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PID: SoupGate-Win32 v1.05
James Harris wrote:
> I have been looking forward to the Raspberry Pi Pico 2 for a while. The
> increased speed will be welcome for one project I want to use it for.
>
> However, according to what I've read there seem to be some missed
> opportunities. Corrections would be welcome but AIUI:
>
> * There are still no analogue /outputs/ - which I would have thought
> would have been cheap and easy to provide.
I suspect the analogue drive circuit is not that simple - would take
area and may compromise power, especially idle power.
You can get some of the way by using PWM and an external R-C network to low
pass filter the PWM. Depends what kind of frequency you need. Or there are
I2C DACs if you need a more accurate output.
> * Although there are now 3 PIO units each one still has only 32 words of
> program memory (which was very limiting in the Pico). I assume that
> because the RP2350 is supposed to be software compatible meaning, among
> other things, that it should run RP2040 PIO code.
That does look to be the case. Looks like the original RP2040 design
optimised them into a corner that's difficult to get out of.
Theo
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