Question

我正试图通过发送4个电位计值。 i2c从另一个arduino通过虚拟线路接收到这些值之后。我的设置包括3个arduinos。第一个arduino连接到变送器和4个电位器。它通过发送值。 tx通过virtualwire。第二个arduino由接收器组成。第3 arduino由4个伺服系统组成。第2和第3 arduino通过耦合。一辆i2c总线。我无法发送所有4个potrentiometer值。但是我能够发送一个单独的电位计值。这是我的草图。

  #include <VirtualWire.h>                                                                     
  #include <Wire.h>                                                                            

  int Sensor1Data;                                                                             //  VARIABLE WHERE THE ANALOG VALUE OF POT 1 GOT STORED BY THE TX
  int Sensor2Data;                                                                             //  VARIABLE WHERE THE ANALOG VALUE OF POT 2 GOT STORED BY THE TX
  int Sensor3Data;                                                                             //  VARIABLE WHERE THE ANALOG VALUE OF POT 3 GOT STORED BY THE TX
  int Sensor4Data;                                                                             //  VARIABLE WHERE THE ANALOG VALUE OF POT 4 GOT STORED BY THE TX
  int data[4];

  char StringReceived[22]; 

  void setup() 
  {

   Wire.begin();                                                                                     //  START I2C (WIRE.h)
   vw_setup(6000);                                                                           //  BAUDERATE FOR VIRTUALWIRE
   vw_set_rx_pin(11);                                                                        //  DEFINE PIN FOR VIRTUALWIRE
   vw_rx_start();                                                                            //  START VIRTUALWIRE                                           
   } 

   void loop()
   {

     uint8_t buf[VW_MAX_MESSAGE_LEN];
     uint8_t buflen = VW_MAX_MESSAGE_LEN;

     if (vw_get_message(buf, &buflen)) {                                                       // GET THE DATA

    int i;
    for (i = 0; i < buflen; i++) 
    {                                                       // CHECKSUM OK ? GET MESSAGE           
      StringReceived[i] = char(buf[i]);                                                   // FILL THE ARRAY 
    } 
  sscanf(StringReceived, "%d,%d,%d,%d,%d,%d",&Sensor1Data, &Sensor2Data,&Sensor3Data,&Sensor4Data); // Converts a string to an array

  Sensor1Data = map(Sensor1Data, 0, 1023, 0, 180);                                                 //  MAPS THE 8BIT SERVODATA TO SERVOMIN/MX
  Sensor2Data = map(Sensor2Data, 0, 1023, 26, 160);                                                 //  MAPS THE 8BIT SERVODATA TO SERVOMIN/MX
  Sensor3Data = map(Sensor3Data, 0, 1023, 26, 160);                                                 //  MAPS THE 8BIT SERVODATA TO SERVOMIN/MX
  Sensor4Data = map(Sensor4Data, 0, 1023, 26, 160);
  data[0] = Sensor1Data;
  data[1] = Sensor2Data;
  data[2] = Sensor3Data;
  data[3] = Sensor4Data;//  MAPS THE 8BIT SERVODATA TO SERVOMIN/MX

  Wire.beginTransmission(8);                                                                        //  OPENS AN I2C ON PIN 8
  Wire.write(data,4);
 //  SEND POT 1 VALUE TO I2C DEVICE 8
  Wire.endTransmission();                                                                           //  END TRANSMISSION

 //  SEND POT 1 VALUE TO I2C DEVICE 8

     }

      memset( StringReceived, 0, sizeof( StringReceived));                                                   // RESET STRING RECEIVED
 }`

此草图显示的错误

     no matching function for call to 'TwoWire::write(int [4], int)'

Answer 1

您无法使用import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.SwingUtilities; import javax.swing.WindowConstants; public class DemoPoly { private JFrame frame; public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new DemoPoly().createAndShowGui(); } }); } public void createAndShowGui() { frame = new JFrame(getClass().getSimpleName()); CustomPanel cp = new CustomPanel(); cp.setBackground(Color.RED); frame.add(cp); frame.pack(); frame.setVisible(true); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } } class CustomPanel extends JPanel { @Override public void paintComponent(Graphics g) { super.paintComponent(g); } @Override public Dimension getPreferredSize() { return new Dimension(300, 300); } }发送一组整数。它只接受一个字节或一个字节数组。

因为您的数组值不大于160，所以您只需将数组更改为字节数组。

变化：

TwoWire::write

为：

int data[4];

无法通过i2c总线发送4个电位计值

1 个答案: