We do check each block with a checksum. We do have a per block ACK. I can't tell if a Microham device us inline...
Dick On Feb 6, 2011, at 15:43, "Craig - AE6RR" <[email protected]> wrote: > Dick, > > Would it be possible to check each record or block of data for validity > (checksum, CRC, etc.) and acknowledge (ACK) or request a resend (NAK) from > the PC before writing it to flash? If a data block is corrupted a resend > could be quested multiple times before giving up, declaring an error and > "bricking" the radio. > > Another option would be to validate the serial connection with some test > data before starting the actual download. > > As a bare minimum, I would suggest a warning box that would popup when a > download is started. > > Something like: > > "Do not attempt this with a microHAM USB interface or any other > non-compatible interface - Click OK to proceed". > > I do highly commend Elecraft for including a "bootstrap loader" in the > firmware which allows the user to correct the problem without having to send > the radio back to the factory which is the case with many other upgradeable > products. > > 73, > - Craig, AE6RR > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Dick Dievendorff > Sent: Sunday, February 06, 2011 1:08 PM > To: [email protected] > Cc: Elecraft; [email protected] > Subject: Re: [Elecraft] Fwd: K3 Failed DSP Firmware Download > > The PIC18F8722 microcontroller used has 128KB of flash program memory and a > bit less than 4KB of RAM. Its a Harvard architecture machine, not the Von > Neumann model. Your "simple" suggestion is infeasible. There is no place on > chip to buffer the firmware in its entirety. > > Dick, K6KR > > On Feb 6, 2011, at 14:53, Ross Primrose N4RP <[email protected]> wrote: > >> On 2/6/11 3:36 PM, Don Wilhelm wrote: >>> I do not know how any additional degree of "robustness" in K3 Utility >>> could correct for that condition. >>> >> >> Simple... Don't write ANYTHING to the K3 EEPROM (I assume) until the K3 >> has received the ENTIRE firmware file w/o errors. Blocks with errors can >> always be resent.... >> >> 73, Ross N4RP >> >> -- >> FCC Section 97.313(a) "At all times, an amateur station must use the > minimum transmitter power necessary to carry out the desired > communications." >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
