Delay program for pic16f1937 using hitech c

R

rems

New Member

• Jul 27, 2012

• #1

how to store delay in a variable using hitech c for pic16f1937.when i
void time (unsigned long int)
_delay(time);
its throwing error: inline delay argument must be constant.
could someone help me to solve this please.
Thanks in advance

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Jul 27, 2012

• #2

Time is declared as a function.. try

Code:

void time( unsigned long x) _delay(x);

I thought the correct syntax for delay was

Code:

__delay_ms(x);
__delay_us(x);

both as int's.

 

R

rems

New Member

• Jul 27, 2012

• #3

__delay_ms(x);
__delay_us(x); this are not working .is it the problem with the complier.

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Jul 27, 2012

• #4

You need to stick

Code:

#define _XTAL_FREQ 4000000

At the beginning to be able to use them.

There needs to be two underscores '_' .

 

R

rems

New Member

• Jul 27, 2012

• #5

i did that,but it is not working .
so i did like this
for (i = 0 ; i < delaytime ; i++)
_delay(10);

now its workling.

i have another problem,i need to send the delay from c# using serial port to c program. could you please tell me how to recive data from c# to c using serial port.

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Jul 27, 2012

• #6

What format id the data in? When you send it from C#, is it in text?

 

R

rems

New Member

• Jul 27, 2012

• #7

i am sending temperture from temperature sensor boerd to pc using serial port. so
first i will send the temperature to pc and the temperatures are displaying in texbox.i have a combo box in which user can select the time ,so tht for example user select 1 min,tempertaure will be displayed in textbox everyone min.

so once the user select the time i need to write that time in serial port and send it .