C/C++ Programming Help Thread

[malliet]

@slicer4ever

Thanks I shall take a look at it

[Netaro]

I haven't done anything for psp in a long time, and thus, i forgot basically anything.
So, as i'm learning from the basics i've got some problems.

so, i have Test.txt which looks like this -

7
3
2
2

And then, in code -

int w=0,h=0,x=0,y=0;
       SceUID file = sceIoOpen("Test.txt", IOASSIGN_RDONLY, 0777);
	sceIoRead(file, &w,sizeof(int));
	sceIoRead(file, &h,sizeof(int));
	sceIoRead(file, &x,sizeof(int));
	sceIoRead(file, &y,sizeof(int));
	oslPrintf("\n %d \n %d \n %d \n %d \n",w,h,x,y);

And what i see?

856296754
221383281
168635938
589505315

Change from sizeof to 1 gives another set of strange numbers.
So, how do i fix it?

[malliet]

Yo guys i'm back with a new question:P I want to use a ICON0.png for my eboot so I put the icon0 in the folder of the main.c and makefile and added this line to the makefile:
#PSP_EBOOT_ICON = ICON0.PNG

But when I compile and i put the eboot on my psp i see the standard ICON0.png. What am I doing wrong?

[Davee]

Remove the '#'.

[Auraomega]

Remove the '#'.

# in makefiles is commenting the code, very much like // in C++.

-Aura

[malliet]

Oke

[slasher101]

[SPOILER]

#include <pspkernel.h>
#include <pspdebug.h>
#include <psppower.h>
#include <pspkerneltypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <pspthreadman.h>
#include <pspdisplay.h>
#include <pspctrl.h>
#include <string.h>
#include <pspsdk.h>
#include <pspgu.h>
#include <png.h>
#include <pspidstorage.h>
#include <string.h>


extern int ReadKey(int key, char *buffer);
extern int WriteKey(int key, char *buffer);
extern int CreateKey(int key);
extern int DeleteKey(int key);
extern void dump();

/* 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;
}

int check_mobo(void)
{
    int mobo;
    char buffer[512];

    ReadKey(0x0100, buffer);
    mobo = buffer[0x03f];

    ReadKey(0x0050, buffer);
    mobo = (mobo << 8) | buffer[0x021];

    return mobo;
}
void refresh()
{

pspDebugScreenClear();


get_info();
}
void get_info()
{

printf("*******************Motherboard/IdStorage Info***********************\n");
        switch (check_mobo())
        {
            case 0x0101:
            printf("test identifies the motherboard as a TA-079/81\n");
            break;
            case 0x0202:
            printf("test identifies the motherboard as a TA-082/86\n");
            break;
            case 0x0303:
            printf("test PSP identifies the motherboard as a TA-085\n");
            break;
            default:
            printf("IdStorage seems to be corrupt, please use DC8 to make a new one!\n");
            break;
        }
        


printf("\n********************************************************************\n");
}

int main() { 
pspDebugScreenInit();
SetupCallbacks();
SceCtrlData pad;
 
sceCtrlReadBufferPositive(&pad, 1);

SceUID idmod = pspSdkLoadStartModule("ms0:/seplugins/idstorage.prx", PSP_MEMORY_PARTITION_KERNEL);



	if ((idmod < 0))	{
	pspDebugScreenClear();
      printf(" Error 0x%08X loading/starting idstorage.prx\nPlease make sure it is located at <ms0:/seplugins>/!!\n", idmod);
      sceKernelDelayThread(3*1000*1000);
      sceKernelExitGame();
   	} else { 
      refresh();
	}


while(1) {
          sceCtrlReadBufferPositive(&pad, 1);
          if(pad.Buttons & PSP_CTRL_CROSS) {
                    refresh();
          }
          if(pad.Buttons & PSP_CTRL_SQUARE) {
			pspDebugScreenClear();
                  printf("Exiting to xmb in 2 seconds....\n\nPlease wait for the XMB to load.");
			sceKernelDelayThread(2000000);
                  sceKernelExitGame();

                                        }
          if(pad.Buttons & PSP_CTRL_TRIANGLE) {
                   

                                              }
          if(pad.Buttons & PSP_CTRL_CIRCLE) {
                 
                                            }
}

sceKernelSleepThread(); 
return 0; 
}

[/SPOILER]


plz help, using check_mobo always returns error, but im sure my idstorage is fine!...

!~SlasheR~!

[slicer4ever]

why don't you just print out the check_mobo() function on several psp's, and see what it's returning as

[malliet]

Is it possible to disable the gameboot screen with a piece of code?
If yes; where can I find this?

