void compass_update()
{
	char *data = malloc(20);

	if (!serialRead(*compass->hSerial, data, 19))
		return;

	log_write(0, "Heading: %d (%s)\r\n", heading, data);

	free(data);
}

int serialRead(HANDLE hSerial, char *buff, DWORD bytes)
{
	DWORD dwBytesRead = 0;

	if (!ReadFile(hSerial, buff, bytes, &dwBytesRead, NULL))
		return 0;

	return dwBytesRead;
}