C/C++ Programming Help Thread

[yaustar]

I still need a way to dev for psp without cgwin emulator.

There are several ways about this.

- Keep Cygwin to compile and update the toolchain but setup an IDE with the toolchain so you can build directly from the IDE without Cygwin running.
- Download a precompiled toolchain and setup an IDE with it so you can bulid directly from the IDE.

I have done this before but it requires some knowledge on how the toolchain works and how the current makefile creates the PBP.

Search on this forum on how to setup Code::Blocks with DevkitPSP to get you started.

[spike021]

It is a matter of opinion but the general consensus is to learn programming and the language on the easiest platform possible to minimise the possible number of 'distractions' that get in the way.

But a question, what happens when you don't have the particular platform that is useful for 'beginners?' When I first started out months ago, I think you said the same thing to me. You claim Windows is easiest, but the closest that some people might get to doing real programming might be on a more complicated platform.

You call it the general consensus, but I have a good feeling that its not. Yeah, Window's is the pretty much mainstream platform atm, but that doesn't mean everyone uses it.

What if a beginner wanted to learn programming, but didn't own any computer, nor was able to purchase one? Of course he had a small platform-type device (in this case, a PSP) to work with. If all he could code for, was the PSP.... wouldn't he take whatever advantage he could take?

The point of the story is that you use the resources you have. And that you don't have to deal with what everyone else tells you whats best, and whats not.

[eldiablov]

What if a beginner wanted to learn programming, but didn't own any computer

You need a computer to compile your code genius.

[Digikid13]

There are several ways about this.

- Keep Cygwin to compile and update the toolchain but setup an IDE with the toolchain so you can build directly from the IDE without Cygwin running.
- Download a precompiled toolchain and setup an IDE with it so you can bulid directly from the IDE.

I have done this before but it requires some knowledge on how the toolchain works and how the current makefile creates the PBP.

Search on this forum on how to setup Code::Blocks with DevkitPSP to get you started.

Thanks I'm going to try it now, and cgwin and toolchain didn't work for me that is why I needed a different way.

[_dysfunctional]

It didn't work for you, or you just couldn't figure what you did wrong while installing it?

[Khatharr]

Yeah, I used the VS debugger in college. That's how a debugger ought to work. Now if I can just get psplink to run my programs correctly I can use GDB. XD

Digikid, why isn't cygwin working for you? What's it doing?

[PSProgramer]

Hey does anybody know how to change what the home button does when using OSLib?? I've looked in the OSLib documentation, but haven't had any luck yet. I would really appreciate it, thanks.

[eldiablov]

If you dont implement the callbacks the home button will do nothing anyway. So check the functions for key presses in oslib. If there is one for home then use it.

[PSProgramer]

acctually I don't need to set all of the call backs in the beggi ning with OSLib to make the home button work, but I'll look into the control functions, and see what i can come up with, thanks.

[slicer4ever]

IIRC, you need kernel mode to use the home button for other uses than home the button

[yaustar]

What if a beginner wanted to learn programming, but didn't own any computer, nor was able to purchase one?

Then what do you code on? Sure, you can script on your PSP and fine, given that there are no other choices, you play the hand you are dealt.

But a question, what happens when you don't have the particular platform that is useful for 'beginners?' When I first started out months ago, I think you said the same thing to me. You claim Windows is easiest, but the closest that some people might get to doing real programming might be on a more complicated platform.

I don't see how not having the resources changes the opinion on the 'easiest' platform.

[PSProgramer]

how do i use kernel mode???

[Davee]

how do i use kernel mode???

Export from a kernel mode prx (0x1000).

[PSProgramer]

hmm, ok, thanks.

[slicer4ever]

not possible on 3xx fw, will it is, but you'd need to start a prx first, and it's far more complicated(not rly to those who know how to do it) than i've ever explored, however i've never needed the home button so...

[PSProgramer]

yeah, wasn't really a nessecity, just an idea i had. I probobly will not mess with it right now.

[Davee]

not possible on 3xx fw, will it is, but you'd need to start a prx first, and it's far more complicated(not rly to those who know how to do it) than i've ever explored, however i've never needed the home button so...

It's not complex at all...

SceUID modid = pspSdkLoadStartModule("somekernelprx", 1);

Returns < 0 on Error.

[spike021]

Then what do you code on? Sure, you can script on your PSP and fine, given that there are no other choices, you play the hand you are dealt.

But the part I left out, is that they may have the opportunity to program some simple apps on a school computer, or work computer. But as it's not personally theirs, they don't have the full allowance on what they can do.

