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  • 请问用uart进行串口通信,要调用哪个函数才能读入



    • import sensor, image, time,pyb
      from pyb import UART
      import json
      
      thresholds = [(-5,35, 20, 60, 0, 40), # generic_red红_thresholds
                    (10, 70, -40, -20, 0, 20), # generic_green绿_thresholds
                    (15,45, 0, 35, -60, -30)] # generic_blue蓝_thresholds
      uart = UART(3, 9600)
      
      ledR=  pyb.LED(1)
      ledG=  pyb.LED(2)
      ledB=  pyb.LED(3)
      led=  pyb.LED(1) # Red LED = 1, Green LED = 2, Blue LED = 3, IR LEDs = 4.
      
      def R():
          ledR.on()            #亮灯
          time.sleep(1000)     #延时150ms
          ledR.off()           #暗灯
          time.sleep(500)
      def B():
          ledB.on()            #亮灯
          time.sleep(1000)     #延时150ms
          ledB.off()           #暗灯
          time.sleep(500)
      def G():
          ledG.on()            #亮灯
          time.sleep(1000)     #延时150ms
          ledG.off()           #暗灯
          time.sleep(500)
      
      sensor.reset()
      sensor.set_pixformat(sensor.RGB565)
      sensor.set_framesize(sensor.QVGA)
      sensor.skip_frames(time = 2000)
      sensor.set_auto_gain(False) # must be turned off for color tracking
      sensor.set_auto_whitebal(False) # must be turned off for color tracking
      clock = time.clock()
      
      
      
      def twoley():
          while(True):
              clock.tick()
              img = sensor.snapshot()
              img.lens_corr(1.8)#
              for code  in  img.find_qrcodes():
                  img.draw_rectangle(code.rect(), color   =(255,0,0))
                  message =   code.payload()
                  a=int(message)
      
                  if a==123:
                      while(True):
                          R()
                          G()
                          B()
                          print(a)
                          uart.write('123')
      
                  
                      
      
           
                          
      
                         
          
      
      def yanshe():
          while(True):
              clock.tick()
              img = sensor.snapshot()
              for blob in img.find_blobs([thresholds[0]], pixels_threshold=200, area_threshold=200):
                      img.draw_rectangle(blob.rect())
                      img.draw_cross(blob.cx(), blob.cy())
                      a=blob.cx()
              for blob in img.find_blobs([thresholds[1]], pixels_threshold=200, area_threshold=200):
                      img.draw_rectangle(blob.rect())
                      img.draw_cross(blob.cx(), blob.cy())
                      b=blob.cx()
              for blob in img.find_blobs([thresholds[2]], pixels_threshold=200, area_threshold=200):
                      img.draw_rectangle(blob.rect())
                      img.draw_cross(blob.cx(), blob.cy())
                      c=blob.cx()
                      time.sleep(500)
                      if a<b :
                          if a<c :
                              if b<c :
                                  print(3,2,1)
                                  uart.write('out\n')
                              else :
                                  print(2,3,1)
                          else :
                              print(2,1,3)
                      else :
                           if b<c :
                               if a<c :
                                    print(3,1,2)
                               else :
                                    print(1,3,2)
                           else :
                                print(1,2,3)
      
      while(True):
          flag=uart.read(0)
      
          if  flag==1:
              twoley()
      
          elif flag==0:
              yanshe()
      


    • if uart.any():
          uart.read()
      


    • 那我要问呢吧读到的数据进行赋值呢



    • 数据=uart.read()



    • 咱们这个串口输出的数据类型是哪种?要怎么转换才能让51单片机识别?谢谢了



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