CameraMachine/python/mcu/BaseClass.py

import asyncio
from sockets import ConnectionManager
from utils.common import message_queue

class BaseClass:

    def __init__(self, websocket_manager: ConnectionManager):
        self.websocket_manager = websocket_manager
        self.msg_type = ""

    def sendSocketMessage(self, code=0, msg="", data=None):
        data = {"code": code, "msg": msg, "data": data, "msg_type": self.msg_type}
        loop = asyncio.get_event_loop()
        loop.create_task(message_queue.put(data))
    def change_hex_to_int(self,_bytearray):
        return ' '.join([hex(x) for x in _bytearray])

    def read_cmd(self, serial_handle, check=None):
        n = 0
        while 1:
            try:
                read_d = serial_handle.read_all()  # 读取接收到的数据
                self.receive_data += read_d
            except BaseException as e:
                print("171串口接收报错", e)
                self.serial_handle = None
                return False

            if len(self.receive_data) < 4:
                break

            if self.receive_data[0] == 0x55 and self.receive_data[1] == 0x55:
                # print("read ori ", self.change_hex_to_int(self.receive_data))
                data_len = self.receive_data[2]
                if len(self.receive_data) < data_len + 4:
                    # 此处需要超时机制
                    # print("数据长度不够，等待下次读取")
                    # 超时退出
                    # if not self.serial_handle.txdone():
                    #     return None
                    # n += 1
                    # if n > out_time_n:
                    #     return None
                    # time.sleep(0.01)
                    continue
                _data = self.receive_data[3 : data_len + 4]
                # 更新缓存区
                self.receive_data = self.receive_data[data_len + 4 :]
                # 校验数据
                if 0xFF & ~sum(_data[:-1]) == _data[-1]:
                    # print("receive_data:", self.change_hex_to_int(self.receive_data[:-1]))
                    return _data[:-1]
                else:
                    return None
            else:
                # print("起始位不是 55 55 进行移除", self.receive_data[0])
                # 起始位不是 55 55 进行移除
                while self.receive_data:
                    if len(self.receive_data) == 1:
                        if self.receive_data[0] == 0x55:
                            break
                        else:
                            self.receive_data = b""
                    else:
                        if (
                            self.receive_data[0] == 0x55
                            and self.receive_data[1] == 0x55
                        ):
                            break
                        else:
                            self.receive_data = self.receive_data[1:]

    def write_cmd(self, serial_handle,data: list):
        if serial_handle:
            # data = [(0xff & par1), (0xff & (par1 >> 8))]
            # self.clearn_flush()
            buf = bytearray(b"")
            buf.extend([0x55, 0x55, (0xFF & len(data))])
            buf.extend(data)
            buf.extend([0xFF & ~sum(data)])
            # 55 55 02 5a 01 a4
            # print("send buf  {}".format(self.change_hex_to_int(buf)))
            try:
                serial_handle.write(buf)
                return True
            except:
                serial_handle = None
                _recv_data = b""
                return False