Clock switching?

[Oli]

Hi

Im intending on using a PIC from the nanoWatt series - probably the pic16f684 or similar. I've been reading through the datasheet - I would like to use clock switching, as detailed on P26/27 of the datasheet. I would like it to idle using the LF clock, and then be able to switch to the HF clock upon demand. How do I go about doing this in CCS?

Any help appreciated, thanks!

[Oli]

Can anyone shed any light on this? pointers?

[Ttelmah]

setup_oscillator.

Basically, on parts supporting it, you setup the external oscillator, with the fuses statement, then use:

setup_oscillator(OSC_31KHZ);
#use_delay(CLOCK=31250)

To change to the low speed oscillator (and keep time delays correctly programmed).

setup_oscillator(OSC_NORMAL);

To switch back.
If you use any software time delays, remember that these are hard-coded, based on the last 'use_delay' statement, so if times need to be accurate, you will have to structure the program flow, to ensure that the correct use_delay, was the last one met, before a delay is used.

Best Wishes

[SherpaDoug]

Read the header file for the pic16f684 and see if there is reference to clock modes there.
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