first pull /RESET low for a short period of time before enabling the
buffer chip. This sequence allows the AVR to be reset before the
buffer is enabled to avoid a short period of time where the AVR may be
driving the programming lines at the same time the programmer tries
to. Of course, if a buffer is being used, then the /RESET line from
the programmer needs to be directly connected to the AVR /RESET line
and not via the buffer chip.
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appeared in version 2.1.0, but was changed to a 4 byte counter in
version 2.1.1. Reminded by Joerg Wunsch.
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cycle count stored at the end of EEPROM. It seems as though Atmel was
greatly conservative in claiming a 1000 count reliability for the
FLASH. I current have a part that has been reprogrammed 173330 times,
and counting.
Fix a compiler warning.
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bits. Thanks to Joerg Wunsch for tripping over this.
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that it is tracked no matter where the erase was initiated: command
line mode or interactive mode, without code duplicaiton.
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undergone. This utilizes the last two bytes of EEPROM to maintain a
counter that is incremented each time the part is erased.
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Display the correct memory name in an error message (previously
hardcoded).
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overwriting user-modified configs.
Add read/write instructions for all memory types for ATMEGA103,
ATMEGA128, ATMEGA16, and ATMEGA8.
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Fix setting of status LEDs under various write-fail conditions.
Add a flag to indicate that a memory type requires the device to
possibly be powered off and back on after a write to it. This is due
to a hardware problem on some Atmel devices, see:
http://www.atmel.com/atmel/acrobat/doc1280.pdf
Add greater verbosity to the part-display code when verbose>1 to
display avrprog's encoding of the defined programming instructions.
This is primarily for debugging purposes.
Part updates:
* add the AT90S4414 part
* add fuse and lock bit access instructions for the AT90S1200,
AT90S4434, and AT90S8515.
* add the pwroff_after_write flag to the fuse bits for the AT90S2333
and AT90S4433 parts
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Make the BUFF pin a mask like VCC to allow multiple pins to be
asserted at the same time (STK200 has two buffer enable lines).
Add the STK200 programmer.
Fix EEPROM address line selection for several parts.
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a memory type different than the previous one.
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used to make the instruction input more readable in the config file.
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serial programming instructions are not very orthoganal, i.e., the
"read fuse bits" instruction on an ATMega103 is an entirely different
opcode and data format from the _same_ instruction for an ATMega163!
Thus, it becomes impossible to have a single instruction encoding
(varying the data) across the chip lines.
This set of changes allows and requires instruction encodings to be
defined on a per-part basis within the configuration file. Hopefully
I've defined the encoding scheme in a general enough way so it is
useful in describing the instruction formats for yet-to-be invented
Atmel chips. I've tried hard to make it match very closely with the
specification in Atmel's data sheets for their parts. It's a little
more verbose than what I initially hoped for, but I've tried to keep
it as concise as I could, while still remaining reasonably flexible.
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Add support for reading/writing ATMega163 lock and fuse bits.
Unfortunately, in looking at the specs for other ATMega parts, they
use entirely different instruction formats for these commands. Thus,
these routines won't work for the ATMega103, for example.
Add support for sending raw command bytes via the interactive terminal
interface. This allows one to execute any programming instruction on
the target device, whether or not avrprog supports it explicitly or
not. Thus, one can use this feature to program fuse / lock bits, or
access any other feature of a current or future device that avrprog
does not know how to do.
Add in comments, an experimental instruction format in the
configuration file. If this works out, it would allow supporting new
parts and non-orthoganal instructions across existing parts without
making avrprog code changes.
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Brian S. Dean