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How to call a function after a specific clock period

Micro Club

hi
I am using 89c51. for using serial port I am using these commands

SCON  = 0x50;                  /* SCON: mode 1, 8-bit UART, enable rcvr    */
TMOD  = 0x20;                  /* TMOD: timer 1, mode 2, 8-bit reload      */
TH1   = 0xfd;                  /* TH1:  reload value for 9600 baud         */
TR1   = 1;                     /* TR1:  timer 1 run                        */

these are working correctly
------------
but in main function i am calling 2 functions

for example
---------------------

void main()
{
    while(1)
    {
        if(RI)
        {
            GetData();
        }
        if(??????????)
        {
            DisplayData();
        }
    }
}


At the location "??????????" I want to call the DisplayData() after a specific clock period, for example after every 1000 clocks. is it possible to set the timer0 of 89c51 for this purpose.

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