mirror of
https://github.com/hyperion-project/hyperion.ng.git
synced 2023-10-10 13:36:59 +02:00
89 lines
1.8 KiB
C++
89 lines
1.8 KiB
C++
|
|
// Local Hyperion-Leddevice includes
|
|
#include "LedDeviceWs2812b.h"
|
|
|
|
LedDeviceWs2812b::LedDeviceWs2812b() :
|
|
LedRs232Device("/dev/ttyAMA0", 4000000)
|
|
{
|
|
fillTable();
|
|
}
|
|
|
|
int LedDeviceWs2812b::write(const std::vector<ColorRgb> & ledValues)
|
|
{
|
|
// Ensure the size of the led-buffer
|
|
if (_ledBuffer.size() != ledValues.size()*3)
|
|
{
|
|
_ledBuffer.resize(ledValues.size()*3);
|
|
}
|
|
|
|
// Translate the channel of each color to a signal
|
|
auto bufIt = _ledBuffer.begin();
|
|
for (const ColorRgb& color : ledValues)
|
|
{
|
|
*bufIt++ = _byte2signalTable[color.red];
|
|
*bufIt++ = _byte2signalTable[color.green];
|
|
*bufIt++ = _byte2signalTable[color.blue];
|
|
}
|
|
|
|
return writeBytes(_ledBuffer.size()*sizeof(ByteSignal), reinterpret_cast<uint8_t *>(_ledBuffer.data()));
|
|
}
|
|
|
|
int LedDeviceWs2812b::switchOff()
|
|
{
|
|
// Set all bytes in the signal buffer to zero
|
|
for (ByteSignal & signal : _ledBuffer)
|
|
{
|
|
signal = _byte2signalTable[0];
|
|
}
|
|
|
|
return writeBytes(_ledBuffer.size()*sizeof(ByteSignal), reinterpret_cast<uint8_t *>(_ledBuffer.data()));
|
|
}
|
|
|
|
void LedDeviceWs2812b::fillTable()
|
|
{
|
|
_byte2signalTable.clear();
|
|
for (int byte=0; byte<256; ++byte)
|
|
{
|
|
const ByteSignal signal = byte2Signal(uint8_t(byte));
|
|
_byte2signalTable.push_back(signal);
|
|
}
|
|
}
|
|
|
|
LedDeviceWs2812b::ByteSignal LedDeviceWs2812b::byte2Signal(const uint8_t byte) const
|
|
{
|
|
ByteSignal result;
|
|
result.bit_12 = bits2Signal(byte & 0x80, byte & 0x40);
|
|
result.bit_34 = bits2Signal(byte & 0x20, byte & 0x10);
|
|
result.bit_56 = bits2Signal(byte & 0x08, byte & 0x04);
|
|
result.bit_78 = bits2Signal(byte & 0x02, byte & 0x01);
|
|
return result;
|
|
}
|
|
|
|
uint8_t LedDeviceWs2812b::bits2Signal(const bool bit1, const bool bit2) const
|
|
{
|
|
if (bit1)
|
|
{
|
|
if (bit2)
|
|
{
|
|
return 0x8C;
|
|
}
|
|
else
|
|
{
|
|
return 0xCC;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (bit2)
|
|
{
|
|
return 0x8E;
|
|
}
|
|
else
|
|
{
|
|
return 0xCE;
|
|
}
|
|
}
|
|
|
|
return 0x00;
|
|
}
|