On Mon, Oct 29, 2007 at 09:21:37AM -0400, Detrick Merz wrote: > On 10/29/07, Jan-Erik Soderholm wrote: > > Detrick Merz wrote: > > > I have been going through the "Elmer 160" course,... > > > > Generaly pretty good, even if they uses the F84A... :-) > > They do, but I've been swapping in the 'F628A instead as I go through it. That's fine as long as you understand that it's critical to grasp the use of hardware periperals. The major problem I had with that course is that it bit banged everything (due to the 16F84). Nigel Goodwin's course picked up with a 16F877 IIRC. Much better platform to learn from. > > > > I have built one of BAJ's THVP's,... > > > > Link ? > > http://finitesite.com/d3jsys/proghvp.html > > > Is this one of the design without a local processor > > to handle the low-level programming ? > > No local processor. Barely more than just a parallel cable. Which was exactly the point BTW. > > > How come you selected exactly that programmer ? > > In order: Simple, wide range of chips supported (16Fxxx), cheap. Thanks for outline the three goals of that programmer. Also I believe that I pointed out on my page that its major purpose was to be a bootloader dumper and not a traditional programmer (though it certainly could be used for one). Build a one off, dump bootloader code, and put it away until you need to setup bootloaders into your next batch of chips. > > > > I just don't feel comfortable asking it to write > > > this stuff out to the PIC until I understand why > > > it seems to be reporting config bits incorrectly. > > > > No big deal, try it. If it doesn't work, they'll > > just be re-programmed next time... > > I'll give it a shot then. I guess my biggest fear is having CP set to > ON. Thanks for the quick response! No worries. All CP set on means is that you have to do a full code/config erasure before you can reprogram the part. Also rest assured that picprg doesn't change any of the config bits. You're probably seeing a display error only. BAJ -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist