Skip to main content
Open topic with navigation CAPL Functions » K-Line » _Diag_PreSend

​
_Diag_PreSend

Valid for: CANoe DE

​
Function Syntax

_Diag_Presend(BYTE data[], WORD& dataLenInOut, WORD headerLen)

​
Description

Is called before a frame is transmitted. Allows manipulating the frame.

​
Parameters

  • data: Transmitted data buffer of the frame.
  • dataLenInOut: Indicates the length of the frame when _Diag_PreSend is called. Determines the length of the frame before the frame is transmitted.
  • headerLen: Length of the header of a frame. Not supported yet.

​
Return Values

—

​
Example

_Diag_Presend(BYTE data[], WORD& dataLenInOut, WORD headerLen)
{
    if (!gDoPatchInPreSend) // Global variable
    {
        return;
    }

    gDoPatchInPreSend = 0; // deactivate patching

    // Changing the data and the length of the request
    data[2] = 0x99;
    data[3] = 0x99;
    dataLenInOut = 4;
}