hyperion.ng/libsrc/leddevice/LedDeviceP9813.cpp

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#include "LedDeviceP9813.h"
LedDeviceP9813::LedDeviceP9813(const Json::Value &deviceConfig)
: ProviderSpi()
{
_deviceReady = init(deviceConfig);
}
LedDevice* LedDeviceP9813::construct(const Json::Value &deviceConfig)
{
return new LedDeviceP9813(deviceConfig);
}
bool LedDeviceP9813::init(const Json::Value &deviceConfig)
{
ProviderSpi::init(deviceConfig);
_ledBuffer.resize(_ledCount * 4 + 8, 0x00);
return true;
}
int LedDeviceP9813::write(const std::vector<ColorRgb> &ledValues)
{
uint8_t * dataPtr = _ledBuffer.data();
for (const ColorRgb & color : ledValues)
{
*dataPtr++ = calculateChecksum(color);
*dataPtr++ = color.blue;
*dataPtr++ = color.green;
*dataPtr++ = color.red;
}
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}
uint8_t LedDeviceP9813::calculateChecksum(const ColorRgb & color) const
{
uint8_t res = 0;
res |= (uint8_t)0x03 << 6;
res |= (uint8_t)(~(color.blue >> 6) & 0x03) << 4;
res |= (uint8_t)(~(color.green >> 6) & 0x03) << 2;
res |= (uint8_t)(~(color.red >> 6) & 0x03);
return res;
}