CPAL 操作 UDS 诊断

做个记录。

首先我们需要进行 UDS 诊断配置。

然后，在 CAPL 中，我们要例化一些已经定义的请求：

  diagRequest BasicDiagnosticsEcu.ReadDimmConfigData DiagReadDimmingFactor;
  diagRequest BasicDiagnosticsEcu.WriteDimmConfigData DiagWriteDimmingFactor;

对于发送诊断读，比如 0x22，我们可以直接发送请求就可以，比如，我们通过一个 env 来触发这个发送：

on envVar envVar_BtnReadDimmingFator
{
  if(getValue(this) == 1) diagSendRequest( DiagReadDimmingFactor);
}

对于发送诊断写，比如 0x2E, 我们需要先设置数据：

  ...
  sendData[0] = (theFactor>>8) & 0xFF;
  sendData[1] = theFactor & 0xFF;
  
  diagResize(DiagWriteDimmingFactor, 8);
  DiagWriteDimmingFactor.SetPrimitiveByte(3, index);
  DiagWriteDimmingFactor.SetPrimitiveByte(4, 0x00);
  DiagWriteDimmingFactor.SetPrimitiveByte(5, 0x00);
  DiagWriteDimmingFactor.SetPrimitiveByte(6, sendData[0]);
  DiagWriteDimmingFactor.SetPrimitiveByte(7, sendData[1]); 
  
  Write("Write dimming Factor: 0x2E 0x41 0x0B 0x%02X 0x00 0x00 0x%02X 0x%02X", index, sendData[0], sendData[1]);
  
  diagSendRequest(DiagWriteDimmingFactor);
  
  diagResize(DiagWriteDimmingFactor, 4);
  DiagWriteDimmingFactor.SetPrimitiveByte(3, 0x0FF); 
  diagSendRequest(DiagWriteDimmingFactor);

对于 Response 的处理，我们可以这样全部收过来之后再处理：

on diagResponse *
{
  int size;
  byte data[128];
  size= this.GetPrimitiveSize();
  this.GetPrimitiveData(data, elcount(data));
  
  if((data[0] == 0x62) && (data[1] == 0x41) && (data[2] == 0x0B))
  { 
    ...
  }
}

另外，记录一个小技巧，不用每次都改那个判断里的 env 变量名称：

on envVar envVar_BtnDimmingFator00
{
  if(getValue(this) == 1) doUpdateDimmingFactor(0);
}