Cannot initialize a third PWM function on Seeeduino XIAO using Circuit Python

Question

I have a Seeed Studio XIAO SAMD21(Seeeduino XIAO) - Arduino Microcontroller. I want to have three pins put out a frequency using PWM. I am trying to use the below code. If I comment out one of DOut2, Dout3, or Dout4; the code runs and the two pins output the correct signal. However, when I have all three DOuts, I get the following error: RuntimeError: All timers in use. Any advice is appreciated.

#Seeeduino XIAO Program (to run on microcontroller)
import supervisor
import time
import board
import digitalio
import pwmio
import analogio

if __name__ == "__main__":
    frequency = 25
    DOut2 = pwmio.PWMOut(board.D2, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut3 = pwmio.PWMOut(board.D3, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut4 = pwmio.PWMOut(board.D4, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)

    DOut2 = pwmio.PWMOut(board.D2, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    #DOut3 = pwmio.PWMOut(board.D3, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut4 = pwmio.PWMOut(board.D4, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)

Works

    DOut2 = pwmio.PWMOut(board.D2, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut3 = pwmio.PWMOut(board.D3, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    #DOut4 = pwmio.PWMOut(board.D4, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)

Works

    #DOut2 = pwmio.PWMOut(board.D2, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut3 = pwmio.PWMOut(board.D3, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut4 = pwmio.PWMOut(board.D4, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)

Works

    DOut2 = pwmio.PWMOut(board.D2, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut3 = pwmio.PWMOut(board.D3, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)
    DOut4 = pwmio.PWMOut(board.D4, duty_cycle = 32767, frequency = int(frequency), variable_frequency = True)

Gives 'RuntimeError: All timers in use'

Cannot initialize a third PWM function on Seeeduino XIAO using Circuit Python

0 Answers0