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reorganizing project to more general synchronizer in preparation for export/delivery to RVK museum.

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foley@ru.is
2013-09-22 16:58:16 +00:00
parent 10423b4755
commit 138877a1ef
33 changed files with 80 additions and 0 deletions
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227
synchronizer/prior-art/Synchronizer_prg1/IR_Get_Code/IR_Get_Code.pde Normal file
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/* IR Remote control
* capture a infrared burst from a remote control and generate code template for reproducing that burst
* measure the infrared carrier frequency / capture ir pulse train (max 200 pulses )
* connect the IR receiver Module (IR_reveiver_schematic.jpg)
* to pin 4,5,6,7
*
*
* KHM 2010 / Martin Nawrath
* Kunsthochschule fuer Medien Koeln
* Academy of Media Arts Cologne
*/
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
//! Macro that clears all Timer/Counter1 interrupt flags.
#define CLEAR_ALL_TIMER1_INT_FLAGS (TIFR1 = TIFR1)
int pinLed = 13; // LED connected to digital pin 13
int pinGND = 4; // Ground for IR reveiver Module
int pinVCC = 5; // +5V for IR reveiver Module
int pinAIN0= 6; // Analog Comparator In 0 / IR reveiver Module
int pinAIN1= 7; // Analog Comparator In 0 / IR reveiver Module
int pinTest = 8;
unsigned int khz;
byte bb;
byte bba;
int cnt;
const int maxlen = 300;
int codelen;
unsigned int timecode[maxlen+5];
void setup()
{
pinMode(pinLed, OUTPUT); // sets the digital pin as output
pinMode(pinTest, OUTPUT);
pinMode(pinGND, OUTPUT);
pinMode(pinVCC, OUTPUT);
pinMode(pinAIN0, INPUT);
pinMode(pinAIN1, INPUT);
digitalWrite(pinVCC,1);
digitalWrite(pinGND,0);
Serial.begin(115200); // connect to the serial port
// hardware counter setup ( refer atmega168.pdf chapter 16-bit counter1)
TCCR1A=0; // reset timer/counter1 control register A
TCCR1B=0; // reset timer/counter1 control register A
TCNT1=0; // counter value = 0
// set timer/counter1 hardware as counter , counts events on pin T1 ( arduino pin 5)
// normal mode, wgm10 .. wgm13 = 0
cbi (TCCR1B ,CS10); // no clock
cbi (TCCR1B ,CS11);
cbi (TCCR1B ,CS12);
// timer2 setup / is used for frequency measurement gatetime generation
// timer 2 presaler set to 256 / timer 2 clock = 16Mhz / 256 = 62500 Hz
cbi (TCCR2B ,CS20);
sbi (TCCR2B ,CS21);
sbi (TCCR2B ,CS22);
//set timer2 to CTC Mode
cbi (TCCR2A ,WGM20);
sbi (TCCR2A ,WGM21);
cbi (TCCR2B ,WGM22);
OCR2A = 124; // CTC at top of OCR2A / timer2 interrupt when coun value reaches OCR2A value
// interrupt control
// sbi (TIMSK2,OCIE2A); // enable Timer2 Interrupt
cbi(ADCSRB,ACME);
cbi(ACSR,ACD);
cbi(ACSR,ACBG);
Serial.println(" Infrared code detector");
while ((ACSR & 32) == 0) {
}
khz=f_measure();
Serial.print(khz);
Serial.print( " KHz");
Serial.println( "");
}
void loop()
{
if (ACSR & 32) { // if IR Signal on pin 5 present
TCCR1B=0; //timer1 off
sbi(TIFR1,TOV1); // clear Timer/Counter 1 overflow flag
TCNT1=0; // clear timer1
TCCR1B=3; //timer1 prescaler =64;
bba=0;
cnt=1;
while ((TIFR1 & 1)==0 ) { // wait for T1 period length 250ms TIFR1 Flag
bb=0;
bb = ACSR & 32; // sample IR Strobe Signal for HIGH/LOW
delayMicroseconds(5);
bb =bb | ACSR & 32;
delayMicroseconds(5);
bb =bb | ACSR & 32;
delayMicroseconds(5);
bb =bb | ACSR & 32;
delayMicroseconds(5);
bb =bb | ACSR & 32;
delayMicroseconds(5);
bb =bb | ACSR & 32;
delayMicroseconds(5);
bb =bb | ACSR & 32;
delayMicroseconds(5);
bb =bb | ACSR & 32;
if (bb != bba) { // if IR strobe level changed
PORTB = PORTB ^ 32; // LED blink
timecode[cnt]=TCNT1; // Store Timecode in Table
codelen=TCNT1;
cnt++; // Count IR Strobes
if (cnt > maxlen) cnt =maxlen-1; // cnt max
delayMicroseconds(200);
}
bba=bb;
}
timecode[cnt]=0;
print_code_template();
for (int ii=1;ii < maxlen;ii++) timecode[ii]=0;
}
}
//******************************************************************
// print a code template according to a pressed button
void print_code_template(){
unsigned int ix,ia,ia1,ia2;
char st1[20];
unsigned long int w1,w2;
Serial.println( "//****************** CODE TEMPLATE FOR IR REMOTE ****************************");
Serial.print( "// IR codelength = ");
Serial.print( codelen*4/1000);
Serial.print( " ms");
Serial.println( "");
Serial.print( "ICR1 = 16000 /") ;
Serial.print(khz);
Serial.println( "; // IR carrier frequency") ;
for (ix=1;ix < maxlen;ix+=2) {
ia=timecode[ix];
ia1=timecode[ix+1];
ia2=timecode[ix+2];
if (ia !=0) {
Serial.print( "sbi(DDRB,1); delayMicroseconds(");
w1=ia1-ia;
w1=w1*4;
sprintf(st1, "%4d );", w1);
Serial.print( st1);
timecode[ix]=0;
}
if (ia2 !=0) {
w2=ia2-ia1;
w2=w2*4;
Serial.print( " cbi(DDRB,1); delayMicroseconds(" );
sprintf(st1, "%4d );", w2);
Serial.print( st1);
timecode[ix]=0;
timecode[ix+1]=0;
Serial.print( " // ");
sprintf(st1, "ix:%3d", ix);
Serial.print( st1);
sprintf(st1, " ton:%4d", w1);
Serial.print( st1);
sprintf(st1, " toff:%4d", w2);
Serial.print( st1);
Serial.println("");
}
}
Serial.print( " cbi(DDRB,1);" );
Serial.println("");
Serial.println("");
Serial.println("");
}
//******************************************************************
// measure infrared carrier frequency at pin 6,7 / analog comparator
unsigned int f_measure() {
TCCR1B=0; //timer1 off
sbi(TIFR1,TOV1); // clear Timer/Counter 1 overflow flag
TCNT1=0; // clear timer1
TCCR1B=3; //timer1 prescaler =64;
int cnt=0;
byte bb,bba;
while (TCNT1 < 250) {
bb=ACSR;
if (bb != bba) {
cnt++;
// PORTB ^= 32;
}
bba=bb;
}
cnt=cnt/2;
return (cnt);
}