C/C++ Programming Help Thread

[PSPJunkie_]

I see that's the source I used in my personal Lua Player w/ IR support (and flasing and directory dumping functions) I made 4 months or so ago (eww it's all sloppy...). How'd that get out? I think i gave it to one person... not sure... either way, you just gotta ask yourself whether this code will launch an eboot:

sceKernelLoadExec(path,NULL);

If so, then yes :)

Nope, that won't run. IIRC, sceKernelLoadExec() doesn't even take a path as a parameter.

[luizlizard]

Nope, that won't run. IIRC, sceKernelLoadExec() doesn't even take a path as a parameter.

Are you sure, because it worked in a simple test program i did.

SCRIPT int main() { pspDebugScreenInit(); SetupCallbacks(); sceKernelLoadExec("ms0:/eboot.pbp",NULL); sceKernelSleepThread(); return 0; }

And in the header file it states:

SCRIPT /** * Execute a new game executable, limited when not running in kernel mode. * * @param file - The file to execute. * @param param - Pointer to a ::SceKernelLoadExecParam structure, or NULL. * * @return < 0 on error, probably. * */

[PSPJunkie_]

Look here. You need to pass a struct to the second param, not null.
-= Double Post =-
Something like this, I would say:

int plEbootLoad(char* pathToPbp)
{
	if(strlen(pathToPbp) <= 0)
	{
		printf("Must pass the location of the PBP file.\n");
		return 0;
	}
	
	struct SceKernelLoadExecVSHParam pbpParam;
	memset(&pbpParam, 0, sizeof(pbpParam));
	
	pbpParam.size = sizeof(pbpParam);
	pbpParam.args = (strlen(pathToPbp) + 1);
	pbpParam.argp = pathToPbp;
	pbpParam.key = "game";
	
	if(sceKernelLoadExec(pathToPbp, &pbpParam) < 0)
	{	
		return 0;
	}
	
	return 1;
}

[Mr305]

What does "nan" mean in floats?

[yaustar]

What does "nan" mean in floats?

Not A Number.

http://en.wikipedia.org/wiki/NaN

[luizlizard]

Ok i got it, i will do it.

[Nicko01]

Hmmm... for some reason my code that i ported isn't working at all...
Nothing is displayed.
Here are the files:
http://mihd.net/09qzvw
The main.c:

#include <pspdisplay.h>
#include <stdlib.h>
#include <pspctrl.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspgu.h>
#include <png.h>
#include <stdio.h>
#include <time.h>
#include <psppower.h>
#include <pspaudio.h>
#include <pspaudiolib.h>
#include "graphics.h"
#define true 1
#define false 0
PSP_MODULE_INFO("BallBounce Test", 0, 1, 1);
/* Exit callback */
int exit_callback(int arg1, int arg2, void *common) {
          sceKernelExitGame();
          return 0;
}
/* Callback thread */
int CallbackThread(SceSize args, void *argp) {
          int cbid;

          cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
          sceKernelRegisterExitCallback(cbid);

          sceKernelSleepThreadCB();

          return 0;
}
/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void) {
          int thid = 0;

          thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
          if(thid >= 0) {
                    sceKernelStartThread(thid, 0, 0);
          }

          return thid;
}
char *path[2] = { "BGimage.png",  //0
                           "Ball.png"};       //1
int main()
{

	SetupCallbacks();
    pspDebugScreenInit();
    initGraphics();
    int x = 0;
    int y = 0;
    Image* images[2];
    int i;
    for(i = 0; i < 2; i++)
    {
          images[i] = loadImage(path[i]);
    }
    while(1)
    {

    blitAlphaImageToScreen(0 ,0 ,32 , 32, images[1], x, y);
    blitAlphaImageToScreen(0 ,0 ,480 , 272, images[0], 0, 0);
sceDisplayWaitVblankStart();
flipScreen();
 	}
    sceKernelSleepThread();
    return 0;
}

The makefile

TARGET = BouncingBallDemo
OBJS = main.o graphics.o framebuffer.o

CFLAGS = -O2 -G0 -Wall
CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
ASFLAGS = $(CFLAGS)

LIBDIR =
LIBS = -lpspgu -lpng -lz -lm -lpsprtc -lmad -lpspaudiolib -lpspaudio -lpsppower
LDFLAGS =

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = Bouncing Ball Demo

PSPSDK=$(shell psp-config --pspsdk-path)
include $(PSPSDK)/lib/build.mak

[Auraomega]

I'm having a problem again loading modules :Argh:

Using the pspSdkLoadStartModule, I sometimes load the modules fine, and other times... well I get an error message, and 0x44088000 as the error code.

I can load perfectly in 3.10, but when trying to run this in 1.50, I seem to get that error code a lot.

I've tried looking through and finding what exactly is causing the error, but to no avail, its not based on the loading code, because the exact same code can load another module perfectly, and the modules that won't work sometimes work when loaded from elsewhere...

