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46  Using Arduino / Project Guidance / Re: Servo control on: February 12, 2013, 06:16:32 am
power will also be provided to the second arduino.
47  Using Arduino / Project Guidance / Servo control on: February 12, 2013, 06:13:36 am
Can I use the serial value from a processing app to change an analog PIN's value of arduino  with Serial.read() & analoWrite() & connect that analog pin to another arduino's Same/Another Analog PIN. Then use the analogRead() in the 2nd arduino to read the value coming over that PIN & set  position of a servo according to the value. Can it be done? I can use an ATtiny in that case to drive the servo separate. This way it won't have to be dependent on the RADAR-ARDUINO's timers. there's a reason I want to do that

http://arduino.cc/forum/index.php?topic=147742.new;topicseen#new.

When I tried this( sketches below), it didn't work.No motion in servo.

-------------------ARDUINO CODE----------------------
Arduino 1 code:

void setup()
{
  Serial.begin(9600);
}


void loop()
{
  while(Serial.available() == 0);
  {
    int pos = Serial.read() - '0';
    analogWrite(A0, pos);
    Serial.flush();
  }
}

--------------------------------------------------------------------------------------------
Arduino 2 code:

#include <Servo.h>

Servo myservo;

void setup()
{
  myservo.attach(9);
  Serial.begin(9600);
}


void loop()
{
  int data = analogRead(A0);
  Serial.println(data);
  myservo.write(data);
  //Servo.flush();
}

------------------------PROCESSING APPLET-------------------

code:

import processing.serial.*;
import controlP5.*;

Serial port;
ControlP5 cp5;

int tilt = 0;

void setup()
{
size(200, 200);

port = new Serial(this, "COM14", 9600);
//port.bufferUntil('\n');

cp5 = new ControlP5(this);

cp5.addSlider("tilt")
     .setPosition(88,7)
     .setSize(20,180)
     .setRange(0,180)
     .setValue(90)
     ;
}

void draw()
  {
    background(0);
    println(tilt);
    port.write(tilt);
  }

48  Using Arduino / Programming Questions / Re: Serial communication querry on: February 12, 2013, 05:07:40 am
 If can I use the tilt value from the processing app to change set an analog PIN of arduino  with analoWrite() for  the corresponding tilt value coming over serial & connect that analog pin to another arduino's Same/Another Analog PIN. Then use the analogRead() to read the value coming over that PIN & set  position of servo according to the value. Can it be done. I can use an ATtiny in that case to drive the servo separate. This way it won't have to be dependent on the RADAR-ARDUINO's timers.
 
49  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 02:45:19 pm
Thanks peter for the info. But can you follow that up by putting it & testing it a little bit in the first pair of sketches I sent? I would be a great help for me? Thanks in adv.
50  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:59:48 pm
In my code timer one's counting & timer three's interrupting. 
51  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:58:19 pm
Tried all the PWM pins & few analog pins. Didn't work. when I checked the servo.cpp, I found none of the AVR family use timer 2 . they use timer 1 & 3 only. then where's this coming from?
52  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:46:34 pm
only one servo is to be controlled. As suggested I should check & change the pins as it might be using timer 2. timer 3 pins with PWM or ADC could be assigned. But where to check this thing in servo lib?
53  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:27:08 pm
And I don't have any extra port here as I'm using UNO R3. would it work if I use two different ports for servo & RAdar.Would it help me if I go for a mega?
54  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:25:03 pm
So how this shall be solved? Is there any way? Sorry but, I'm needing a solution here as I'm not much of into hardcore micro-controller stuffs.
And the parseInt link that's been forwarded to me, doesn't have any example code.
55  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:22:39 pm
comments are comments right? those are meant to check the speed results in the serial monitor.  
Now I'm just porting the frequency data to the port from the arduino & TRYING TO ACCEPept slider value from the port to the arduino.
I'm not that much High end with timers though. I explained my aim also that why i need those timer interrupts as then the radar won't work.
56  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:15:45 pm
It may be due to the timers or the bi directional communication. I tried to drive the servo from an simple UI of just slider & it worked.

