hyperion.ng/libsrc/leddevice/LedDeviceLpd8806.cpp
redPanther d6a34edfb2 Leddevice refactoring the next part (#253)
* add general switchOff

* refactoring of leddevices regarding ledcount and switchoff

* remove obsolete includes
2016-09-23 08:49:22 +02:00

40 lines
1.1 KiB
C++

#include "LedDeviceLpd8806.h"
LedDeviceLpd8806::LedDeviceLpd8806(const Json::Value &deviceConfig)
: ProviderSpi(deviceConfig)
{
}
LedDevice* LedDeviceLpd8806::construct(const Json::Value &deviceConfig)
{
return new LedDeviceLpd8806(deviceConfig);
}
int LedDeviceLpd8806::write(const std::vector<ColorRgb> &ledValues)
{
const unsigned clearSize = _ledCount/32+1;
unsigned messageLength = 3*_ledCount + clearSize;
// Reconfigure if the current connfiguration does not match the required configuration
if (messageLength != _ledBuffer.size())
{
// Initialise the buffer
_ledBuffer.resize(messageLength, 0x00);
// Perform an initial reset to start accepting data on the first led
writeBytes(clearSize, _ledBuffer.data());
}
// Copy the colors from the ColorRgb vector to the Ldp8806 data vector
for (unsigned iLed=0; iLed<(unsigned)_ledCount; ++iLed)
{
const ColorRgb& rgb = ledValues[iLed];
_ledBuffer[iLed*3] = 0x80 | (rgb.red >> 1);
_ledBuffer[iLed*3+1] = 0x80 | (rgb.green >> 1);
_ledBuffer[iLed*3+2] = 0x80 | (rgb.blue >> 1);
}
// Write the data
return (writeBytes(_ledBuffer.size(), _ledBuffer.data()) < 0) ? -1 : 0;
}