Help in Controlling servo using 16F877a

[alexisjm_04]

Can any one help me?
I got a servo motor,16f877a,20MHz xtal,PICC compiler,I have a burner for my PIC and I use C when writing a program. I got a 5k pot connected to pin A0 and I am planning to use port D to control the servo to go left and right when I turn the pot. The problem is I don't know how to start .... I really wanted to learn more about the MCU and I tried blinking LEDs an and using push buttons before, I hope that someone can help me with complete codes so that I can get strated , I can learn form exmaples.Thanks in advance!!

 

[Tahmid]

Hi,
Take a look at these:

http://www.pyroelectro.com/tutorials/servo_motor/index.html
[url]http://www.imagesco.com/articles/picservo/01.html[/url]
[url]http://www.imagesco.com/articles/picservo/02.html[/url]
[url]http://www.rentron.com/SerialServo.htm[/url]
[url]http://www.rentron.com/PICX5.htm[/url]
[url]http://www.mcmanis.com/chuck/robotics/projects/servo.html[/url]
[I]**broken link removed**[/I]
[url]http://www.best-microcontroller-projects.com/servo-motor.html[/url]

Hope this helps.
Tahmid.

 

[alexisjm_04]

I tried to review the links that you gave but they are all using ASM, can you help me to build my project usign C? I got a picture here and my codes. I'm not sure if it is correct.

 

[alexisjm_04]

Hi,

Here is my code I just copied it and it seams that it only display the value of the adc on port D , hope you can help me, thanks in advance!

#include <16f877.H>

#fuses xt,noPROTECT,noWDT,noPUT,noBROWNOUT,nolvp,nowrt

#use delay(clock=20000000)

#use standard_io(a) // set io port a
#use standard_io(b) // set io port b
#use standard_io(c) // set io port c
#use standard_io(d) // set io port d
#use rs232(baud=9600, xmit=pin_c6, rcv=pin_c7) // set rs232 port

main(){
int value; // aset up storage in memory
setup_port_a(ALL_ANALOG); // se port a to all analoges
setup_adc(adc_clock_div_2); // set up adc
setup_timer_2(T2_div_by_4,0xc0,2); // initialize timer 2
setup_ccp1(ccp_pwm); 

while (1) 
{
set_adc_channel(0); // adc A0
delay_us (5); 
value= read_adc(); 
delay_ms (100); 

output_d(value);

}
}