Subject:
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Re: Problem in program
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 2 May 1997 10:36:45 GMT
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Original-From:
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Terry P. Gathright <669@POSTOFFICE.nomorespamWORLDNET.ATT.NET>
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Viewed:
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1823 times
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King, Terry wrote:
>
> Greetings everyone!
> I'm working on a navigation program that has a funny quirk in it. I'm
> hoping one of you IC pros can explain my error. As far as reading the
> info from the sensors (RS 40 Khz IR module) and activating the motor
> ports, it works fine. The strange thing is that the printf statements
> "Left object detected" and "Right object detected" don't always print to
> the LCD even though the digital port responded properly by activating
> the motor port. Several repeated triggerings will eventually result in
> the proper statement,but with no definitive pattern. If one of the
> statements does appear and then the other dig port is triggered, the
> other statement does not always "flip".
>
> The "Object Ahead" statement always responds. By no means are these
> statements crucial to my project, but I have the need to understand what
> I'm doing wrong. Is there some kind of precedence statement I need to
> include or what?
>
> Here is the program:
>
> void main (){
> printf ("NAV. TEST\n");
> fd(0); /* Left caterpillar
> drive */
> fd(2); /* Right
> caterpillar drive */
> while(1) {
> while (digital (15)) /* Left sensor */
> bk(2);
> if (digital (15)) printf ("Left object detected\n");
> else fd(2);
> while (digital (14)) /* Right sensor */ /* Line 10
> */
> bk(0);
> if (digital (14)) printf ("Right object detected\n");
> else fd(0);
> while (digital (13)) /* Front sensor */
> if (digital (13)){ printf ("Object ahead\n");
> ao();
> sleep(1.0);
> bk(0);
> bk(2);
> sleep(1.0); /* Experimental-protect
> gears*/
> fd(0);
> bk(2);
> sleep(1.0);}
> else{
> fd(0);
> fd(2);}
> }
> }
>
> Thanks for any ideas,
> Terry King
> Terry.King@fmr.com
Terry,
Try putting a sleep(.1); statement after the printf statements
the board may be working to fast to read the LCD.
Terry Gathright
669@worldnet.att.net
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Message is in Reply To:
 | | Problem in program
|
| Greetings everyone! I'm working on a navigation program that has a funny quirk in it. I'm hoping one of you IC pros can explain my error. As far as reading the info from the sensors (RS 40 Khz IR module) and activating the motor ports, it works (...) (29 years ago, 1-May-97, to lugnet.robotics.handyboard)
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