Help controlling a servo using 16f877a with c language

Can any one help me to build a code using C to control a servo motor?
I got 16f877a,20xtal,PICC compiler, burner, futaba servo. I know how to blink some LED and use a puch button to turn on LEDs but I want to learn more about mcu, I want to turn the servo defending on the position of the potentiometer.
5K POT is connected on A0 of the PIC, push buttons on E0 and B0, port D will be set as output. I can learn from example using C only unfortunately. I hope that someone can make me a code so that I can get started for my project... Thanks in advance!!! I will be posting my project once it is done.

Help please!...

can someone give me a code to control 3 servo motor using pic and with a mikroC codes?thanks..

when ;you get this code please help mee too i am also trying to control the same motor and if i got first then i will give you ok

Check my video if you interested for it, tell me to put code here ( The code is written by MikroC Pro)
YouTube - Servo Motor, Matlab GUI, MikroC PRO & Proteus

Yes.. Eng_Bandar ..I would like to study your circuit and source code. Please help me.

I use this following commands in PIC18F452 and it is OK.
I would like to change to PIC16F877A. How I change this commands?
Please help me if you can. Thank....

tmr0h=0xfc;
tmr0l=0xee;
intcon=0xa0;
t0con=0x87;

I think both 16F877A and 18F452 has all these registers same. So nothing has to be changed.. This will work for 16F877A.

alexisjm_04 said:

Can any one help me to build a code using C to control a servo motor?
I got 16f877a,20xtal,PICC compiler, burner, futaba servo. I know how to blink some LED and use a puch button to turn on LEDs but I want to learn more about mcu, I want to turn the servo defending on the position of the potentiometer.
5K POT is connected on A0 of the PIC, push buttons on E0 and B0, port D will be set as output. I can learn from example using C only unfortunately. I hope that someone can make me a code so that I can get started for my project... Thanks in advance!!! I will be posting my project once it is done.

Help please!...

Click to expand...

chek it, hope help u ...
CCS :: View topic - S/W hangs....

I think both 16F877A and 18F452 has all these registers same. So nothing has to be changed.. This will work for 16F877A.

Click to expand...

Hi gladiss,
thank your reply.
I think..There are different registers.
In..16F877A ..there are no tmr0h (or) tmr0l, only tmr0.
Please How I change..

Thanks for pointing out the difference..

INCON=0xA0
remains the same

T0CON= This register is not available for 16F877A. T0 Prescaler is shared with WDT. So You have to set OPTION_REG.
OPTION_REG=0x87(Assuming you are not using WDT and PortB internal Pullups)

TMR0H= This register is not available for 16F877A.
TMR0L= This register is not available for 16F877A.

Use TMR0. This is an 8 Bit Register. The Value You want to set is 0xFCEE. That means Timer0 has to count upto 0x311, which is not possible.
So you have to do a liitle bit coding in your Timer0 Interrupt Routine.
1. First Set Value TMR0=0xEE
2. Declare a Global Variable, say Timer0TimeOut=0.
3. When TMR0 interrupt Occurs Increment this variable, that means, Timer0TimeOut=Timer0TimeOut+1
4. Check, if(Timer0TimeOut>4) then your time is achieved. Do whatever you want here...
if you require timer operation again,
Reset variable Timer0TimeOut=0
TMR0=0xEE, continue the process...