motor' pwm control according to switch value

[nudrat]

hi everyone!

I want to start and stop pwm(which drives a motor) according to the value of switch.
Motor is on portc(RC2) and switch is on RB0.
I am using pic16f877a and software is mikroc.
Can anybody help me in writing c code?

 

[AliRazoR]

did you check HELP of mikroc?(search PWM)

 

[Tahmid]

Hi,
Take a look at the help section in mikroC and the PWM library functions. Are you clear regarding how to check the state of an input pin?
After taking a look at the library, please come here and I'll help with the coding.

Tahmid.

 

[nudrat]

@tahmid thanks.
I generated PWM on portc and motor rotates well.
My problem is that i am using an NPN transistor as a switch on PORTB.0. and want that if value of NPN switch is 1 the motor starts and if its value is 0, motor stops.
I tried so much but once motor starts it dont stop weather i change the value of switch.

 

[DineshSL]

Hi,

Can you show schematic; your problem may be there (transistor doesn't bias ?,Check V at input pin of uC).
May be your code has a bug. It doesn't response to input.

Thanks,

 

[Tahmid]

Hi,
In the code, to stop PWM, use

PWM_Stop()

or

PWM1_Stop()

, whichever is necessary.

Hope this helps.
Tahmid.