Post by thread:Serial programming

My first experience of a PIC was in building a controller, serial comms device and remote unit controller with LCD support and 16 remote units running on a twisted pair network..... Programming was done in serial mode from a compiler and programmer I wrote in BASIC (euch! but only choice - no PC at home). Problem was, I ruined several PICs, as the CP bit set itself no matter what I wrote to the fuses... Bit of a bugger when you've got a _small_ budget! OK now I-m working on a PICSTART, but I tried this idea of sending the parallel data to do bulk erase, but it didn't work. It would be very nice to build the serial bulk erase command into it. Bryan -- --------------------------------- BRYAN CROTAZ - spam_OUTb.crotazTakeThisOuTic.ac.uk --------------------------------- TECHNICAL MANAGER Student Television Of Imperial College Beit Quad, Prince Consort Road London SW7 2BB Tel. 071-594-8104 Fax. 071-225-2309 attn. STOIC

Erik Hermann wrote: > I've seen a very simple circuit to read (program ?) the 16C84 > directly via PC-Parallel Port. > But I don't remember where. Perhaps you mean Microchip application note AN589. A Postscript copy can be snatched from Microchip: ftp://ftp.ultranet.com/biz/mchip/an589.zip Details of another approach are available; get: ftp://ftp.ee.ualberta.ca/pub/cookbook/comp/ibm/pic84* David -- .....david.taitKILLspam@spam@man.ac.uk

>Hi. > >I've seen a very simple circuit to read (program ?) the 16C84 >directly via PC-Parallel Port. >But I don't remember where. > >Does anyone know how to do this, or where to get this circuit ? > ftp://rasi.lr.ttu.ee/pub/sis/msdos/pgmtools/pip-02.zip is a programmer software for PIC family micros + Serial EEPROM's able to work with many selfmade PIC16C84 programmers Programmer drivers are in: ftp://rasi.lr.ttu.ee/pub/sis/msdos/drivers/ for schematics you may browse: http://rasi.lr.ttu.ee/~sis there are few links to pages with embedded Programmer schematics. Antti sisKILLspamrasi.lr.ttu.ee

>> I've seen a very simple circuit to read (program ?) the 16C84 >> directly via PC-Parallel Port. >> But I don't remember where. > >Perhaps you mean Microchip application note AN589. A Postscript copy I've already buildt this circuit, thanks. But I'm looking for a simpler an cheaper circuit, because this part will perhaps be used as an educational system for students. That means, every student has to buy one. > >Details of another approach are available; get: > >ftp://ftp.ee.ualberta.ca/pub/cookbook/comp/ibm/pic84* Ist this your cuircuit ? I know it. Thanks - Erik

Erik Hermann wrote: > I've already buildt this circuit [AN589], thanks. > But I'm looking for a simpler an cheaper circuit, because this part will > perhaps be used as an educational system for students. > That means, every student has to buy one. Well, the prize for the most simple circuit must go to Mark Cox. The PIC-FAQ has details of the primary FTP site for his design, however, if you visit Silicon Studio's site as recommended by Antti in an earlier post, you can grab a copy from there: ftp://rasi.lr.ttu.ee/pub/sis/prod/microchip/3rd-Party/misc/blowpic.zip Is this the one you mean? > >ftp://ftp.ee.ualberta.ca/pub/cookbook/comp/ibm/pic84* > > Ist this your cuircuit ? > I know it. Yes. I guess the implication is that you know it but have rejected it also. If you haven't looked at the cookbook site for a while then you can now pickup some PCB artwork by Mike Laidlaw (pic84art.zip) which is a bit more integrated than the version that has been there for a while (pic84pcb.zip). David -- .....david.taitKILLspam.....man.ac.uk

Darren Logan <EraseMEDAZLOGANspam_OUTTakeThisOuTAOL.COM> wrote: > Can someone explain to me how one can program a PIC serially using only two > pins ??. Excruciating detail is available in the programming spec sheets at microchip. Different devices have different specs. It's not really just two pins, you need to supply power, ground, and a program signal. But once that's done, you shift the programming commands in using two pins. On one pin (program data), you set the bit to be shifted, on the other pin (program clock) you toggle the levels to shift the data bit in. > Where can I find the serial programmers ?? and how do they work ?? Read the articles by Myke Predko at http://www.rentron.com/pic.htm for a much better explanation and a simple programmer (for the 16F84) circuit. -greg

Darren Logan <DAZLOGANspam_OUTAOL.COM> wrote: > Where can I find the serial programmers ?? and how do they work ?? Check out http://www.picnpoke.com/engine.html There's an example of reading a PIC 16F84 there as well. -- Best regards Tony 'The Engine' - Design your own programmer. http://www.picnpoke.com Email @spam@picnpokeKILLspamcdi.com.au

The new Square One book on Serial Programming for the PIC is very good also. It has some nice explanations and routines in it. It explains all the different ways, including using RS232 and two wire, one wire, I2C, etc. http://www.sq-1.com Dan {Original Message removed}

Now that is really embarrassing. I answered the wrong question with my previous post. It was a good answer .. just a dumb submission. The Serial Pic'n book is good - better than this poster. Sorry, Dan {Original Message removed}