URL:
<http://savannah.nongnu.org/bugs/?37812>
Summary: STK500V2 not programming "blank" pages when not
erasing flash (-D)
Project: AVR Downloader/UploaDEr
Submitted by: simonls
Submitted on: Sun 25 Nov 2012 08:57:46 PM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name: simonls
Originator Email:
Open/Closed: Open
Discussion Lock: Any
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Details:
I tried to debug a flash issue by "erasing" the Flash via programming it full
of FF's. In the Mega2560/stk500v2 world, the "chip erase" is skipped and
pages are erased as they are programmed. However AVRDUDE appears to skip
programming pages that are full of FFs.
I think the culprit is the stk500v2_is_page_empty which perhaps should return
0 always if the "-D" flag is given? Although I can understand wanting the
efficiency of not programming "blank" data, it seems even worse to end up with
a Flash that doesn't match the obj file.
I imagine this could be a problem for anyone that has a dataset including 256
bytes of FF (which maybe now more likely in the 128/256KB Mega devices)
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