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  • 我想发送四个数据,但是只能接收两个,如何增加arduino接受openmv发送的数据



    • 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)
      
      def find_max(blobs):
          max_size=0
          for blob in blobs:
              if blob[2]*blob[3] > max_size:
                  max_blob=blob
                  max_size = blob[2]*blob[3]
          return max_blob
      
      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],area_threshold=3000)
          if blobs:
              data=[]
              max_blob = find_max(blobs)
      
      
              img.draw_rectangle(max_blob[0:4])
              img.draw_cross(max_blob[5], max_blob[6]) # cx, cy
              data.append((max_blob[5], max_blob[6],max_blob[2],max_blob[3]))
      
              #{(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!")
      

      ARDUINNO代码

      #include <SoftwareSerial.h>
      
      SoftwareSerial softSerial(10, 11); // RX, TX
      
      typedef struct
      {
        int data[50][3] = {{0,0,0}};
        int len = 0;
      }List;
      List list;
      
      void setup() {
        // put your setup code here, to run once:
        softSerial.begin(115200);
        Serial.begin(115200);
      }
      
      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.print('\n');
            Serial.println(list.data[i][2]);
            Serial.print('\t');
            Serial.println(list.data[i][3]);
          }
          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();
            list.data[list.len][1] = numStr.toInt();
            list.data[list.len][2] = numStr.toInt();
            numStr = "";
          }
          else if(s[i]==')'){
            list.data[list.len][3] = numStr.toInt();
            numStr = "";
            list.len++;
          }
          else{
            numStr += s[i];
          }
        }
      }