--------------arduino code------------

#include <Servo.h>

Servo myservo;

void setup()
{
  myservo.attach(9);
  Serial.begin(115200);
}


void loop()
{
  while(Serial.available() == 0);
  {
  int pos = Serial.read() - '0';
  myservo.write(pos);
  Serial.flush();
  }
  }

------------processing code-------------

import processing.serial.*;
import controlP5.*;

Serial port;
ControlP5 cp5;

int tilt = 0;

void setup()
{
size(500, 500);

port = new Serial(this, "COM14", 115200);
//port.bufferUntil('\n');

cp5 = new ControlP5(this);
cp5.addSlider("tilt")
     .setPosition(320, 0)
     .setSize(20,240)
     .setRange(0,180)
     .setValue(90)
     ;
}

void draw()
  {
    background(0);
    port.write(tilt);
  }

.
57  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 01:01:38 pm
So is there any solution here? smiley-sad
58  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 12:59:26 pm
this is the code:
----------------new sketch-----------------

#include <Servo.h>

Servo myservo;

const uint16_t TICK_CNT = 3; // 255-(16MHz/1024/62Hz) 
static uint16_t freq = 0;
double sped = 0; //"speed" seems to be a reserved term


void setup()
{
  myservo.attach(9);
  pinMode(13, OUTPUT);
  digitalWrite(13, HIGH);
 
  Serial.begin(115200);

  noInterrupts();                     // disable all interrupts while we configure 
  // init Timer1 - 16-bit timer/counter
  TCNT1   = 0;                                  // start count at zero.       
  TCCR1B  |= _BV(CS12) | _BV(CS11) | _BV(CS10); // Increment T1 input on each positive edge
                                                // using an external source. Table 16-5, pg 139.
 
  // init Timer2 - 8-bit timer/counter
  TCNT2   = TICK_CNT;                 // preload Timer2 to interrupt every 250 msec
  TIMSK2  = _BV(TOIE2);               // enable the Timer2 overflow interrupt
  TCCR2B  |= _BV(CS22) |_BV(CS21) | _BV(CS20);   // init clock prescaler to 1024. Table 18-9, page 164.
  interrupts();                       // enable all interrupts
 
  //Serial.println("Ready...");
}

ISR(TIMER1_OVF_vect) {
  // do nothing. this is just a dummy ISR in case it actually overflows.
  //Serial.println("Inside Timer1 Overflow Interrupt.");
}

ISR(TIMER2_OVF_vect) {
  //Serial.print("TCNT1: ");
  //Serial.println(TCNT1);
  freq = TCNT1;
  //Serial.println(freq);
  TCNT1 = 0;
  TCNT2 = TICK_CNT;
}

void loop()
{
  while(Serial.available() == 0);
  {
  int pos = Serial.read() - '0';
  myservo.write(pos);
  Serial.flush();
  }

  if (freq != 0)
  {
      freq = freq * 62;      // multiple the frequency * 4 (using leftshift 2 places). 250ms*4 = 1 sec.
      //sped = freq * .03225;  // multiplying freq * 0.03225 will give speed in mph. 31Hz == 1 mph.
                             // see: http://www.microwave-solutions.com/contents/en-uk/d13_System_Design.html
     // Serial.print("Freq: ");
      Serial.println(freq, DEC);
      //Serial.print(" Hz, Speed: ");
      //Serial.print(sped, 0);
      //Serial.println(" mph");
      freq = 0;
  }
}
59  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 12:54:31 pm
surely I even tried to do it by simply servo.write(the serial value).
it didn't work.
60  Using Arduino / Programming Questions / Re: Serial communication querry on: February 11, 2013, 12:52:34 pm
i'm sorry for that.
Servo's not responding. even though when I ran an exemplary  "sweep" code just to check whether the servo's ok or not, it worked just fine.
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