Post by thread:[SX] Servo Control using SX/B

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Lmiller1708 wrote:What is the best way to control servos? I'm also using IR sensors.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Use the PULSOUT command. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Bean's right, PULSOUT is easiest. If you happen to need "background" servo control, you can do it with an interrupt-driven virtual serial controller. See this thread:

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Lmiller1708 wrote:

Thanks Guys, Like I said before, I will be using IR sensors also. Right now I'm using the Interrupt to run them. So I ask another question, Which way is going to be better for my purpose? Which is to make a robot follow a black line with some line sensors from parallax and have a couple of aux outputs. I'm really new at this, and would like the code to be as simple as possible. Thanks again, Lance ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=173464#m173537 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:"Simple" is a very subjective word. I think the ISR code is simple but then, I wrote it and have a bit of practice. The "problem" with servos is that they require refreshing and this can be bothersome for a straight-line program -- like we're forced to do with the BASIC Stamp. I updated my servo program to modulate an IR LED in the ISR and work with just two servos; this should get you going. Your control program can focus on setting servo speed and looking at sensors; the ISR will handle the LED modulation and servo refreshing. If you decide to add another servo you can without expanding the code -- simple adjustments are all that's required to let it handle up to eight servos. Good luck.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Lmiller1708 wrote:Thanks JonnyMac!!

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Capt. Quirk wrote: "bothersome" is right, I find it amazing that you can handle up to 8 servos on 1 SX chip or 4 triggers, 8 outs, 4 servos. The SX-Creeper is another amazing project too. It blows my mind that you can do all that and I can't control a single Futaba servo and take in inputs from 0831 ADC, an RC Circuit, a Count routine that keeps track of 230 pulses/sec and a master contol routine on a single SX, without using up all my variable space or blowing timming of 1 or all the componets I am trying to use together.Your Code example has several routines that look like they prevent routines from running over the top of each other. Could you post (if possible) a flow chart of how that "Prop484-EZ.SXB" works. Thanks ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=173464#m174008 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:Between Halloween industry trade show travels and trying to finish "Practical SX/B" I really don't have time to provide an elaborate explanation here. That code will be fully detailed in the book, however. And... I think if you spend a little time with the code you'll see that it's actually quite easy.

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