C/C++ Programming Help Thread

[Anti-QuickJay]

Ah, Thanks a bunch...

[placo23]

if all you want to do is update the pspsdk component do this -

./toolchain.sh 3 6

I've tried the same as anti a while ago and got the same error.

Can you tell me what the 3 and 6 stand for?

Cheers

[Raphael]

The numbers of the scripts to execute. Take a look in the psptoolchain/scripts folder, there you'll see a set of scripts that download, compile and install the different parts needed for setting up the toolchain. If you only need the pspsdk, then it's enough if you only do step 6 (step 3 is only important if newlib or gcc is updated too).

[placo23]

The numbers of the scripts to execute. Take a look in the psptoolchain/scripts folder, there you'll see a set of scripts that download, compile and install the different parts needed for setting up the toolchain. If you only need the pspsdk, then it's enough if you only do step 6 (step 3 is only important if newlib or gcc is updated too).

Right... got it.. thanks!

I was trying with the -p at the end but with no success.

Cheers

[MikePiP]

I just got done installing the template for VC++ and I get an *.o error when I try to compile.

[Archaemic]

...

You can't compile PSP apps using VC++.

(By the way, I solved my problem earlier)

[cloudpjff7]

Hey, I've been in need for a working tutorial for installing the psptoolchain on mac osx leopard for a little while now. I've tried a few previous ones, but they seem to give me errors. Is their a foolproof method?

[BlackShark]

Assuming the text file starts with 2 integers containing the x and y size of the map, this should work;

FILE *fp = fopen( "file", "rb" ); // open the file
unsigned int sizex, sizey, i;
char **map; // put the map data in this
fread( &sizex, sizeof(int), 1, fp ); // read the x size of the map into sizex
fread( &sizey, sizeof(int), 1, fp ); // same with y
map = (char**) malloc( sizeof(char*) * sizex ); // allocate memory
for( i = 0; i < sizex; i++ )
{
   map[i] = (char*) malloc( sizeof(char) * sizey );
}
for( i = 0; i < sizex*sizey; i++ )
{
    map[i/sizey][i%sizey] = fgetc( fp ); // read the data
}

using this, would i need to put a space inbetween the intigers for the width and height?

[yaustar]

...

You can't compile PSP apps using VC++.

(By the way, I solved my problem earlier)

Actually, you can. The simplest way is to use a Makefile project.

[Raphael]

using this, would i need to put a space inbetween the intigers for the width and height?

No, but you'd have to put them in binary form there.

[FaT3oYCG]

does anyone know why i get this error while running the ./toolchain.sh script, i have all of the relevant paths set i think - here is my cygwin.bat

@echo off

C:
chdir C:\cygwin\bin

set PSPDEV=/usr/local/pspdev
set PSPSDK=$PSPDEV/psp/sdk 
set PATH=$PATH/usr/local/pspdev/bin

bash --login -i

and i installed every single possible thing for cygwin so i don't think that is what it is

here is the error

df_to_usi.o libgcc/./_usi_to_df.o libgcc/./unwind-dw2.o libgcc/./unwind-dw2-fde.
o libgcc/./unwind-sjlj.o libgcc/./gthr-gnat.o libgcc/./unwind-c.o
psp-ar  rc ./libgcov.a libgcc/./_gcov.o libgcc/./_gcov_merge_add.o libgcc/./_gco
v_merge_single.o libgcc/./_gcov_merge_delta.o libgcc/./_gcov_fork.o libgcc/./_gc
ov_execl.o libgcc/./_gcov_execlp.o libgcc/./_gcov_execle.o libgcc/./_gcov_execv.
o libgcc/./_gcov_execvp.o libgcc/./_gcov_execve.o libgcc/./_gcov_interval_profil
er.o libgcc/./_gcov_pow2_profiler.o libgcc/./_gcov_one_value_profiler.o
make[3]: psp-ar: Command not found
make[3]: psp-ar: Command not found
make[3]: *** [libgcc.a] Error 127
make[3]: *** Waiting for unfinished jobs....
make[3]: *** [libgcov.a] Error 127
make[3]: Leaving directory `/home/[email protected]/trunk/psptoolchain/build/gcc-4.1.0/bu
ild-psp/gcc'
make[2]: *** [stmp-multilib] Error 2
make[2]: Leaving directory `/home/[email protected]/trunk/psptoolchain/build/gcc-4.1.0/bu
ild-psp/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/home/[email protected]/trunk/psptoolchain/build/gcc-4.1.0/bu
ild-psp'
make: *** [all] Error 2
../scripts/002-gcc-4.1.0-stage1.sh: Failed.

[email protected]@craigs_computer ~/trunk/psptoolchain
$

[Raphael]

Type the following two lines in cygwin and restart it. Then run the toolchain again.

echo "export PSPDEV=/usr/local/pspdev" >> ~/.bashrc
echo "export PATH=$PATH:$PSPDEV/bin" >> ~/.bashrc

If that doesn't help, type "echo $PSPDEV" and "echo $PATH" and show us what it printed.

