_PROTECTED_WRITE (little interposed question)

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poftamunk
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Posted by poftamunk: Fri. Feb 5, 2021 - 06:21 PM
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What is the difference? :

 

_PROTECTED_WRITE(PPP_RRR, XXXXX);
_PROTECTED_WRITE(PPP.RRR, XXXXX);

 

 

The truth is more important than the facts.

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AVR Microcontrollers, megaAVR and tinyAVR, Register
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meolsen
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Posted by meolsen: Fri. Feb 5, 2021 - 06:53 PM
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First uses the "assembler friendly name", the other uses the struct access

:: Morten

 

(yes, I work for Microchip, yes, I do this in my spare time, now stop sending PMs)

 

The postings on this site are my own and do not represent Microchip’s positions, strategies, or opinions.

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Gold Markclawson
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Posted by clawson: Sat. Feb 6, 2021 - 02:12 PM
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Just to point out that this has nothing in particular to do with PROTECTED_WRITE. As Morten says you have a choice when accessing SFRs. The possible advantage of the C/C++ struts is that because registers are grouped you can often pass around just the base address of a register block.

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