Lpc2000

Because of the build-in ECC, the flash cannot update a block smaller 
than 16 bytes (aligned on a 16 byte boundary). This is not documented in 
the user manual. You can search this list for previous threads about this.

Richard.



Robert Adsett wrote:
> My apologies if this shows up twice.  Every once in a while Yahoo decides
> it couldn't send a piece of mail my way several days in the past and 
> shuts
> down delivery despite having sent mail successfully to the same address
> since many times.
>
> At 07:42 PM 1/25/06 -0500, Tom Walsh wrote:
> >Guillermo Prandi wrote:
> > >Hi. Are Flash write errors normal, i.e. a known issue? When
> > >programming my LPC2138 using the isp21lpc utility, every now and then
> > >I get a write error; a second attempt always succeed. This happens
> > >roughly once every 100 programming attempts. I thought it could have
> > >been a problem with my serial cable or some other hardware problem,
> > >but now I added an IAP function to my test program and I am getting
> > >errors too (i.e., saved data differs from the source data, although
> > >the IAP copy ram to flash command returns CMD_SUCCESS). I checked
> > >everything and I think I covered the normal requisites:
> > >
> > >
> > >
> >
> >There seems to be something goofy going on with those utils.  I tried
> >using the lpc21isp (version 1.24) package on Linux, but it would
> >sometimes error out at random locations.  Not sure why.
> >
> >I finally had to write an ISP loader for an LPC2138 to program an
> >LPC2106.  This loader source I then took an hung some RS232 routines
> >onto it so I could also up load into the LPC2138 from Linux.  So far, my
> >loader works flawlessly.
>
> I had some similar occurrences with the Philips utility as well.  They 
> seem
> to have disappeared about the time I started using the automatic
> downloading and a good cabling setup on the last few centimeters.  
> I've not
> had a similar problem with the lpc21isp program and I've not tried
> IAP.  Mind you the write errors I was seeing were not verify errors 
> but the
> protocol appearing to simply stop and it was rare enough that I 
> couldn't be
> certain as to its source.
>
> A quick question to verify my understanding of what you are seeing
> Guillermo, is your verification source the same buffer you just used to
> program via IAP or do you refresh it from elsewhere before you do the 
> compare?
>
> Just a little more grist for the mill.
>
> Robert
>
> " 'Freedom' has no meaning of itself.  There are always 
> restrictions,   be
> they legal, genetic, or physical.  If you don't believe me, try to chew a
> radio signal. "  -- Kelvin Throop, III
> http://www.aeolusdevelopment.com/
>
>
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