mirror of https://github.com/nymea/nymea.git
119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
#include "radio433.h"
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#include <QDebug>
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#include <sys/time.h>
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Radio433::Radio433(QObject *parent) :
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QObject(parent)
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{
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// Set up receiver
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m_receiver = new Gpio(this,27);
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m_receiver->setDirection(INPUT);
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m_receiver->setEdgeInterrupt(EDGE_BOTH);
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// Set up transmitter
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m_transmitter = new Gpio(this,22);
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m_transmitter->setDirection(OUTPUT);
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m_transmitter->setValue(LOW);
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connect(m_receiver, &Gpio::pinInterrupt, this, &Radio433::handleInterrupt);
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m_receiver->start();
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}
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Radio433::~Radio433()
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{
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m_receiver->quit();
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m_receiver->wait();
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}
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void Radio433::sendData(QList<int> rawData)
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{
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//first we have to disable our receiver, to prevent reading this signal
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m_receiver->stop();
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m_transmitter->setValue(LOW);
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int flag=1;
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for(int i = 0; i <= 8; i++){
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foreach (int delay, rawData) {
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// 1 = High, 0 = Low
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m_transmitter->setValue(flag %2);
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flag++;
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delayMicros(delay);
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}
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}
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m_transmitter->setValue(LOW);
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// re-enable it
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m_transmitter->setValue(LOW);
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m_receiver->start();
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}
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int Radio433::micros()
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{
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struct timeval tv ;
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int now ;
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gettimeofday (&tv, NULL) ;
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now = (int)tv.tv_sec * (int)1000000 + (int)tv.tv_usec ;
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return (int)(now - m_epochMicro) ;
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}
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void Radio433::delayMicros(int microSeconds)
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{
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struct timespec sleeper;
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sleeper.tv_sec = 0;
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sleeper.tv_nsec = (long)(microSeconds * 1000);
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nanosleep (&sleeper, NULL) ;
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}
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void Radio433::handleInterrupt()
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{
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long currentTime = micros();
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m_duration = currentTime - m_lastTime;
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// filter nois
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if (m_duration > 5000 && m_duration > m_timings[0] - 200 && m_duration < m_timings[0] + 200) {
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m_repeatCount++;
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m_changeCount--;
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if(m_repeatCount == 2) {
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// if we have a regular signal (1 bit sync + 48 bit data)
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if(m_changeCount == RC_MAX_CHANGES){
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// write rawdata to a List and reset values to 0
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QList<int> rawData;
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for(int i = 0; i < RC_MAX_CHANGES; i++ ){
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rawData.append(m_timings[i]);
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m_timings[i] = 0;
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}
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// qDebug() << "-----------------------------------------------------------";
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// qDebug() << "| GENERIC signal |";
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// qDebug() << "-----------------------------------------------------------";
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// qDebug() << "delay :" << rawData.first() /31;
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// qDebug() << rawData;
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emit dataReceived(rawData);
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}
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m_repeatCount = 0;
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}
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m_changeCount = 0;
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}else if(m_duration > 5000){
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m_changeCount = 0;
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}
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if (m_changeCount > RC_MAX_CHANGES) {
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m_changeCount = 0;
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m_repeatCount = 0;
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}
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m_timings[m_changeCount++] = m_duration;
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m_lastTime = currentTime;
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}
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