REXYGEN Community Forum / PWM frequency

Re: PWM frequency

2016-10-13T05:29:23Z

Hi Mike,
exactly. For such a low frequency you can use any GPIO pin.

Jaroslav

Re: PWM frequency

2016-10-12T20:43:10Z

Thats for the reply Jaroslav,

I will play with the pwm block and let you know how it goes.

Are you saying because of the low frequency I could use any of the GPIO pins? In this case I could save the hardware pwm pin for something that really needs it.

Cheers

Mike

Re: PWM frequency

2016-10-12T11:38:53Z

Hi,
for such a low frequency you can do without hardware PWM. Use a task with 10ms sampling time (this gives you 100 levels within duty cycle of 1s) and put the PWM function block inside. Set pertm=1 (i.e. 1 second, 1 Hz) and you are done. Is there any specific reason to use the hardware PWM?

Hope this helps,
Jaroslav

PWM frequency

2016-10-12T05:52:26Z

I'm playing with the PWM pins on the Raspberry Pi now. How can I lock in a frequency. I need a frequency of 1Hz, with 0-100% duty cycle. Is this possible?

Thanks!