如何在CANalyzer 8.5 SP7中获取报文的接收方属性？

在CANalyzer 8.5 SP7中，报文对象this并没有直接提供receiver或receivers属性，但可以通过CAPL的数据库访问函数获取CANdb中定义的报文接收节点列表，以下是两种可行的实现方式：

方法一：通用报文监听（匹配所有报文） #

通过dbGetMessage获取当前报文的句柄，再用dbGetMessageReceivers提取接收节点列表，遍历判断是否包含目标节点：

on message *
{
  char receiverList[100];
  long msgHandle = dbGetMessage(this.id);
  if(msgHandle != 0)
  {
    // 获取以逗号分隔的接收节点字符串，返回值为节点数量
    int receiverCount = dbGetMessageReceivers(msgHandle, receiverList, sizeof(receiverList));
    char* currentReceiver = strtok(receiverList, ",");
    
    while(currentReceiver != NULL)
    {
      if(strcmp(currentReceiver, "BCM") == 0)
      {
        write("The message %x will be received by the BCM", this.ID);
        break;
      }
      currentReceiver = strtok(NULL, ",");
    }
  }
}

方法二：指定报文监听（已知报文名称） #

如果已经明确要监听的报文（比如"BODY1"），可以直接通过名称获取报文句柄：

on message BODY1
{
  char receiverList[100];
  long msgHandle = dbGetMessageByName("BODY1");
  if(msgHandle != 0)
  {
    int receiverCount = dbGetMessageReceivers(msgHandle, receiverList, sizeof(receiverList));
    char* currentReceiver = strtok(receiverList, ",");
    
    while(currentReceiver != NULL)
    {
      if(strcmp(currentReceiver, "BCM") == 0)
      {
        write("The message BODY1 will be received by the BCM");
        break;
      }
      currentReceiver = strtok(NULL, ",");
    }
  }
}

注意事项 #

• 确保CANdb数据库已正确加载到CANalyzer工程中，否则dbGetMessage等函数会返回0；
• dbGetMessageReceivers返回的接收节点以逗号分隔，需通过strtok函数分割后逐个校验。

内容的提问来源于stack exchange，提问作者Sombra do Baiano