Ping Pong - The Remix

Posted on November 10, 2005 at 04:21 PM by sj695

Our idea is to re-create the ping pong application, and make it wireless this time. As we all know it’s always hard to jump around like an acrobat playing ping pongs with long tangled wires attached to the paddles. So this is our solution, going WIRELESS!!

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PComp Assignment 6

Posted on October 20, 2005 at 11:22 PM by sj695

Bought my motor have not completed this lab because I haven't been able to find a H-Bridge.

PComp Assignment 5

Posted on October 13, 2005 at 11:17 PM by sj695

This week we are sending and recieving data to Processing via the serial port. In this lab i moved a circle around the screen with a potentiometer. Here's the code:

-- Processing CODE --

/* Serial call-and-response
by Tom Igoe (with adjustments by Dano)

Sends a byte out the serial port, and reads 3 bytes in.
Sets foreground color, xpos, and ypos of a circle onstage
using the values returned from the serial port

Updated October 12, 2004
*/

import processing.serial.*;

Serial myPort; // The serial port

int redNess = 255; // fill color
int[] serialStuff= new int[3];; //where we keep all the incoming stuff
int serialCount = 0; // a count of how many bytes we receive
int xpos= width/2;; // Starting position of the ball
int shape =65;

void setup() {
size(255, 255); // stage size
noStroke(); // no border on the next thing drawn
myPort = new Serial(this, Serial.list()[0], 9600);
serialWrite(65); // send a capital A to start the MC sending
}

void draw() {
background(0);
fill(redNess,0,0);
// Draw the shape
if (shape==65){ //switch value is 65 or 66 (I added 65 to the normal values 0 and 1)
ellipse(xpos, 100, 50, 50);
}else{
rect(xpos,100,50,50);
}
}

void serialEvent() { //this function gets called when something happens involving the serial port

//serial is a special variable provided by processing to give you the oldest byte waiting to be read
// add the latest byte from the serial port into the correct slot in your byte array
serialStuff[serialCount] = myPort.read();
serialCount++;

// if we have 3 bytes, parse the string:
if (serialCount> 2 ) {
redNess = 2* serialStuff[0];
xpos = serialStuff[1];
shape = serialStuff[2];

// after you got them all, go back to putting the bytes in the first slot in the array again
serialCount = 0;
// get a number between 0 to 255 for the mouseX
//if your stage is bigger than 255 //int mouseXIn0to255 = 255*mouseX/width
//send out the mouseX to postion the servo motor
myPort.write(mouseX);
}
}

-- PIC BASIC CODE --

DEFINE OSC 4

DEFINE ADC_BITS 8
DEFINE ADC_CLOCK 3
DEFINE ADC_SAMPLEuS 20

lightVar var byte
potVaR VAR BYTE
switchVar var byte
inByte var byte

input portb.7

main:
switchVar = portb.7 + 65 //make it readable
adcin 0, potvar
adcin 2, lightvar
serout2 portc.6, 16468, [lightVar,potVar,switchVar]
serin2 portc.7, 16468, [inbyte]
Pulsout portd.0, inByte
PAUSE 10

goto main

PComp Assignment 4

Posted on October 06, 2005 at 10:55 PM by sj695

It's amazing how much we're learning in PComp. We're in week 4 and programing a computer chip to control a servo. So this week we're programming a pic chip to control a servo with a potentiometer. Each week I feel like a painter learning how to create more colors. Here's the code:

DEFINE OSC 4
start:

INCLUDE "modedefs.bas"

' Define ADCIN parameters

' Set number of bits in result
DEFINE ADC_BITS 10

' Set clock source (3=rc)
DEFINE ADC_CLOCK 3

' Set sampling time in microseconds
DEFINE ADC_SAMPLEUS 10

' Set PORTA to all input
TRISA = %11111111

' Set up ADCON1 analog and right justify the result
adcon1 = %10000010

'define adc vars
adcVar0 VAR WORD 'Create variable to store result

'set a var for the pulsewidth- this tells the motor where to go
pulseWidth var byte

