标题: STM32之CAN---发送管理分析（4） [打印本页]

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作者: yuyang911220    时间: 2014-12-22 17:29     标题: STM32之CAN---发送管理分析（4）

7 与CAN发送有关的固件发送接口发送接口如下：
[cpp] view plaincopy

• /**
•   * @brief  Initiates and transmits a CAN frame message.
•   * @param  CANx: where x can be 1 or 2 to to select the CAN peripheral.
•   * @param  TxMessage: pointer to a structure which contains CAN Id, CAN DLC and CAN data.
•   * @retval The number of the mailbox that is used for transmission or
•   *         CAN_TxStatus_NoMailBox if there is no empty mailbox.
•   */
  
• uint8_t CAN_Transmit(CAN_TypeDef* CANx, CanTxMsg* TxMessage);  

获取发送状态接口如下：[cpp] view plaincopy

• /**
•   * @brief  Checks the transmission status of a CAN Frame.
•   * @param  CANx: where x can be 1 or 2 to select the CAN peripheral.
•   * @param  TransmitMailbox: the number of the mailbox that is used for transmission.
•   * @retval CAN_TxStatus_Ok if the CAN driver transmits the message,  
•   *         CAN_TxStatus_Failed in an other case.
•   */
  
• uint8_t CAN_TransmitStatus(CAN_TypeDef* CANx, uint8_t TransmitMailbox);  

8 一个示例[cpp] view plaincopy

• CanTxMsg TxMessage;  
• int i;  
• 
  
• if(id_fmt == STD_ID)//如果是标准CAN ID
  
• {   
•     TxMessage.StdId = send_frame->id;  //设置标准CAN ID
  
•     TxMessage.IDE = CAN_ID_STD;   //设置IDE为标准CAN ID
  
• }  
• else
  
• {      
•     TxMessage.StdId = (send_frame->  
•     id >>18) & 0x7FF; //设置扩展CAN ID的标准基本ID部分   
  
•     TxMessage.ExtId = send_frame->id & 0x3FFFF;     //设置扩展CAN ID的扩展ID部分
  
•     TxMessage.IDE = CAN_ID_EXT;   //设置IDE为扩展CAN ID
  
• }  
• 
  
• TxMessage.RTR = CAN_RTR_DATA; //数据帧
  
• TxMessage.DLC = 8;  //数据长度
  
• for(i=0;i<8;i++)<br>  
• {  
•     TxMessage.Data = send_frame->data_buff;  
• }  
• 
  
• CAN_Transmit(CAN1,&TxMessage);  
  

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作者: 蓝小墨云    时间: 2014-12-22 19:10

哎哟 这个貌似看起来还可以哦。。你们看看

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