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#include "scope.h" |
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#include <QPainter> |
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#include <iostream> |
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#include <stdio.h> |
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using namespace std; |
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#define LEN 128 |
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Scope::Scope(QWidget *parent) { |
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dataAquired=0; |
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updateTimer = new QTimer(this); |
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updateTimer->start(250); |
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connect(updateTimer, SIGNAL(timeout()), this, SLOT(getData())); |
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} |
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Scope::~Scope() { |
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delete [] data; |
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} |
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void Scope::paintEvent(QPaintEvent* event) { |
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if (dataAquired) { |
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QPainter painter(this); |
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painter.drawLine(9,45,9,300); |
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painter.drawLine(522,45,522,300); |
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painter.drawLine(9,45,522,45); |
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painter.drawLine(9,300,522,300); |
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int i; |
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for(i=0;i<LEN-1;i++) { |
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painter.drawLine(4*i+10,300-(unsigned char)data[i],4*i+4+10,300-(unsigned char)data[i+1]); |
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} |
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} |
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} |
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void Scope::getData() { |
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char c='a'; |
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data=new char[LEN*sizeof(char)]; |
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FILE *serial=fopen("/dev/ttyUSB0","r+"); |
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fwrite(&c,sizeof(char),1,serial); // ask for data |
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fread(data,sizeof(char),LEN,serial); // and take them |
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fclose(serial); |
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dataAquired=1; |
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update(); |
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} |
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