24lc32a Ext EEPROM

[yym05]

Hello .
I am learnning '24LC32A' that is external EEPROM.
However, something is wrong!
Used 2432.c driver and taking 10k ohm Pull-up both SDL, SCA pin.
Please show me relation sample.
Thanks many.


Compailer Version : 4.023
DEVICE : PIC16F877A

code
///header file

#include <16F877A.h>
#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#FUSES XT //Crystal osc <= 4mhz
#FUSES PUT //Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected

#use delay(clock=4000000)


///source code
#include "bb.h"
#include <LCD.C>
#include <2432.c>

void port_init(){
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);

set_tris_d(0x0f);
}

void write_eeprom_data(long int address, char *string){
while(*string){
write_ext_eeprom(address,*string);
string++;
address++;
}
}

char *read_data="0123456789ABCDEF";
void read_eeprom_data(long int address, char len){
char i=0;

while(len){
read_data[i]=read_ext_eeprom(address);
i++;
len--;
}
read_data[i]=0;
}

void lcd_puts(char *ptr){
char len=0;

while(*ptr){
lcd_putc(*ptr++);
len++;
if(len>15) lcd_gotoxy(1,2);
}
}

void main(){
long int address=0x00;
char *ee_char="Hello World!";

port_init();
lcd_init();
init_ext_eeprom();

lcd_gotoxy(1,1);
lcd_puts(read_data);

while(TRUE){
write_eeprom_data(address,ee_char);
lcd_gotoxy(1,2);
read_eeprom_data(address,16);
lcd_puts(read_data);
}
}
_________________
Yeongmo Yang

[jecottrell]

Yeongmo,

What are A0-A2 connected to on the EEPROM?

They are the address pins. I think if you are using the example code they should be connected to Vss (gnd).

John

[yym05]

It’s already connected.
John. Thanks.
but... As you can see the image, it was connected.
_________________
Yeongmo Yang

[jecottrell]

OK.

Post your code and someone should be able to offer some suggestions.

John

[yym05]

OK
_________________
Yeongmo Yang

[PCM programmer]

1. Post the PIC that you're using.

2. Post your compiler version.

[PCM programmer]

The problem is in vs. 4.023 of the compiler.

In vs. 4.021, they changed the operation of the compiler, as follows:

[yym05]

Thanks many.
_________________
Yeongmo Yang