AVR Downloader/UploaDEr - Bugs: bug #7383, Hardware shortcut using KANDA...
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bug #7383: Hardware shortcut using KANDA STK200 compatible ISP cable
Submitter: | None | ||
Submitted: | Thu 22 Jan 2004 05:44:06 PM UTC | ||
Category: | None | Severity: | 3 - Normal |
Priority: | 5 - Normal | Item Group: | None |
Status: | Wont Fix | Privacy: | Public |
Assigned to: | joerg_wunsch | Originator Name: | Lore |
Originator Email: | -email is unavailable- | Open/Closed: | Closed |
Release: | None | Programmer hardware: | |
Device type: |
Sat 17 Sep 2005 07:26:24 PM UTC, comment #1: |
Joerg Wunsch <joerg_wunsch> |
Thu 22 Jan 2004 05:44:06 PM UTC, original submission:
I'm using an KANDA STK200 compatible ISP cable (see attached file) with AVRDUDE 4.2.0
|
Anonymous |
Depends on the following items: None found
Items that depend on this one: None found
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Follow 6 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2005-09-17 | joerg_wunsch | Status | None | Wont Fix | |
Assigned to | None | joerg_wunsch | |||
Originator Name | Lore | ||||
Originator Email | -email is unavailable- | ||||
Open/Closed | Open | Closed | |||
2004-01-22 | None | Attached File | - | Added isp.gif, #986 |
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Corresponding source code
The logic in par.c is set to immediately drive the /RESET
line as soon as the buffer's /CS is activated, so the window
where the buffer could potentially drive two active outputs
against each other is in the range of nanoseconds which
should be bearable (the worst effect is probably a spike in
the power supply). Further, if you use MISO/MOSI for regular
IO that might conflict with ISP, it's always recommended to
have some small series resistors in these lines.
As the originator left no email address or other option to
get in contact with him, left no patch implementing a
suggested solution to the alleged problem, and rearranging
the code would be quite a bit of work, I'm closing this bug
as a "won't fix".