55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
// 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 "LedDeviceLpd8806.h"
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LedDeviceLpd8806::LedDeviceLpd8806(const std::string& outputDevice, const unsigned baudrate) :
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LedSpiDevice(outputDevice, baudrate),
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_ledBuffer(0)
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{
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// empty
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}
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int LedDeviceLpd8806::write(const std::vector<ColorRgb> &ledValues)
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{
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const unsigned clearSize = ledValues.size()/32+1;
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// Reconfigure if the current connfiguration does not match the required configuration
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if (3*ledValues.size() + clearSize != _ledBuffer.size())
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{
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// Initialise the buffer
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_ledBuffer.resize(3*ledValues.size() + clearSize, 0x00);
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// Perform an initial reset to start accepting data on the first led
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writeBytes(clearSize, _ledBuffer.data());
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}
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// Copy the colors from the ColorRgb vector to the Ldp8806 data vector
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for (unsigned iLed=0; iLed<ledValues.size(); ++iLed)
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{
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const ColorRgb& rgb = ledValues[iLed];
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_ledBuffer[iLed*3] = 0x80 | (rgb.red >> 1);
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_ledBuffer[iLed*3+1] = 0x80 | (rgb.green >> 1);
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_ledBuffer[iLed*3+2] = 0x80 | (rgb.blue >> 1);
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}
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// Write the data
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if (writeBytes(_ledBuffer.size(), _ledBuffer.data()) < 0)
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{
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return -1;
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}
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return 0;
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}
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int LedDeviceLpd8806::switchOff()
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{
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return write(std::vector<ColorRgb>(_ledBuffer.size(), ColorRgb{0,0,0}));
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}
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