Trying to get all 6 pwm outputs on a UNO to run the same frequency.

my testing sketch

include <PWM.h>

int32_t frequency = 3500;

void setup() { InitTimers(); SetPinFrequency(3, frequency); SetPinFrequency(5, frequency); SetPinFrequency(6, frequency); SetPinFrequency(9, frequency); SetPinFrequency(10, frequency); SetPinFrequency(11, frequency);

pwmWrite(3, 50); pwmWrite(5, 50); pwmWrite(6, 50); pwmWrite(9, 50); pwmWrite(10, 50); pwmWrite(11, 50); }

void loop() { delay(100000); }

This works and gives output on port 3,5,9,10 but not on 6 and 11

same result on an genuine UNO R3 and an UNO R1(clone/compatible)

using: Arduino PWM Frequency Library v_05.zip Arduino 1.0.3

The same happens to me, i'm trying to use pin 11 (timer2) on arduino uno R3) and it's not working, on pin3 (that is on timer2 too) works fine

One more information, the return value of SetPinFrequencySafe on pin 11 will be set on false, on pin 3 result return true (and on this one it works fine)

Dear all,

I have the same problem like you guys. I would like to set the frequency of the pwm of pin11, but the library seems not to work. Have you allready found a solution to this problem?

Hope to hear from you. Thanks in advance!

Kind regards,

Jeroen Zegers

^ what i have found after reading enough material that when you use this library (commands of setpinfrequency etc) you have to sacrifice 1 or 2 pwm ports so thats why you are not getting output on the said pins. source:http://forum.arduino.cc/index.php?topic=117425.0