Astable Multivibrator with PIC microcontroller

[abuhafss]

Hi

I have recently started learning PIC programing.
So far made 2-3 programs, playing with LEDs.
Before proceeding further for pulse generating programs, I have a question:

For a frequency say 1-2KHz, is there any specific keyword to have the required duty cycle & frequency output or we have to manually set the ON period+OFF period to define one cycle and then repeat it? If there is some specific keyword, please let me know.

Thanks.

p.'s. I am using PIC Basic.

 

[PA3040]

Try with to program PWM module
That will help you to achieve your requirement

 

[nxt_]

What type of pic you use? there is a variety of pic micro controllers that contain built-in dedicated PWM modules that work in the background of the program. download device's datasheet and read it carefully.

example: PIC18f452.

 

[abuhafss]

there is a variety of pic micro controllers that contain built-in dedicated PWM modules that work in the background of the program. download device's datasheet and read it carefully.

example: PIC18f452.

I have learnt about HPWM command.............Thanks.

But, can you please explain me how to specify frequency of the pulse train using PWM command. Actually, I could not get the term CYCLE used with the command PWM.

Thanks.

 

[nxt_]

since you already done with HPWM commands, check the timer modules in your device datasheets. as you know frequency is about time taken to finish one complete cycle. actually 3 modules you need to read about carefully

1) HPWM.
2) Timers.
3) interrupts.
that was the hard way;

the easy way..
using basic commands like in proton ide for example
HPWM channel number (1 or 2) , Duty , Frequency
hpwm 1,127,1000 <--- this will start train of pulses on the specified pin with 50% duty cycle and 1 khz frequency.
but you need first to declare the hpwm pin in the start of your program.