What's the LVP status ? Pickit3 sometimes requires reconnection when there is a malfunction. Did you try powering via PICkit ?
Did something go wrong with the board in between ? Sunish On Fri, Dec 27, 2013 at 5:21 PM, Joep Suijs <[email protected]> wrote: > Hi Rob, > > No experience with these chips; I've only used vintage PICs ;) > Nevertheless I had a look at the datasheet. At first glance there are > some differences since 18f6722/23 has a 'C compiler optimized architecture' > while 18f6680 is are source code compatible with pic16f and pic17 > instruction sets. This does not explain why you have issues with 18f6722/23 > (one would expect the other way around) and why the 18f6722 has worked in > the past. A quick comparison of the instruction set learns that there is no > (obvious) difference between the two families. > > So not very helpful :( > > One suggestion left is to look what has changed. Board modifications? > Power supply? Compiler version? Device files? > Another suggestion is to look into the pickit3 programming issue (which > points toward hardware since the wisp works okay). Power supply okay? No > LVP issues? Properly connected? > > Joep > > > > 2013/12/27 Rob Hamerling <[email protected]> > >> >> Hi guys, >> >> I wanted to test a blink-a-led sample for a new 18f6723. >> Programming with the wisp648 and xwisp2 worked fine, but the led didn't >> blink. Then I took a 18f6722, which I'm sure worked in the past: same >> story! But with 18F6680 the led blinks! All with the same test board, only >> a different PIC (each on its own plugin daughterboard). >> >> Then I tried to program the 18f6723 with a Pickit3, but now the PIC is >> not even recognized, while it was correctly recognized by the wisp648. It >> got a device ID 0x0 in stead of the expected 0x1400. >> Same with the 18f6722 and 16f6680 (bot deviceID 0x0). >> >> Any suggestion where to search for the cause? >> >> Regards, Rob. >> >> >> -- >> R. Hamerling, Netherlands --- http://www.robh.nl >> >> -- >> You received this message because you are subscribed to the Google Groups >> "jallib" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/jallib. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/jallib. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "jallib" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/jallib. For more options, visit https://groups.google.com/groups/opt_out.
