bugAVR Downloader/UploaDEr - Bugs: bug #44171, Clarify Documentation on signal...


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bug #44171: Clarify Documentation on signal polarity

Submitted by:  Volker <funker211>
Submitted on:  Tue 03 Feb 2015 11:33:13 AM UTC  
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  funker211
Open/Closed:  Open Release:  None
Programmer hardware:  Device type: 

Tue 03 Feb 2015 11:33:13 AM UTC, original submission:

In the avrdude.conf(.in) file, it says that pin polarity can be inverted with a preceeding tilde (~) character.

Yet, standard polarity is not defined (or not clearly documented). For example, an AVR usually requires an active low reset signal. All avrftdi type programmers simply assign "reset = 3;". Now, is that an active high or active low signal? Somewhere, it should be stated what signal polarity actually is. Does "reset = 3;" mean that the reset is high active? Or does it mean it is (usually) active low and should I need an active high reset, I need to invert this by writing "reset = ~ 3;"?

Secondly, the file states that a space is required after the tilde. Yet, in the file and in the documentation, there are examples where this is omitted. Is a space REQUIRED or not?

I think the documentation really needs an update here, both in the manual AND in the avrdude.conf.in file.

Volker <funker211>


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