AVR Downloader/UploaDEr - Bugs: bug #44171, Clarify Documentation on signal...
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bug #44171: Clarify Documentation on signal polarity
Submitter: | Volker <funker211> | ||
Submitted: | 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: |
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Corresponding source code
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.