8051 frequncy meter - help with asm code needed

[osoenbolsa]

frequncy meter

I need to find the frequency of a wave that does not oscillate between 0 and Vcc.....(hence no use of programmed interrupt for level detection) how do i find the frequency of the wave in this case?

I use the 80c517 a/d converter.

I need help with the asm code.

Thank all

 

[Tajinder Singh]

Re: 8051 frequncy meter

if your freq is not oscillating between 0 and VCC, the best way is to convert the wave to this level and better use interrupts and timers, for fixed time window.

to convert it to reqd. level you can use schmit trigger ckts.