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yuan peng Posted
30-May-2005 20:52 Toolset
C51 |  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! | | Read-Only Author
Reinhard Keil Posted
31-May-2005 07:06 Toolset
C51 | RE: use keil c51 for rtx51 tiny Reinhard Keil You need to use the sec value to determine execution times. Another way is the Performance Analyzer.
Reinhard | | Read-Only Author
yuan peng Posted
31-May-2005 20:17 Toolset
C51 | RE: use keil c51 for rtx51 tiny yuan peng Thanks for your answer!
I am a beginer for keil c51, I found my question should be as follows:
when I change the xtal in options, but the time of timer0 which I used not changed. | | Read-Only Author
Reinhard Keil Posted
1-Jun-2005 00:53 Toolset
C51 | RE: use keil c51 for rtx51 tiny Reinhard Keil Sorry, still I do not understand your question. What 'time' did not change? How did you measure this 'time'?
Reinhard | | Read-Only Author
yuan peng Posted
1-Jun-2005 04:01 Toolset
C51 | RE: use keil c51 for rtx51 tiny yuan peng 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);
} | | Read-Only Author
Reinhard Keil Posted
1-Jun-2005 09:48 Toolset
C51 | RE: use keil c51 for rtx51 tiny Reinhard Keil You are running on the simulator. The simulator shows the time in the register window under sec=.
Reinhard | |
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