now we have used :
void serial(unsigned int sec1)
so basically it compiled but when we interface, it shows smiley faces, hearts, and clubs and random characters, so how do we read the time out of it.
this is our final main code that complied:
#include<reg51.h>
#define msec 1
unsigned int sec1,sec2;
int sec1_1,sec1_2,sec2_1,sec2_2;
unsigned int digi_val[10]={0x40,0xF9,0x24,0x30,0x19,0x12,0x02,0xF8,0x00,0x10};
sbit dig_ctrl_1=P1^0;
sbit dig_ctrl_2=P1^1;
sbit dig_ctrl_3=P1^2;
sbit dig_ctrl_4=P1^3;
sbit start_pin = P1^4;
sbit stop_pin = P1^5;
sbit reset_pin = P1^6;
int s,t;
void mplex_delay(unsigned int time)
{
int i,j;
for (i=0;i<=time;i++)
for(j=0;j<=50;j++);
}
void digi_out(unsigned int current_num)
{
P2=digi_val[current_num];
mplex_delay(msec);
}
void display(unsigned int dig1,unsigned int dig2)
{
sec1_2=dig1%10;
sec1_1=dig1/10;
sec2_2=dig2%10;
sec2_1=dig2/10;
TMOD=0x01;
TL0=0xFF;
TH0=0xDB;
TR0=1;
while(TF0==0)
{
dig_ctrl_1 = 1;
dig_ctrl_2 = dig_ctrl_3 = dig_ctrl_4 = 0;
digi_out(sec1_1);
dig_ctrl_2 = 1;
dig_ctrl_1 = dig_ctrl_3 = dig_ctrl_4 = 0;
digi_out(sec1_2);
dig_ctrl_3 = 1;
dig_ctrl_2 = dig_ctrl_1 = dig_ctrl_4 = 0;
digi_out(sec2_1);
dig_ctrl_4 = 1;
dig_ctrl_2 = dig_ctrl_3 = dig_ctrl_1 = 0;
digi_out(sec2_2);
}
TR0=0;
TF0=0;
}
void serial(unsigned int sec1)
{
TMOD = 0x20;
TH1 = 0xFD;
SCON = 0x50;
TR1 = 1;
while (1)
{
SBUF = sec1;
while(TI==0);
TI = 0;
}
}
void serial1_1(unsigned int sec2)
{
TMOD = 0x20;
TH1 = 0xFD;
SCON = 0x50;
TR1 = 1;
while (1)
{
SBUF = sec2;
while(TI==0);
TI = 0;
}
}
void main()
{
while(1)
{
start:
start_pin = 1;
stop_pin = 1;
reset_pin = 1;
dig_ctrl_1 = 0;
dig_ctrl_2 = 0;
dig_ctrl_3 = 0;
dig_ctrl_4 = 0;
P2 = 0xFF;
s = t = 0;
while(start_pin == 1)
{
display(0,0);
}
stopwatch:
for (sec1=s;sec1<=99;sec1++)
{
if (stop_pin == 0 )
break;
for (sec2=t;sec2<=99; sec2++)
{
if (stop_pin == 0 )
break;
t=0;
display(sec1,sec2);
}
}
stop_pin = 1;
s = sec1;
t = sec2;
while (stop_pin = 1 && reset_pin != 0 )
{
serial(sec1);
serial1_1(sec2);
}
while ( start_pin != 0 && reset_pin != 0 )
{
display(sec1,sec2);
}
if (start_pin == 0)
{
goto stopwatch;
}
else
{
if (reset_pin == 0 )
{
s = t = 0;
goto start;
}
}
}
}