hyperion.ng/libsrc/leddevice/LedDeviceAdalightApa102.cpp

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// STL includes
#include <cstring>
#include <cstdio>
#include <iostream>
// Linux includes
#include <fcntl.h>
#include <sys/ioctl.h>
// hyperion local includes
#include "LedDeviceAdalightApa102.h"
LedDeviceAdalightApa102::LedDeviceAdalightApa102(const std::string& outputDevice, const unsigned baudrate, int delayAfterConnect_ms) :
LedRs232Device(outputDevice, baudrate, delayAfterConnect_ms),
_ledBuffer(0),
_timer()
{
// setup the timer
_timer.setSingleShot(false);
_timer.setInterval(5000);
connect(&_timer, SIGNAL(timeout()), this, SLOT(rewriteLeds()));
// start the timer
_timer.start();
}
//comparing to ws2801 adalight, the following changes were needed:
// 1- differnt data frame (4 bytes instead of 3)
// 2 - in order to accomodate point 1 above, number of leds sent to adalight is increased by 1/3rd
int LedDeviceAdalightApa102::write(const std::vector<ColorRgb> & ledValues)
{
ledCount = ledValues.size();
const unsigned int startFrameSize = 4;
const unsigned int endFrameSize = std::max<unsigned int>(((ledCount + 15) / 16), 4);
const unsigned int mLedCount = (ledCount * 4) + startFrameSize + endFrameSize;
if(_ledBuffer.size() != mLedCount+6){
_ledBuffer.resize(mLedCount+6, 0x00);
_ledBuffer[0] = 'A';
_ledBuffer[1] = 'd';
_ledBuffer[2] = 'a';
_ledBuffer[3] = (((unsigned int)(ledValues.size())) >> 8) & 0xFF; // LED count high byte
_ledBuffer[4] = ((unsigned int)(ledValues.size())) & 0xFF; // LED count low byte
_ledBuffer[5] = _ledBuffer[3] ^ _ledBuffer[4] ^ 0x55; // Checksum
}
for (unsigned iLed=1; iLed<=ledCount; iLed++) {
const ColorRgb& rgb = ledValues[iLed-1];
_ledBuffer[iLed*4+6] = 0xFF;
_ledBuffer[iLed*4+1+6] = rgb.red;
_ledBuffer[iLed*4+2+6] = rgb.green;
_ledBuffer[iLed*4+3+6] = rgb.blue;
}
// restart the timer
_timer.start();
// write data
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}
int LedDeviceAdalightApa102::switchOff()
{
for (unsigned iLed=1; iLed<=ledCount; iLed++) {
_ledBuffer[iLed*4+6] = 0xFF;
_ledBuffer[iLed*4+1+6] = 0x00;
_ledBuffer[iLed*4+2+6] = 0x00;
_ledBuffer[iLed*4+3+6] = 0x00;
}
// restart the timer
_timer.start();
// write data
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}
void LedDeviceAdalightApa102::rewriteLeds()
{
writeBytes(_ledBuffer.size(), _ledBuffer.data());
}