#include

const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
char keys[ROWS][COLS] = {
{‘1′,’2′,’3′,’A'},
{‘4′,’5′,’6′,’B'},
{‘7′,’8′,’9′,’C'},
{‘#’,'0′,’*',’D'}
};
byte rowPins[ROWS] = {2,3,4,5}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {6,7,8,9}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
byte ledPin = 13;

boolean blink = false;

void setup(){
Serial.begin(9600);
pinMode(ledPin, OUTPUT); // sets the digital pin as output
digitalWrite(ledPin, HIGH); // sets the LED on
keypad.addEventListener(keypadEvent); //add an event listener for this keypad
}

void loop(){
char key = keypad.getKey();

if (key != NO_KEY) {
Serial.println(key);
}
if (blink){
digitalWrite(ledPin,!digitalRead(ledPin));
delay(100);
}
}

//take care of some special events
void keypadEvent(KeypadEvent key){
switch (keypad.getState()){
case PRESSED:
switch (key){
case ‘#’: digitalWrite(ledPin,!digitalRead(ledPin)); break;
case ‘*’:
digitalWrite(ledPin,!digitalRead(ledPin));
break;
}
break;
case RELEASED:
switch (key){
case ‘*’:
digitalWrite(ledPin,!digitalRead(ledPin));
blink = false;
break;
}
break;
case HOLD:
switch (key){
case ‘*’: blink = true; break;
}
break;
}
}
———————————————————————

It looks like you are right, the kernel sources for the “Generation 7″ are for OMAP2, which is an ARM11 and the “Archos 7 Home Tablet” is apparently an ARM9 – as you say.

I have to say Archos are not making this easy with their product naming scheme, it’s all completely confusing.

Will amend the article.

- Angus

The Archos 7 Home Tablet, based on the same chipset as the Apad, has not complied to the GPL. Rockchip is the one stopping the source code from being released.

You wont see the GPL required source code for it until more people like you write about it.

Please amend your article. Thanks.

Seems like an interesting experiment. The last link you posted said this relies on phones with most of the Eclair (2.x) components already loaded, so presumably you need more than just “libdvm.so”

You should be able to find out what other libraries libdvm.so links against by using ‘nm’ or ’strings’ (strings is available in the Eken’s default firmware.) It’s likely there are other non-library files the JIT needs, and/or you need to clear the dalvik-cache directory as well.

I’ve been really busy lately but I might have a try and see what I can come up with. Try posting on slatedroid as well, people there will be interested in this.

- Angus

So this is a bit tricky because, as I said above, one of the bigger limitations of this technique is that you can’t do dynamic access to the EEPROM using a variable (ie array indexing).

You haven’t said exactly what datatype you want to save, but if it’s a small array (ie 5 integers) then you can load/save the entire array from EEPROM in one hit. This means holding the entire array in RAM, so it won’t work if
it’s a lot of data.

This code compiles but I haven’t tested it: http://gist.github.com/499528

However, if you only need to load/store 5 of the same datatype, and nothing else, then you may really be better off using one of the other techniques described at the top of the post.

Hth.

Nor can you install a new build of the Operating system. What’s good about open source you cannot use on any usable way?

You can add that they comply with opensorce at their own schedule. If the OS and tools have a new version the code can take months before becoming available. By then a newer version is usually out.

>The Web browser core in every tablet mentioned on this page and
>pretty much every ARM device comes from an Apple open source project.

Webkit is based on KHTML. Apple got off onto a bad start with the KHTML people, they didn’t recontribute back to KHTML and when they did it was such a manner that made it difficult to incorporate Apple’s changes back into KHTML.

>The kernel of OS X is open source. That is what is under iOS.
This is a classic case of Apple taking advantage of opensource and not contributing (much) back. It is based on the a BSD kernel under the BSD license which allows people to make use of the code without any obligation to give anything back. That’s exactly the kind of opensource Apple likes!