designing a timer to measure revolution time of a motor at every revolution

[moonlight35]

hello everybody. I have a presentation which is about designing timer to measure revolution time of a motor at every revolution. this is not a design project,this is only a presentation so I just have to talk about it a few minutes.
I have got:
- 1MHz clock input
- an active-high pulse of 100us duration at every motor revolution

and the requirements are:
- motor speed range:1500-6000rpm
- time resolution: 1.0us
- counting restarts at every motor revolution(**this part is the hard one)
- timer will send a 1us interrupt pulse to a microprocessor after each revolution.

hope to hear from somebody as help about this subject.thanks

 

[KMoffett]

When the innterupt goes high the µC transfers a timer count to a register. When the interupt goes low the µC resets the counter and allows it to start counting again. The register retains the last revolution count. Or, something like that.

ken

 

[moonlight35]

thanks ken.I'm gonna discuss this with instructor-at least I have a starting point now
how do values of given information(input clock,active-high pulse) affect this system?

 

[KMoffett]

1MHz clock input

Is this an external input to the microprocessor, or is it the microprocessor's internal clock?

timer will send a 1us interrupt pulse to a microprocessor after each revolution.

Is the timer external to the microprocessor?

A block diagram is a good starting point.

Ken