zheleznaja_chast:dmx_512_send_dmx_data_arduino

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zheleznaja_chast:dmx_512_send_dmx_data_arduino [2025/12/23 11:48] – внешнее изменение 127.0.0.1zheleznaja_chast:dmx_512_send_dmx_data_arduino [2025/12/24 02:08] (текущий) – удалено 216.73.216.10
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-====== Отправка DMX 512 данных с помощью Arduino ====== 
-Еще один простой скетч, использующий Arduino и микросхему [[:wiki:electronnie_komponenty:max485|MAX485]] для отправки данных [[:wiki:dmx_512|DMX]]  
-По моему это самый простой скетч, чтобы разобраться как устроен протокол [[:wiki:dmx_512|DMX]] 512. На нем видно все задержки, где и как используется BREAK. 
-===== Скетч ===== 
-<file> 
-/* [[:wiki:dmx_512|DMX]] Shift Out for arduino - 004 and 005 
- * ------------- 
- * 
- * Shifts data in [[:wiki:dmx_512|DMX]] format out to [[:wiki:dmx_512|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 [[:wiki:dmx_512|DMX]] is RS 485, so you have to use 
- * a MAX-485 or a 75176. 
- * 
- * wirring for sending [[:wiki:dmx_512|dmx]] with a MAX-485 
- 1 - RO - Receiver Output --- set to ground with a 100 ohm resistor 
- 2 - RE - Receiver Output Enable -- set to ground 
- 3 - DE - Driver Output Enable -- set to 5v 
- 4 - DI - Driver Input -- Input from Arduino 
- 5 - GnD - Ground Connection -- set to ground -- refence for the [[:wiki:dmx_512|DMX]] singal --- ([[:wiki:dmx_512|DMX]] pin 1) 
- 6 - A - Driver Output / Receiver Input -- [[:wiki:dmx_512|DMX]] Signal (hot)------------------ ([[:wiki:dmx_512|DMX]] pin 3) 
- 7 - B - Driver Output / Receiver Input -- [[:wiki:dmx_512|DMX]] Signal inversion ( cold)------ ([[:wiki:dmx_512|DMX]] pin 2) 
- 8 - Vcc - Positive Supply -- 4,75V < Vcc < 5,25V 
  
- * Every [[:wiki:dmx_512|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 [[:wiki:dmx_512|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 [[:wiki:dmx_512|DMX]] devices 
- * 
- */ 
-int sig = 11; // signal (hot / dmx pin 3) 
-int count = 0; 
-int swing = 0; 
-int updown = 0; 
-/* Sends a [[:wiki:dmx_512|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> 
  • zheleznaja_chast/dmx_512_send_dmx_data_arduino.1766490484.txt.gz
  • Последнее изменение: 2025/12/23 11:48
  • — 127.0.0.1