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@premek

premek/dmx.ino

Created Jan 22, 2019
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DMX USB, FastLED RGB LED stripe, OP-Z
#include <SoftwareSerial.h>
#include "DMXUSB.h"
#include <FastLED.h>
SoftwareSerial mySerial(10, 11); // RX, TX
#define LED_PIN LED_BUILTIN
#define DMXUSB_BAUDRATE 115200
#define NUM_LEDS 16
#define DATA_PIN 3
CRGB leds[NUM_LEDS];
void myDMXCallback(int universe, char buffer[512]) {
// Serial.println("msg");
// Serial.println(universe);
digitalWrite(LED_PIN, LOW);
leds[0] = CRGB::Black;
for (int index = 0; index < 512; index++) {
int value = buffer[index]; // DMX value 0 to 255
if (value != 0) {
// Serial.print(index);
// Serial.print("=");
// Serial.println(value);
}
int LEDchannel = index; // Find the LED number; can't fit a 3-channel fixture on the remaining two channels
if (LEDchannel <= (NUM_LEDS * 3) - 1) { // If DMX channel (LEDchannel starts at 0) is in range of LEDs (3 channels per LED for RGB)
int colorChannel = LEDchannel % 3; // Find the color channel of the LED addressed
int ledID = (LEDchannel - colorChannel) / 3; // Find the FastLED index of the LED addressed
if (colorChannel == 2) leds[ledID].r = value / 30; // If the channel is red, write the red value of the LED
if (colorChannel == 1) leds[ledID].g = value / 30; // If the channel is green, write the red value of the LED
if (colorChannel == 0) leds[ledID].b = value / 30; // If the channel is blue, write the blue value of the LED
}
if (universe == 0 && index < 3 && value != 0) {
digitalWrite(LED_PIN, HIGH);
}
}
FastLED.show(); // Display the frame after processing all channels
}
DMXUSB myDMXUsb(mySerial, DMXUSB_BAUDRATE, 0, myDMXCallback);
void setup() {
//Serial.begin(115200);
mySerial.begin(DMXUSB_BAUDRATE);
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS); // todo wrong colors?
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH); delay(100); digitalWrite(LED_PIN, LOW); delay(100);
digitalWrite(LED_PIN, HIGH); delay(100); digitalWrite(LED_PIN, LOW); delay(100);
leds[0] = CRGB::Red; FastLED.show(); delay(100); leds[0] = CRGB::Black; FastLED.show();
}
void loop() {
myDMXUsb.listen();
}
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