/**
* 获取查询最新记录的命令
*
* @param token
* @param num
* @return
*/
public static byte[] getLatestRecordCommand(int token, int num) {
// $PCL 0x41 0x00 0x00 0x00 0x04 0x00 R_INDEX
// checksum
// $PCL 0x51 0x00 0x00 0x00 0x04 0x00 R_INDEX
// checksum
// $PCL 0x61 0x00 0x00 0x00 0x04 0x00 R_INDEX
// checksum
if (num <= 0) return null;
byte[] command = {
'$', 'P', 'C', 'L', 0x61, 0x00, 0x00, 0x00, 0x04, 0x00, 0x1, 0x0, 0x0, 0x0, 0x0
};
command[4] = (byte) (token + 1);
command[10] = (byte) ((num) % 10);
command[11] = (byte) ((num) / 10);
command[12] = (byte) ((num) % 10);
command[13] = (byte) ((num) / 10);
command[14] = getCheckSum(MyArrays.copyOfRange(command, 0, command.length - 1));
return command;
}
/**
* 检验时间的校验和
*
* @param data
* @return
*/
public static boolean check(byte[] data) {
byte checkSum = getCheckSum(MyArrays.copyOfRange(data, 0, data.length - 1));
boolean result = checkSum == data[data.length - 1];
Log.i(TAG, "check:" + Arrays.toString(data) + "->" + result);
return result;
}