Post by thread:[PIC]:16F628 EEPROM write routine

> >What has me head-scratching is the address of 1C compiled > >for EECON1 with WREN > > EECON1 is in bank 1 (9Ch) Yes, I know. So what do you make of these two lines, compiled with MPLAB 5.30.00, using its 16F628.inc file 005D 151C bsf 0x1C,0x2 ;eecon1,wren ........ 0062 149C bsf 0x1C,0x1 ;eecon1,wr Why does the eecon1 in line 5D end up $80 different from the eecon1 in line 62 ? If anyone has a minute to cut/paste my code from the original post and compile it I'd like to know if they get a different result > The datasheet is just plain wrong from memory! Then so is their "improved" web shite. If, sorry, when I get this going I shall drop them a(nother) line about corrections, much good that it does > Taken from a recent 'F628 project Ta ever so -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

Jinx wrote: > > 005D 151C bsf 0x1C,0x2 ;eecon1,wren > ........ > 0062 149C bsf 0x1C,0x1 ;eecon1,wr > > Why does the eecon1 in line 5D end up $80 different from > the eecon1 in line 62 ? If anyone has a minute to cut/paste > my code from the original post and compile it I'd like to know > if they get a different result bsf 0x1C,0x2 01 0101 0001 1100 0101 010 0011100 = 0x151C BSF 0x2 0x1C bsf 0x1Cm0x2 01 0100 1001 1100 0101 001 0011100 = 0x149C BSF 0x1 0x1C -- Best regards Tony mICros http://www.bubblesoftonline.com .....salesKILLspam@spam@bubblesoftonline.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

Thanks Sherlock, I got that ;-) 01 0101 0001 1100 = 0x151C 01 0100 1001 1100 = 0x149C It's the way 14 bits are spread over 2 bytes and how MPLAB extracts the 4-digit hex. It just so happens that the effect makes it look as though the op-code is in the wrong bank -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu

> If you are trying to load values from ram locations defined in > bank0 you need to do something like this > > BCF STATUS,RP0 ;bank 0 > MOVF BANK0ADDRESS,W ;address from bank 0 into w >........ > BSF EECON1,WREN etc... > > You could save some bank switching by using the FSR register > to access one of the bank0 values You'll see from a post yesterday that's exactly what I'd done. I stand by my claim that Microchip's documentation is incomplete and/or misleading. In my view the manufacturer's manual+errata is not a starting point - it is THE definitive paperwork for that product, and I begrudge both my own time and the list's time sorting this out. I have a million things to do and sorting things like this shouldn't be one of them. There is plenty of empty space in the manual (and we are the ones that have to print the damn thing out these days anyway) for user- or factory-submitted revisions Mr Grumpy -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics