Problem with ds1302

[ferrarilib]

hallo i have problem with ds1302 give to me always 1:1:1

my code is this:

#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=8000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

#include <DS1302.C>



BYTE day=1,mth=2,year=3,dow=4,hour=5,min=6,sec=7;
//bcd def
const unsigned int conv[16] = {
0,10,20,30,40,50,60,70,80,90,90,90,90,90,90,90 };

#define fromBCD(x) ((x & 0xf)+conv[(x>>4)])
unsigned int toBCD(unsigned int val)
{
int ctr;
for (ctr=0;ctr<10;ctr++)
{
if (val == conv[ctr])
return(ctr<<4);
else if (val < conv[ctr]) break;
}
--ctr;
return((val-conv[ctr])+(ctr<<4));
} // end bcd def

byte get_bcd() {
char first,second;

do {
first=getc();
} while ((first<'0') || (first>'9'));
putc(first);
first-='0';

do {
second=getc();
} while ((second<'0') || (second>'9'));
putc(second);

return((first<<4)|(second-'0'));
}

void set_clock()
{

puts("Year 20: ");
year=get_bcd();
puts("Month: ");
mth=get_bcd();
puts("Day: ");
day=get_bcd();
puts("Weekday 1-7: ");
dow=get_bcd();
puts("Hour: ");
hour=get_bcd();
puts("Min: ");
min=get_bcd();
puts("sec");
sec=get_bcd();

printf("\n\r %2d,%2d,%2d, %2d um %2d:%2d\n",fromBCD(day),fromBCD(mth),fromBCD(year),fromBCD(dow),fromBCD(hour),fromBCD(min));

rtc_set_datetime(day,mth,year,dow,hour,min);

printf("\n\r clock setup");
}

void get_clock()
{
rtc_get_time(hour,min,sec);
printf("\n\r...%2d:%2d:%2d...\n",fromBCD(hour),fromBCD (min),fromBCD(sec));

}


void main()
{

setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
rtc_init();

printf("\n\r...start...\n");

set_clock();

do {

get_clock();
delay_ms(1000);
get_clock();

} while (TRUE);
} //end main


i have tired cange chip too but always 1:1 :1

i have connect so :
#define RTC_SCLK Pin_A2
#define RTC_IO Pin_A3
#define RTC_RST Pin_A4

but nothing works

there is sameone that can help me ?

Thanks..

[PCM programmer]

Have you tried to use the CCS example file, EX_RTCLK.C with
the ds1302 driver file DS1302.C ?

The example file is in this folder: c:\Program Files\Picc\Examples

I suggest that you get it working first with the CCS example file,
and then try your own code.

[ferrarilib]

i dont can try with this example because i dont have keyboard in a pic..

[ferrarilib]

ok i have tired with manual set day,mth,year,dow,hour,min but output is always 01:01:01
in the date and in the time ..
I think that is a comunicate problem !

my set is :
Pic ds1302

A2------> 7
A3------> 6
A4------> 5
2---> XL 32,768
3--->none
1---->+5v
8---->+3,3 Batt



but need in A4 a resistor to Vcc ?

[ferrarilib]

Now works fine but with ressistor of 1,5K vcc---> A4

But why need this resistor for works ?

[PCM programmer]

[ferrarilib]