CAN总线调试的一点心得总结

void USART1_Config(void)

{

        GPIO_InitTypeDef GPIO_InitStructure;

        USART_InitTypeDef USART_InitStructure;

 

        /* config USART1 clock */

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

        

        /* USART1 GPIO config */

   /* Configure USART1 Tx (PA.09) as alternate function push-pull */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOA, &GPIO_InitStructure);    

  /* Configure USART1 Rx (PA.10) as input floating */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

          

        /* USART1 mode config */

        USART_InitStructure.USART_BaudRate = 115200;

        USART_InitStructure.USART_WordLength = USART_WordLength_8b;

        USART_InitStructure.USART_StopBits = USART_StopBits_1;

        USART_InitStructure.USART_Parity = USART_Parity_No ;

        USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

        USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

        USART_Init(USART1, &USART_InitStructure); 

  USART_Cmd(USART1, ENABLE);

        

        /* Enable the EVAL_COM1 Transmit interrupt: this interrupt is generated when the 

     EVAL_COM1 transmit data register is empty */  

  //USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

 

  /* Enable the EVAL_COM1 Receive interrupt: this interrupt is generated when the 

     EVAL_COM1 receive data register is not empty */

  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

}

 

/***************USART1 ÅäÖÃÖжϷ½Ê½·¢ËͽÓÊÕÊý¾Ý******************************/

void USART1_NVIC_Configuration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure;

 

  /* Enable the USARTx Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}

 

/****************USART1 ÖжϺ¯Êý***************************/

void USART1_IRQHandler(void)

{

        if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)

        {

                RxBuffer[RxCounter++] = (USART_ReceiveData(USART1));

        }

}

void USART2_Config(void)

{

        GPIO_InitTypeDef GPIO_InitStructure;

        USART_InitTypeDef USART_InitStructure;

 

        /* config USART2 clock */

        //RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 , ENABLE);

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

        

        /* USART2 GPIO config */

   /* Configure USART2 Tx (PA.02) as alternate function push-pull */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOA, &GPIO_InitStructure);    

  /* Configure USART2 Rx (PA.03) as input floating */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

          

        /* USART2 mode config */

        USART_InitStructure.USART_BaudRate = 115200;

        USART_InitStructure.USART_WordLength = USART_WordLength_8b;

        USART_InitStructure.USART_StopBits = USART_StopBits_1;

        USART_InitStructure.USART_Parity = USART_Parity_No ;

        USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

        USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

        USART_Init(USART2, &USART_InitStructure);

        USART_Cmd(USART2, ENABLE);

        

        /* Enable the EVAL_COM1 Transmit interrupt: this interrupt is generated when the 

     EVAL_COM1 transmit data register is empty */  

  //USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

 

  /* Enable the EVAL_COM1 Receive interrupt: this interrupt is generated when the 

     EVAL_COM1 receive data register is not empty */

  //USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

        USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

}

 

 

/***************USART2 ÅäÖÃÖжϷ½Ê½·¢ËͽÓÊÕÊý¾Ý******************************/

void USART2_NVIC_Configuration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure;

 

  /* Enable the USARTx Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}

 

/****************USART2 ÖжϺ¯Êý***************************/

void USART2_IRQHandler(void)

{

        if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)

        {

                RxBuffer[RxCounter++] = (USART_ReceiveData(USART2));

        }

}

/*CAN GPIO ºÍʱÖÓÅäÖà */

 void CAN_GPIO_Config(void)

{

  GPIO_InitTypeDef GPIO_InitStructure; 

  /* ¸´Óù¦ÄܺÍGPIOB¶Ë¿ÚʱÖÓʹÄÜ*/         

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB, ENABLE);                                                                                                                         

 

  /* CAN1 Ä£¿éʱÖÓʹÄÜ */

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CAN1, ENABLE); 

 

  /* Configure CAN pin: RX */         // PB8

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;         // ÉÏÀ­ÊäÈë

  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; // ¸´ÓÃÍÆÍìÊä³ö

  GPIO_Init(GPIOB, &GPIO_InitStructure);

  

        //#define GPIO_Remap_CAN    GPIO_Remap1_CAN1 ±¾ÊµÑéûÓÐÓõ½ÖØÓ³ÉäI/O

  GPIO_PinRemapConfig(GPIO_Remap1_CAN1, ENABLE);

 

  

}