Beagle Board - beagleboard.org

Things used in this project

Hardware components:
Sound Card
This allows you go get microphone input and audio output.
×1
Adafruit Standalone Momentary Capacitive Touch Sensor
Used the circuit for this, though this could easily be bought and put on a breadboard if you don't make the PCB.
×5
Adafruit Standalone Toggle Capacitive Touch Sensor Breakout
Repeat from Momentary Sensor: Used the circuit for this, though this could easily be bought and put on a breadboard if you don't make the PCB.
×3
1 kOhm resistors
Only get these if you aren't using the Adafruit buttons.
×8
Buttons/Switches
Only get these if you aren't using the Adafruit buttons.
×8
12002 04
Breadboard (generic)
×1
11026 02
Jumper wires (generic)
×24
Beagleboardblack
BeagleBoard.org BeagleBone Black
×1

Schematics

Schematic
Eagle file for schematic of the board.
sunshineCape.sch
Eagle file for the board. This is where the gerbers come from, which are used to order PCBs.
sunshineCape.brd

Code

Python CodePython
This connects the inputs from the BeagleBone Black's GPIO pins to the Pure Data program. Only run this once the Pure Data file is running on the BeagleBone Black. SAVE THIS AS A .py FILE.
#Poll exported Beagle pins and connect to PureData for transmission on change
#Tyler Worman tsworman@novaslp.net
#7/1/14

#Edited by Team Sunshine
#	Ashish Joshi
#	Sumita Ghosh
#GPIO and ADC handled by Adafruit BB Library

import subprocess
import time
import socket
import Adafruit_BBIO.GPIO as GPIO

lPin44 = 0 #Store value for gpio44
lPin45 = 0 #Store value for gpio45
lPin46 = 0 #Store value for gpio46
lPin47 = 0 #Store value for gpio47
lPin48 = 0 #Store value for gpio48
lPin49 = 0 #Store value for gpio49
lpin50 = 0 #Store value for gpio50
lpin51 = 0 #Store value for gpio51
lpin52 = 0 #Store value for gpio52

#Setup GPIO
GPIO.setup("GPIO1_12", GPIO.IN) #play
GPIO.setup("GPIO1_13", GPIO.IN) #Record
GPIO.setup("GPIO1_14", GPIO.IN) #Clear Loop
GPIO.setup("GPIO1_15", GPIO.IN) #Set Tempo
GPIO.setup("GPIO1_16", GPIO.IN) #Bank
GPIO.setup("GPIO1_17", GPIO.IN) #Key A
GPIO.setup("GPIO1_18", GPIO.IN) #Key B
GPIO.setup("GPIO1_19", GPIO.IN) #Key C
GPIO.setup("GPIO1_20", GPIO.IN) #Key D

#Setup Events
GPIO.add_event_detect("GPIO1_12", GPIO.BOTH) #Play
GPIO.add_event_detect("GPIO1_13", GPIO.BOTH) #Record
GPIO.add_event_detect("GPIO1_14", GPIO.BOTH) #Clear
GPIO.add_event_detect("GPIO1_15", GPIO.BOTH) #Set Tempo
GPIO.add_event_detect("GPIO1_16", GPIO.BOTH) #Bank
GPIO.add_event_detect("GPIO1_17", GPIO.BOTH) #Key A
GPIO.add_event_detect("GPIO1_18", GPIO.BOTH) #Key B
GPIO.add_event_detect("GPIO1_19", GPIO.BOTH) #Key C
GPIO.add_event_detect("GPIO1_20", GPIO.BOTH) #Key D

#Connection to PD
TCP_IP = '127.0.0.1'
TCP_PORT = 13131
BUFFER_SIZE = 1024
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))

def sendChange(name, oldVal, newVal):
	#print "action %s %s %s" %(name,oldVal,newVal)
	if oldVal <> newVal:
		if newVal:
			s.send('%s 1;' %(name))
		else:
			s.send('%s 0;' %(name))