[NoEffex]

Is it possible to disable the gameboot screen with a piece of code?
If yes; where can I find this?

I'd decrypt the game loader, use "prxtool --elfout FILE.prx > FILE.elf", stick it in a disassembler, find where it loads gameboot.pmf or whatever, then branch over it(beq $zero, $zero, 0xADDYTOGOTO or j 0xADDYTOGOTO), requires some asm knowledge. Then find the exact address, then do something like

*((unsigned int*)((unsigned int)ADDRESS)) = 0xASMVALUEOFBRANCHORJ;

[eldiablov]

I'd hook the function that loads the gameboot and replace it with a function that loads a dummy gameboot (0 bytes)

[Netaro]

Don't want to be insistent mcuh, but can somebody help me with my problem on the previous page?

http://forums.qj.net/showthread.php?...=1#post2141464
Link to the post.

[slasher101]

why don't you just print out the check_mobo() function on several psp's, and see what it's returning as

Yea i would but i only have a slim, looking to buy a phat. :Jump:

ill see if i can borrow my friends.

!~SlasheR~!

--EDIT--

i tried uploading it but it keeps saying something about my "Quota Limit" the zip is only 132kb?

[slicer4ever]

sendspace.com, just print out the results i'll give u the results from my 2 phats

[slasher101]

sendspace.com, just print out the results i'll give u the results from my 2 phats

Fix It PSP = http://www.sendspace.com/file/9gu8vg
Still in early stages :-)


!~SlasheR~!

[NoEffex]

Don't want to be insistent mcuh, but can somebody help me with my problem on the previous page?

http://forums.qj.net/showthread.php?...=1#post2141464
Link to the post.

I had that happen to me when I loaded more than desired. You're probably best off loading it to a buffer and going from there, or do something like 8(assuming you're going for just the 32 bits) instead of sizeof(int).

[basfreak]

I'd decrypt the game loader, use "prxtool --elfout FILE.prx > FILE.elf", stick it in a disassembler, find where it loads gameboot.pmf or whatever, then branch over it(beq $zero, $zero, 0xADDYTOGOTO or j 0xADDYTOGOTO), requires some asm knowledge. Then find the exact address, then do something like

*((unsigned int*)((unsigned int)ADDRESS)) = 0xASMVALUEOFBRANCHORJ;

Or patch the fileIoOpen function and check if it loads gameboot.pmf, like this:

patchedFileIoOpen(char[500] fileName) {
char[500] file;
  if(fileName == "flash0:/resources/bla/bla/gameboot.pmf") {
     file = "ms0:/gameboot.pmf";
     originalFileIoOpen(file);
  } else {
     originalFileIoOpen(fileName);
  }
}

Look at hellcats wallpaper changer source for patching functions.

[Xsjado7]

Currently playing around with .mp3 loading/playing using pspmp3.h. Most of my .mp3's play fine however sceMp3Decode returns 0x80671103 when playing some. Anyone know of the cause of this?

[slasher101]

i dont know, try to look in the sdk docs to see if its listed there :)
-=Double Post Merge =-
is there a function to get the tachyon, pommel and the rest of the things??

the guys at ps2dev.org = :Argh:


!~SlasheR~!

[yaustar]

Don't want to be insistent mcuh, but can somebody help me with my problem on the previous page?

http://forums.qj.net/showthread.php?...=1#post2141464
Link to the post.

You should be reading chars, not ints from the text file.

[slicer4ever]

slasher, i keep getting an error saying that it can't find the idstorage.prx, u seem to want it on the ms so i pulled it out of flash and placed it where your program said to place it, but it still wouldn't load

[slasher101]

srry need to fix that

place fixitpsp.prx in ms0:/seplugins/

then it will work,

thx for testing it =)

!~SlasheR~!

[slicer4ever]

i did do that, and it wasn't asking for fixitpsp.prx, but for idstorage.prx to be in ms0:/seplugins/, even after placing idstorage.prx in their it still failed

[Auraomega]

I'm begining to get a tad annoyed at some code I've written, I'm trying to compile a prx but it fails with an error which doesn't make sense:

int module_start(SceSize args, void *argp)
{
	...
	return 0;
}

int module_stop(void)
{
	return 0;
}

# Define the exports for the prx
PSP_BEGIN_EXPORTS

# These four lines are mandatory (although you can add other functions like module_stop)
# syslib is a psynonym for the single mandatory export.
PSP_EXPORT_START(syslib, 0, 0x8000)
PSP_EXPORT_FUNC_HASH(module_start)
PSP_EXPORT_VAR_HASH(module_info)
PSP_EXPORT_END

