Please help a new guy get going with a PIC10F222

[paul borgmeier]

I believe the default Config settings is for GP3 to be used as MCLR (which means GP3 must be tied high). Could this be the cause of your problem?

Although I have never used this PIC, this should blink GP0 at 1 Hz

ADCON0 = 0 ; all pins digital
TRISIO = 0 ; all pins output (except GP3)

Main:
GPIO.0 = 1 ; GP0 = high
pause 500 ; Pause 500 mS
GPIO.0 = 0 ; GP0 = Low
pause 500
goto Main

End

Good Luck,

Paul Borgmeier
Salt lake City, Utah
USA

[Quacker]

I have just gotten the chip to ALMOST work correctly. The only port that I can't get control of is GP.2. This port is shared with a clock that seems to be part of the timer, Tmr0. I can't tell from the data sheet, how to gain control. Perhaps someone can help. I figure that once i'm in control of the ports hat it will be much easier to get them to do what I want. Here is the listing that works. Note that GP.3 is always an input and I don't expect to see an noutput on it. Yes, I did throw the kitchen sink at it, but hey...

@ Device PIC10F222, IOFSCS_4MHZ, MCPU_OFF, WDT_OFF, PROTECT_OFF, MCLR_OFF

tmr0= %00000000
TRISIO =%0000
ADCON0 = %000000
GPIO = %0000

Start:
high gpio.2 'test
high gpio.0
high gpio.1

pause 1

low gpio.2
low gpio.0
low gpio.1

pause 9

goto start

[mister_e]

data sheet section 4.5 OPTION REGISTER

Now try

@ Device PIC10F222, IOFSCS_4MHZ, MCPU_OFF, WDT_OFF, PROTECT_OFF, MCLR_OFF
OPTION_REG.5=0 ' TOCS = FOSC/4
ADCON0 = 0
TRISIO =0
GPIO = 0

Start:
    high gpio.2 'test
    high gpio.0
    high gpio.1

    pause 500

    low gpio.2
    low gpio.0
    low gpio.1

    pause 500

    goto start

[Quacker]

Thanks Steve!

I was hacking around last night and finally figured out the "OPTION_REG.5 = 0" To show you how new I am, I didn't know 'til then that I could actually change a specific register bit, let alone that the OPTION register was actually called the OPTION_REG!

BTW, Jeff at MELabs confirmed that the ADCIN command does not run properly on this chip (yet?). The command executes but stuffs the answer in the adres register, not the one you specify.

All-in-all though, a pretty impressive little chip.

Best,
Q

[mister_e]

it's not so hard to do your own ADCIN so far. Just writing and reading the according register. It's pretty well explain in the datasheet. Will be faster and much code efficient.

[Quacker]

Thanks,

As soon as I figured out that I could have my way with individual register pins, everything got easier. I am also wondering if there are any clever tricks out there that I can use to fit in a few more VAR's. I'm out of space and my program isn't quite finished.

[mister_e]

if you can, post your code here. We may see few thing to be shrink. Next step.. switch to a bigger one... like 12F675 or my favourite one 12F683.

512 Byte is really easy to fill... worst when using ANY Basic or C compiler.

Unfortunately those baby 10F don't have internal EEPROM... busted!