##Main program
#Set initial state
lPin44 = GPIO.input("GPIO1_12")
sendChange('Play', 0, lPin44)
lPin45 = GPIO.input("GPIO1_13")
sendChange('Record', 0, lPin45)
lPin46 = GPIO.input("GPIO1_14")
sendChange('Clear', 0, lPin46)
lPin47 = GPIO.input("GPIO1_15")
sendChange('Timing', 0, lPin47)

lPin48 = GPIO.input("GPIO1_16")
sendChange('Bank', 0, lPin48)
lPin49 = GPIO.input("GPIO1_17")
sendChange('A', 0, lPin49)
lPin50 = GPIO.input("GPIO1_18")
sendChange('B', 0, lPin50)
lPin51 = GPIO.input("GPIO1_19")
sendChange('C', 0, lPin51)
lPin52 = GPIO.input("GPIO1_20")
sendChange('D', 0, lPin52)


#Wait on events
while True:
	#Wait for event to trigger
	if GPIO.event_detected("GPIO1_12"):
		lPinT = GPIO.input("GPIO1_12")
		sendChange('Play', lPin44, lPinT)
		lPin44 = lPinT
	if GPIO.event_detected("GPIO1_13"):
		lPinT = GPIO.input("GPIO1_13")
		sendChange('Record', lPin45, lPinT)
		lPin45 = lPinT
	if GPIO.event_detected("GPIO1_14"):
		lPinT = GPIO.input("GPIO1_14")
		sendChange('Clear', lPin46, lPinT)
		lPin46 = lPinT
    if GPIO.event_detected("GPIO1_15"):                   
		lPinT = GPIO.input("GPIO1_15")
                sendChange('Timing', lPin47, lPinT)
		lPin47 = lPinT

    if GPIO.event_detected("GPIO1_16"):                   
		lPinT = GPIO.input("GPIO1_16")
                sendChange('Bank', lPin48, lPinT)
		lPin48 = lPinT
    if GPIO.event_detected("GPIO1_17"):                   
		lPinT = GPIO.input("GPIO1_17")
                sendChange('A', lPin49, lPinT)
		lPin49 = lPinT
	if GPIO.event_detected("GPIO1_18"):
		lPinT = GPIO.input("GPIO1_18")
				sendChange('B', lPin50, lPinT)
		lPin50 = lPinT
    if GPIO.event_detected("GPIO1_19"):                   
		lPinT = GPIO.input("GPIO1_19")
                sendChange('C', lPin51, lPinT)
		lPin49 = lPinT
	if GPIO.event_detected("GPIO1_20"):
		lPinT = GPIO.input("GPIO1_20")
				sendChange('D', lPin52, lPinT)
		lPin50 = lPinT

