C/C++ Programming Help Thread

[JaSo PsP]

@yaustar

I used the code that you posed and it worked. I have got a second counter based on the ticks.

However...

When i divide res by 1000, to get a millisecond counter, it goes ALOT slower, 1000 milliseconds pass in about 15 seconds, when 1000ms are supposed to be 1 second.

[JaSo PsP]

ah CRAP! i JUST realised WHY!

It takes longer to loop thru the program than it does to pass one millisecond! And MS can only ever increase by one!

I think i can figure this out...

[_df_]

aaaah you just discovered why you need to understand fps + timestepping..

Fix Your Timestep! Gaffer on Games

[pspwxp_fan]

Ok, here's the biggest newb question yet, probably.
I have Dev-c++ and just downloaded MinPSPSDK. Can someone tell me how to directly code and compile psp homebrew from the dev-c++ IDE please

[FaT3oYCG]

add the min psp sdk as an external compiler in the settings that is more of a dev c++ question than a psp programming one.

[pspwxp_fan]

Can't find any way to do that .
Added directories in Compiler options but it (obviously) didn't work.

[mootjeuh]

okay, I know this isn't much of a C/C++ question, but can someone point me to some MIPS Assembly tutorials?

[Davee]

Originally Posted by mootjeuh

okay, I know this isn't much of a C/C++ question, but can someone point me to some MIPS Assembly tutorials?

Tutorial? doubts.
It's not something usually given as a tutorial, it's way too straightforward to tutor. You can get mnemonic definitions from a reference set (easily googled). Basically, you need to know how a processor operates to understand assembler language.

[atomic_boneman]

Why is it so damn difficult to set-up the psp programming environment.I downloaded mini blah blah blah, i have dev C++ and even tried to add SQL as an external compiler in dev c++ for other things and all i get are errors...its so frustrating. :ah)

[mootjeuh]

Originally Posted by atomic_boneman

Why is it so damn difficult to set-up the psp programming environment.I downloaded mini blah blah blah, i have dev C++ and even tried to add SQL as an external compiler in dev c++ for other things and all i get are errors...its so frustrating. :ah)

dude just use minPSPw

[FaT3oYCG]

lol how many times :P mot devs only require MinPSPW and you would only need the toolchain if you needed to add a custom library for some reason XD.

[lilmnm]

Originally Posted by mootjeuh

okay, I know this isn't much of a C/C++ question, but can someone point me to some MIPS Assembly tutorials?

here is a intro from Central Connecticut State University it had a few tuts in it when i was skkimming through it

Programmed Introduction to MIPS Assembly Language

[mootjeuh]

Originally Posted by lilmnm

here is a intro from Central Connecticut State University it had a few tuts in it when i was skkimming through it

Programmed Introduction to MIPS Assembly Language

okay thanks
new question, if I want to open a file and read it using the PSPSDK, should I do something like this:

SceUID file = sceIoOpen("file.txt", PSP_O_RDONLY, 0777);
void *data;
sceIoRead(file, data, sizeof(data));

?


EDIT: nvm, I figured it out

[pentagram]

Some questions:


1. How do I get the FW version and motherboard version, and print them. I used sysparam sample and i want to print the FW and motherboard version.

2.I`ve tryed a psp buttons test:

sceCtrlReadBufferPositive(&pad, 1); 

		printf("Analog X = %d ", pad.Lx);
		printf("Analog Y = %d \n", pad.Ly);

		if (pad.Buttons != 0){
			if (pad.Buttons & PSP_CTRL_SQUARE){
				printf("Square pressed \n");
			}
			if (pad.Buttons & PSP_CTRL_TRIANGLE){
				printf("Triangle pressed \n");
			} 
			if (pad.Buttons & PSP_CTRL_CIRCLE){
				printf("Cicle pressed \n");
			} 
			if (pad.Buttons & PSP_CTRL_CROSS){
				printf("Cross pressed \n");
			} 

			if (pad.Buttons & PSP_CTRL_UP){
				printf("Up pressed \n");
			} 
			if (pad.Buttons & PSP_CTRL_DOWN){
				printf("Down pressed \n");
			} 
			if (pad.Buttons & PSP_CTRL_LEFT){
				printf("Left pressed \n");
			} 
			if (pad.Buttons & PSP_CTRL_RIGHT){
				printf("Right pressed \n");
			}      

			if (pad.Buttons & PSP_CTRL_START){
				printf("Start pressed \n");
			}
			if (pad.Buttons & PSP_CTRL_SELECT){
				printf("Select pressed \n");
			}
			if (pad.Buttons & PSP_CTRL_LTRIGGER){
				printf("L-trigger pressed \n");
			}
			if (pad.Buttons & PSP_CTRL_RTRIGGER){
				printf("R-trigger pressed \n");
			}      
		}
	}

