Re: A/D converter

David Woodhouse (David.Woodhouse@mvhi.com)
Tue, 20 Apr 1999 15:18:39 +0100

On Mon, 19 Apr 1999, Krawietz wrote:
> > the A/D card works at about 70kHz. What is the simplest way to
> > implement that kind of pooling without processor lock in busy wait loop.
> > I will be grateful for any clue.

root@chaos.analogic.com said:
> I would use the CMOS RTC to generate a periodic interrupt. In fact
> have done it and it works well.

Doesn't the RTC only allow certain periods (powers of two?). You might need to
swap the main system timer onto the RTC, and then we can use the more versatile
pic for other things, such as your ADC and the PC speaker driver.

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