4. 升级固件后openmv不好用，没升级前收到命令直接识别出来，升级后发送命令，需要多次才能实现扫码
  • OpenMV VSCode 扩展发布了，在插件市场直接搜索OpenMV就可以安装
  • 如果有产品硬件故障问题，比如无法开机，论坛很难解决。可以直接找售后维修。
  • 发帖子之前，请确认看过所有的视频教程，https://singtown.com/learn/ 和所有的上手教程http://book.openmv.cc/
  • 每一个新的提问，单独发一个新帖子
  • 帖子需要目的，你要做什么？
  • 如果涉及代码，需要报错提示与全部代码文本，请注意不要贴代码图片
  • 必看：玩转星瞳论坛了解一下图片上传，代码格式等问题。

    • 升级固件后openmv不好用，没升级前收到命令直接识别出来，升级后发送命令，需要多次才能实现扫码

    • K

      Untitled - By: STM32 - 周四 四月 19 2018

      import sensor, image,time,lcd
      from pyb import UART,Timer,LED

      sensor.reset()
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QVGA)#320*240

      sensor.skip_frames()
      sensor.set_auto_whitebal(False) #关闭白平衡
      sensor.set_auto_gain(False) #关闭自动增益
      clock = time.clock()
      lcd.init() #Initialize the lcd screen.
      uart = UART(3,115200,8,None,1) #创建串口对象

      data = []

      LED_Red = LED(1)
      LED_Green = LED(2)
      LED_Blue = LED(3)

      tim = Timer(4,freq=1) # create a timer object using timer 4
      #tim.callback(tick)
      tim.deinit()

      FlagOK = 0
      show_numTab = ["0","1","2","3","4","5","6","7","8","9"]
      num = 0
      returnData = [0x55,0x02,0x92,0x02,0x02,0x00,0x00,0xBB] #识别失败
      runData = [0x55,0x02,0x92,0x03,0x02,0x00,0x00,0xBB] #正在识别

      #定时器回调函数
      def tick(timer): # we will receive the timer object when being called
      global FlagOK,num,returnData
      print("Timer callback")
      num = num-1
      if(num == 0):
      num = 9
      FlagOK = 2
      tim.deinit()

      #串口发送函数
      def USART_Send(src,length):
      for i in range(length):
      uart.writechar(src[i])

      二维码识别，并返回识别结果

      def Color_Check(srcbuf):
      global FlagOK,num
      if(FlagOK == 1):
      img.draw_string(100, 180,"open"+show_numTab[num],color=[255,0,0])
      for code in img.find_qrcodes():
      FlagOK = 0
      tim.deinit()
      print(code)
      qr_Tab = code.payload()
      uart.writechar(0x55)
      uart.writechar(0x02)
      uart.writechar(0x92)
      uart.writechar(0x01)
      uart.writechar(len(qr_Tab))
      for qrdata in qr_Tab:
      uart.writechar(ord(qrdata))
      uart.writechar(0xBB)

      if(FlagOK == 2):
    for rdata in returnData:
        uart.writechar(rdata)
    FlagOK = 0

      while(True):

      img = sensor.snapshot()

if(uart.any()):
    data = uart.read(8)
    if( len(data) >= 8):
        if((data[0] == 0x55)&(data[1] == 0x02)&(data[7] == 0xBB)):
            if(data[2] == 0x91):
                print("识别小球")
            if(data[2] == 0x92):
                print("识别二维码")
                if(data[3] == 0x01):    #启动识别
                    if(FlagOK == 0):
                        FlagOK = 1
                        num = 9
                        print("开始识别")
                        tim.callback(tick)
                    else:
                        print("正在识别")
                        for rdata in runData:
                            print(rdata)
                            uart.writechar(rdata)
                if(data[3] == 0x02):
                    print("停止识别")
                    FlagOK = 2
                    tim.deinit()       #定时器停止

Color_Check(data)

img.draw_string(110, 40,"qr_CodeV1.0",color=[0,0,255])
lcd.display(img)

      请在这里粘贴代码
      0