[En-Nut-Discussion] RE: PWM

[Nic Cave-Lynch]

What pulse width resolution do you need, and what frequency? Are you doing all 
the PID stuff in the Ethernut, or just sending a pwm code to something like 
standard RC servos used in model cars/planes/yachts/...?

Raul Valle wrote:
> Curtis thanks for  the reply:
> 
> The thing is the channels available are not enough, there are more servos to control......they are going to be controlled by a command sent to them from the computer .... any idea in how to achieve to control all the servos not affecting program please let me know... I appriciate the help./
> 
> ---------------------------------------------------
> Raul Valle wrote:
>> hi to all:
>> can someone give me an idea on how to make a servo function on ethernut1.3 .
>> The one i did i dont know exactly why is not working . here is the code:
>> pos++;
>>        sbi(PORTE,2);         
>>        for(i=0;i<pos;i++){
>>         NutSleep(.02);
>>        }
>>    
>>        cbi(PORTE,2);
>>        for(b=0;i<(1500-pos);b++){    
>>         NutSleep(.02);
> 
> Is there a particular reason you're avoiding using the hardware PWM?  They'd be 
> much simpler, more accurate, and would take no CPU time once set up.
> 
> Of course, if they're all already in use, or you have to use a pin they can't 
> control, I'll understand.
> 
> --
> Curtis Maloney
> cmaloney at cardgate.net
> 
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