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Timer in autoload mode

Gayatri Mahapatra

I use Keil sometimes and while using a timer in autoload mode, the TH0 is loaded with the calculated value but TL0 starts incrementing from 00 instead of the calculated value F0.Am I missing something while using or configuring the keil simulator?

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  • 0 in reply to ²erik malund

    "show some actual, complete, indented, commented code"

    his code is actual and complete, sufficient to get you to his "problem", as is.

    but here is his code presented in a nicer way, per your request.

    #include <reg51.h>

void delay();
sbit mybit = P1^5;

main()
{
        while(1)
        {
                mybit = mybit^1;
                delay();
        }
}

void delay()
{
        TMOD = 0x02;
        TH0 = 0xF0;
        TL0 = 0xF0;
        TR0 = 1;
        while (TF0==0);
        TR0 = 0;
        TF0 = 0;
}

Reply
  • 0 in reply to ²erik malund

    "show some actual, complete, indented, commented code"

    his code is actual and complete, sufficient to get you to his "problem", as is.

    but here is his code presented in a nicer way, per your request.

    #include <reg51.h>

void delay();
sbit mybit = P1^5;

main()
{
        while(1)
        {
                mybit = mybit^1;
                delay();
        }
}

void delay()
{
        TMOD = 0x02;
        TH0 = 0xF0;
        TL0 = 0xF0;
        TR0 = 1;
        while (TF0==0);
        TR0 = 0;
        TF0 = 0;
}

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