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--- zheleznaja_chast:dmx_512_send_dmx_data_arduino [2016/10/07 08:24] – создано Leo
+++ zheleznaja_chast:dmx_512_send_dmx_data_arduino [2025/12/24 02:08] (текущий) – удалено 216.73.216.10
@@ Строка 1: / Строка 1: @@
-====== Отправка DMX 512 данных с помощью Arduino ======
-Еще один простой скетч, использующий Arduino и микросхему MAX485 для отправки данных DMX
-===== Скетч =====
-<file>
-/* DMX Shift Out for arduino - 004 and 005
- * -------------
- *
- * Shifts data in DMX format out to DMX enabled devices
- * it is extremely restrictive in terms of timing. Therefore
- * the program will stop the interrupts when sending data
- *
- * The elektronic foundation for DMX is RS 485, so you have to use
- * a MAX-485 or a 75176.
- *
- * wirring for sending dmx with a MAX-485
-- RO - Receiver Output --- set to ground with a 100 ohm resistor
-- RE - Receiver Output Enable -- set to ground
-- DE - Driver Output Enable -- set to 5v
-- DI - Driver Input -- Input from Arduino
-- GnD - Ground Connection -- set to ground -- refence for the DMX singal --- (DMX pin 1)
-- A - Driver Output / Receiver Input -- DMX Signal (hot)------------------ (DMX pin 3)
-- B - Driver Output / Receiver Input -- DMX Signal inversion ( cold)------ (DMX pin 2)
-- Vcc - Positive Supply -- 4,75V < Vcc < 5,25V
- * Every dmx packet contains 512 bytes of information (for 512 channels).
- * The start of each packet is market by a start byte (shiftDmxOut(sig,0);),
- * you should always send all 512 bytes even if you don*t use all 512 channels.
- * The time between every dmx packet is market by a break
- * between 88us and 1s ( digitalWrite(sig, LOW); delay(10);)
- *
- * (cleft) 2006 by Tomek Ness and D. Cuartielles
- * K3 - School of Arts and Communication
- * fhp - University of Applied Sciences
- * <http://www.arduino.cc>
- * <http://www.mah.se/k3>
- * <http://www.design.fh-potsdam.de>
- *
- * @date: 2006-09-30
- * @idea: Tomek Ness
- * @code: D. Cuartielles and Tomek Ness
- * @acknowledgements: Johny Lowgren for his DMX devices
- *
- */
-int sig = 11; // signal (hot / dmx pin 3)
-int count = 0;
-int swing = 0;
-int updown = 0;
-/* Sends a DMX byte out on a pin. Assumes a 16 MHz clock.
- * Disables interrupts, which will disrupt the millis() function if used
- * too frequently. */
-void shiftDmxOut(int pin, int theByte)
-{
- int theDelay = 1;
- int count = 0;
- int portNumber = port_to_output[digital_pin_to_port[pin].port];
- int pinNumber = digital_pin_to_port[pin].bit;
- // the first thing we do is to write te pin to high
- // it will be the mark between bytes. It may be also
- // high from before
- _SFR_BYTE(_SFR_IO8(portNumber)) |= _BV(pinNumber);
- delayMicroseconds(20);
- // disable interrupts, otherwise the timer 0 overflow interrupt that
- // tracks milliseconds will make us delay longer than we want.
- cli();
- // DMX starts with a start-bit that must always be zero
- _SFR_BYTE(_SFR_IO8(portNumber)) &= ~_BV(pinNumber);
- //we need a delay of 4us (then one bit is transfert)
- // at the arduino just the delay for 1us is precise every thing between 2 and 12 is jsut luke
- // to get excatly 4us we have do delay 1us 4 times
- delayMicroseconds(theDelay);
- delayMicroseconds(theDelay);
- delayMicroseconds(theDelay);
- delayMicroseconds(theDelay);
- for (count = 0; count < 8; count++) {
- if (theByte & 01) {
- _SFR_BYTE(_SFR_IO8(portNumber)) |= _BV(pinNumber);
- }
- else {
- _SFR_BYTE(_SFR_IO8(portNumber)) &= ~_BV(pinNumber);
- }
- delayMicroseconds(theDelay);
- delayMicroseconds(theDelay);
- delayMicroseconds(theDelay);
- delayMicroseconds(theDelay);
- theByte>>=1;
- }
- // the last thing we do is to write the pin to high
- // it will be the mark between bytes. (this break is have to be between 8 us and 1 sec)
- _SFR_BYTE(_SFR_IO8(portNumber)) |= _BV(pinNumber);
- // reenable interrupts.
- sei();
-}
-void setup() {
- pinMode(sig, OUTPUT);
- digitalWrite(13, HIGH);
-}
-void loop() {
- // sending the break (the break can be between 88us and 1sec)
- digitalWrite(sig, LOW);
- delay(10);
- //sending the start byte
- shiftDmxOut(sig,0);
- //sending the 512 bytes for the channels
- shiftDmxOut(sig, 150); //1
- shiftDmxOut(sig, 150); //2
- shiftDmxOut(sig, 150); //3
- shiftDmxOut(sig, 150); //4
- for (count = 1; count<=508; count++){
- shiftDmxOut(sig, 0);
- }
- }
-</file>