URL:
<http://savannah.nongnu.org/bugs/?29108>
Summary: Automatic reset (DTR / RTS toggling) fails for
"arduino" programmer type under Linux.
Project: AVR Downloader/UploaDEr
Submitted by: mellis
Submitted on: Sun 07 Mar 2010 05:54:36 PM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name: David A. Mellis
Originator Email:
Open/Closed: Open
Discussion Lock: Any
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Details:
The automatic reset that the "arduino" programmer type should perform before
uploading fails (for some boards) under Linux. The code generates a rising
edge, rather than the falling edge needed for the reset to occur. This is
because the ser_set_dtr_rts() function in ser_posix.c is backwards, setting
the lines when they should be cleared and vice-versa. See patch #7100:
https://savannah.nongnu.org/patch/?7100 for a fix.
(The problem doesn't manifest in Mac OS X because the operating system
automatically lowers the lines when the serial port is opened, generating a
reset.)
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