I am using 18's also, and I wish there was a good answer to this one.
I did a design with 18C442's with the intent of switching it over to the =
F's
when they became available, only to find the same problem when I got my
samples about 6 months ago. I was unable to solve this one without buying
another programmer - which I didn't do.
Don't curse me, fellow PICers, but I went with TI MSP430's for new high-e=
nd
flash designs. The tools are cheap and good, the architectures are a bit
more flexible, too. I still use F627's & 8's for simpler jobs and when po=
wer
is not an issue ...though....still can't beat those PIC's overall.

Chris

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of F=E1bio Pereira
> Sent: Tuesday, May 07, 2002 7:42 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: Programming the 18Fxxx devices
>
>
> Hi !
>
> Someone knows any programmer that supports the PIC 18Fxxx devices ???
> I finally got my samples of the 18F452 and saw that my
> JDM-ICPROG can't do it. As far as I saw, the programming
> protocol is very different than that one of the 16 devices.
> The 18F devices use a four bit command followed by a 16 bit
> data (in/out). As I can see, the protocol works by sending
> PIC instructions through the ICSP interface to the target
> processor. Anyone knows more about it (more than it is on
> DS39576A) ????
>
> I think the main problem is only on the software side
> (IC-PROG in my case), because the hardware (JDM) will
> probably work ok with the new devices.
>
> If anyone has some idea or know about a free
> software/programmer that supports the 18F devices, please help.
>
> Maybe we could do some efforts in building our own programmer
> for that (in fact I'm planning to begin with it anyway). If
> there is anyone interested ..
>
> Thx,
>
> F=E1bio Pereira
>
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