[sdiy] How DCOs work

[Tom Wiltshire]

On 12 Oct 2016, at 21:19, Gordonjcp <gordonjcp at gjcp.net> wrote:

> On Tue, Oct 11, 2016 at 08:23:56PM -0700, rsdio at audiobanshee.com wrote:
>> What you're missing is that the integrator slope would change to the new frequency instantly, but not the reset (until the next period).
> 
> Why wouldn't the reset period change?  One would assume you'd also set the compare value for the counter on control updates.

That's exactly the problem, Gordon. On a lot of hardware implementations, the counters are double-buffered and will only update when the counter resets. So you can't often do an update in the middle of a cycle - the hardware doesn't let you.

But…that's just a challenge, right?!

Tom