hyperion.ng/libsrc/leddevice/LedDeviceTpm2.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 "LedDeviceTpm2.h"
LedDeviceTpm2::LedDeviceTpm2(const std::string& outputDevice, const unsigned baudrate) :
LedRs232Device(outputDevice, baudrate),
_ledBuffer(0)
{
// empty
}
int LedDeviceTpm2::write(const std::vector<ColorRgb> &ledValues)
{
if (_ledBuffer.size() == 0)
{
_ledBuffer.resize(5 + 3*ledValues.size());
_ledBuffer[0] = 0xC9; // block-start byte
_ledBuffer[1] = 0xDA; // DATA frame
_ledBuffer[2] = ((3 * ledValues.size()) >> 8) & 0xFF; // frame size high byte
_ledBuffer[3] = (3 * ledValues.size()) & 0xFF; // frame size low byte
_ledBuffer.back() = 0x36; // block-end byte
}
// write data
memcpy(4 + _ledBuffer.data(), ledValues.data(), ledValues.size() * 3);
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}
int LedDeviceTpm2::switchOff()
{
memset(4 + _ledBuffer.data(), 0, _ledBuffer.size() - 5);
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}