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[avr-chat] using input capture on tiny2313

From: Bjarne Laursen
Subject: [avr-chat] using input capture on tiny2313
Date: Tue, 08 Mar 2005 08:55:34 +0100
User-agent: Mozilla Thunderbird 0.7.3 (Windows/20040803)

I am developing a modem for the tiny2313 and I would like to use the input capture of timer1. I wan't to record any change of the the input, so in each interrupt I will be inverting the edge bit, ICES1. The datasheet state that, after doing this I must clear any pending capture interrupts. I can't see why this is nessesary. If the ICES1 bit is xor'ed with the input, there will not be generated any extra interrupts at this point. Actually I would like an interrupt to be generated if the input has already changed back.

My hardware is not ready yet, so can't try it out. Also, I don't like trial and error, escpecially not when it goes against the datasheet. The datasheet does not clearly state that the ICES1 bit goes into an xor-gate.

Do you have any experience with that ?

-Bjarne Laursen, Rose Technology A/S, Denmark

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