Changing PIC clock speed

[ccdubs]

Hi All,

I want to generate a 1kHz continuous output with an 18X on pin 3. In the past when I have done this I have used the pwmout command and a poke $8f, %01000000 command to slow the clock speed so I can acheive the correct frequency.

Now I would like to add other tones which are better generated with the sound command. However I don't want these to be affected by the reduced clock speed.

Is there any complication if I change the processor speed of the PIC on the fly everytime that tone is needed and then change it back?

Or perhaps there is a better way to acheive this tone? ( I have asked that question on this forum previously and the answer was to use the above method.)

Thanks.

 

[hippy]

There shouldn't be any problem switching back to normal speed. Use SETFREQ M4 or SETFREQ M8 as required as that will ensure the clock has stabilised before continuing.