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dmx_receiver_mos_relay_public.ino
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dmx_receiver_mos_relay_public.ino
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/*
- customization 20/09/2012
- ATMEGA32u4
- Board DMX Receiver V2 - TinkerKit
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/eeprom.h>
#include <avr/pgmspace.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define F_OSC 16000000 // Clock frequency
#define BAUD_RATE 250000
#define MOSFET 1
#define RELAY 2
/*
Here you have to select the output mode accordingly to the receiver type you are using.
Choose MOSFET or RELAY for OUTPUT_MODE
*/
//define OUTPUT_MODE RELAY
#define OUTPUT_MODE MOSFET
#define THR 20 //threshold for analogRead
#if OUTPUT_MODE == RELAY
#define PWMpin4 6 // PWM OUT4
#define PWMpin1 10 // PWM OUT1
#define PWMpin2 9 // PWM OUT2
#define PWMpin3 5 // PWM OUT3
#else
#define PWMpin1 6 // PWM OUT1
#define PWMpin4 10 // PWM OUT4
#define PWMpin3 9 // PWM OUT3
#define PWMpin2 5 // PWM OUT2
#endif
#define SW1 8 // DIP1
#define SW2 12 // DIP2
#define SW3 4 // DIP3
#define SW4 11 // DIP4
#define SW5 A0 // DIP5
#define SW6 A1 // DIP6
#define SW7 A2 // DIP7
#define SW8 A3 // DIP8
#define SW9 A4 // DIP9
#define SW10 A5 // DIP10
#define DE 2
#define LED 7
enum {
BREAK, STARTB, STARTADD, DATA};
volatile unsigned int dmxStatus;
volatile unsigned int dmxStartAddress;
volatile unsigned int dmxCount = 0 ;
volatile unsigned int ch1,ch2,ch3,ch4;
volatile unsigned int MASTER;
/*Initialization of USART*/
void init_USART()
{
UBRR1L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1); //Set Baud rate at 250 kbit/s
UBRR1H = (F_CPU/(BAUD_RATE*16L)-1) >> 8; //
UDR1 = 0;
UCSR1A = 0; // clear error flags, disable U2X and MPCM
UCSR1B = (1<<RXCIE1)| (1<<RXEN1) ; // Enable receiver
UCSR1C = (1<<USBS1) | (3<<UCSZ10); // 8bit 2 stop
}
void setup()
{
/*Initialization of INPUT*/
pinMode(SW1,INPUT);
pinMode(SW2,INPUT);
pinMode(SW3,INPUT);
pinMode(SW4,INPUT);
pinMode(SW5,INPUT);
pinMode(SW6,INPUT);
pinMode(SW7,INPUT);
pinMode(SW8,INPUT);
pinMode(SW9,INPUT);
pinMode(SW10,INPUT);
/*Initialization of OUTPUT*/
pinMode(DE,OUTPUT); // enable Tx Rx
pinMode(LED,OUTPUT); // led DMX
/*Setting the pull-up resistors of inputs*/
digitalWrite( SW1,HIGH);
digitalWrite( SW2,HIGH);
digitalWrite( SW3,HIGH);
digitalWrite( SW4,HIGH);
digitalWrite( SW5,HIGH);
digitalWrite( SW6,HIGH);
digitalWrite( SW7,HIGH);
digitalWrite( SW8,HIGH);
digitalWrite( SW9,HIGH);
digitalWrite( SW10,HIGH);
init_USART(); //Call to initialization of USART
}
void loop()
{
/*Declaration of variables*/
volatile unsigned int address1,address2,address3,address4,address5,address6,address7,address8,address9;
/*Calculating address*/
address1 = digitalRead(SW1);
address2 = digitalRead(SW2);
address3 = digitalRead(SW3);
address4 = digitalRead(SW4);
if(address1 == 1)
address1 = 0;
else
address1 = 1;
if(address2 == 1)
address2 = 0;
else
address2 = 1;
if(address3 == 1)
address3 = 0;
else
address3 = 1;
if(address4 == 1)
address4 = 0;
else
address4 = 1;
/*Initialization of addresses 5-6-7-8-9 based on a threshold. The threshold avoid noise*/
if( analogRead(SW5) <= THR)
address5 = 1;
else
address5 = 0;
if( analogRead(SW6) <= THR)
address6 = 1;
else
address6 = 0;
if( analogRead(SW7) <= THR)
address7 = 1;
else
address7 = 0;
if( analogRead(SW8) <= THR)
address8 = 1;
else
address8 = 0;
if( analogRead(SW9) <= THR)
address9 = 1;
else
address9 = 0;
/*Calculation of dmxStartAddress*/
