help in my project

[znos]

i want to write a psp plugin to check your battery percentage and equivalent time while playing a game.
i'm very new to writing programs to a psp.. but i have lots of experience in programming...

my question is how do i get the psp's battery percentage and it's equivalent time?

i got this so far:
 

Code:

#include <pspkernel.h>
#include <psppower.h>
#include <pspdebug.h>

PSP_MODULE_INFO("Hello World", 0, 1, 1);

#define printf pspDebugScreenPrintf

/* 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() {

pspDebugScreenInit();
SetupCallbacks();
printf("Battery Remaining: %i (%i)\n", scePowerGetBatteryLifePercent(), scePowerGetBatteryLifeTime());
printf("Battery Temperature: %i\n", scePowerGetBatteryTemp());
printf("Battery Voltage: %i", scePowerGetBatteryVolt());
sceKernelSleepThread();
return 0;
}

it won't compile.. i have installed psptoochain and got other projects to run.. but this one says "undefined referece to scePowerGetBatteryLifePercent"

[mowglisanu]

post your makefile

[znos]

it's ok.. i've managed to get it to work..

my other question is this: i'm planning to make it as a plugin, how do i print something kind of like the vsh menu style of printing when i press a certain key combination let's say L+R+Select

[mowglisanu]

Do you mean like when a game fails to load and you get a message, or just plain text?
Try searching for vshblitter it might give you an idea of what to do

[znos]

thanks..

just plaintext..

EDIT:
====
i can now blit the string that i want.. now this is my problem:

how can i blit a string while playing a game? i've searched in google and found someone talking about devhook.. what is devhook? and can anyone point me out to an example of a devhook?