[Elecraft] P3 Firmware Checksum failure - Supplemental

[Bill K9YEQ]

Paul,  Perhaps the downloaded firmware failed.  Download a fresh copy and
try it.  This could happen with a time out or hyper busy internet
connection, or, virus.

73,
Bill
K9YEQ


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Paul M Dunphy
Sent: Saturday, January 19, 2013 6:17 PM
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] P3 Firmware Checksum failure - Supplemental

On 1/19/2013 7:40 PM, Bill K9YEQ wrote:
> Looks to me like you do not have a connection via the USB to RS232.  
> Try restarting your PC.  Then find a port with the P3 utility that 
> demonstrates you are connected.  I just did the update with no issues.  
> I did have to find the correct port, as the port assignments can 
> change based on the amount of stuff you have hooked up and the order 
> in which they are reassigned.  I run a W2, K3, P3, Kat500, KX3, etc.  
> Hope that helps you understand the potential issue with the ports and 
> that sometimes they get reassigned.
>
> 73,
> Bill
> K9YEQ
>
>

Hi Bill,

      Thanks for the suggestion.  I don't have a USB to RS232 connection,
but rather a real DB9 Port.  I'm pretty sure it is the correct port.  I know
Windows can reassign ports at times, and I think I have eliminated that.

     The reason I believe that to be so is because with the P3 Utility
program, on the Ports tab, the Test Communications button returns the
message "P3 Waiting for firmware load. RS-232 speed 38400 bit/sec." when
clicked.

      Also, when I direct the P3 utility to "Send Checked Items to P3" 
(with MCU checked) under the Firmware tab, a progress bar appears on the
utility program and works its way across the window, taking about a minute.
Simultaneously with this, a white progress bar appears on the
P3 screen.  When they both complete after about a minute, that is when the
P3 displays:

P3 BOOT LOADER
CHECKSUM TEST
FAILED CHECKSUM
READY FOR DOWNLOAD

    I have repeated this process a number of times.  I have power cycled the
P3 and K2, and rebooted my PC.  I also disconnected the P3 from the
K3 so that the RS232 DB-9 cable is connected to the P3 only, and not daisy
chained further to the K3.  Every combination behaves consistently, giving
the minute long wait with the P3 utility program and the P3 progress bars
progressing as I would expect.  Then the P3 display indicates a checksum
error and says it is "READY FOR DOWNLOAD." 
The P3 Utility program seems to time out and display the following after
5-10 seconds:

Error code 0xE2000048: No response to poll while synchronizing to buffer
boundary MCU verification failed. Reload MCU.
Click "Close" to close this window

     It's possible it is a communications problem or port mixup, but if it
is, I can't understand why the P3 unit's progress bar would respond to the
upload.

     I will pass all of this information along to Elecraft support. I was
hoping someone else has encountered this, but it seems unique to me.
Everything worked fine until I tried to upgrade from firmware version 1.20
to 1.24.

73, Paul VE1DX
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