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use keil c51 for rtx51 tiny

yuan peng

I change the xtal value in options for target, but the ticks time not change, why?
select use simulator in options for debug.
Thanks for your answer!

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  • 0 in reply to Keil Software Support Intl.

    I use timer0 to control the P1 output, but
    the flash frequency not change as the xtal setting changed.
    I watch the flash in simulator mode.
    Push button "Peripheral" and select "Port0",
    can see the port flash.

    my program is as follows:

    #include <reg51.h>
    #include <stdio.h>

    #define RELOADVALH 0x9e;//3C
    #define RELOADVALL 0x58;//B0

    unsigned int tick_count = 0;

    void main(void) {
    TMOD=(TMOD & 0xf0) | 0x01;
    TR0=0;
    TH0=RELOADVALH;
    TL0=RELOADVALL;
    TR0=1;
    EA=1;
    ET0=1;

    for(;;) {
    P0 = 0;
    }
    }

    void timer0(void) interrupt 1 {
    TR0=0;
    TH0=RELOADVALH;
    TL0=RELOADVALL;
    TF0=0;
    TR0=1;
    tick_count++;
    if (tick_count == 120) {
    tick_count = 0;
    P1 = ~P1;
    }

    //printf("tick_count=%05u\n",tick_count);
    }

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  • 0 in reply to Keil Software Support Intl.

    I use timer0 to control the P1 output, but
    the flash frequency not change as the xtal setting changed.
    I watch the flash in simulator mode.
    Push button "Peripheral" and select "Port0",
    can see the port flash.

    my program is as follows:

    #include <reg51.h>
    #include <stdio.h>

    #define RELOADVALH 0x9e;//3C
    #define RELOADVALL 0x58;//B0

    unsigned int tick_count = 0;

    void main(void) {
    TMOD=(TMOD & 0xf0) | 0x01;
    TR0=0;
    TH0=RELOADVALH;
    TL0=RELOADVALL;
    TR0=1;
    EA=1;
    ET0=1;

    for(;;) {
    P0 = 0;
    }
    }

    void timer0(void) interrupt 1 {
    TR0=0;
    TH0=RELOADVALH;
    TL0=RELOADVALL;
    TF0=0;
    TR0=1;
    tick_count++;
    if (tick_count == 120) {
    tick_count = 0;
    P1 = ~P1;
    }

    //printf("tick_count=%05u\n",tick_count);
    }

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