.RTR=CAN_RTR_DATA;
  TxMessage.DLC=2;
  TxMessage.Data[0]=0xDE;
  TxMessage.Data[1]=0xCA;
  CAN_Transmit(CAN1, &TxMessage);
  /* initialize the value that will be returned */
  ret = 0xFF;
      
  /* receive message with interrupt handling */
  i=0;
  while((ret == 0xFF) && (i < 0xFFF))
  {
    i++;
  }
  
  if (i == 0xFFF)
  {
    ret=0;  
  }
  /* disable interrupt handling */
  CAN_ITConfig(CAN1, CAN_IT_FMP0, DISABLE);
  return (TestStatus)ret;
}
#ifdef  USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t 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)
  {
  }
}
#endif

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沙发
damiaa| | 2012-7-24 15:06 | 只看该作者
http://bbs.**/thread-327438-1-1.html 你看看这个例子

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板凳
bitjiamin|  楼主 | 2012-7-24 17:30 | 只看该作者
好,谢谢
2# damiaa

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地板
damiaa| | 2012-7-25 17:21 | 只看该作者
这是我跑STM32F103C8T6通过的。改改速率就能用

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5
zhurima| | 2014-7-9 16:19 | 只看该作者
学习

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