dmxStartAddress = (address1*1) + (address2*2) + (address3*4) + (address4*8) + (address5*16) + (address6*32) + (address7*64) + (address8*128) + (address9*256);
if (dmxStartAddress == 0){ //If all dipswitches are 0
demo(); //call the demo function
}
else if (dmxStartAddress >= 509) //The receiver manages 4 channels, so you can't set a start address above 509;
dmxStartAddress = 509;
digitalWrite(DE,LOW);
sei(); //enable global interrupt
for (;;)
{
// infinite loop, data will be updated throught interrupt
}
}
/*Demo function if dmxStartAddress = 0*/
void demo()
{
int bright;
if (OUTPUT_MODE == MOSFET)
{
for (;;)
{
for (bright = 0; bright < 255; bright++) // infinite loop
{
analogWrite(PWMpin1,bright);
analogWrite(PWMpin2,bright);
analogWrite(PWMpin3,bright);
analogWrite(PWMpin4,bright);
delay(10);
}
for (bright = 255; bright >= 0; bright--) // infinite loop
{
analogWrite(PWMpin1,bright);
analogWrite(PWMpin2,bright);
analogWrite(PWMpin3,bright);
analogWrite(PWMpin4,bright);
delay(10);
}
analogWrite(PWMpin1,255);
analogWrite(PWMpin3,255);
delay(10);
analogWrite(PWMpin1,0);
analogWrite(PWMpin3,0);
analogWrite(PWMpin2,255);
analogWrite(PWMpin4,255);
delay(10);
}
}
else if (OUTPUT_MODE == RELAY)
{
for(;;)
{
analogWrite(PWMpin1,255);
analogWrite(PWMpin2,0);
analogWrite(PWMpin3,0);
analogWrite(PWMpin4,0);
delay(1000);
analogWrite(PWMpin1,0);
analogWrite(PWMpin2,255);
analogWrite(PWMpin3,0);
analogWrite(PWMpin4,0);
delay(1000);
analogWrite(PWMpin1,0);
analogWrite(PWMpin2,0);
analogWrite(PWMpin3,255);
analogWrite(PWMpin4,0);
delay(1000);
analogWrite(PWMpin1,0);
analogWrite(PWMpin2,0);
analogWrite(PWMpin3,0);
analogWrite(PWMpin4,255);
delay(1000);
}
}
}
SIGNAL(USART1_RX_vect)
{
int temp = UCSR1A;
int dmxByte = UDR1;
if (temp&(1<<DOR1)) // Data Overrun?
{
dmxStatus = BREAK; // wait for reset (BREAK)
UCSR1A &= ~(1<<DOR1);
goto tail;
}
if (temp&(1<<FE1)) //BREAK or FramingError?
{
dmxCount = 0; // reset byte counter
dmxStatus = STARTB; // let's think it's a BREAK ;-) ->wait for start byte
UCSR1A &= ~(1<<FE1);
goto tail;
}
switch(dmxStatus)
{
case STARTB:
if (dmxByte == 0) //This is our star byte
{
if (dmxStartAddress==1) dmxStatus = DATA; // the FE WAS a BREAK -> the next byte is our first channel
else dmxStatus = STARTADD; // the FE WAS a BREAK -> wait for the right channel
dmxCount=1;
}
else
{
dmxStatus = BREAK; // wait for reset (BREAK) it was a framing error
}
goto tail;
break;
case STARTADD:
if (dmxCount == dmxStartAddress-1) //Is the next byte channel one?
{
dmxStatus = DATA; //Yes, so let's wait the data
}
dmxCount++;
break;
case DATA: // HERE YOU SHOULD PROCESS THE CHOSEN DMX CHANNELS!!!
if (dmxCount == dmxStartAddress)
{
ch1=dmxByte;
dmxCount++;
}
else if (dmxCount == (dmxStartAddress+1))
{
ch2=dmxByte;
dmxCount++;
}
else if (dmxCount == (dmxStartAddress+2))
{
ch3=dmxByte;
dmxCount++;
}
else if (dmxCount == (dmxStartAddress+3))
{
ch4=dmxByte;
dmxCount=1;
dmxStatus = BREAK; // ALL CHANNELS RECEIVED
if (OUTPUT_MODE == MOSFET) //Mosfet or Relay receiver?
{
analogWrite(PWMpin1,ch1); // update mosfet outputs
analogWrite(PWMpin2,ch2);
analogWrite(PWMpin3,ch3);
analogWrite(PWMpin4,ch4);
}
else if (OUTPUT_MODE == RELAY)
{
if(ch1 > 0)
{
analogWrite(PWMpin1,255); // update relay outputs
}
else
{
analogWrite(PWMpin1,0);
}
if(ch2 > 0)
{
analogWrite(PWMpin2,255);
}
else
{
analogWrite(PWMpin2,0);
}
if(ch3 > 0)
{
analogWrite(PWMpin3,255);
}
else
{
analogWrite(PWMpin3,0);
}
if(ch4 > 0)
{
analogWrite(PWMpin4,255);
}
else
{
analogWrite(PWMpin4,0);
}
}
}
}
tail:
asm("nop");
}