URL:
<http://savannah.nongnu.org/patch/?7244>
Summary: TPI bitbang implementation
Project: AVR Downloader/UploaDEr
Submitted by: geekman
Submitted on: Thu 15 Jul 2010 04:30:05 PM GMT
Category: None
Priority: 5 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
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Details:
I have implemented the TPI protocol for serial bitbang programmers.
The code requires some work, so I'm posting what I have here. Please do let
me know what changes need to be made so I can clean it up.
The first logical step was to implement pgm->cmd_tpi() for the serialbb
programmer.
Code added in avr.c should somehow use the OPCODE structs, but I'm not sure
what's the best way to change it since the read & write opcode do not contain
the address but rely on a separate set-address opcode. Another opcode that's
out of place is the SKEY instruction, which requires an operand of 8 bytes.
This definitely cannot fit into the 32-bit "instruction format" defined.
The serialbb also does not implement a paged_load function, but TPI is faster
when reading in blocks, therefore the code was inserted in avr_read &
avr_write.
Constants in tpi.h (there is no tpi.c) should be somehow moved into the
AVRPART struct, but TPI has so far been in a single product line, the
ATtiny4/5/9/10 which share the same I/O addresses.
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File Attachments:
-------------------------------------------------------
Date: Thu 15 Jul 2010 04:30:05 PM GMT Name: avrdude-tpi-bb.patch Size: 18kB
By: geekman
Initial patch
<http://savannah.nongnu.org/patch/download.php?file_id=20985>
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