[FaT3oYCG]

i typed both of those restarted but it didnt seem to do anything

i cganged the export to set because that is what cygwin accepts it is export on linux and restarted nothing had changed and here are my echo's for my paths

[email protected]@craigs_computer ~
$ echo $PSPDEV
/usr/local/pspdev

[email protected]@craigs_computer ~
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:$PATH/usr/local/pspdev/bin:/usr/lib/
lapack

[email protected]@craigs_computer ~
$

which seem to be right so why do i get that error ????????????

also this is my .bashrc file now

export PSPDEV=/usr/local/pspdev
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:$PATH/usr/local/pspdev/$
set PSPDEV=/usr/local/pspdev
set PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:$PATH/usr/local/pspdev/bin$

i checked it out using nano

i.e. nano ~/.bashrc

- ill try running the toolchain script again now and come back here if i get the same or a new error thanks

[Raphael]

[email protected]@craigs_computer ~
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:$PATH/usr/local/pspdev/bin:/usr/lib/
lapack

which seem to be right so why do i get that error ????????????

Isn't correct. There shouldn't be the literal "$PATH" in there before the /usr/local/pspdev/bin

also this is my .bashrc file now

export PSPDEV=/usr/local/pspdev
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:$PATH/usr/local/pspdev/$
set PSPDEV=/usr/local/pspdev
set PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:$PATH/usr/local/pspdev/bin$

Make that .bashrc file look like this:

export PSPDEV=/usr/local/pspdev
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/local/pspdev/
set PSPDEV=/usr/local/pspdev
set PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/local/pspdev/bin

And cygwin should accept export, since it simulates a *NIX environment. If your cygwin bash doesn't accept that, then you haven't set it up correctly.

[Auraomega]

In Devhook, the system was rebooted and things were loaded from the memorystick instead of the flash right? Would this be possible to do in the flash, for example to load a different vshmain.prx? I'm looking for a way to load PSPLock only on system startup, and not when a game is exited, and this seems to most fesible way currently. Can anyone help me out?

-Aura

[FaT3oYCG]

ok bash rc now looks like what you said

cygwin.bat changed and now path looks like what you said

cygwin.bat

@echo off

C:
chdir C:\cygwin\bin

set PSPDEV=/usr/local/pspdev
set PSPSDK=$PSPDEV/psp/sdk 
set PATH=/usr/local/pspdev/bin

bash --login -i

.bashrc

export PSPDEV=/usr/local/pspdev
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/local/pspdev/bin:/$
set PSPDEV=/usr/local/pspdev
set PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/local/pspdev/bin:/usr$

echo's

[email protected]@craigs_computer ~
$ echo $PSPDEV
/usr/local/pspdev

[email protected]@craigs_computer ~
$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/local/pspdev/bin:/usr/lib/lapac
k

[email protected]@craigs_computer ~
$

- running ./toolchain.sh now

please tell me if its still wrong

[Waterbottle]

I made a simple code to load a 24 bit uncompressed BMP into memory, it works perfectly on my computer but on the PSP it crashes for some reason.

bool Image::loadBMP( const char *path )
{
     FILE *fp = fopen( path, "r" );
     if( fp == NULL ) return false;
     char header[54];
     fread( header, 54, 1, fp );

     // BMP identifier
     if( *(short*)&header[0] != 19778 )
     {
         fclose( fp );
         return false;
     }


     width = *(unsigned int*)&header[18]; // It crashes here!


     height = *(unsigned int*)&header[22];
     data = (unsigned char*)malloc( width*height*3 );
     
     fseek( fp, *(unsigned int*)&header[10], SEEK_SET );
     fread( data, width, height*3, fp );
     fclose( fp );
     return true;
}

width is declared as an unsigned int in the public scope of the class.

[Auraomega]

How would I use sctrlKernelExitVSH? I've attempted using it on 3.52 and it just keeps rebooting with the normal pspbtcnf.bin file, and not the custom one I've made, my code is this:

struct SceKernelLoadExecVSHParam param;
    memset(&param, 0, sizeof(param));
    param.size = sizeof(param);
    param.configfile = "/kn/pspbtcnf_P4.bin";
    
    int check = sctrlKernelExitVSH(&param);

but this just reboots and restarts it like normal, I've tried switching kn to kd, and the bin file to a txt file (incase it works like the old pspbtcnf files), but its not helped at all. Theres very little source code with this command in use, so I can't compare and see what I'm doing wrong, so if anyone knows could you point out my error please?

Thanks.
-Aura

[Raphael]

I made a simple code to load a 24 bit uncompressed BMP into memory, it works perfectly on my computer but on the PSP it crashes for some reason.

     if( *(short*)&header[0] != 19778 )
...
     width = *(unsigned int*)&header[18]; // It crashes here!
...
     height = *(unsigned int*)&header[22];
...
     fseek( fp, *(unsigned int*)&header[10], SEEK_SET );

GCC has problems compiling such code into correct assembly instructions for PSP (or MIPS in general?) [well, actually it sometimes just puts the instructions in wrong order]. Also, you're trying to read an int from an offset that is not word aligned (18, 22 and 10), which will result in a bus error.
Avoid such pointer 'magic' and do proper casts. If you need to read ints (or shorts) from unaligned addresses, read it byte for byte and connect the single bytes to the wanted data type. Yes, PSP programming is sometimes a pain.
Alternatively you could just create a packed struct with the header information and read it in one go. In that case the compiler would take care of the unaligned reading.

