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102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
#include <iostream>
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#include "LedDeviceWS281x.h"
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// Constructor
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LedDeviceWS281x::LedDeviceWS281x(const int gpio, const int leds, const uint32_t freq, const int dmanum, const int pwmchannel, const int invert, const int rgbw, const std::string& whiteAlgorithm)
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{
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_whiteAlgorithm = whiteAlgorithm;
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Debug( Logger::getInstance("LedDevice"), "whiteAlgorithm : %s", whiteAlgorithm.c_str());
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initialized = false;
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led_string.freq = freq;
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led_string.dmanum = dmanum;
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if (pwmchannel != 0 && pwmchannel != 1) {
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Error( Logger::getInstance("LedDevice"), "WS281x: invalid PWM channel; must be 0 or 1.");
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throw -1;
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}
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chan = pwmchannel;
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led_string.channel[chan].gpionum = gpio;
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led_string.channel[chan].invert = invert;
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led_string.channel[chan].count = leds;
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led_string.channel[chan].brightness = 255;
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if (rgbw == 1) {
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led_string.channel[chan].strip_type = SK6812_STRIP_GRBW;
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} else {
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led_string.channel[chan].strip_type = WS2811_STRIP_RGB;
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}
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led_string.channel[!chan].gpionum = 0;
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led_string.channel[!chan].invert = invert;
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led_string.channel[!chan].count = 0;
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led_string.channel[!chan].brightness = 0;
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led_string.channel[!chan].strip_type = WS2811_STRIP_RGB;
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if (ws2811_init(&led_string) < 0) {
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Error( Logger::getInstance("LedDevice"), "Unable to initialize ws281x library.");
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throw -1;
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}
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initialized = true;
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}
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// Send new values down the LED chain
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int LedDeviceWS281x::write(const std::vector<ColorRgb> &ledValues)
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{
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if (!initialized)
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return -1;
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int idx = 0;
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for (const ColorRgb& color : ledValues)
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{
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if (idx >= led_string.channel[chan].count)
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break;
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_temp_rgbw.red = color.red;
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_temp_rgbw.green = color.green;
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_temp_rgbw.blue = color.blue;
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_temp_rgbw.white = 0;
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if (led_string.channel[chan].strip_type == SK6812_STRIP_GRBW) {
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Rgb_to_Rgbw(color, &_temp_rgbw, _whiteAlgorithm);
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}
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led_string.channel[chan].leds[idx++] =
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((uint32_t)_temp_rgbw.white << 24) + ((uint32_t)_temp_rgbw.red << 16) + ((uint32_t)_temp_rgbw.green << 8) + _temp_rgbw.blue;
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}
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while (idx < led_string.channel[chan].count)
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led_string.channel[chan].leds[idx++] = 0;
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if (ws2811_render(&led_string))
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return -1;
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return 0;
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}
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// Turn off the LEDs by sending 000000's
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// TODO Allow optional power switch out another gpio, if this code handles it can
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// make it more likely we don't accidentally drive data into an off strip
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int LedDeviceWS281x::switchOff()
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{
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if (!initialized)
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return -1;
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int idx = 0;
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while (idx < led_string.channel[chan].count)
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led_string.channel[chan].leds[idx++] = 0;
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if (ws2811_render(&led_string))
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return -1;
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return 0;
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}
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// Destructor
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LedDeviceWS281x::~LedDeviceWS281x()
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{
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if (initialized)
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{
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ws2811_fini(&led_string);
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}
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initialized = false;
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}
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