hyperion.ng/libsrc/leddevice/dev_rpi_pwm/LedDeviceWS281x.cpp
2020-08-23 21:02:25 +02:00

141 lines
3.4 KiB
C++

#include "LedDeviceWS281x.h"
LedDeviceWS281x::LedDeviceWS281x(const QJsonObject &deviceConfig)
: LedDevice(deviceConfig)
{
}
LedDeviceWS281x::~LedDeviceWS281x()
{
}
LedDevice* LedDeviceWS281x::construct(const QJsonObject &deviceConfig)
{
return new LedDeviceWS281x(deviceConfig);
}
bool LedDeviceWS281x::init(const QJsonObject &deviceConfig)
{
QString errortext;
bool isInitOK = false;
// Initialise sub-class
if ( LedDevice::init(deviceConfig) )
{
QString whiteAlgorithm = deviceConfig["whiteAlgorithm"].toString("white_off");
_whiteAlgorithm = RGBW::stringToWhiteAlgorithm(whiteAlgorithm);
if (_whiteAlgorithm == RGBW::WhiteAlgorithm::INVALID)
{
errortext = QString ("unknown whiteAlgorithm: %1").arg(whiteAlgorithm);
isInitOK = false;
}
else
{
_channel = deviceConfig["pwmchannel"].toInt(0);
if (_channel != 0 && _channel != 1)
{
errortext = "WS281x: invalid PWM channel; must be 0 or 1.";
isInitOK = false;
}
else
{
memset(&_led_string, 0, sizeof(_led_string));
_led_string.freq = deviceConfig["freq"].toInt(800000UL);
_led_string.dmanum = deviceConfig["dma"].toInt(5);
_led_string.channel[_channel].gpionum = deviceConfig["gpio"].toInt(18);
_led_string.channel[_channel].count = deviceConfig["leds"].toInt(256);
_led_string.channel[_channel].invert = deviceConfig["invert"].toInt(0);
_led_string.channel[_channel].strip_type = (deviceConfig["rgbw"].toBool(false) ? SK6812_STRIP_GRBW : WS2811_STRIP_RGB);
_led_string.channel[_channel].brightness = 255;
_led_string.channel[!_channel].gpionum = 0;
_led_string.channel[!_channel].invert = _led_string.channel[_channel].invert;
_led_string.channel[!_channel].count = 0;
_led_string.channel[!_channel].brightness = 0;
_led_string.channel[!_channel].strip_type = WS2811_STRIP_RGB;
Debug( _log, "ws281x strip type : %d", _led_string.channel[_channel].strip_type );
isInitOK = true;
}
}
}
if ( !isInitOK)
{
this->setInError(errortext);
}
return isInitOK;
}
int LedDeviceWS281x::open()
{
int retval = -1;
_isDeviceReady = false;
// Try to open the LedDevice
ws2811_return_t rc = ws2811_init(&_led_string);
if ( rc != WS2811_SUCCESS )
{
QString errortext = QString ("Failed to open. Error message: %1").arg( ws2811_get_return_t_str(rc) );
this->setInError( errortext );
}
else
{
// Everything is OK, device is ready
_isDeviceReady = true;
retval = 0;
}
return retval;
}
int LedDeviceWS281x::close()
{
int retval = 0;
_isDeviceReady = false;
// LedDevice specific closing activities
if ( isInitialised() )
{
ws2811_fini(&_led_string);
}
return retval;
}
// Send new values down the LED chain
int LedDeviceWS281x::write(const std::vector<ColorRgb> &ledValues)
{
int idx = 0;
for (const ColorRgb& color : ledValues)
{
if (idx >= _led_string.channel[_channel].count)
{
break;
}
_temp_rgbw.red = color.red;
_temp_rgbw.green = color.green;
_temp_rgbw.blue = color.blue;
_temp_rgbw.white = 0;
if (_led_string.channel[_channel].strip_type == SK6812_STRIP_GRBW)
{
Rgb_to_Rgbw(color, &_temp_rgbw, _whiteAlgorithm);
}
_led_string.channel[_channel].leds[idx++] =
((uint32_t)_temp_rgbw.white << 24) + ((uint32_t)_temp_rgbw.red << 16) + ((uint32_t)_temp_rgbw.green << 8) + _temp_rgbw.blue;
}
while (idx < _led_string.channel[_channel].count)
{
_led_string.channel[_channel].leds[idx++] = 0;
}
return ws2811_render(&_led_string) ? -1 : 0;
}