But i`ve added more from pspctrl.h
->

			if (pad.Buttons & PSP_CTRL_HOME){
				printf("Ati apasat butonul 'HOME' \n");
				}
			if (pad.Buttons & PSP_CTRL_HOLD){
				printf("Ati activat butonul 'HOLD' \n");
			}
			if (pad.Buttons & PSP_CTRL_NOTE ){
				printf("Ati apasat butonul 'NOTE ' \n");
			}
			if (pad.Buttons & PSP_CTRL_SCREEN ){
				printf("Ati apasat butonul 'SCREEN ' \n");
			}
			if (pad.Buttons & PSP_CTRL_VOLUP ){
				printf("Ati apasat butonul 'VOLUME UP' \n");
			}
			if (pad.Buttons & PSP_CTRL_VOLDOWN ){
				printf("Ati apasat butonul 'VOLUME DOWN' \n");
			}
			if (pad.Buttons & PSP_CTRL_WLAN_UP ){
				printf("Ati activat butonul de activare 'WLAN' \n");
			}
			if (pad.Buttons & PSP_CTRL_REMOTE ){
				printf("Unitatea UMD functioneaza. Aveti un UMD inserat.\n");
			}
			if (pad.Buttons & PSP_CTRL_MS ){
				printf("Aveti introdus un card in PSP-ul dvs.\n");
			}

I`ve know that WLAN_UP, MS and REMOTE don`t work, BUT, how do i make HOME BUTTON,SCREEN and other added work? Becouse they do they standard function (Home->Exit homebrew).

[mootjeuh]

does anyone know if there's a graphics.c version of Danzeff's OSK ? coz I really don't understand SDL...
help is greatly appreciated

[fasa123]

hello, how i can add more fields to an array at runtime
(for example, i've an array (char* Array[3]; Array[1] = "Bla", Array[2] = "Bla2" etc.)) and i want to add more fields (so that Array[3] gets for example 7 extra fields but that it does not overwrite Array[1] and Array[2]).

[slicer4ever]

Originally Posted by fasa123

hello, how i can add more fields to an array at runtime
(for example, i've an array (char* Array[3]; Array[1] = "Bla", Array[2] = "Bla2" etc.)) and i want to add more fields (so that Array[3] gets for example 7 extra fields but that it does not overwrite Array[1] and Array[2]).

if your using c, or even c++, than u can use realloc(IIRC), however if your using c++'s, new and delete statements, than you would need to dump the array to a temporary array, delete the old one, than re-size it and dump your old array back into your new one(this is assuming that you already understand dynamic arrays), this is because realloc only works with it's friends malloc and free, and is not cross compatible between the two

[fasa123]

i tried it with using new (Array = new int[10]) but when i compile the compiler says that the new statement is undefined oO
And how can i look if i'm using c or c++?

[Kode]

You're asking us how to know in what language(s) you are programming ( "How can I look if I'm using Lua or Python ?"... ).

Anyway in C++, you have std::string for this use.

[fasa123]

Originally Posted by Kode

You're asking us how to know in what language(s) you are programming ( "How can I look if I'm using Lua or Python ?"... ).

I mean c and c++ looks very same and so i do not knew this. now i found out, that if the file ending is cpp that it is c++ and if its just c than it c

Originally Posted by Kode

Anyway in C++, you have std::string for this use.

that was not my question.. i mean the new statement, for example a = new int[5]
and i found that new & delete is only in c++

PS:
How can i create a new thread, that delays itselfs for a certain time and then calls another viod.

[kweensey]

Hey,
can someone advice me which library is best for work with OpenType fonts?

Thanks.
kweensey

[Kode]

Originally Posted by fasa123

I mean c and c++ looks very same and so i do not knew this. now i found out, that if the file ending is cpp that it is c++ and if its just c than it c

Hum... C libraries can be used in C++, and then ? In order to program, you have to know in what language you are doing it...
( and programming in C++ is really not like programming in C )

Originally Posted by fasa123

that was not my question.. i mean the new statement, for example a = new int[5]
and i found that new & delete is only in c++

I was obviously talking about your first post

Originally Posted by fasa123

How can i create a new thread, that delays itselfs for a certain time and then calls another viod.

The thread's function should just... call sceKernelDelayThread, and then run another function (or thread) ?

[fasa123]

When i call sceKernelDelayThread the psp hangs for the indicated milliseconds

[Kode]

delays itselfs for a certain time

Is that not what you want ?
Its argument is a time in microseconds ( 1000 * millisecond_time ).

[slicer4ever]

i think, if i understand from what i read is that he wants the core of the game to continue running, than spawn a thread at a certain time, but not interrupt the game, if so he needs to look into creating timers

[Kode]

Oh, that's not that hard

A simple idea (it works, but it's perhaps not the best) is to use the timestamp (time or sceKernelLibcTime, it doesn't matter) and your ellapsed_time = new_time - old_time. Implementing pause is not hard either.

[mootjeuh]

does anyone know how to clear the ram ?

[Art]

I'm sure this could be simplified:

	lonwork = limit_left;
	latwork = limit_top;
	while (lonwork < displon) {lonwork = lonwork + zoom; xxx++;}
	while (latwork > displat) {latwork = latwork - zoom; yyy++;}

I just have a block.
It's all about incrementing xxx and yyy the correct number of times.
Any ideas?

[Art]

Got his sorted NVM.

Art 1 QJ 0

[Art]

Hi Guys,
Actually, I'm stuck on the second line...

The first while loop can be replaced with this:

float temp;
temp = displon - limit_left;
xxx = temp / zoom;

I can't work out the second while loop.
Any help appreciated.
Cheers, Art.