Need Help Atmega8 timer / Start-Stop on event

[mzdenkov]

Greetings.

I need help in:

Case:

Micro: Atmega 8
Timer event source: TDC1011

I need to start and timer on Event.
Event is change of state on External Pin.

So:

>---START--- [----------------]
                    [                     ]
from TDC      [  OR  GATE    ]------------AVR PINx------>
                    [                     ]
>---STOP-----[----------------]

<--TRIGGER-------------------------------AVR PINx---------
<--RETART--------------------------------AVR PINx----------
<--ENABLE--------------------------------AVR PINx---------



Im using TDC1011 to measure water level in glass.
TDC sends START bit at the begging of measure(here we start the timer) [it sends the ultrasonic signal], when TDC recieves the ultrasonic signal it sends STOP bit(here we stop the timer).

As im new in Timer capture mode, i need help (this is for my collage diploma project).

Best Regards.
Thanks.

[dannyf]

Have you read the data sheet? There are countless ways of doing it.

[mzdenkov]

I did. I understand basic operations with timers, but there is a problem because i mix things between TI(collage lessons) and AVR.
I've read all in Datasheet, but that is not clear enough for me.