PIC16F767 blinking code

[DanPBP]

At last, after two weeks and a new programmer, a 16F767 working blinking code:

@ DEVICE PIC16F767, INTRC_OSC_NOCLKOUT ; System Clock Options
@ DEVICE PIC16F767, WDT_ON ; Watchdog Timer
@ DEVICE PIC16F767, PWRT_ON ; Power-On Timer
@ DEVICE PIC16F767, MCLR_OFF ; Master Clear Options (Internal)
@ DEVICE pic16F767, PROTECT_OFF ; Code Protect Off

OSCCON=%01110000

main:
High PORTB.7
Pause 500

Low PORTB.7
Pause 500

GoTo main
End

[sayzer]

Hi Daniel,

Is "DEFINE OSC 8" necessary in this case or not?

Eventhough you set OSCCON, how does PBP know that it is 8Mhz?

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[DanPBP]

Because OSCCON=%01110000 sets the internal oscillator to 8Mhz...

Read the 16F767 datasheet section 4.6.3 for other frequencies...

PICs makes me love and hate them at the same time....

[mister_e]

In those situation, you need to take a break and have a cup of coffee
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=1118&stc=1&d=116054038 5">

[sayzer]

Because OSCCON=%01110000 sets the internal oscillator to 8Mhz...

For sure it does set it to 8Mhz but don't we also need to state DEFINE?


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[DanPBP]

I don't think so... So far It's working fine...

I think that DEFINE OSC is for external oscillators only, but not sure...

[mister_e]

NOPE, DEFINE is a compiler directive and MUST be added at the top of the code. OSCCON is a PIC register that must be set like all the otheres. Let's Say TXSTA, RCSTA, SPBRG.

Do a simple Test, with your current OSCCON setting do a simple LED blink. use DEFINE OSC 4.. then use DEFINE OSC 8

what happen?

[sayzer]

NOPE, DEFINE is a compiler directive and MUST be added at the top of the code. OSCCON is a PIC register that must be set like all the otheres. Let's Say TXSTA, RCSTA, SPBRG.

Do a simple Test, with your current OSCCON setting do a simple LED blink. use DEFINE OSC 4.. then use DEFINE OSC 8

what happen?

That is what I thought so.
Daniel, could you pls test it and post the result?


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