Pickit3 ordered -- what else?

[Michael]

yes -- do have the right device chosen on winpic and micro code. I'll give some of Mark's stuff a whirl and then give up.

maybe that OSCCON will do it ?
new one on me.

by the way --
chose 12F675 (in winpic) then says --

config word #1 3FFC
config word #2 3FFF

then after a programming attempt in red I get where it says "bandgap"
cal=0x003000 oscillator cal=0x003FFF


THANKS much.

[mark_s]

maybe that OSCCON will do it ?
new one on me.

Michael,

The code above was for a pic12f683. I must have cut and paste some older code without changing the notes.
After looking at the 675 data sheet it has no osccon register. Sorry for the bad info and hope you get your project
working

[HenrikOlsson]

Hmm, that's weird.... Looking at the 12F675 datasheet it doesn't appear to HAVE an OSCCON register and trying to compile code with OSCCON=$70 in it fails - not surprising so I don't know what Mark is doing there.

EDIT: Ah, OK, code for another device, that explains it.

The OSCCAL register is used to tweak the internal oscillator up/down a bit in order to get as close to 4MHz as possible. When the chip is manufactured they find out the "best" value for OSCCON (which can differ from chip to chip obviously) and store that value for us at the last location in FLASH memory. So what DEFINE OSCCAL_1k 1 does is to instruct the assembler to generate code for us to retrieve that value from location 1k and put it in the OSCCAL. I don't think it has anything to do with the programmer and any descent device programmer (which I'm sure the EPIC is) WILL retain the calibration value at the last location by Reading it and re-Writing it when it programs the device.

The 12F675 only has one CONFIG word and it's located at adress 2007h and not 3FFCh that the error message seems to indicate. And why it complains about a config word #2 when there's only one in the device I don't know. I really have no idea what's going on there.

/Henrik.

[Michael]

Ok -- you guys really know your stuff -- appreciate all your help. Time to move on and just use the pickit3 when it arrives.

[Scampy]

Not sure if this helps, It's an old (and I mean old) bit of code that I wrote for a friend to fade a light like the one on Dr Who's tardis (I can't actually recall if the code fades the LED correctly as I don't have a 12F675 to hand). It could probably be written a lot simpler, but I was learning PBP at the time (still am so most of my code is never tight )

If you comment out the config setting in the 12F675.INC file in the PicBasic folder it compiles using MPSAM without error.

@ __CONFIG _INTRC_OSC_NOCLKOUT & _WDT_ON & _PWRTE_ON & _MCLRE_OFF & _BODEN_ON

 __CONFIG
 _INTRC_OSC_NOCLKOUT
 _WDT_ON
 _PWRTE_ON
 _MCLRE_OFF
 _BODEN_ON

TRISIO.0 = 0   'Set GPIO.0 to output.
ANSEL.0 = 0    'Set GPIO.0 to digital		
VRCON = 0        ' Voltage reference disabled
OPTION_REG.7 =    0


led var GPIO.0
i var byte
getout var bit

main:
for i = 1 to 254                                              
    Pwm GPIO.0,i,1
    pause 5
    if i=253 then 
        i=1
        GetOut=1
        endif
   next i

if Getout=1 then goto down

down:
for i = 254 to 1 step -1                                              
   Pwm GPIO.0,i,1
    pause 5
    if i=2 then 
        i=1
       GetOut=0
        endif
   next i

if Getout=0 then goto main

Might be worth giving it a go one last time with your old programmer. It's been years (circ 2001) since I used WinPIC and an old JDM programmer, but I do recall it was very hit and miss at programming. I seem to remember some other version like WinPIC-PRO or something as being an alternative which I think worked better. Might be worth a quick google if you still want to try and resolve this.