Thanks for any help
-Aura

[PSPJunkie_]

Hmmm... for some reason my code that i ported isn't working at all...
Nothing is displayed.
Here are the files:
http://mihd.net/09qzvw
The main.c:

#include <pspdisplay.h>
#include <stdlib.h>
#include <pspctrl.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspgu.h>
#include <png.h>
#include <stdio.h>
#include <time.h>
#include <psppower.h>
#include <pspaudio.h>
#include <pspaudiolib.h>
#include "graphics.h"
#define true 1
#define false 0
PSP_MODULE_INFO("BallBounce Test", 0, 1, 1);
/* Exit callback */
int exit_callback(int arg1, int arg2, void *common) {
          sceKernelExitGame();
          return 0;
}
/* Callback thread */
int CallbackThread(SceSize args, void *argp) {
          int cbid;

          cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
          sceKernelRegisterExitCallback(cbid);

          sceKernelSleepThreadCB();

          return 0;
}
/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void) {
          int thid = 0;

          thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
          if(thid >= 0) {
                    sceKernelStartThread(thid, 0, 0);
          }

          return thid;
}
char *path[2] = { "BGimage.png",  //0
                           "Ball.png"};       //1
int main()
{

	SetupCallbacks();
    pspDebugScreenInit();
    initGraphics();
    int x = 0;
    int y = 0;
    Image* images[2];
    int i;
    for(i = 0; i < 2; i++)
    {
          images[i] = loadImage(path[i]);
    }
    while(1)
    {

    blitAlphaImageToScreen(0 ,0 ,32 , 32, images[1], x, y);
    blitAlphaImageToScreen(0 ,0 ,480 , 272, images[0], 0, 0);
sceDisplayWaitVblankStart();
flipScreen();
 	}
    sceKernelSleepThread();
    return 0;
}

The makefile

TARGET = BouncingBallDemo
OBJS = main.o graphics.o framebuffer.o

CFLAGS = -O2 -G0 -Wall
CXXFLAGS = $(CFLAGS) -fno-exceptions -fno-rtti
ASFLAGS = $(CFLAGS)

LIBDIR =
LIBS = -lpspgu -lpng -lz -lm -lpsprtc -lmad -lpspaudiolib -lpspaudio -lpsppower
LDFLAGS =

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = Bouncing Ball Demo

PSPSDK=$(shell psp-config --pspsdk-path)
include $(PSPSDK)/lib/build.mak

Long time, no see!

[Nicko01]

lol.... I took a break from programming a few months to play WoW.
I'm not sure why this always happens, but for some reason my stupid screen never is displayed.

[PSPJunkie_]

lol.... I took a break from programming a few months to play WoW.
I'm not sure why this always happens, but for some reason my stupid screen never is displayed.

D'oh.

[Nicko01]

what? dont like World of Warcraft?

[PSPJunkie_]

Well, you can say I'm wow-o-phobic. :P But, hey, we go back a long way, so whatever.


http://elite.proboards79.com :P Idiots United...

[Nicko01]

You were on idiots united???
What was your name?

[PSPJunkie_]

It's PSPJunkie :P

[Nicko01]

:) I should have known because of the NY Giants thing.
Well, lets get back on topic...

Can you see a problem?

[PSPJunkie_]

Did you run it through PSPLink?

[Nicko01]

no

[PSPJunkie_]

Got it!

'BGimage.png' is not actually a PNG file. If you ran it through PSPLink, you would see that libpng throws out an error (You don't notice it because it is with printf which doesn't go the PSPs screen). Rename 'BGimage.png' to 'BGimage.bmp' and resave it as a PNG in you preferred image editing program.

That's it :P

Although, just so you know, you blit the ball first, so the background in front of it and you will never see it. :P



EDIT: I attached the converted image.

[Nicko01]

oh cool.
thanks.

well, when i converted it, it must have been converted wrong.

lol... i didn't even put all of my code in there...
i forgot the whole bouncing part.

[PSPJunkie_]

No problem. When libpng threw the error, I just opened the file in a hex editor and saw the header was BMP.

[myschoo]

hi i'm still learning......
if i have something like this

int scePowerGetBatteryLifePercent(void);

how would i use it to print battery life?

[Nicko01]

how that works is that the int means it will be an interger.
void means it takes no parameters

This shows how to make it into a variable which can be used in all kinds of things:

int PowerRemaining = scePowerGetBatteryLifePercent();

[myschoo]

yeah thats what i thought:

int bat = scePowerGetBatteryLifePercent();

but im getting error:

$ make
psp-gcc -I. -I/usr/local/pspdev/psp/sdk/include -O2 -G0 -Wall -D_PSP_FW_VERSION=
150 -c -o main.o main.c
main.c:20: error: initializer element is not constant //this is that line
make: *** [main.o] Error 1

and also at the top i have:

# include <psppower.h>

[Nicko01]

make sure you have these:

#include <pspkernel.h>
#include <pspdebug.h>
#include <pspctrl.h>
#include <pspdisplay.h>
#include <stdio.h>
#include <pspmoduleinfo.h>
#include <psppower.h>

make sure this is in your makefile

LIBS = -lpsppower

[myschoo]

still same error o_O strange....... but anyway thx for help ;)

probably im doing something wrong...

and how would you print it? just:

printf("%d",bat)

??

[Nicko01]

yeah, thats right, as long as you have

#define printf  pspDebugScreenPrintf

in there.

[slicer4ever]

when making a function how can i return the info to the input command for example:

void function(int input){
input = 6;
}
int number=3;

function(number);

of course this isn't practical however how would i return the input 6 to number so i change it's value to 6 while keeping the function void and no need for a return

[yaustar]

when making a function how can i return the info to the input command for example:

void function(int input){
input = 6;
}
int number=3;

function(number);

of course this isn't practical however how would i return the input 6 to number so i change it's value to 6 while keeping the function void and no need for a return

C or C++?

[Mr305]

when making a function how can i return the info to the input command for example:

void function(int input){
input = 6;
}
int number=3;

function(number);

of course this isn't practical however how would i return the input 6 to number so i change it's value to 6 while keeping the function void and no need for a return

void function(int *input)
{
*input=6;
}

function(&number);

That's what U wanted?