Difference between revisions of "DMX Arduino"
(Created page with "{{Project |State=Active |Members=Roelke |Description=DMX besturing met een arduino }} Een Shield voor de Arduino waarmee je DMX apparatuur kan besturen. Shield is inmiddels geets...") |
|||
| Line 11: | Line 11: | ||
[[file:Send_sn75276a.jpg]] | [[file:Send_sn75276a.jpg]] | ||
| − | De bijbehorende code : | + | |
| + | |||
| + | {| class="wikitable collapsible collapsed" | ||
| + | ! De bijbehorende code : | ||
| + | |- | ||
| + | |<pre> | ||
/* | /* | ||
| Line 128: | Line 133: | ||
} | } | ||
} | } | ||
| − | + | </pre> | |
| − | + | |} | |
Revision as of 15:34, 2 November 2011
| Project: DMX Arduino | |
|---|---|
| Featured: | |
| State | Active |
| Members | Roelke |
| GitHub | No GitHub project defined. Add your project here. |
| Description | DMX besturing met een arduino |
| Picture | |
| No project picture! Fill in form Picture or Upload a jpeg here | |
Een Shield voor de Arduino waarmee je DMX apparatuur kan besturen. Shield is inmiddels geetst.
Schema :
| De bijbehorende code : |
|---|
/*
* DMX fade for arduino 008
* based on the code of Tomek Ness and D. Cuartielles
*
* adapted to arduino 008 by Peter Szakal and Gabor Papp
* http://nextlab.hu
*/
#include "pins_arduino.h"
int sig = 11; // signal
int value = 0;
int valueadd = 3;
/* 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 port_to_output[] = {
NOT_A_PORT,
NOT_A_PORT,
_SFR_IO_ADDR(PORTB),
_SFR_IO_ADDR(PORTC),
_SFR_IO_ADDR(PORTD)
};
int portNumber = port_to_output[digitalPinToPort(pin)];
int pinMask = digitalPinToBitMask(pin);
// 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)) |= pinMask;
delayMicroseconds(10);
// 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)) &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;= ~pinMask;
// we need a delay of 4us (then one bit is transfered)
// this seems more stable then using delayMicroseconds
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
for (int i = 0; i < 8; i++)
{
if (theByte &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; 01)
{
_SFR_BYTE(_SFR_IO8(portNumber)) |= pinMask;
}
else
{
_SFR_BYTE(_SFR_IO8(portNumber)) &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;= ~pinMask;
}
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
asm("nop\n nop\n nop\n nop\n nop\n nop\n nop\n nop\n");
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)) |= pinMask;
// reenable interrupts.
sei();
}
void setup()
{
pinMode(sig, OUTPUT);
}
void loop()
{
/***** sending the dmx signal *****/
// sending the break (the break can be between 88us and 1sec)
digitalWrite(sig, LOW);
delay(10);
// sending the start byte
shiftDmxOut(sig, 0);
for (int count = 1; count < = 512; count++)
{
shiftDmxOut(sig, value);
}
/***** sending the dmx signal end *****/
value += valueadd;
if ((value == 0) || (value == 255))
{
valueadd *= -1;
}
}
|
