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Open topic with navigation CAPL Functions » J1939 » GB/T 27930 IL » GBT27930IL_OnTxPrepare

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GBT27930IL_OnTxPrepare (Callback)

Valid for: CANoe DE • CANoe4SW DE

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Function Syntax

long GBT27930IL_OnTxPrepare( pg * txPG )

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Description

This callback function is called from the GBT27930 IL before a parameter group is sent. The signal value can be updated in the callback or sending of the message can be suppressed.

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Parameters

  • txPG: message which should be sent

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Return Values

  • 1: send message
  • 0: do not send message

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Example

//Block the CRM message (PGN = 0x0100) if the first byte is 0x00
//Modify the BCL message (PGN = 0x1000):
//  switch the charging mode from "constant current" to "constant voltage"
long GBT27930IL_OnTxPrepare( pg * txPG )
{
  int retValue = 1;
  switch( txPG.PGN )
  {
    case 0x0100:
      if(txPG.byte(0) == 0x9)
        retValue = 0;
      break;
    case 0x1000:
      if(txPG.byte(4) == 0x2)
        txPG.byte(4) = 0x1;
      break;
  }
  return retValue;
}