Question

我对Arduino的编码相对较新，因此希望能获得一些帮助，以使我重回正确的道路。我想要实现的是将值（在txt文件的每一行上一个值）从计算机上的文件发送到Arduino-Due（希望我已经通过使用处理代码来解决此问题，该处理代码通过以下方式将数据作为字符串发送）我目前正在苦苦挣扎的是让Arduino读取字符串，将其转换为浮点值，然后从DAC1引脚输出特定电压。任何帮助将不胜感激。

Arudino代码：

const byte buffSize = 40;
char inputBuffer[buffSize];
byte bytesRecvd = 0;
boolean readInProgress = false;
boolean newDataFromPC = false;

float currentVal = 0.0;
float writingValue();

//=============

void setup() {
 Serial.begin(9600);          //Initialises serial port at 9600 Baud rate
 analogWriteResolution(12);   //Sets analog write resolution (number of bits)
 analogReadResolution(12);    //Sets analog write resolution (number of bits)
 pinMode(DAC1,OUTPUT);        //Sets DAC1 pin as an input
 analogWrite(DAC1,(0));       //Writes the initial analog value as 0
}

//=============

void loop() {
  getDataFromPC();
  currentValToPSU();
}

//=============

void getDataFromPC() {

// receive data from PC and save it into inputBuffer

  if(Serial.available() > 0) {

    char x = Serial.read();

    if(readInProgress) {
      inputBuffer[bytesRecvd] = x;
      bytesRecvd ++;
      if (bytesRecvd == buffSize) {
        bytesRecvd = buffSize - 1;
      }
    }
  }
}

//=============

void parseData() {

  char * strtokIndx; // this is used by strtok() as an index

  strtokIndx = strtok(NULL, "\n"); 
  currentVal = atof(strtokIndx);     // convert this part to a float
}

//=============

void currentValToPSU() {
  analogWrite(DAC1,(4095*((currentVal-0.0927)/7.959)));
}

处理代码：

import processing.serial.*;

Serial comPort;
int counter=0; // Helps to keep track of values sent.
int numItems=0; //Keep track of the number of values in text file
boolean sendStrings=false; //Turns sending on and off
StringLoader sLoader; //Used to send values to Arduino

void setup(){
 comPort = new Serial(this, Serial.list()[0], 9600);
 background(255,0,0); //Start with a Red background
}

void draw(){
}


void mousePressed() {
 //Toggle between sending values and not sending values
 sendStrings=!sendStrings;

 //If sendStrings is True - then send values to Arduino
 if(sendStrings){
 background(0,255,0); //Change the background to green

 /*When the background is green, transmit text file values to the Arduino */
 sLoader=new StringLoader();
 sLoader.start();
 }else{
 background(255,0,0); //Change background to red
 //Reset the counter
 counter=0;
 }
}

/*============================================================*/
/* The StringLoader class imports data from a text file
 on a new Thread and sends each value once every half second */
public class StringLoader extends Thread{

 public StringLoader(){
 //default constructor
 }

 public void run() {
 String textFileLines[]=loadStrings("processingData.txt");
 numItems=textFileLines.length;
 for(int i = counter; i<numItems; i++){
 comPort.write(textFileLines[i]);
 delay(5000);
 }
 counter=numItems;
 }
}

Arduino-Due通过串行从Processing接收字符串

0 个答案: