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  • 利用以下代码和接线方式完成arduino和openmv通信,为什么arduino串口显示的是乱码?



    • 我的接线方式是arduino和openmv先分别连在同一个电脑上,然后他们之间用三根杜邦线连接起来,arduino的10、11连openmv的p4、p5,还有一根线是arduino的GND连openmv的GND。

      这是openmv代码

      import sensor, image, time
      import json
      from pyb import UART
      # For color tracking to work really well you should ideally be in a very, very,
      # very, controlled enviroment where the lighting is constant...
      yellow_threshold   = ( 46,  100,  -68,   72,   58,   92)
      # You may need to tweak the above settings for tracking green things...
      # Select an area in the Framebuffer to copy the color settings.
      
      sensor.reset() # Initialize the camera sensor.
      sensor.set_pixformat(sensor.RGB565) # use RGB565.
      sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
      sensor.skip_frames(10) # Let new settings take affect.
      sensor.set_auto_whitebal(False) # turn this off.
      clock = time.clock() # Tracks FPS.
      
      uart = UART(3, 115200)
      
      while(True):
          clock.tick() # Track elapsed milliseconds between snapshots().
          img = sensor.snapshot() # Take a picture and return the image.
      
          blobs = img.find_blobs([yellow_threshold])
          if blobs:
              #print('sum : %d'% len(blobs))
              data=[]
              for b in blobs:
                  # Draw a rect around the blob.
                  img.draw_rectangle(b.rect()) # rect
                  img.draw_cross(b.cx(), b.cy()) # cx, cy
                  data.append((b.cx(),b.cy()))
      
              #{(1,22),(-3,33),(22222,0),(9999,12),(0,0)}
              data_out = json.dumps(set(data))
              uart.write(data_out +'\n')
              print('you send:',data_out)
          else:
              print("not found!")
      

      这是arduino代码

      #include <SoftwareSerial.h>
      
      SoftwareSerial softSerial(10, 11); // RX, TX
      typedef struct
      {
        int data[50][2] = {{0,0}};
        int len = 0;
      }List;
      List list;
      
      void setup() {
        // put your setup code here, to run once:
        softSerial.begin(9600);
        Serial.begin(9600);
      }
      
      void loop() {
        if(softSerial.available())
        {
          getList();
          for (int i=0; i<list.len; i++)
          {
            Serial.print(list.data[i][0]);
            Serial.print('\t');
            Serial.println(list.data[i][1]);
          }
          Serial.println("============");
          clearList();
        }
      
      }
      
      
      String detectString()
      {
        while(softSerial.read() != '{');
        return(softSerial.readStringUntil('}'));
      }
      void clearList()
      {
        memset(list.data, sizeof(list.data),0);
        list.len = 0;
      }
      void getList()
      {
        String s = detectString();
        String numStr = "";
        for(int i = 0; i<s.length(); i++)
        {
          if(s[i]=='('){
            numStr = "";
          }
          else if(s[i] == ','){
            list.data[list.len][0] = numStr.toInt();
            numStr = "";
          }
          else if(s[i]==')'){
            list.data[list.len][1] = numStr.toInt();
            numStr = "";
            list.len++;
          }
          else{
            numStr += s[i];
          }
        }
      }
      

      0_1603526603772_QQ截图20201024155640.png 0_1603526616295_QQ截图20201024155706.png



    • 你的波特率不匹配呀。