How to write a code for real time clock for keil software C prog?

[froggy_lim88]

hi,
i'm doing a project to display the real time clock using rabbit board thru Ithernet time. I would like to know how write. i have problem in writing it. thank u.

TF0=0;
TH0=0xf0
TL0=0x5c;
SCON = 0x50; // mode 1, 8-bit uart, enable receiver
TMOD= 0x21; //Turn timer 1 mode 2.
TH1 = 0XFA; // for 9600 baud rate 0XFD


void gettingtime()
{
if(i==0x7f)// Waiting for the 011111111 to come in as a start signal.
{
count3=0;
}
if(count3==87)// after recieved the start signal. wait for 0.2 sec to the the 1st digit.
{
dig4=i;
}
if(count3==125) //second digit.
{
dig3=i;
}
if(count3==250) //Third digit
{
dig2=i;
}
if(count3==312) // forth digit
{
dig1=i;
}

}

 

[alexan_e]

You forgot to mention the mcu you are using

Alex

 

[ckshivaram]

if it is any 8051 generic controller then see this thread
https://www.edaboard.com/threads/170912/
or see my code using p89v51rd2bn controller (8051)

---

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#include<reg51.h>
#include<intrins.h>
 
sbit rs=P0^0;
sbit en=P0^1;
 
sbit sda=P3^6;
sbit scl=P3^7;
 
unsigned char rtc_adr[8]={0x00,0x01,0x02,0x03,0x04,0x05,0x06};
unsigned char rtc_dat[8]={0x20,0x58,0x23,0x05,0x31,0x12,0x03};
unsigned char dis[7]={0x20,0x20,0x28,0x08,0x0c,0x06,0x80};
unsigned char a,b,c,d;
 
void strt_bt();
void stp_bt();
void dta_wr();
void dta_rd(); 
void cmdwrt();
void datawrt();
void delay();
void rtc_wr();
void rtc_rd();
void display();
 
main()
{
int i;
for (i=0;i<7;i++)
{
a=dis[i];
cmdwrt();
delay();
}
 
P0=0x00;
 
for(i=0;i<8;i++)
{
b=rtc_adr[i];
c=rtc_dat[i];
rtc_wr();
}
 
while(1)
{
a=0x80;
cmdwrt();
delay();
 
b=0x04; //date
rtc_rd();
display();
 
a='/';
datawrt();
delay();
 
b=0x05; //month
rtc_rd();
display();
 
a='/';
datawrt();
delay();
 
b=0x06; //yr
rtc_rd();
display();
 
a='-';
datawrt();
delay();
 
b=0x03; //week
rtc_rd();
display();
 
a=0xc0;
cmdwrt();
delay();
 
b=0x02; //hr
rtc_rd();
display();
 
a=':';
datawrt();
delay(); 
 
b=0x01; //min
rtc_rd();
display();
 
a=':';
datawrt();
delay();
 
b=0x00; //sec
rtc_rd();
display();
}
 
}
 
void rtc_wr()
{
strt_bt(); //write
 
a=0xd0;
dta_wr();
 
a=b;
dta_wr();
 
a=c;
dta_wr();
 
stp_bt();
delay();
}
 
void rtc_rd()
{
strt_bt(); //dummy write
 
a=0xd0;
dta_wr();
 
a=b;
dta_wr();
 
strt_bt(); //read
 
a=0xd1;
dta_wr();
 
dta_rd();
 
 
/* sda=1;
scl=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
 
scl=0;
*/
stp_bt();
delay();
}
 
void strt_bt()
{
sda=1;
scl=1;
_nop_();
_nop_();
sda=0;
_nop_();
_nop_();
_nop_();
_nop_();
scl=0;
_nop_();
_nop_();
}
 
void stp_bt()
{
//scl=0;
sda=0;
scl=1;
_nop_();
_nop_();
//_nop_();
//_nop_();
//_nop_();
sda=1;
_nop_();
_nop_();
_nop_();
_nop_();
scl=0;
_nop_();
_nop_();
_nop_();
_nop_();
scl=1;
}
 
void dta_wr()
{
int j;
char m;
m=a;
sda=1;
for(j=0;j<8;j++)
{
a=m;
a=a & 0x80;
if(a==(0x80))
sda=1;
else 
sda=0;
scl=1;
_nop_();
_nop_();
_nop_();
_nop_();
scl=0;
m=m<<1;
}
 
sda=1;
scl=1;
_nop_();
_nop_();
_nop_();
_nop_();
 
scl=0;
delay();
}
 
void dta_rd() 
{
int j;
int c=0,b;
sda=1;
for(j=0;j<8;j++)
{
a=a<<1;
scl=1;
c=sda;
if(c)
b=0x01;
else
b=0x00;
scl=0;
a=a|b;
}
 
sda=1;
//_nop_();
//_nop_();
//_nop_();
//_nop_();
scl=1;
_nop_();
_nop_();
_nop_(); 
scl=0;
//datawrt();
delay();
}
 
void display()
{
d=a;
a=(a>>4);
a=a & 0x0f;
a=a + 0x30;
datawrt();
delay();
 
a=d;
a=a & 0x0f;
a=a + 0x30;
datawrt();
delay();
}
 
 
void cmdwrt()
{
unsigned char s=0;
s=a;
a=a & 0xf0;
a=a>>2;
rs=0;
P0=a;
rs=0;
en=1;
en=0;
a=s;
a=(a<<4);
a=a & 0xf0;
a=a>>2;
rs=0;
P0=a;
rs=0;
en=1;
en=0;
delay();
}
 
 
void datawrt()
{
unsigned char s=0;
s=a;
a=a & 0xf0;
a=a>>2;
rs=1;
//mdata();
//delay();
P0=a;
rs=1;
en=1;
en=0;
a=s;
a=a<<4;
a=a & 0xf0;
a=a>>2;
rs=1;
//mdata();
P0=a;
rs=1;
en=1;
en=0;
delay();
}
 
 
void delay()
{
int i;
for(i=0;i<1000;i++);
}

---

 

[froggy_lim88]

You forgot to mention the mcu you are using

Alex

Hi alex , wht do you mcu? wht is mcu?

---------- Post added at 00:19 ---------- Previous post was at 00:15 ----------

hi,
my hardware is using rabbit board. not i2c hardware

 

[andre_luis]

I´m not sure if Rabbit fammily is suported by KEIL compiler :

List of Chips Supported by Keil

+++

 

[alexan_e]

Hi alex , wht do you mcu? wht is mcu?

A microcontroller (sometimes abbreviated µC, uC or MCU) ...
(source: Microcontroller - Wikipedia, the free encyclopedia)

Alex

 

[bigdogguru]

What model of Rabbit board are you using? 4000, 3000, etc, series?

 

[froggy_lim88]

what model of rabbit board are you using? 4000, 3000, etc, series?

rcm5700-6700um