need eeprom sample program

[jelodavid]

Hello all!,
Pls. help me on how to save and retrieve contents of eeprom. A very short example for a newbie would be very helpful. I just want a very simple program, for example a counter saved to internal eeprom then it can be retreive later and displayed to lcd.

I'm using PIC16F876 and pcwh 3.212

[Mark]

Plenty of examples have been posted. Try using the search feature and see what you can come up with. If you have problems, then post your code and we can help. No one is probably going to write the program for you.

[jelodavid]

Here's my sample program, but it doesn't work



#include <16F876.h>
#device adc=8
#use delay(clock=16000000)
#fuses NOWDT,XT, NOPUT, NOPROTECT, NOBROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG


#include <PICDEM2PLUS_LCD.h>
#include <string.h>
#include <internal_eeprom.c>


#byte porta = 5
#byte portb = 6
#byte portc = 7

#define save PIN_B7
#define recall PIN_B6
#define select PIN_B5
#define wrt_comp PIN_B1

#define memory 10

long count=0;
byte display=0;

#int_RB
RB_isr()
{

}

#int_TIMER0
TIMER0_isr()
{

}

#int_EEPROM
EEPROM_isr()
{
output_high(wrt_comp);
delay_ms(200);
output_low(wrt_comp);

}
// I/O bit configs and hardware initialization
void on_init()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_256);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);

enable_interrupts(INT_RB);
enable_interrupts(INT_TIMER0);
enable_interrupts(GLOBAL);

set_tris_a(0b11111); //set portA as input
set_tris_b(0b11110001);
set_tris_c(0b11110000);
porta = 0;
portb = 0;
portc = 0;

delay_ms(20);
lcd_init();

lcd_putc("\fWelcome to Power B/E\nAngelo D. Catamco");
delay_ms(500);
delay_ms(500);

display=read_eeprom(memory);
lcd_putc("\fCounter: ");
lcd_gotoxy(10,1);
lcd_putc(display);


}

void on_idle()
{
count++;
printf(lcd_putc,"\fCounter: %lu ",count);

delay_ms(100);


}


void main()
{
on_init(); // initialized hardware

for(;;) // forever loop
{

if (input(save))
{
write_eeprom(memory,count);
delay_ms(50);

delay_ms(100);
}

else if (input(recall))
{
/ display=read_eeprom(memory);
lcd_putc("\fCounter: ");
lcd_gotoxy(10,1);
lcd_putc(display);

delay_ms(100);
}

else if (input(select))
on_idle();

}



}

[PCM programmer]

See the 2nd post in the following thread for an example of reading
and writing to the internal eeprom:
http://www.ccsinfo.com/forum/viewtopic.php?t=17590

[Mark]

Read through the code to see what I corrected:

[jelodavid]

thanks for very big help!. Is there any way to save a 16 bit or 32 bit wide to internal eeprom?

[Mark]