IFD:GrundlagenElektronik2011/ArduinoOscilloscope - Revision history

Mschied at 19:48, 12 January 2012

2012-01-12T19:48:58Z

← Older revision		Revision as of 19:48, 12 January 2012
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	#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))		#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
	#define sbi(sfr, bit) (_SFR_BYTE(sfr) \|= _BV(bit))		#define sbi(sfr, bit) (_SFR_BYTE(sfr) \|= _BV(bit))
	#define BAUDRATE 1000000 //~~230400//500000~~		#define BAUDRATE 1000000 // 1000000 may not work - use 115200 instead.

	int testPin = 7;		int testPin = 7;
Line 68:		Line 68:
	void loop()		void loop()
	{		{
	~~// Cycle 15625 KHz = 64uSec~~
	PORTD = PORTD \| 128; // Test Output on pin 7		PORTD = PORTD \| 128; // Test Output on pin 7


	~~//Serial.print(badc0,BYTE); // send signal to computer~~
	~~//UDR0 = badc0; // similar to Serial.print, directly write to register~~
	PORTD = PORTD ^ 128; // Test Output on pin 7		PORTD = PORTD ^ 128; // Test Output on pin 7
	} ~~// loop~~		}

	//******************************************************************		//******************************************************************

Mschied at 12:09, 12 January 2012

2012-01-12T12:09:36Z

← Older revision		Revision as of 12:09, 12 January 2012
Line 1:		Line 1:
			Flash your arduino board with following code to have analog values from analog pin A0 reported via serial connection. Extract the following zip archive to a folder [[Media:pd-arduinoOscilloscope.zip]] and open the contained pd patch arduinoOscilloscope.pd to receive the analog values and have a very basic oscilloscope on your computer.
	Flash your arduino board with following code to have analog values from analog pin A0 reported via serial connection. Extract ~~this~~ zip archive [[~~File~~:pd-arduinoOscilloscope.zip]] and open the contained pd patch arduinoOscilloscope.pd to receive the ~~bytes~~ and have a very basic oscilloscope on your computer.

	<source lang="c">		<source lang="c">

Mschied: Created page with " Flash your arduino board with following code to have analog values from analog pin A0 reported via serial connection. Extract this zip archive [[File:pd-arduinoOscilloscope.zip]..."

2012-01-12T12:03:12Z

Created page with " Flash your arduino board with following code to have analog values from analog pin A0 reported via serial connection. Extract this zip archive [[File:pd-arduinoOscilloscope.zip]..."

New page

Flash your arduino board with following code to have analog values from analog pin A0 reported via serial connection. Extract this zip archive [[File:pd-arduinoOscilloscope.zip]] and open the contained pd patch arduinoOscilloscope.pd to receive the bytes and have a very basic oscilloscope on your computer.

<source lang="c">

/* Arduino fast ADC to Serial connection
* 1 ADC 8-Bit Mode
* analog input 0 is used to sample a signal.
* Martin Schied, Bauhausuniversität Weimar 2012

* adapted from: Arduino Realtime Audio Processing Experiments
* KHM 2008 / Lab3/ Martin Nawrath nawrath@khm.de
* 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))
#define BAUDRATE 1000000 //230400//500000

int testPin = 7;

boolean div32;
// vars altered by interrupt

volatile byte badc0;
volatile byte ibb;

void setup()
{
pinMode(testPin, OUTPUT);
Serial.begin(BAUDRATE); // connect to the serial port
Serial.println("Arduino fast 8 bit ADC");

cbi(ADCSRA, ADPS2);
sbi(ADCSRA, ADPS1);
sbi(ADCSRA, ADPS0);

sbi(ADMUX,ADLAR); // 8-Bit ADC in ADCH Register
sbi(ADMUX,REFS0); // VCC Reference
cbi(ADMUX,REFS1);
cbi(ADMUX,MUX0); // Set Input Multiplexer to Channel 0
cbi(ADMUX,MUX1);
cbi(ADMUX,MUX2);
cbi(ADMUX,MUX3);

//Timer2 PWM Mode set to fast PWM
cbi (TCCR2A, COM2A0);
sbi (TCCR2A, COM2A1);
sbi (TCCR2A, WGM20);
sbi (TCCR2A, WGM21);
cbi (TCCR2B, WGM22);

//Timer2 Clock Prescaler to : 1
sbi (TCCR2B, CS20);
cbi (TCCR2B, CS21);
cbi (TCCR2B, CS22);

//Timer2 PWM Port Enable
sbi(DDRB,3); // set digital pin 11 to output

//cli(); // disable interrupts to avoid distortion
cbi (TIMSK0,TOIE0); // disable Timer0 !!! delay is off now
sbi (TIMSK2,TOIE2); // enable Timer2 Interrupt

} // setup

void loop()
{
// Cycle 15625 KHz = 64uSec
PORTD = PORTD | 128; // Test Output on pin 7

//Serial.print(badc0,BYTE); // send signal to computer
//UDR0 = badc0; // similar to Serial.print, directly write to register
PORTD = PORTD ^ 128; // Test Output on pin 7
} // loop

//******************************************************************
// Timer2 Interrupt Service at 62.5 KHz

ISR(TIMER2_OVF_vect) {

PORTB = PORTB | 1 ;

UDR0=ADCH; // serial transmission.
ibb++; // short delay before start conversion
ibb--;
ibb++;
ibb--;
sbi(ADCSRA,ADSC); // start next conversion
}

</source>

[[Category:Electronics]]
[[Category:Martin Schied]]