备注：COM-API常用用法整理，持续更新

一、用户I-PDU发送回调中，指定发送对应DBC的信号值

boolean Rte_COMIPduCallout_signal(PduIdType id, PduInfoType *ptr)
{
	static uint8 ucCheckSum = 0;

	// Calculate checksum
	if (ucCheckSum >= 15)
		ucCheckSum = 0;
	else
		ucCheckSum++;

	// Send checksum to the signal
	Com_SendSignal(ComSignal_signal, (void *)&(ucCheckSum));

	return TRUE;
}

二、获取DBC上指定信号的值，用于条件判断或其他处理

例如：ECU复位前的条件判断，如果车速大于5，则不允许复位。

Std_ReturnType DcmAppl_DcmEcuResetPreparation(
    uint8 ResetType,
    Dcm_NegativeResponseCodeType * ErrorCode
)
{
    uint8 ucSpeed = 0;
    Std_ReturnType retVal = E_OK;
	*ErrorCode = 0x00;
    (void)(ResetType);

    // Get speed signal
    Com_ReceiveSignal(ComSignal_Speed, &ucSpeed);

    // speed check
    if(ucSpeed >= 5 )
    {
        retVal = E_NOT_OK;
        *ErrorCode = 0x7E;
    }

    return retVal;
}