PSP_EXPORT_START(flashPatch, 0, 0x0)
PSP_EXPORT_END

PSP_END_EXPORTS

TARGET = patch
OBJS = main.o 

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

BUILD_PRX = 1
PRX_EXPORTS = exports.exp

USE_KERNEL_LIBC=0
USE_KERNEL_LIBS=0

LIBDIR =
LDFLAGS = -mno-crt0 -nostartfiles


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

The error is:

/usr/local/pspdev/lib/gcc/psp/4.1.0/../../../../psp/bin/ld: warning: cannot find
entry symbol module_start; defaulting to 0000000000000000
exports.o:(.rodata.sceRes ident+0x8): undefined reference to `module_start'
collect2: ld returned 1 exit status

I've had this before, but whats really strange is I copied the exports, makefile and removed the functions from a compiling prx to test, I got the same error, yet I can compile prxs fine without that error in other cases. Is there something simple I'm missing?

-Aura

[slasher101]

@slicer i know it asks for idstorage.prx but you have to place fixitpsp.prx ~NOT~ idstorage, if it still doesnt work it cant load it for some reason

!~SlasheR~!

[slicer4ever]

i know, i've done both in that folder, but it won't load, sorry, your probably going to need to borrow your friend's phat and see if this well even work for phats(don't see why not, but you never know)

[slasher101]

yep ok =),

ive been playing around a bit and found this peice of code compiles but...
nothing gets shown on screen at runtime

// Hello World - My First App for the PSP

/*
This program was created by (Your Name Here) on (Date Here)
It is a simple "Hello World" Application.
*/

#include <pspkernel.h>
#include <pspdebug.h>
#include <pspctrl.h>
#define printf pspDebugScreenPrintf
#define settextcolor pspDebugScreenSetTextColor
#define setbackcolor pspDebugScreenSetBackColor
#define clearscreen pspDebugScreenClear



PSP_MODULE_INFO("Scroller", 0, 1, 5); 





/* 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;
}


void fixtext(int at)
{
pspDebugScreenClear();
if(at==1)
{
	settextcolor(0x00FF0000);
	printf("1\n");
	settextcolor(0x000000FF);
	printf("2\n3");
	
} else if(at==2)
{
settextcolor(0x000000FF);
printf("1\n");
settextcolor(0x00FF0000);
printf("2\n");
settextcolor(0x000000FF);
printf("3");
} else if (at==3)
{
	settextcolor(0x000000FF);
	printf("1\n2\n");
	settextcolor(0x00FF0000);
	printf("3");
}
}




int main() { 
pspDebugScreenInit();
SetupCallbacks();
SceCtrlData pad;
 int at = 1;
sceCtrlReadBufferPositive(&pad, 1);
pspDebugScreenSetTextColor(0x00FF0000);
while(1)
{
	if(pad.Buttons & PSP_CTRL_UP) {
		at += 1;
		fixtext(at);
	}
	if(pad.Buttons & PSP_CTRL_DOWN) {
		at -= 1;
        fixtext(at);
	}
}

      



sceKernelSleepThread(); 
return 0; 
}

plz help

!~SlasheR~!

[Auraomega]

No delays, you're running through that loop probably 200 times before you remove your finger, thus thats + or - 200. You have no delay/checks to allow you to stop pressing the button, nor do you have any limits (I.E. at = 4 which isn't supported).

-Aura

EDIT:

Also, your method is going to get you seriously bogged down with code if you add lots of possibilities, something like this would be preferable:

void fixtext(int at)
{
	for(int loop = AT_MIN; loop < AT_MAX; loop++)
	{
		if(loop == at)
		{
			settextcolor(0x00FF0000);
		}
		else
		{
			settextcolor(0x000000FF);
		}
		printf("%i"\n, loop);
		/*
		or if you are using non-integer values as options
		use if statements or switches (although I dislike switches as
		people commonly forget the break and mess up their code)
		
		if(loop == 1)
		{
			printf("option 1\n");
		}
		if(loop == 2)
		{
			printf("option 2\n");
		}
		*/
	}
}

notice how the code would be significantly smaller? It makes stuff like this easier to search through, because believe me, when you have files with over 5000 lines of code seeing a function like yours becomes annoying

-Aura

[slasher101]

thanks and how would i fix it?

and as for your prob

PSP_EXPORT_START(flashPatch, 0, 0x0)
PSP_EXPORT_FUNC(something_HERE)
PSP_EXPORT_END

[Auraomega]

Check my post for some shortening code bits...

Search on here for lastpad methods, or you could use sceKernelDelayThread(int delay); although that method still leaves chance for an exceptionally slooooooow person to still hit the button.

My question was about a function defined already, its asking for module_start which is define in both the source and the exports already. Re-read the post to see my problem.

-Aura