On Tue, Jun 08, 2004 at 04:48:57PM -0300, Tato wrote: > I'm deaperate looking for a bootloader for 16F819. > > I almost get it working modifying the Shane's Bootloader > but the problem is the 16F819 need to write 4 words at > a time. So let's work on this problem since you're so close. The 4 word at a time rule only has two real implications over the 1 word at a time rule: 1) Files must start on a 4-word boundary and... 2) They must end on a 4-word boundary. In poking around for Shane's bootloader (BTW where is it?) I came across a page that points out these exact facts: http://www.microchipc.com/PIC16bootload/readme.txt The basic idea is to pad the beginning and end of the file such that points 1 and 2 above are met. > > Is there any bootloader available? Actually there is: The Tiny PIC bootloader: http://www.ac.ugal.ro/staff/ckiku/software/picbootloader.htm It should meet all of your requirements because it works with other multi-block programmed PICs (16F87XA for example). The one requirement of mine that it doesn't meet is that it uses the USART, which in my estimation is a much too valuable resource to give up to a bootloader. But at 100 bytes and with source, I don't think you'll be complaining. The other thing about Tiny is that the author has pointers to other PIC bootloaders too. So it's PIC bootloader central IMHO. There you go, two solutions that should get you running in short order. BAJ > > Octavio Nogueira > Tato Equipamentos Eletr?nicos Ltda > (11) 5506-5335 > ====================================================== > nogueira@tato.ind.br ICQ# 222558485 > BASIC Step - O microcontrolador mais f?cil do mercado > BASCOM - O mais poderoso compilador BASIC para ATMEL > http://www.tato.ind.br > ProPic tools - low cost PIC programmer and emulator > http://www.propic2.com > ====================================================== > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu