URL:
<http://savannah.nongnu.org/bugs/?28881>
Summary: nop() macro for NOP instruction
Project: AVR C Runtime Library
Submitted by: soren
Submitted on: Fri 12 Feb 2010 08:14:55 PM GMT
Category: Library
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Header files
Status: None
Percent Complete: 90%
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Release: 1.6.7
Fixed Release: None
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Details:
The special instructions CLI/SEI/SLEEP/WDR each have a convenient macro to
allow their direct use in C.
This patch adds NOP to that list as it can be useful as e.g. a write/read
barrier without any side effects.
util/delay_basic.h as used in the patch may not be the ideal place for it,
but I couldn't find a better, more central place for it in include/avr.
The BREAK instruction added to newer AVR's should probably also have such a
convenience macro added. Again, I am not sure where I think the best place for
it would be or if it should be called something other than just break() to
avoid any confusion with the break keyword.
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File Attachments:
-------------------------------------------------------
Date: Fri 12 Feb 2010 08:14:55 PM GMT Name: delay_basic.h.diff Size: 586B
By: soren
<http://savannah.nongnu.org/bugs/download.php?file_id=19690>
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