Remote firmware upgrade failure

[M Cresap]

After several months of successful operation with MCU firmware 3.97,
I attempted to remotely upgrade the firmware from 3.97 to 4.22 using
the latest K3 utility (ver 1.3.11.5).
It failed. The K3 utility had detected a 38400 baud rate, even though
the radio had been set to 19200 baud. The utility could not continue,
but it did manage to disable the remote RS-232 input in the process.
Now the K3 Utility autobaud routine sends hex 3B (semicolon) and
in return usually receives hex 7B (left bracket). Occasionally it will
receive a longer string - something like 7B FF FA 2C 6A 04 FF F0. Once,
while testing for 9600 baud, the K3 utility sent hex 54 42 3B (TB;) which
doesn't make sense.
I have tried cycling power to the K3, then holding the power on pin
(pin 8) of the ACC connector low for 10 seconds as the owners manual
sort of suggests (Manual Rev D5, page 45). (I can't hold down the local
power button - it is many miles away!)
I've tried using Hyperterminal to send semicolons. It consistantly returns the
left

bracket symbol, no matter what speed I set Hyperterminal to.
Sending enter (hex 0D) returns hex 7D.
Anyone have any ideas how to remotely recover the K3's normal operation?
73,
Mike W3IP



     
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[Dick Dievendorff]

Firmware load always occurs at 38400 bps, that's the only speed the K3 bootstrap loader supports. The K3 Utility changes the serial port speed to 38400 bps for firmware load and changes it back after the firmware is loaded. I don't know how your remote access works... Are you running the K3 Utility at a computer near the radio?

Dick, K6KR


On Dec 27, 2010, at 11:44, M Cresap <[hidden email]> wrote:

> After several months of successful operation with MCU firmware 3.97,
> I attempted to remotely upgrade the firmware from 3.97 to 4.22 using
> the latest K3 utility (ver 1.3.11.5).
> It failed. The K3 utility had detected a 38400 baud rate, even though
> the radio had been set to 19200 baud. The utility could not continue,
> but it did manage to disable the remote RS-232 input in the process.
> Now the K3 Utility autobaud routine sends hex 3B (semicolon) and
> in return usually receives hex 7B (left bracket). Occasionally it will
> receive a longer string - something like 7B FF FA 2C 6A 04 FF F0. Once,
> while testing for 9600 baud, the K3 utility sent hex 54 42 3B (TB;) which
> doesn't make sense.
> I have tried cycling power to the K3, then holding the power on pin
> (pin 8) of the ACC connector low for 10 seconds as the owners manual
> sort of suggests (Manual Rev D5, page 45). (I can't hold down the local
> power button - it is many miles away!)
> I've tried using Hyperterminal to send semicolons. It consistantly returns the
> left
>
> bracket symbol, no matter what speed I set Hyperterminal to.
> Sending enter (hex 0D) returns hex 7D.
> Anyone have any ideas how to remotely recover the K3's normal operation?
> 73,
> Mike W3IP
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html