'thes values can be vary with different motors
minPulse CON 75
maxPulse CON 250
refreshPeriod CON 20

main:

'read adc data
ADCIN 0, adcVar0

'message the numbers so the value from the potentiometer matches the max and min of the servo
adcVar0 = (adcVar0/4) + 75

if adcVar0 >= 250 then
adcVar0 = 250
else
adcVar0= adcVar0
endif

'assign pulseWidth to the position of the potentiometer
pulseWidth = adcVar0

'set the pin low
low PORTC.3

'pulse the pin
PulsOut PORTC.3, pulseWidth

'pause
pause refreshPeriod
GOTO main

PComp Assignment 3

Posted on September 29, 2005 at 10:38 PM by sj695

For this week's assignment we are to communicate with a computer with our pic chip via the serial port. In the last week's lab I used a potentiometer instead of a switch to turn on the led, so this weeks lab was quite simple requiring nothing more than code midification. I must say it was quite amazing to see those numbers run down the screen in hyperterminal.

Here is the code I used:

' PicBasic Pro program to display result of
' 10-bit A/D conversion through serial at 9600 baud
'
' Connect analog input to channel-0 (RA0)

' Define ADCIN parameters
DEFINE ADC_BITS 10 ' Set number of bits in result
DEFINE ADC_CLOCK 3 ' Set clock source (3=rc)
DEFINE ADC_SAMPLEUS 50 ' Set sampling time in uS

ADCvar VAR WORD ' Create variable to store result

TRISA = %11111111 ' Set PORTA to all input
ADCON1 = %10000010 ' Set PORTA analog and right justify result
Pause 500 ' Wait .5 second

main:
ADCIN 0, ADCvar ' Read channel 0 to adval
serout2 PORTC.6, 16468, [DEC ADCvar, 13, 10] ' print it to serial out,
' with linefeed and carriage return (10, 13)
GoTo main ' Do it forever

OBSERVATIONS PROJECT

Posted on September 28, 2005 at 06:56 PM by sj695

Have sensors built into the doors that will measure sound.

OBSERVATIONS PROJECT

Posted on September 28, 2005 at 06:55 PM by sj695

Gives people personal space.

OBSERVATIONS PROJECT

Posted on September 28, 2005 at 06:54 PM by sj695

Used for shared/couple sitting

PComp Assignment 2

Posted on September 22, 2005 at 05:19 PM by sj695

For our second Physical Computing lab assignment we had to program a pic chip using a version of Basic.

Day 1
Last night I was able to get a LED to blink by writing the following code:

'Define the clock speed
DEFINE OSC 4

'These are the ports i'm working with
OUTPUT portb.1 '34 Pin Number
OUTPUT portb.4 '37 Pin Number
OUTPUT portb.7 '40 Pin Number

'Start Main Function
main:

    ' Turn on Port 1
    HIGH portb.1

    ' Leave on for half a second
    PAUSE 500

    'Turn off Port 1
    LOW portb.1

    'Turn off for half a second
    PAUSE 500

    ' Go back and repeat
goto main

Seems simple, but the most difficult portion of the Lab was setting up the bread board. After receiving help from other students in the lab I had the board setup in 2 hours of course I also had to solder and wire my switch (I didn't use a switch in assignment 1). The programming took about 15 minutes.

Day 2
Today I disassembled my board to make sure i knew what was going on and to aslo add and program my switch. Reassembling my board was really helpful and I feel like I have a much clearer idea of what's going on. Here is the code I used to turn the LED on and off with the switch:

input portb.0
output portd.1

main:
    if portb.0 = 1 then ' if the switch is closed on pin RB0
        low portd.1 ' set pin RD1 low
    else
        high portd.1 ' set RD1 high
    endif
goto main

I also added a potentiometer to fad the LED when the switch was on, I was going to attempt to start next weeks lab but decided to wait.

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First PCOMP Entry

Posted on September 12, 2005 at 07:10 PM by sj695

This is my first Physical Computing Entry, not much here now check back later.