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[DPRG] Processor Communication via ADC
Subject: [DPRG] Processor Communication via ADC
From: Kipton Moravec
kip at kdream.com
Date: Thu Feb 14 08:24:49 CST 2008
Well you have to make sure the grounds stay the same.
And how accurate are you shooting for? If you say 8 bits and use a 10
bit ADC and DAC then you have a chance.
Why not use PWM? A lot of processors have built in PWM generators, and
Capture units. You can look at the timing ratio between high and low or
between high and the total cycle. I think your accuracy would be better.
I am going to use this to transmit an analog signal across an isolator.
Kip
On Wed, 2008-02-13 at 20:10 -0600, Eric Sumner wrote:
> I am trying to design the electronics for a bipedal walking robot, and
> the software design includes 5 separate controllers in a hierarchy
> such that each controller needs to feed a setpoint to the next tier of
> controllers. Would it be a bad idea to use a digital potentiometer to
> generate an analog voltage that is the desired setpoint, so that it
> can be read with the ADC of the next controller. Normally I wouldn't
> try this, but I need to get both of these parts working anyway for
> other parts of the project.
>
> -- Eric
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--
Kipton Moravec KE5NGX
"Always do right; this will gratify some people and astonish the rest."
--Mark Twain
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