Very Simple ICSP Programmer

[Squibcakes]

Have you tried another uPic.. Say a 16F628 or 16F88?

This programmer works just not on chips ending in 'A' or when connected to laptop serial ports.

squib

[Angus Anderson]

Hey Squibcakes-

I'm using your program for development using ICSP with '873A, '876A, '877A - and ICPROG, no problem, works every time

Are you saying that you have come across some problems with -A suffix PIC's and your programmer?

regards

Angus

[Squibcakes]

Hi Angus,

Yep. I don't use too many chips so I can't say this effects all chips ending in 'A'. I've tested the 84A, 628A chips and they only programmed the first time for me. Subsequent writes failed.

Not that it matters I mostly use the F88 these day's with no problems.

I'm glad it works for you and your happy. For a cheap and dirty programmer it does the job very well. Anyone else wanting a more reliable solution should buy a specialist programmer and pay a handsome sum for it. Mr_e will gladly take your money!

Have you tried using Winpic800 (Free prog software)? Its a lot faster at programming than IC-Prog.

Cheers

[mvs_sarma]

Hi all,

Acircuit or assembled piece doen't work, the solution need not be hardware and we need not rush tp spend and order another readymade board-- If that does't work shall we run for a third item?

Just cool down and think logically we can resolve. afterall intermittent failure may be due to improper configuration of the hardware w.r.t O/S (like win98,winXP)

i quote a comment of a programmer designer Mr FENG (FENG3 programmer 5.3 ver8). he once idcated he was still using RCD programmer. It proves Hardware / sofware can be maintained and debugged than rushing for replacements.

See the requiremets of a particular chip are met as per programming considerations, while programming a chip. (sometimes one of the RA pins is tobe pulled down)

[Angus Anderson]

Hi Squibcakes-

Yes, on your suggestion I downloaded Winpic800 and you're right - about 3 to 4 times faster. Also allows programmming of code only, data only, or config only which is really useful. Am using it full time now. Tks for the suggestion.

I'll have a go at a '628A this weekend & see what happens. On the other side, I must have reprogrammed one '873A at least 24 times today, not one failure. Could it not be that the '628A is more sensitive to a slightly low VPP than the others? As far a I am aware, VPP should be 13.5v, but most workable (not laptop) RS-232 "12V" levels seem to be a little below that - mine is only 11.8v & it still works.

regards

Angus

[dizzydude]

hi everyone
Can someone please tell me how to use this setup to program a 18f2550 pic and the settings please???

thanks in advance for any info.

[turman]

How i can to do this ???