calculating time delay for 89c51 mcu

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how to calculate delay in 89c51 using c

hi there i need to calculate exact time delay for microcontroller AT89C51. for serial communication i use 9600 baud rate and timer 1 in mode 2, and 11.0592 MHz crystal. i need to know that using the c language how much loop factor should i give to obtain exact 1sec delay.i mean for(x=1, x<=y),,, value of y?
is there any formula.. or some thing like this.
 

how to calculate baud rate in 89c51

it depends on your controller clock cycles.

1 instruction 2 cycles
like that
 

mcu c language delay

This topic has been discussed here for several times ..
It's just the matter of using SEARCH ..
Here is one example:


Regards,
IanP
 

89c51 embedded c book(mazid)

//led blinking after 1 sec
#include <reg51.h>
int count=0;
int val;
void msDelay(int a)
{
TMOD=0x02;
TH0=256-(255/1.085);
TR0=1;
IE=0x82;
val=((a/255)+.9)*1000;
}
void abbas() interrupt 1
{
count++;
if(count==val)
{
P2=~P2;
count=0;
}
}
void main()
{
msDelay(1000);
while(1);
}
 

89c51 timer 1 example

just go through Mazid or Ayala book for detailed timing analysis it will be of great help to you r else go for trail and error basis to get the exact timing during simulation
 

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