Simple questions about SmartPin configurations

rjo__

Except for setting up the SmartPins, I honestly believe that the easiest language to learn and most efficient to use will always be P2PASM. It is such a joy and simple that it is hard to not recommend it as the first choice for a new user with any experience at all... except for the SmartPins.

I simply cannot read the documentation. Every time I try, I end up crying out for help. Which always arrives in the nick of time, but eventually you guys are going to get tired of answering SmartPin questions.

So... here goes: My investigation into whether or not an easy SmartPin configurator can be written....by me:)

Questions:

Is there a bit or bits which says "you're an output or you're an input"
Is there a bit or bits which says "you are digital" or "you are analog"

thanks

Rich

cgracey

The five-bit smart pin mode should correlate with the 13-bit low-level pin configuration for things like DAC and ADC functions, as well as input and output functions.

rjo__

That's what I mean:)

You are speaking English. I'm hearing Greek as translated by a Russian as told to a Latvian.

I'm guessing that your answer is "no."

I used to invoke "for anyone but Chip" because it really upsets me to use any of your time.

I'll get there... let the other guys chime in.

Thanks

evanh

I've written a couple of assistant docs to go with the main I/O and smartpins section in Chip's google doc. First one covers the config bits for custom pin modes, largely independent of smartpins. I know it probably also needs more verbose descriptions for each mode. Let me know if it helps - https://forums.parallax.com/discussion/comment/1452036/#Comment_1452036

The other one is re-labelling the smartpin counter modes in general terms - https://forums.parallax.com/discussion/comment/1482243/#Comment_1482243

EDIT: I also had a shot at making a block diagram of the I/O functions - https://forums.parallax.com/discussion/comment/1473762/#Comment_1473762

rjo__

Thank you EvanH. I took a look just to see what was there. I'm going to have to go back and study it.
The "Figuator" that I was thinking about was a Boolean exercise. Now it looks as though it is going to be a series of switch buttons and fill in the blanks. The end result will be a P2Pasm prototype. It isn't real high on my list right now, but a little each day should get me there by February.

evanh

A little trivia: There is 128 DAC channels (4x8 cogs + 4x8 streamers + 64 smartpins) feeding 64 DACs that can be muxed in 1088 ways. EDIT; Err, maybe that's not very realistic since the cog/streamer muxing is done in groups of four. So, more like 8 cogs x 16 four-channel groups x 2 for streamers + 64 smartpins = 320 ways.

evanh

[deleted] Updated smartpin counter modes in other topic instead

rjo__

evanh,

you are wonderful.

thanks

pilot0315

evanh wrote: »

A little trivia: There is 128 DAC channels (4x8 cogs + 4x8 streamers + 64 smartpins) feeding 64 DACs that can be muxed in 1088 ways. EDIT; Err, maybe that's not very realistic since the cog/streamer muxing is done in groups of four. So, more like 8 cogs x 16 four-channel groups x 2 for streamers + 64 smartpins = 320 ways.

@evanh

Muxed = multiplexing?? Can you send me a link to something that explains that. I have been trying to get an understanding.
thanks.
https://en.wikipedia.org/wiki/Multiplexing

evanh

Those are applications. The building blocks of a multiplexer are a group of switches and the encoded control lines. For digital logic this can also be done with AND and OR gates - https://en.wikipedia.org/wiki/Multiplexer

PS: About half way down the article, both arrangements are shown side by side.

pilot0315

@evanh
Thanks I will look.