Although its not a problem anymore for myself because I obtained a cheap Compaq Presario laptop used.

I don't see how not having the resources changes the opinion on the 'easiest' platform.

Actually, it does. Maybe someone is from a really poor country, but they get the opportunity to go to a foreign university/school. That school might not have Windows, and the person might not have enough money to purchase their own.

[Raphael]

But the part I left out, is that they may have the opportunity to program some simple apps on a school computer, or work computer. But as it's not personally theirs, they don't have the full allowance on what they can do.

As long as you don't have your own PC to play around with, you won't come very far concerning programming anyway... so that's not really an argument IMO. If you just want to sneak into programming concepts from a school PC, you really shouldn't choose C as your first language, at least unless the PC has an IDE pre installed (in which case there's just yet another reason to keep at PC programming rather then aiming at PSP). There's things like basic, lua or other scripting languages that are easily setup to have your code being run. Or you could start with some web programming in PHP. There's lots of easier choices in that case.

Actually, it does. Maybe someone is from a really poor country, but they get the opportunity to go to a foreign university/school. That school might not have Windows, and the person might not have enough money to purchase their own.

You still don't get the point, do you? It's not a thing about Windows or LINUX or OSX or any specific OS at all. It's about having a PC (that you need anyway to get in contact with programming, as I doubt anyone will hear about 'programming' and just be interested if he never really used a PC to some extent) which is easily setup to compile C code for PC (if you have the permissions), and hence learn programming IN that environment first. It's the easiest solution to avoid overcomplicating things and not having to deal with things that are not specific to basic programming (special hardware and hence behaviour, special libraries, etc.).

[yaustar]

...

I agree. The lack of resources does not change what is the easiest path, it just changes the paths that are available.

[MiKeY188]

Is there and Sceio tutorials or samples?

I mainly want to copy a file from flash0 and paste it in a folder in ms0:/

Thanks for help.

[eldiablov]

Look
At
The
Headers

[MiKeY188]

arrgh you make things sound so simple :) lol

[Davee]

arrgh you make things sound so simple :) lol

Well, they relatively are....

http://psp.jim.sh/pspsdk-doc/group__FileIO.html

Read pl0x

[Digikid13]

Um im not really sure what happened I think that it was something with the svn update. also some folders were missing.
-=Double Post Merge =-

It didn't work for you, or you just couldn't figure what you did wrong while installing it?

That too XP I just read what it said. The directions.

[Hardrive]

Is there and Sceio tutorials or samples?

I mainly want to copy a file from flash0 and paste it in a folder in ms0:/

Thanks for help.

There's some examples on psp-programming.com in the wiki. Additionally, I believe that harleyg elaborated on those wiki posts in the forums (at psp-programming).

[cutch]

Okay, I've been stuck on this for a while I have a png and it has an alpha layer.
When i draw it in 2d its fine.

I've been trying to rotate it. So I textured it to a quad.

But on the quad in 3d the outlines of the solid image are stretched over the alpha parts.

So basically how do you make a textured alpha image, draw its alpha channel.

[Khatharr]

@cutch:
Are you saying that there's an outline being drawn around the object, like it's being blended with whatever's behind it around the edges? I ran into a similar problem recently. I haven't tested it yet, but I think you can solve the problem by disabling blending before drawing the primitive (just set your alpha test to reject zero-alpha pixels) and then just turn it back on when you're done with the rotated primitives. The only real problem there is that you lose blending. I think the 'proper' way to do it would be to use the stencil buffer but my stencil-fu is still in the theoretical area until I finish reading this stupid book, so I can't help you there.

Am I understanding what you're saying correctly?

@Digikid13:
If you PM me maybe I can walk through the install with you and we can find/fix the problem?

@PSP gurus:
Does anyone know a link to some info about the PSAR format that I can actually use to write programs that deal with the format? I've been googling around and haven't found any format-specific info. I thought about trying to get ahold of Red Squirrel or PspPet but I thought I'd ask here first to avoid bothering them. I don't need any crypt info. I just want to know if the format uses any compression/etc and how the data in it is stored. I'd like to create my own PSAR files to store metadata in and I just want to know if I should try to use the existing format or just create my own.

[PirataNervo]

About the PSAR format:
http://forums.ps2dev.org/viewtopic.p...ht=psar+format

[Khatharr]

Thanks, PN. I can't tell from this whether the format is ridiculous or if this is just people experimenting with it. I'll just proceed with the custom format then.