kalshagar - arduino and a nintendo ds touch screen.pdf

Wiki Home Recent Changes Pages and Files Members

Search

Quick Navigaon

All projects

Hardware

Links

Top projects

Game boy projects

Alan numitron clock

Clapclap 2313/1386

Smokey amp

Laser cuer

WordClock

ardReveil v3

SNES Arcade cabinet

cameleon

Home Presence Detector

Contact me

Who's Alan?

Favorites

Hackaday

ATmel blogAkizukidenshi Eleclab

EEVblog

Switchscience

Sparkfun

Suzusho Datasheet LibErmicroSkyduino (fr)Marutsu

Tag cloud

atmega328

Arduino and a Nintendo DS touch screen(/Arduino+and+a+Nintendo+DS+touch+screen)

Put 470 ohm : the read values are [0..200] and you don't read a square but a triangle : one angle is in

the middle of the hypothenus of the others, you have to do calibraon/transformaon matrix or

barycenters ... it's high school maths for the later, but not fun. Small resistor value = bad idea

Put 10k Ohm : you get a nice, square reading, values [0 .. 800]. No calibraon or post calculaon

needed. 10k+ resistor value = good idea

With thin scisors, cut the screen connector to separate the 4 lile tracks to connect

Drop a lile solder on each. Beware of short cuts and don't burn it (even if it's kapton ) : be swi.

Prepare a 4 wire map (at cable) by presoldering each wire

The real hard part: wire per wire, make the contact between the connector track and the wire, heat up

to have the solder to melt and make contact, and don't move (makes bad solder)

If you're at that point, you're not too bad, kind of coldhanded guy ^^ So insert a piece of paper

between the soldered wires (very close, might shortcut) and maybe hot glue it or wrap it with tape.

TADA! It's done. Goo news is that the wire order is the same as with the connector.

ces.com/site/signin?goto=https%3A%2F%2Fkalshagar.wikispaces.com%2FArduino%2Band%2Ba%2BNintendo%2BDS%2Btouch%2Bscreen%3FresponseToken%3Dfe8098b7c2709582bda95292239c7612)

2 (/Arduino+and+a+Nintendo+DS+touch+screen#discussion)

26 (/page/history/Arduino+and+a+Nintendo+DS+touch+screen)

(/page/menu/Arduino+and+a+Nintendo+DS+touch+screen)

See my other Gameboy related pagesSee my clocks projects : with

voltmeter, with RGB dot matrix, with

VFD tubes, ...

Realisaon

Quite easy to do, with inexpensive components (Touch screen

is 10$, break board connector 4$ and just buy it, don't be a

hero), but with one or two caveats.

Sample, wiring and code here under. Everything is basically an

applicaon of Elmchan's very good tutorial hp://kousaku

kousaku.blogspot.com/2008/08/arduino_24.html (but not in

Japanese).

You might be interrested in a project I did that uses it, it's

the ardReveil. I divided the touchpad in 4 zones in/out/+/

and used it as an input and it was quite successful. Project

had other problems but at least this was really ok.

Caveats and what you should know

Buy the breakboard it make your life easier. You can solder directly to the connector, I did it (see below), but I

don't recommend it seeing the raon complexity/benet. Just spend 4 bucks.

Touchscreen has 2 sides and only one is sensive. Can seem obvious when you know, but I didn't at rst...

Don't forget the pulldown resistors. Otherwise you have oang results and can't get anything meaningful as a

result. Depending on the resistors you will put, you will have dierent results:

There's no limit on how fast you can read as per my tests, knock yourself out!

Answering some people quesons : it takes 5v at least in the present implementaon (arduino runs on 5v).

With the big pulldown (10kOhm), the pulldown intensity is very low, like 0.5 mA, a trie.

Use the breakboard for the connector if possible. Indeed, my rst touch screen t perfectly and was well bound

to it, but ... the 2 recent ones I bought (obviously dierent models, with greenish border) even though look

exactly the same, they didn't t in the connector ! It looked like ok, but contact was not done and it was loose,

the screen going out of the connector as if it was not blocked at all... then comes the me for real solder

soldier:

Pictures

kalshagar - Arduino and a Nintendo DS touch screen https://kalshagar.wikispaces.com/Arduino+and+a+Nintendo+DS+touch...

