[Elecraft] K3 Firmware Update.

[Dick Dievendorff]

There should be no data corruption caused by using other programs while the
K3 Utility is sending firmware to the K3.  Closing the K3 Utility during a
firmware update (which should cause an "are you sure" sort of dialog) will
require that you send that firmware file again, and if it's the MCU, the MCU
goes into a "boot loader" state which looks different and may require a K3
power cycle by removing the power plug.  

The protocol used during firmware update doesn't have really tight timing
requirements.  There is a checksum test and an acknowledgement on each block
sent.  

Most Windows systems are sharing time with a whole lot of processes even
when you're not actively doing anything on the desktop.

I routinely go through e-mail or compile other programs while firmware is
loading, and I probably load firmware more often than anyone except perhaps
Wayne and Lyle.

Dick, K6KR


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David Robertson
Sent: Saturday, April 03, 2010 5:54 AM
To: phystad at mac.com
Cc: Elecraft
Subject: [Elecraft] K3 Firmware Update.

Phil,

It is very important that you be certain that whatever you use to get a
RS232 connection from your computer to the K3 is good.
Running HRD (Ham Radio Deluxe) is a good test. Have your K3  set at the
highest baud rate it can do because that is what the K3 utility is going to
use.

When upgrading your firmware do not do anything on the computer until the
up-date is finished. Clicking around your Desktop or going to other
applications in your computer during the up-date can result in a time slice
in the process which can corrupt data.

Enjoy your K3!

73
Dave KD1NA
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