##Won't ever get here except if error
s.close()
Pure Data FilePlain text
This is the Pure Data file that contains the composition program and can get inputs from the BeagleBone Black. After this file is opened, run the python file. SAVE THIS AS A .pd FILE.
#N canvas 18 69 1351 677 10;
#X obj 116 121 tgl 25 0 empty empty empty 17 7 0 25 -262144 -1 -1 0
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#X obj 464 331 *;
#X obj 512 327 samplerate~;
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#X obj 314 83 inlet;
#X obj 314 205 realtime;
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#X obj 288 439 sel 0;
#X obj 618 311 > 3000;
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#X obj 126 136 r TAP_finish;
#X msg 288 329 0;
#X obj 288 306 r TAP_finish;
#X text 500 24 A timer gets triggered and reset every time;
#X text 499 38 the inlet receives a bang. If nothing happens;
#X text 498 53 afterwards for 3000 ms \, the "tempo" is considered
;
#X text 498 68 definitive \, and everything gets reset.;
#X text 498 90 comment;
#X text 12 189 Count the number;
#X text 12 201 of bangs received.;
#X text 385 199 Measure the time between;
#X text 385 212 two bangs (making sure that;
#X text 386 223 we only start measuring at;
#X text 386 235 the second bang).;
#X text 358 342 Sum the measured durations...;
#X text 336 403 ... and divide it by the number of bangs-1;
#X text 336 417 to get the average time between 2 bangs.;
#X text 558 490 Pierre Massat \, Guitar Extended \, 2013;
#X text 6 2 "Tap tempo" : we don't measure the tempo;
#X text 5 16 here \, but the duration between 2 beats (bangs).;
#X text 5 30 This is used later to set the length of the loop.;
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#X text 238 67 to be a multiple of the block size.;
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#X text 134 261 Pierre Massat \, Guitar extended \, 2013;
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#X obj 64 436 tabwrite~ bande;
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#X obj 24 22 inlet~;
#X msg 121 85 limit 100;
#X obj 121 21 loadbang;
#X obj 24 60 z~ 64;
#X obj 24 169 *~;
#X obj 24 200 outlet~;
#X obj 121 113 limiter~ 10;
#X connect 0 0 3 0;
#X connect 0 0 6 0;
#X connect 1 0 6 0;
#X connect 2 0 1 0;
#X connect 3 0 4 0;
#X connect 4 0 5 0;
#X connect 6 0 4 1;
#X restore 81 294 pd limiter;
#X obj 611 148 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
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#X obj 486 461 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1
1;
#X text 110 671 Pierre Massat \, Guitar Extended \, 2013;
#X text 568 521 Here we play the table (loop) continuously.;
#X text 315 169 Get the duration between;
#X text 315 181 two beats...;
#X text 316 213 ... divide it by 4 (we;
#X text 316 226 assume that there are 4;
#X text 316 238 beats in a bar)...;
#X text 294 298 ...and compute the length;
#X text 294 312 of the table in samples \, as;
#X text 295 339 block size.;
#X text 295 327 a multiple of the;
#X obj 781 150 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1
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#X obj 80 174 adc~;
#X obj 372 640 dac~;
#X msg 455 441 1;
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#X obj 611 191 del 2;
#X text 752 101 Audio On/Off;
#X text 601 104 Clear;
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#X obj 24 22 inlet~;
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#X obj 24 60 z~ 64;
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#X connect 0 0 3 0;
#X connect 0 0 6 0;
#X connect 1 0 6 0;
#X connect 2 0 1 0;
#X connect 3 0 4 0;
#X connect 4 0 5 0;
#X connect 6 0 4 1;
#X restore 371 616 pd limiter;
#X obj 808 195 switch~;
#X msg 761 359 \; bande const 0 \;;
#X msg 761 287 \; bande resize \$1 \;;
#X obj 372 596 *~;
#X obj 387 575 line~;
#X obj 387 555 pack 0 5;
#X obj 371 506 r~ main_out;
#X obj 387 534 r vol-output;
#X obj 757 236 s vol-output;
#X text 110 685 Modified by Tyler Worman tsworman@novaslp.net for BeagleBone
;
#X obj 231 9 netreceive 13131;
#X obj 146 40 print TCP;
#X floatatom 315 41 5 0 0 0 - - -;
#X text 350 41 Number of Active Connections;
#X floatatom 244 112 5 0 0 0 - - -;
#X floatatom 286 112 5 0 0 0 - - -;
#X floatatom 323 112 5 0 0 0 - - -;
#X floatatom 360 112 5 0 0 0 - - -;
#X obj 139 477 loadbang;
#X msg 127 589 \; pd dsp 1;
#X obj 154 525 delay 200;
#X obj 245 66 route Record Play Timing Clear Bank Key;
#X floatatom 291 146 5 0 0 0 - - -;
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Credits

10922767 10207116320533271 2401583729608949280 n
Sumita Ghosh
0 projects • 8 followers
Berkeley student interning at TI
Contact
Texas tech red raiders
Ashish Joshi
0 projects • 4 followers
Masters Student in Electrical Engineering at Texas Tech University
Contact
Fsu
Jeff Mueller
0 projects • 3 followers
Contact

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