Servo Object?

kerryw

Is there a simple Servo controller object available? I looked at the library one and it looks like it needs external chips to support that many. I'm just looking for an object that can control 4 servos simultaneously. Any suggestions? Thanks.

Kerry

Beau Schwabe

kerryw,

Check out the object in the Propeller Object Library (Servo_Demo.zip).

http://www.parallax.com/propeller/object.asp

This object will allow you to control up to 32 servo's without any additional hardware.

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

kerryw

Thanks Beau. I'm paring that code down now for a smaller requirement. I'd actually like something where I could set which specific pins to use for servos, and allow for smaller number (like 4).

BTW, shouldn't this

long ServoDataA[noparse][[/noparse]47] ' 0-47 Servo Pulse Width information
long ServoDataB[noparse][[/noparse]47] '48-95 Servo Pulse Width information

be this?

long ServoDataA[noparse][[/noparse]48] ' 0-47 Servo Pulse Width information
long ServoDataB[noparse][[/noparse]48] '48-95 Servo Pulse Width information


Thanks again Beau
Kerry

CJ

I made one the other day, works fairly well, I will post it when I get a chance

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Who says you have to have knowledge to use it?

I've killed a fly with my bare mind.

Beau Schwabe

kerryw,

That's the wrong code!!· In the object directory it should only be a 32 servo driver.

What's in there right now is a 96 servo driver.· Let me try to figure out what happened
and post the correct code for the 32 servo driver.



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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

kerryw

Thanks Beau. I'm just looking for something less hardcoded and more generic. Having to use a block of 8 pins makes the demo board less useful as it only has 8 available for general use.

Thanks,
Kerry

CJ

here is my *very* basic servo control object, be careful what pulse widths you send to it, it doesn't have limiters

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Who says you have to have knowledge to use it?

I've killed a fly with my bare mind.

kerryw

Thanks CJ, that looks like it will do exactly what I wanted.

Kerry

Beau Schwabe

kerryw,

Here is an updated 32 servo object. Feel free to use CJ's or this one.
I will try to get this correctly updated in the Propeller Object Library.

The whole point of exchanging or using object's and making them open
source is so that anyone can tweak, modify, or simply just use them
as they see fit to do so.

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

kerryw

Thanks Beau!

Kerry