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Re: [avr-libc-dev] _delay_us() - Documentation for maximum possible dela
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From: |
Joerg Wunsch |
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Subject: |
Re: [avr-libc-dev] _delay_us() - Documentation for maximum possible delay |
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Date: |
Mon, 4 Oct 2010 12:58:54 +0200 |
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User-agent: |
Mutt/1.5.20 (2009-06-14) |
As Boyapati, Anitha wrote:
> I am trying to see what factors influenced to go for a 16-bit
> counter in one case and only 8-bit counter in the other. Why not
> 16-bit counter for both?
_delay_loop_2 has a coarser granularity (4 ticks vs. 3 for
_delay_loop_1).
Basically, both these functions were introduced as "convenience
wrappers" for _delay_loop_1 and _delay_loop_2, respectively, to
make it easier for people to calculate the delay timing.
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)