How To Build A Camera Program On Maemo

[divanov]

It could be whatever. Including improper code generation by MADDE, which has happened before.

[pta0007]

It could be whatever. Including improper code generation by MADDE, which has happened before.

Alright, I have got so many unnecessary troubles since I used MADDE. I shall try the native developping environment now.

Thank you very much for your reminder.

[divanov]

Alright, I have got so many unnecessary troubles since I used MADDE. I shall try the native developping environment now.

Thank you very much for your reminder.

I don't want to say this time the problem is MADDE. I simply cannot know what is particular problem. In such circumstances it's normally good idea to try in native Linux environment or WMware to check, if you have the same result or different. It could be device SW problem as well. Are you using the latest software on the phone?

[pta0007]

[QUOTE=divanov;707023It could be device SW problem as well. Are you using the latest software on the phone?[/QUOTE]
Yes, I think so. the basic information:

Nokia N900
Maemo 5
Version:2.2009.51-1.205.1

I am now trying to build the project in Ubuntu with Maemo5 SDK. I could run the camera.c on emulator. Now I want to ask how to build it on device? Could you please offer me the related links about it? It would be bettter if I could on-device debug immediately with scrachbox.

[divanov]

Yes, I think so. the basic information:

Nokia N900
Maemo 5
Version:2.2009.51-1.205.1

The latest build is 02-8 as far you can see from here:
http://tablets-dev.nokia.com/nokia_N900.php

I am now trying to build the project in Ubuntu with Maemo5 SDK. I could run the camera.c on emulator. Now I want to ask how to build it on device? Could you please offer me the related links about it? It would be bettter if I could on-device debug immediately with scrachbox.

Just activate ARMEL target and compile application there then copy binary to a device
http://maemo.org/development/trainin...00000000000000
Naturally you can use gdbserver on the device and some IDE on host system. There is a thread how you can do that using ESbox and N900 device.
http://discussion.forum.nokia.com/fo...727#post707727
However, I would suggest you to use printf-debugging, which is very simple and requires no setup.

[pta0007]

However, I would suggest you to use printf-debugging, which is very simple and requires no setup.

sorry to trouble you again. but what is printf-debugging? never heard of that before? any links?

btw, is there any instruction for setting up the CPU transparency on n900 (maemo5). I cant find one.

[divanov]

sorry to trouble you again. but what is printf-debugging? never heard of that before? any links?

http://en.wikipedia.org/wiki/Debuggi...ging_techiques.

btw, is there any instruction for setting up the CPU transparency on n900 (maemo5). I cant find one.

Why do you need to set CPU transparency on N900?

[pta0007]

Why do you need to set CPU transparency on N900?

I changed the target to FREMANTLE_ARMEL, recompiled and got an excutable file. But I got no idea how to use that on device--just send it to the device doesn't work, since it's not recognized by the device.

[divanov]

I changed the target to FREMANTLE_ARMEL, recompiled and got an excutable file. But I got no idea how to use that on device--just send it to the device doesn't work, since it's not recognized by the device.

This is just a binary file. You copy it through USB networking, or Mass storage, or WLAN, or any other available option to /home/user/ directory. Then open X Terminal and execute a command:

./your_binary_name

[pta0007]

thx, it works finally!

[divanov]

thx, it works finally!

Do you mean you were able to execute it on N900 or it actually works properly on N900 (without pipeline pausing problem).

[pta0007]

Do you mean you were able to execute it on N900 or it actually works properly on N900 (without pipeline pausing problem).

It works properly as it's supposed to, without any pipeline problem (so far as I know). Still wonder what the problem might be with MADDE+Qt on windows. Do you think it could be the problem using Qt and Gtk+ at the same time caused the failure in executing?

Just wonder how did you build the project, with gcc or qmake/make?

[divanov]

It works properly as it's supposed to, without any pipeline problem (so far as I know). Still wonder what the problem might be with MADDE+Qt on windows. Do you think it could be the problem using Qt and Gtk+ at the same time caused the failure in executing?

example_camera.c doesn't have any code related to Qt.

Just wonder how did you build the project, with gcc or qmake/make?

There is no way to avoid gcc usage. There are two alternative toolchains:
qmake (creates Makefile) -> make (uses gcc)
autotools (creates Makefile) -> make (uses gcc)
There is no significant difference between toolchains, if you use them properly.
maemo-examples has Makefile so it's enough to call "make" to build all examples.