// Open a handle to the PassThru device and connect to CAN on pins 6 & 14
errcode = PassThruOpen(NULL, &DeviceID);
errcode = PassThruConnect(DeviceID, CAN, 0, 500000, &ChannelID);

// Add a "pass all" filter because J2534-1 blocks everything by default
Mask.ProtocolID = CAN;
Mask.TxFlags = 0;
Mask.Data[0] = 0x0;
Mask.Data[1] = 0x0;
Mask.Data[2] = 0x0;
Mask.Data[3] = 0x0;
Mask.DataSize = 4;
Pattern.ProtocolID = CAN;
Pattern.TxFlags = 0;
Pattern.Data[0] = 0x0;
Pattern.Data[1] = 0x0;
Pattern.Data[2] = 0x0;
Pattern.Data[3] = 0x0;
Pattern.DataSize = 4;
errcode = PassThruStartMsgFilter(ChannelID, PASS_FILTER, &Mask, &Pattern, NULL, &filterID);

while (1)
{
	// Try to read 100 messages
	numMsgs = 100;
	errcode = PassThruReadMsgs(ChannelID, Msg, &numMsgs, 10);
	if (errcode == ERR_BUFFER_OVERFLOW)
	{
		// Getting here means you've dropped a packet. If so,
		// try to read more messages at once
	}

	// Log to disk instead of writing to the Windows GUI if speed is critical
	dbug_printmsg(Msg, "pMsg", numMsgs, 0);
}