hi, i am using PSOC 5.2, using kit number CY8C29466-24SXI. i am trying to capture a time input pulse, i just want to know which timer will be great for that project to capture the time period between every rising or falling edge and if anyone has any examples that will be great

Thanks

First you must estimate the longest time between the two low-to-high transitions of your input you still want to measure.

Together with your wanted resolution you can calculate

1. Your needed input frequency (should be generated with a timer or PWM)

2. The width of your counter (8, 16 or 32bit)

Then you may use a timer with the capture-input connected to your signal to measure.

Have a look in the timer-datasheet for the example code.

Bob 

i Used TachTimer16, i will use the function generator for now, to monitor the timer input and compare the output frequency=RPM.

i attached the file, i have the basic code and i get nothing in the output.

I would recomend to use a timer to generate the clock for your tach-timer and not use 32k - frequency without a x-tal. It is easier to adapt the frequency to your needs during the development phase.

Changed a bit in your project-file, hope it works

Bob

i still dont understand how i find the width of the period, between every rising edge!!?

This may be a better reference -

http://www.cypress.com/?id=4&rID=58479

Or reqwuest the data at this link -

http://www.cypress.com/index.cfm?rID=38720

Regards, Dana.

Although this is PSOC 1 also a good reference.

http://www.cypress.com/?rID=2671

Regards, Dana.

You are using PSOC 1, just re-read the original post. So use this reference -

http://www.cypress.com/?rID=2671

Regards, Dana.