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57 lines
1.2 KiB
C++
57 lines
1.2 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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// 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 "LedDeviceP9813.h"
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LedDeviceP9813::LedDeviceP9813(const std::string& outputDevice, const unsigned baudrate) :
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LedSpiDevice(outputDevice, baudrate, 0),
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_ledCount(0)
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{
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// empty
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}
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int LedDeviceP9813::write(const std::vector<ColorRgb> &ledValues)
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{
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if (_ledCount != ledValues.size())
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{
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_ledBuf.resize(ledValues.size() * 4 + 8, 0x00);
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_ledCount = ledValues.size();
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}
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uint8_t * dataPtr = _ledBuf.data();
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for (const ColorRgb & color : ledValues)
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{
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*dataPtr++ = calculateChecksum(color);
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*dataPtr++ = color.blue;
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*dataPtr++ = color.green;
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*dataPtr++ = color.red;
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}
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return writeBytes(_ledBuf.size(), _ledBuf.data());
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}
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int LedDeviceP9813::switchOff()
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{
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return write(std::vector<ColorRgb>(_ledCount, ColorRgb{0,0,0}));
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}
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uint8_t LedDeviceP9813::calculateChecksum(const ColorRgb & color) const
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{
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uint8_t res = 0;
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res |= (uint8_t)0x03 << 6;
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res |= (uint8_t)(~(color.blue >> 6) & 0x03) << 4;
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res |= (uint8_t)(~(color.green >> 6) & 0x03) << 2;
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res |= (uint8_t)(~(color.red >> 6) & 0x03);
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return res;
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}
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