140 lines
3.0 KiB
Plaintext
140 lines
3.0 KiB
Plaintext
import processing.serial.*;
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//String serial_port="COM3";
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String serial_port="/dev/ttyACM0";
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Serial serial;
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String serialString=""; //last read string
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int serial_endchar=10; //10=ASCII Linefeed
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float lastValue=0;
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int valueNum=100;
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float[] valueArray= new float[valueNum];
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int valueArrayPos=0; //next to be written array position
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long restartTime=0;
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boolean running=false;
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float resultAverage=0;
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float resultSpan=0;
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color bg=color(0);
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color text=color(255);
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Table table;
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void setup() {
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size(400, 200);
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frameRate(100);
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printArray(Serial.list());
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// Open the port you are using at the rate you want:
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serial = new Serial(this, serial_port, 115200);
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serial.clear();
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// Throw out the first reading, in case we started reading
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// in the middle of a string from the sender.
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println("readUntil");
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serialString = serial.readStringUntil(serial_endchar);
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println("read:"+serialString);
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serialString = null;
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table = new Table();
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table.addColumn("id");
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table.addColumn("value");
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}
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void draw() {
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if (serial.available() > 0) {
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serialString = serial.readStringUntil(serial_endchar);
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if (serialString != null) {
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serialString=trim(serialString);
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//println(serialString);
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String[] list = split(serialString, ',');
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lastValue=parseFloat(list[0]);
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if (running) {
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processNewValue(lastValue);
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if (valueArrayPos>=valueArray.length) { //full
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running=false;
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resultAverage=getAverage();
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resultSpan=getSpan();
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println("Finished reading "+valueNum+ " values in "+(millis()-restartTime)+" ms");
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println("Average="+resultAverage);
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println("Span="+resultSpan);
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}
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}
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}
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}
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background(bg);
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textAlign(LEFT);
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textSize(16);
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text(lastValue, 8,16);
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textAlign(CENTER);
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textSize(48);
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text(resultAverage, width/2,height/3);
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textAlign(CENTER);
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textSize(16);
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text("Span", width/2,height-48-20);
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textSize(48);
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text(resultSpan, width/2,height-20);
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}
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void keyPressed() {
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println("key="+keyCode);
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if (keyCode==10) { //10=enter
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println("restart");
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valueArrayPos=0;
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restartTime=millis();
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running=true;
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}else if(keyCode==83){ //83=s save
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print("save value to table. ");
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TableRow newRow = table.addRow();
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newRow.setInt("id", table.getRowCount() - 1);
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newRow.setFloat("value", resultAverage);
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println("table size="+table.getRowCount());
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}else if(keyCode==87) { //87=w write to file
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String tableFilename="new.csv";
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println("write table to file "+tableFilename);
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saveTable(table, tableFilename);
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}
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}
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void processNewValue(float v) {
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if (valueArrayPos<valueArray.length){ //not full
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valueArray[valueArrayPos]=v;
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valueArrayPos++;
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}
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}
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float getAverage() {
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float average = 0;
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for ( int i = 0; i < valueArray.length; ++i )
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{
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average += valueArray[i];
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}
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average /= (float)(valueArray.length);
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return average;
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}
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float getSpan() {
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return max(valueArray)-min(valueArray);
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}
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