servo with pic16f877a

[luvuslim]

I have a dys0213 servo motor interfaced to port a of pic16f877a . Below is the code

#include<16f877a.h>
#use delay(clock=20000000)
void main()
{
  setup_adc_ports(NO_ANALOGS);
set_tris_a(0x00);
output_a(0x00);
while(1)
 {
output_high(PIN_A1);
 delay_us (1345);
  output_LOW(PIN_A1);
 delay_ms (18 );
}
}
[\code]
this code works perfect in proteus but actual motor never moves it just vibrates as soon as it is turned on...plz help

 

[enjunear]

It sounds like your duty cycle is not set up correctly. Disconnect the motor from the PIC, grab an oscilloscope and look at the signal on the output pin. Verify that your pulse timing is correct for the servo you are driving. Then reconnect the motor, and look at the signal on the output pin again. Make sure that the signal still looks correct, and it's not being loaded down by something on your attached circuit.

 

[luvuslim]

I had this solution in mind but i don't have an oscilloscope.Thanx anyways..