hyperion.ng/libsrc/leddevice/dev_spi/LedDeviceSk6812SPI.cpp
2020-08-08 00:21:19 +02:00

83 lines
2.1 KiB
C++

#include "LedDeviceSk6812SPI.h"
LedDeviceSk6812SPI::LedDeviceSk6812SPI(const QJsonObject &deviceConfig)
: ProviderSpi(deviceConfig)
, _whiteAlgorithm(RGBW::WhiteAlgorithm::INVALID)
, SPI_BYTES_PER_COLOUR(4)
, bitpair_to_byte {
0b10001000,
0b10001100,
0b11001000,
0b11001100,
}
{
}
LedDevice* LedDeviceSk6812SPI::construct(const QJsonObject &deviceConfig)
{
return new LedDeviceSk6812SPI(deviceConfig);
}
bool LedDeviceSk6812SPI::init(const QJsonObject &deviceConfig)
{
_baudRate_Hz = 3000000;
bool isInitOK = false;
// Initialise sub-class
if ( ProviderSpi::init(deviceConfig) )
{
QString whiteAlgorithm = deviceConfig["whiteAlgorithm"].toString("white_off");
_whiteAlgorithm = RGBW::stringToWhiteAlgorithm(whiteAlgorithm);
if (_whiteAlgorithm == RGBW::WhiteAlgorithm::INVALID)
{
QString errortext = QString ("unknown whiteAlgorithm: %1").arg(whiteAlgorithm);
this->setInError(errortext);
isInitOK = false;
}
else
{
Debug( _log, "whiteAlgorithm : %s", QSTRING_CSTR(whiteAlgorithm));
WarningIf(( _baudRate_Hz < 2050000 || _baudRate_Hz > 4000000 ), _log, "SPI rate %d outside recommended range (2050000 -> 4000000)", _baudRate_Hz);
const int SPI_FRAME_END_LATCH_BYTES = 3;
_ledBuffer.resize(_ledRGBWCount * SPI_BYTES_PER_COLOUR + SPI_FRAME_END_LATCH_BYTES, 0x00);
isInitOK = true;
}
}
return isInitOK;
}
int LedDeviceSk6812SPI::write(const std::vector<ColorRgb> &ledValues)
{
unsigned spi_ptr = 0;
const int SPI_BYTES_PER_LED = sizeof(ColorRgbw) * SPI_BYTES_PER_COLOUR;
for (const ColorRgb& color : ledValues)
{
RGBW::Rgb_to_Rgbw(color, &_temp_rgbw, _whiteAlgorithm);
uint32_t colorBits =
((uint32_t)_temp_rgbw.red << 24) +
((uint32_t)_temp_rgbw.green << 16) +
((uint32_t)_temp_rgbw.blue << 8) +
_temp_rgbw.white;
for (int j=SPI_BYTES_PER_LED - 1; j>=0; j--)
{
_ledBuffer[spi_ptr+j] = bitpair_to_byte[ colorBits & 0x3 ];
colorBits >>= 2;
}
spi_ptr += SPI_BYTES_PER_LED;
}
_ledBuffer[spi_ptr++] = 0;
_ledBuffer[spi_ptr++] = 0;
_ledBuffer[spi_ptr++] = 0;
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}