基于python的环境噪声监测报警系统实例解析

def uart_recv_header(serial):
    cnt=0
    while True:
            data=serial.port.read()
            if data == b'\xff':
                    data_next=serial.port.read()
                    if data_next == b'\xff':
                        cnt += 1
                        data_lens=serial.port.read(2)
                        data_audio=serial.port.read(2)
                        count=len(data_audio)/2
                        var=struct.unpack('h'*int(count),data_audio)
                        global db_val
                        db_val = float(var[0]/100)

                        print(float(var[0]/100))

def update_data():

    db_ay.pop(0)
    db_ay.append(db_val)
    print("timer is occured is:",db_val)
    dpg.set_value('series_tag', [time_ax, db_ay])
    dpg.set_item_label('series_tag', "nosie val:"+str(db_val)+":db")