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  • 串口输出坐标,为什么会失败



    • import sensor, image, time
      from machine import UART
      
      uart = UART(2, baudrate=115200) 
      uart_num = 0   
      uart_array = [48,49,50,51,52,53,54,55,56,57]
      uart.write(uart_num.to_bytes(1, 'little')) 
      uart.write(bytearray(uart_array))
      uart.write(bytearray([0x41]))       # 发送一个十六进制数据
      sensor.reset()
      sensor.set_pixformat(sensor.RGB565) # grayscale is faster
      sensor.set_framesize(sensor.QQVGA)
      sensor.skip_frames(time = 2000)
      clock = time.clock()
      
      while(True):
          uart_num = uart.any()
          clock.tick()
          img = sensor.snapshot().lens_corr(1.8)
      
          # Circle objects have four values: x, y, r (radius), and magnitude. The
          # magnitude is the strength of the detection of the circle. Higher is
          # better...
      
          # `threshold` controls how many circles are found. Increase its value
          # to decrease the number of circles detected...
      
          # `x_margin`, `y_margin`, and `r_margin` control the merging of similar
          # circles in the x, y, and r (radius) directions.
      
          # r_min, r_max, and r_step control what radiuses of circles are tested.
          # Shrinking the number of tested circle radiuses yields a big performance boost.
      
          for c in img.find_circles(threshold = 2000, x_margin = 10, y_margin = 10, r_margin = 10,
                  r_min = 2, r_max = 100, r_step = 2):
              img.draw_circle(c.x(), c.y())
          if(uart_num):
              uart_str = uart.read(uart_num)
              uart.write(uart_str)
      


    • 我运行代码,报错是ValueError: UART(2) doesn't exist,请提供具体的硬件型号。



    • 改成串口2了,那再怎么版



    • @2nc3 你为什么用串口2,硬件上就没有串口2啊。

      先按照视频测试。
      https://singtown.com/learn/50235/



    • 说错了,用的是三



    • 就是有没有办法将遍历出来的圆的中心坐标一个个地表示出来,



    • @2nc3 看视频了吗,视频里有怎么拼装字符串。