PS: That's one of the reasons why everyone knowing about PSP programming suggests beginners to NOT start with PSP programming, but start with coding for PC. Just a generic note, not aimed at you.

[Grimfate126]

Is there a code profiler available for the PSP? is not, how would i go about making one? the articles ive read are platform dependent (as they should be, but that leave the PSP with nothing)

[Raphael]

pspsdk\src\samples\debug\ profiler
and
gprof do it's job
http://www.cs.utah.edu/dept/old/texinfo/as/gprof.html

[ZereoX]

Hi,Im just trying to learn C++ and as I go on I would like to make a little game for my personal learning and add my knowledge to this game as I progress but It its good to start something out of bad basis.So here is my Code please help me to get it sort out:

Main.c:

Spoiler for Main:

#include <pspkernel.h>
#include <pspdisplay.h>
#include <pspctrl.h>
#include "graphics.h"

PSP_MODULE_INFO("Star Shooter", 0, 1, 1);

#define RGB(r, g, b) ((r)|((g)<<8)|((b)<<16))

/* 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 main(void) {
    SetupCallbacks();
    initGraphics();

    SceCtrlData pad, lastpad;

    sceCtrlReadBufferPositive(&lastpad, 1);
    
    int x = 0;
    int y = 0;
    
    Image* Background;
    Background = loadImage("./Images/Background.png");
    Image* PlayerI;
    PlayerI = loadImage("./Images/PlayerI.png");
    


    while(1) {
      sceCtrlReadBufferPositive(&pad, 1);

      if(pad.Buttons != lastpad.Buttons) {
      lastpad = pad;

      if(pad.Buttons & PSP_CTRL_LEFT)
      {
       x = x - 2;
      }
      if(pad.Buttons & PSP_CTRL_RIGHT)
      {
       x = x +2;
      }
      if(pad.Buttons & PSP_CTRL_UP)
      {
       y = y - 2;
      }
      if(pad.Buttons & PSP_CTRL_DOWN)
      {
       y = y + 2;
      }
      
      blitAlphaImageToScreen(0, 0 , 480, 272, Background, 0, 0);
      blitAlphaImageToScreen(0, 0 , 32, 32, PlayerI, x, y);
      
      }
    
    sceDisplayWaitVblankStart();
    flipScreen();

    }
    sceKernelSleepThread();
    return 0;
}

Makefile:

Spoiler for Makefile:

TARGET = StarShooter
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
LDFLAGS =

EXTRA_TARGETS = EBOOT.PBP
PSP_EBOOT_TITLE = Star Shooter

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

Here are all my files:
http://zereox.googlepages.com/StarShooter.rar

Thanks again.

[eldiablov]

What is there to sort out ? There's barely any code minus the callbacks.

[Grimfate126]

pspsdk\src\samples\debug\ profiler
and
gprof do it's job
http://www.cs.utah.edu/dept/old/texinfo/as/gprof.html

holy crap. thats easier than i thought..

[ZereoX]

eldiablov I know but The think is that it compiles but simply doesn't work.

[Raphael]

eldiablov I know but The think is that it compiles but simply doesn't work.

"Doesn't work" is as helpful as an refrigerator on the north pole. Learn to properly articulate the exact problem you have and you will get help much sooner the next time.
Your program has two major issues:
1. You are only blitting your images at the exact time a button has been pushed or released, hence you will only see something starting from when the first such event occured.
2. You infinitely loop your main loop, preventing your application from ever exiting (even when home button is pressed). Put a breaking case into your loop.
If you don't know what to do, try the search function as this is a common problem.

[ZereoX]

OK thanks Raphael, I got it fix. Everything works but I don't really understand number 2 I just know that I am able of exiting using the home key.Care to explain a bit more please I'm no so sure to understand the principle behind Infinite loops.

[Slasher]

Ignore Raphael about the infinite loop thing.
Even though your program does have an infinite loop - you've set up the callback thread. No matter what your program is doing, you have the option of exiting thanks to the callback thread.
The callback thread ( SetupCallbacks; ) is essentially the home button exiting.

As for an infinite loop explanation - basically imagine a loop as reading your code from top to bottom, then going back to the top again.

while(1)
{
// Code
}

Now imagine this happening without some way of exiting the loop.

while(1)
{
// Code
}

// Some more code

Your program will never be able to reach 'some more code' without somehow exiting the loop its currently in. You can break the loop and move on with

break;

[ZereoX]

Ok thanks.But as you might see might controls are in a loop if I break and go on i won't be able to move anymore.I either Build everything into that loop or is there a other way?

[Slasher]

Ok thanks.But as you might see might controls are in a loop if I break and go on i won't be able to move anymore.I either Build everything into that loop or is there a other way?

pretty much