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???
01/17/10 21:27
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 		 #172523 - executing code takes time
Responding to: ???'s previous message
However, I noticed that the above code works seamlessly only for 3 servo motors. If I try to interface even a single motor more to the above code, the other servos start behaving erratically.
What could be the problem?

executing code takes time and, for apps like this, you may eventually run out of time.

servo d can only wait a finite time before being serviced and at some times the confluence of handling servos a, b and c will just take enough time to make the handling of servo d happen too late.

get a faster processor (e.g. a SILabs f12x/f13x) or farm it out to multiple processors.

Erik

List of 41 messages in thread
TopicAuthorDate
Controlling multiple servo motors            01/01/70 00:00      
   executing code takes time            01/01/70 00:00      
      PWM code            01/01/70 00:00      
         Thanks...now, about the PCA timer..            01/01/70 00:00      
   If SDCC Then Keil            01/01/70 00:00      
      PWM IRQ code in C, bitops, 45 byte            01/01/70 00:00      
         Optimization having no effect.            01/01/70 00:00      
      PWM IRQ code in C, lookup table, 32 byte            01/01/70 00:00      
         I haven't understood the table lookup concept very well...            01/01/70 00:00      
            table lookup            01/01/70 00:00      
         PWM IRQ code in C, lookup table, 30 byte            01/01/70 00:00      
            Compiler specifics            01/01/70 00:00      
               absolutely-locating xdata at 256 byte boundary            01/01/70 00:00      
                  I see.            01/01/70 00:00      
            An example code..            01/01/70 00:00      
               Keil: Specifics and non-specifics            01/01/70 00:00      
                  Not really working...            01/01/70 00:00      
                     Enough power?            01/01/70 00:00      
                        RE: running 32 servo motors            01/01/70 00:00      
      The chip sounds perfect...            01/01/70 00:00      
         not worth it            01/01/70 00:00      
            Servo control will become difficult then...            01/01/70 00:00      
               output            01/01/70 00:00      
               HCT chips have ...            01/01/70 00:00      
                  Eval a concept with a single PCA and 3:8 HCT multiplexer?            01/01/70 00:00      
               Check their website            01/01/70 00:00      
                  Here is the code...            01/01/70 00:00      
                     "sbit MTRS=P2^0;" is not OK here            01/01/70 00:00      
                        Keil syntax?            01/01/70 00:00      
                           "#define" not working.."sbit" works            01/01/70 00:00      
                              Yes, you were correct originally!            01/01/70 00:00      
            Seconded            01/01/70 00:00      
   Servo_0.1.zip            01/01/70 00:00      
      links            01/01/70 00:00      
   Eventually feed the guys at http://servomaster.sf.net ?            01/01/70 00:00      
      servomaster.sf.net FLOSS            01/01/70 00:00      
   Maybe of some use...            01/01/70 00:00      
      Whoops... found a bug            01/01/70 00:00      
         What bug?            01/01/70 00:00      
            Bug            01/01/70 00:00      
   Improved version uploaded            01/01/70 00:00      

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