Kevin Reyes wrote: >EPicwin does not allow an erase only, just allows erase before programming, >so I cant verify erase. I found out that 0091 is the location of first code >change. That is overwrite goes ok until 0091 where the first different >value is encountered. >I verfied that vpp during programming is 12.6 V. > >Thanks for the reply and any further thoughts would be appreciated. > Kevin, I have not been following this thread in its entirety, but I have EPICWin, and it certainly does allow separate erase, verify, blank checking, read ROM, etc, all independent of anything else, so ........ ???????? I am programming 'F876's everyday. - dan =============== > >----- Original Message ----- >From: "Wade Carpenter" >To: >Sent: Wednesday, August 29, 2001 10:54 PM >Subject: Re: [pic]: what does code error at 0000 mean? > > >> Hi. >> >> When you erase the device before reprogramming, did you try to read back >the >> data to confirm that it's all erased? If it doesn't erase, then maybe >your >> UV is not operating quite so well any more? >> >> Also, if that PIC has been reprogrammed so many times, maybe the memory >has >> just worn out. I know the flash parts are only good for 1000 Erase/Write >> cycles, not sure about EPROM... >> >> I can't figure out why you would get that error at 0091. It does seem >that >> if you had a Vpp problem it would show up right away, unless of course >> you're just making minor changes to the software... >> >> Hope that helps, some. >> >> - Wade >> ----- Original Message ----- >> From: "Reyes" >> To: >> Sent: Sunday, August 26, 2001 4:10 PM >> Subject: Re: [pic]: what does code error at 0000 mean? >> >> >> > While attempting to program a 12c508 which has already been programmed, >I >> > get the same error, 'Code programming error at 0091'. If Vpp is the >> > problem, shouldnt it show up at 0000? I can reprogram the same orignal >> code >> > with no problems. >> > >> > Thanks, >> > Kevin R. >> > ----- Original Message ----- >> > From: "Wade Carpenter" >> > To: >> > Sent: Saturday, August 25, 2001 11:06 PM >> > Subject: Re: [pic]: what does code error at 0000 mean? >> > >> > >> > > Code error at 0000 means it is unable to modify the flash. It tries >to >> > > write the first byte, verifies, and the verify fails. >> > > >> > > I'm fairly new to this as well, but here's what i think it might be: >> > > >> > > Are you using Low-Voltage programming or standard? >> > > >> > > If you are using low-voltage programming, maybe your RB3 pin and VPP >are >> > > going high at the wrong times / in the wrong sequence? >> > > >> > > If you are using standard programming, check that your VPP is actually >> in >> > > spec while you are trying to write to the chip. >> > > >> > > Also, is there any chance code protection was enabled? This could >cause >> > the >> > > error as well. >> > > >> > > - Wade >> > > ----- Original Message ----- >> > > From: "rad0" >> > > To: >> > > Sent: Friday, August 24, 2001 9:12 PM >> > > Subject: [pic]: what does code error at 0000 mean? >> > > >> > > >> > > > hello, >> > > > >> > > > trying to program a 16F877 using the EPIC programmer, >> > > > >> > > > I keep getting this message, 'code erroe at location 0000' what >> > > > does this mean? it will read and verify but the blink program >> > > > example will not program..... >> > > > >> > > > I have the configuration set as follows >> > > > >> > > > XT >> > > > off >> > > > per up >> > > > burn out >> > > > flash >> > > > >> > > > >> > > > thanks for your help >> > > > >> > > > -- >> > > > http://www.piclist.com hint: PICList Posts must start with ONE >topic: >> > > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other >[BUY]:,[AD]: ->Ads >> > > > >> > > > >> > > >> > > -- >> > > http://www.piclist.com hint: The list server can filter out subtopics >> > > (like ads or off topics) for you. See http://www.piclist.com/#topics >> > > >> > > >> > > >> > >> > -- >> > http://www.piclist.com hint: The list server can filter out subtopics >> > (like ads or off topics) for you. See http://www.piclist.com/#topics >> > >> > >> >> -- >> http://www.piclist.com hint: To leave the PICList >> mailto:piclist-unsubscribe-request@mitvma.mit.edu >> >> > >-- >http://www.piclist.com hint: PICList Posts must start with ONE topic: >[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads