CODEWITHSUNDEEP
micropythonpwmraspberry-pi-pico
Ali Habibnia
Ali Habibnia

Reputation: 21

ValueError: freq too small

I am trying to set up pwm in raspberry pi pico using micropython. everything was ok until I set the frequency to 14,1,2,3,4,5,6,7,9. In these particular frequencies this error will raise: ValueError: freq too small this is my program:

from machine import Pin, PWM
led = PWM(Pin(25))
led.freq(14)
led.duty_u16(32512)

using different duty cycles and pins don't change the result. I tried an older firmware and the latest firmware and there was no difference.

I tried circuitpython on the same board and it worked with no problem in the specified frequencies.

Do you know any solution or reason for this problem?

Upvotes: 2

Views: 352

Answers (1)

adamdport
adamdport

Reputation: 12633

I guess the allowed frequency for the Pico is 8Hz to 62.5MHz. So from your list of values (14,1,2,3,4,5,6,7,9), both 9 and 14 should work fine.

Docs here: https://docs.micropython.org/en/latest/rp2/quickref.html#pwm-pulse-width-modulation

Upvotes: 0

Related Questions