Program Code for at89c2051 and 555

[narindia16]

Hello Friends,

I am doing a small project using AT89c2051. I have done all and project is working fine. Program code is in C. I just want to add a 555 timer ic with it. I googled about its working but unable to get its pulse value. I have used a variable register with 555. I have connected pin 2 of 555 with Txd (P3.1) of 89c2051 and pin 9 (P3.6) of 2051 with pin 3 of 555.

Please send me code in c how to read pulse value of 555. I need this code urgenly.

 

[ckshivaram]

Its interrupt routine to read the clock pulse from 555. You can develop interrupt code easily

 

[narindia16]

Thanks for your reply. i am having idea of it.. can you tell me how to calculate pulse value in intruppt?? or i will be very thankful to you if you could send me some lines of code

 

[narindia16]

No reply??? please reply friends..........i need it urgently....... please

 

[arun_9998]

can i help u
arun sharma ,india +919829147145
#include<reg51.h>
static bit x;
void delay_1()
{
while(x==0);
x=0;
}
void delay() interrupt 0 using 0//pin no. 3 of 555 falling edg
{
x=1;
}
void main()
{
EA=0;
EX0=1;
PX0=1;
IT0=1;
EA=1;
while(1)
{
int i;
for(i=1;i<=128;i*=2)
{
P2=i;
delay_1();
}
}
}

 

[welove8051]

i have a project involving ic 555 and s52 at FREE PROJECTS ON HARDWARE(8051) AND SOFTWARE(VB, C,C++,JAVA...). the concept connect the ic 555 pin to any of the timer pin (p3.4 or 5). and use that timer as counter to identify the frequency.

check running led project in that site


regards
kj