1 of 5 02-Apr-15 3:25 PM

Too many people use this, too few put a diagram. I suck a electronic, so I put a graph.

One important word : 4x 10kOhm can't be replaced with just one, don't waste me trying.

With the 10 kOhm resistors, nice reading, no recalibraon : raw results drawn on a 800x800 picture. Life is great.

BEWARE: this pin assignement is according the code here under. If you have other assignement, just change the

constants in the header of the Arduino code.



2 of 5 02-Apr-15 3:25 PM

Arduino 2009 + 4x 10 kOhm + Connector + DS touch screen. You can do that within 1 hour for sure...

Links

Shopping

Screen (Sparkfun for US, SwitchScience for the japanese) hp://www.sparkfun.com/commerce

/product_info.php?products_id=8977 hp://www.switchscience.com/products

/detail.php?product_id=105

Connector (don't be a hero, spend 4$) hps://www.sparkfun.com/commerce

/product_info.php?products_id=9170 hp://www.switchscience.com/products

/detail.php?product_id=178

Documentaon and tutorials

Sparkfun's tutorial hp://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=139

Reading values

WORKING Same as the link here under BUT in Japanese BUT with a schema ! hp://kousaku

kousaku.blogspot.com/2008/08/arduino_24.html

Not working a RGB mixer with a DS touchscreen ... wait a minute, that's EXACLTY what I planned !

hp://www.arduino.cc/cgibin/yabb2/YaBB.pl?num=1243499684

Calibraon (no need with 10kOhm pull down)

hp://www.embedded.com/story/OEG20020529S0046

EEIOL_2002JUN02_EMS_OPTO_TA.pdfDetails Download 154 KB

taken from hp://www.eendia.co.in

/ART_8800503899_1800010_TA_1f833eab.HTM

Code

Download code here

DSTouchScreen_Test2.pdeDetails Download 1 KB

// Taken from http://kousaku-kousaku.blogspot.com/2008/08/arduino_24.html/*#define xLow 14#define xHigh 15#define yLow 16#define yHigh 17*///modified to match my sparkfun connector#define xLow 17#define xHigh 15#define yLow 16#define yHigh 14



3 of 5 02-Apr-15 3:25 PM

(https://www.wikispaces.com/user/view/grokCore)

You have to go check out for touchscreens!dealextreme[dor]com/details.dx/sku.32592.60!!Seriously.I'll be using this for sure. Just got myArduino 2009 for XMass and my brain isoozing with ideas.

Hey, this is awesome!grokCore (https://www.wikispaces.com/user/view/grokCore) Dec 30, 2010

(https://www.wikispaces.com/user/view/shatterz)

void setup(){ Serial.begin(9600);} void loop(){ pinMode(xLow,OUTPUT); pinMode(xHigh,OUTPUT); digitalWrite(xLow,LOW); digitalWrite(xHigh,HIGH); digitalWrite(yLow,LOW); digitalWrite(yHigh,LOW); pinMode(yLow,INPUT); pinMode(yHigh,INPUT); delay(10); //xLow has analog port -14 !! int x=analogRead(yLow -14); pinMode(yLow,OUTPUT); pinMode(yHigh,OUTPUT); digitalWrite(yLow,LOW); digitalWrite(yHigh,HIGH); digitalWrite(xLow,LOW); digitalWrite(xHigh,LOW); pinMode(xLow,INPUT); pinMode(xHigh,INPUT); delay(10); //xLow has analog port -14 !! int y=analogRead(xLow - 14); Serial.print(x,DEC); Serial.print(","); Serial.println(y,DEC); delay(200);}



4 of 5 02-Apr-15 3:25 PM

Help About Blog Pricing Privacy Terms Support UpgradeContributions to https://kalshagar.wikispaces.com/ are licensed under a GNU Free Documentation License.

Portions not contributed by visitors are Copyright 2015 Tangient LLC

Built something awesome thanks to this starting me off. Maybe you can link it :)ces.com/site/signin?goto=https%3A%2F%2Fkalshagar.wikispaces.com%2FArduino%2Band%2Ba%2BNintendo%2BDS%2Btouch%2Bscreen%3FresponseToken%3Dfe8098b7c2709582bda95292239c7612)


5 of 5 02-Apr-15 3:25 PM

kalshagar - arduino and a nintendo ds touch screen.pdf

Documents