WLED/wled00/dmx.cpp

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#include "wled.h"
/*
* Support for DMX Output via MAX485.
* Change the output pin in src/dependencies/ESPDMX.cpp, if needed (ESP8266)
* Change the output pin in src/dependencies/SparkFunDMX.cpp, if needed (ESP32)
* ESP8266 Library from:
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* https://github.com/Rickgg/ESP-Dmx
* ESP32 Library from:
* https://github.com/sparkfun/SparkFunDMX
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*/
#ifdef WLED_ENABLE_DMX
void handleDMX()
{
// don't act, when in DMX Proxy mode
if (e131ProxyUniverse != 0) return;
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uint8_t brightness = strip.getBrightness();
bool calc_brightness = true;
// check if no shutter channel is set
for (byte i = 0; i < DMXChannels; i++)
{
if (DMXFixtureMap[i] == 5) calc_brightness = false;
}
uint16_t len = strip.getLengthTotal();
for (int i = DMXStartLED; i < len; i++) { // uses the amount of LEDs as fixture count
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uint32_t in = strip.getPixelColor(i); // get the colors for the individual fixtures as suggested by Aircoookie in issue #462
byte w = W(in);
byte r = R(in);
byte g = G(in);
byte b = B(in);
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int DMXFixtureStart = DMXStart + (DMXGap * (i - DMXStartLED));
for (int j = 0; j < DMXChannels; j++) {
int DMXAddr = DMXFixtureStart + j;
switch (DMXFixtureMap[j]) {
case 0: // Set this channel to 0. Good way to tell strobe- and fade-functions to fuck right off.
dmx.write(DMXAddr, 0);
break;
case 1: // Red
dmx.write(DMXAddr, calc_brightness ? (r * brightness) / 255 : r);
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break;
case 2: // Green
dmx.write(DMXAddr, calc_brightness ? (g * brightness) / 255 : g);
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break;
case 3: // Blue
dmx.write(DMXAddr, calc_brightness ? (b * brightness) / 255 : b);
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break;
case 4: // White
dmx.write(DMXAddr, calc_brightness ? (w * brightness) / 255 : w);
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break;
case 5: // Shutter channel. Controls the brightness.
dmx.write(DMXAddr, brightness);
break;
case 6: // Sets this channel to 255. Like 0, but more wholesome.
dmx.write(DMXAddr, 255);
break;
}
}
}
dmx.update(); // update the DMX bus
}
void initDMX() {
#ifdef ESP8266
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dmx.init(512); // initialize with bus length
#else
dmx.initWrite(512); // initialize with bus length
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#endif
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}
#else
void handleDMX() {}
void initDMX() {}
#endif