HarmonyOS 鸿蒙Next 蓝牙数据发送解析 CRC

private fun setDeviceOpen(open: Boolean): ByteArray {
val dataOpenModel = ByteArray(8)
dataOpenModel[0] =0xAA.toByte()
dataOpenModel[1] = (0 shl 6 or (0x0108 shr 8)).toByte()
dataOpenModel[2] = 0x0108.toByte()
dataOpenModel[3] = 0x00
dataOpenModel[4] = 0x00
dataOpenModel[5] = 0x01
dataOpenModel[6] = if (open) 0x01.toByte() else 0x00.toByte()
dataOpenModel[7] = verifyCrc(dataOpenModel, dataOpenModel.size).code.toByte() //crc 校验
return dataOpenModel
} 

/**
 * CRC 16 校验
 *
 * @param buf
 * @param len
 * @return
 */
private fun verifyCrc(buf: ByteArray, len: Int): Char {
  var sum = 0.toChar()
  var i: Int
  i = 0
  while (i < len) {
    sum = (sum.code xor buf[i].toInt()).toChar()
    i++
  }
  return sum
}