51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
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// STL includes
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#include <cstring>
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#include <cstdio>
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#include <iostream>
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#include <algorithm>
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// Linux includes
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#include <fcntl.h>
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#include <sys/ioctl.h>
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// hyperion local includes
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#include "LedDeviceAPA102.h"
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LedDeviceAPA102::LedDeviceAPA102(const std::string& outputDevice, const unsigned baudrate)
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: LedSpiDevice(outputDevice, baudrate, 500000)
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, _ledBuffer(0)
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{
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}
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int LedDeviceAPA102::write(const std::vector<ColorRgb> &ledValues)
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{
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_mLedCount = ledValues.size();
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const unsigned int startFrameSize = 4;
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const unsigned int endFrameSize = std::max<unsigned int>(((_mLedCount + 15) / 16), 4);
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const unsigned int APAbufferSize = (_mLedCount * 4) + startFrameSize + endFrameSize;
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if(_ledBuffer.size() != APAbufferSize){
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_ledBuffer.resize(APAbufferSize, 0xFF);
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_ledBuffer[0] = 0x00;
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_ledBuffer[1] = 0x00;
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_ledBuffer[2] = 0x00;
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_ledBuffer[3] = 0x00;
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}
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for (unsigned iLed=0; iLed < _mLedCount; ++iLed) {
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const ColorRgb& rgb = ledValues[iLed];
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_ledBuffer[4+iLed*4] = 0xFF;
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_ledBuffer[4+iLed*4+1] = rgb.red;
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_ledBuffer[4+iLed*4+2] = rgb.green;
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_ledBuffer[4+iLed*4+3] = rgb.blue;
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}
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return writeBytes(_ledBuffer.size(), _ledBuffer.data());
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}
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int LedDeviceAPA102::switchOff()
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{
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return write(std::vector<ColorRgb>(_mLedCount, ColorRgb{0,0,0}));
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}
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