Post by thread:16C84 internal EEPROM

I'm truing to use the internal EEPROM on the 16C84 and not having much luck. I need to set some initial values when I program the '84, so I've been trying to use the MPASM directive 'de'. Has anyone used this before? The example in the MPASM manual shows setting 'org 2100h' first. Without it, I simply generate duplicate addresses when I assemble my code. With it, I don't think the values are actually get put into EEPROM, but rather go to Air-ROM. Any help would be greatly appreciated. Thanks, Frank Frank Richterkessing Experimental Methods Engineer GE Appliances spam_OUTFRANK.RICHTERKESSINGTakeThisOuTAPPL.GE.COM

Hi Frank ---------- > I'm truing to use the internal EEPROM on the 16C84 and not having much > luck. I need to set some initial values when I program the '84, so I've > been trying to use the MPASM directive 'de'. Has anyone used this > before? The example in the MPASM manual shows setting 'org 2100h' first. > Without it, I simply generate duplicate addresses when I assemble my > code. With it, I don't think the values are actually get put into > EEPROM, but rather go to Air-ROM. Here is some of the code from the end of a program of mine. It places some initial values into the EEPROM. I have tried it and it works (For me). The only reason it is at the end of my program is because it is something that is hardly ever changed so putting it at the end means I don't have to scroll over it all the time while debugging. Good luck Dennis ;=========================================================== org 2100H de 11,11 ;FirstH, L de 22,22 ;SecondH, L de 33,33 ;ThirdH, L de 00,09 ;RandMaxH, L END ____________________________________________________ FROST - Electronic Design, Manufacture & Consulting. Dennis Frost Tel: +27 331 965125 Cel: +83 2275216 Email: .....dennis.frostKILLspam@spam@pixie.co.za Pietermaritzburg, South Africa ____________________________________________________

Richterkessing, Frank H (GEA, 055132 ) <PICLISTKILLspamMITVMA.MIT.EDU> wrote: > I'm truing to use the internal EEPROM on the 16C84 and not having > much luck. I need to set some initial values when I program the '84, > so I've been trying to use the MPASM directive 'de'. Has anyone used > this before? The example in the MPASM manual shows setting 'org > 2100h' first. Without it, I simply generate duplicate addresses when > I assemble my code. With it, I don't think the values are actually > get put into EEPROM, but rather go to Air-ROM. Frank: The "de" directive works fine, but only the ProMate and PICSTART Plus can program the 16C84's EEPROM Data Memory directly. Which programmer are you using? -Andy Andrew Warren - .....fastfwdKILLspam.....ix.netcom.com Fast Forward Engineering, Vista, California http://www.geocities.com/SiliconValley/2499

At 09:35 AM 11/5/96 -0800, you wrote: >Richterkessing, Frank H (GEA, 055132 ) <EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU> >wrote: > >> I'm truing to use the internal EEPROM on the 16C84 and not having >> much luck. I need to set some initial values when I program the '84, >> >Frank: > >The "de" directive works fine, but only the ProMate and PICSTART >Plus can program the 16C84's EEPROM Data Memory directly. Which >programmer are you using? > >-Andy I have programmed the 16c84's eeprom from the programmer. I set ORG 2100, then define each byte with dw. I use MPASM and parallax's PIC16cxx programmer. I hope this helps.

> >Frank: > >The "de" directive works fine, but only the ProMate and PICSTART >Plus can program the 16C84's EEPROM Data Memory directly. Which >programmer are you using? > >-Andy > "Of microchip's own programmers" only the ProMate and PICSTART Plus can program the 16C84's EEPROM Data Memory directly. Most Third party programmers program the data EEPROM. For the PICSTART 16B, there is also a Third party firmware replacement that allows the data EEPROM to be programmed with or without the rest of the part. (Making it suitable for the 16CR84 also.) Jim

Frank: There is, or at least was, a problem writing to the EEPROM using the PICSTART Plus in MPLAB. If you are using that combination, try going to the Options menu, select Development Mode and check the Editor Only box. In the edit only mode, the data seems to get written to the device correctly. Otherwise, the EEPROM is all 'FFh'. It was still that way with MPLAB 3.09.10. I haven't tried the latest version. At 04:02 PM 11/1/96 -0500, you wrote: {Quote hidden}>I'm truing to use the internal EEPROM on the 16C84 and not having much >luck. I need to set some initial values when I program the '84, so I've >been trying to use the MPASM directive 'de'. Has anyone used this >before? The example in the MPASM manual shows setting 'org 2100h' first. >Without it, I simply generate duplicate addresses when I assemble my >code. With it, I don't think the values are actually get put into >EEPROM, but rather go to Air-ROM. > >Any help would be greatly appreciated. > >Thanks, >Frank > > >Frank Richterkessing >Experimental Methods Engineer >GE Appliances > >FRANK.RICHTERKESSINGspam_OUTAPPL.GE.COM > > Brent W. Miller Menlo Park, CA @spam@bmillerKILLspamscruznet.com

> Richterkessing, Frank H (GEA, 055132 ) <KILLspamPICLISTKILLspamMITVMA.MIT.EDU> > wrote: > > > 2100h' first. Without it, I simply generate duplicate addresses when > > I assemble my code. With it, I don't think the values are actually > > get put into EEPROM, but rather go to Air-ROM. > > Frank: > > The "de" directive works fine, but only the ProMate and PICSTART > Plus can program the 16C84's EEPROM Data Memory directly. Which > programmer are you using? It also works fine with the development programmer from Forest Development. The bad news for this one is that you have to have two different source files compiled, and program them separately. > > -Andy > > Andrew Warren - RemoveMEfastfwdTakeThisOuTix.netcom.com > Fast Forward Engineering, Vista, California > http://www.geocities.com/SiliconValley/2499 > --- Jindra Vavruska FIDO: 2:423/33.7 Vasatkova 1028 FAX/VOICE: +42-2-81915468 198 00 Praha 9 (fax currently unavailable) Czech Republic (hobby: PIC)