Help with C programming - Programmers Heaven

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Categories

Welcome to the new platform of Programmer's Heaven! We apologize for the inconvenience caused, if you visited us from a broken link of the previous version. The main reason to move to a new platform is to provide more effective and collaborative experience to you all. Please feel free to experience the new platform and use its exciting features. Contact us for any issue that you need to get clarified. We are more than happy to help you.

Help with C programming

sgtomsgtom Posts: 3Member
Dear All,

I would like the times to be sent to accumulator register when i press stop button.

how do i go about writting a code in C for that?

I just need the times to be stored in some register and move it to the SBUF register so we can send the times serially.

Please help.

Kindly find my original code below:

#include
#define msec 1
unsigned int sec1,sec2;
int sec1_1,sec1_2,sec2_1,sec2_2;

unsigned int digi_val[10]={0x40,0xF9,0x24,0x30,0x19,0x12,0x02,0xF8,0x00,0x1 0};
sbit dig_ctrl_1=P1^0; // Declare the control pins of seven segments
sbit dig_ctrl_2=P1^1;
sbit dig_ctrl_3=P1^2;
sbit dig_ctrl_4=P1^3;
sbit start_pin = P1^4; // Start pin to start the watch.
sbit stop_pin = P1^5; // Stop pin to stop the watch.
sbit reset_pin = P1^6; // Reset pin to reset the watch.
int s,t;

void mplex_delay(unsigned int time) // Function to provide a time delay of approximatelty one second using Timer 1
{
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) // Function to display the digits on seven segmnet. For more details refer seven segment multiplexing.
{
sec1_2=dig1%10;
sec1_1=dig1/10;
sec2_2=dig2%10;
sec2_1=dig2/10;
TMOD=0x01; //Enable Timer 0
TL0=0xFF;
TH0=0xDB;
TR0=1; // Triger Timer 0
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 main()
{
while(1)
{
start: // Segment to start the stop watch
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)// Check if start pin is pressed
{
display(0,0);
}

stopwatch: // Segment to stop the watch
for (sec1=s;sec1<=99;sec1++)
{
if (stop_pin == 0 ) //Check if stop pin is pressed
break;
for (sec2=t;sec2<=99; sec2++)
{
if (stop_pin == 0 ) //Check if stop pin is pressed
break;
t=0;
display(sec1,sec2);
}
}
stop_pin = 1;
s = sec1;
t = sec2;

while ( start_pin != 0 && reset_pin != 0 ) //Check if start pin or reset pins are not pressed
{
display(sec1,sec2);
}

if (start_pin == 0) //Check if start pin is pressed
{
goto stopwatch;
}
else
{
if (reset_pin == 0 ) //Check if reset pin is pressed
{
s = t = 0;
goto start;
}
}
}
}
Sign In or Register to comment.