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Working backwards....

The BEST place to get information about the 24LC512 is from manufacturer. I just downloaded the Microchip datasheet for their device.

Yes, you can write at any individual a ...

void write_ext_eeprom(EEPROM_ADDRESS locEE, unsigned int8 data)
{
disable_interrupts(global);

unsigned int8 status;

i2c_start(SHARED_STREAM_I2C_EEPROM&# ...

On the smoothing. YES.
Whatever your source, there is always the problem that internally, the chip _will_ draw momentary massively different power levels at nSec timings. This _will_ generate instant ...

some hardware errors from the schematic include
no ground(VSS) to PIC
no power (VDD) to PIC
no power supply bypass caps
no pullup on MCLR
all I/O pins not terminated
no filter caps on PB switch/ ...

Thx for your answer, you were right that was the problem, after initializing these pins with:

output_low(pin_A0);
output_low(pin_A1);
output_low(pin_A2);
outp ...

#byte PORTA = 0x0E22

The compiler has a very nice feature, "getenv" that saves you from looking up the addresses of the special function registers (SFRs). Use it like this:

#byte POR ...

Also, your pushbuttons are wrong. They leave the IOC pins floating
or at +5v. This will not work. The IOC pins must be kept at defined
logic levels. This means a high or a low level, not floatin ...

The program you show us is NOT complete and I seriously doubt it will compile.
Your schematic has several errors and omissions so I conclude you're 'testing' using Proteus ? If so be advised that Pro ...

In the datasheet; every PIC has 100s of pages of 'need to know' information located there.
While there is a 'core' of technology that is common to all, each series or family of PICs have specialty fe ...

Thx for the answer but i wasn't expecting exactly a code working out of the box, i have one example that works what i need is to learn how to ad the very basics aspects, some pseudo code or some tips ...

When the IOC interrupt fires you must read the port in the interrupt routine to reset the interrupt.

that's something I notice some how, but it doesn't even fire one time it just doesn't, how shoul ...

#byte PORTA = 0x0E22

Is that the address of that register? am I correct?

Where do i find those addresses? on the chip datasheet or is found on the chip .h driver?

Excuse me I'm learning.

Check here...
http://www.ccsinfo.com/forum/viewtopic.php?t=26333&highlight=flexkbd

This is a 'flexible' version of the keypad driver. I'm currently using it for a couple of projects. The GREAT ...

Compiler Version 5.070

I'm trying to understand how does the IOC works but the interrupt wont fire.

This is my code

#include <main.h>

#INT_IOC
void IOC_isr(void)
{ ...

The numerical handle is simply the memory address of the port, *8, plus the actual pin number.
So yes, this can be coded, but since there would be 256 possible values, you'd need 256 pins for every ...