Board with 6 digital pins for PWM

Official Hardware Mega Due
1

Hello,

Im looking for Arduino with 6 pins for PWM. I need 50 khz and 50 % duty cycle.

I have been using Arduino due, but i found out that only pins 7,8,9 are connected to PWM controller and the frequency there is ok. I have issue with the others ( or duty cycle or frequency is not ok). I must have dephasing, which reduces the frequency more.

So my question is: there is another board with 6 such pins that could help me?

Thank you in advance and best Regards,

2

According to documentation, Arduino Due has 25 PWM pins in total - for example all pins between 2 and 13 are PWM

Even ordinal Arduino Uno has 6 PWM pins

3

But only on 7,8,9 if i could measured this frequency. On the other is significantly lower, also and duty cycle.

4

Are you using a multimeter to check if pwm is working, if so you may not get accurate readings unless it is a really high quality one. Also DMM's usually have a low sampling rate so it may not even pick the signal.
Also try testing by connecting an LED.

PS: Please check the category, you are using the wrong category. Please don't use uncategorised

5

Could you show a code example how did you tried to generate a PWM?

6

I moved the topic to a more appropriate forum category as requested.

Carry on.

7 
#include <Arduino.h>

#define PWM_FREQUENCY 50000 // 50 kHz
#define PWM_RESOLUTION 255 // 8-bit resolution (0-255 padding)

// PWM pins
const int pwmPins[] = {6, 7, 8, 9, 5, 34}; // Add 5 and 34

void setup() {
    // Enable peripheral and setup pins
    pmc_enable_periph_clk(PWM_INTERFACE_ID); // Enable the clock signal for the PWM controller
    PWMC_ConfigureClocks(PWM_FREQUENCY * PWM_RESOLUTION, 0, VARIANT_MCK); // Setting CLKA

    // Configure each of the six pins
    for (int i = 0; i < 6; i++) {
        configurePWM(pwmPins[i], 50); // 50% fill
    }
}

void loop() {
    // Main loop remains empty, PWM signals are automatically generated
}

// PWM channel configuration function for a given pin
void configurePWM(int pin, int dutyCycle) {
    uint32_t pwmDuty = (dutyCycle * PWM_RESOLUTION) / 100; // Convert the fill to an 8-bit value

    // Connecting the pin to the PWM controller
    PIO_Configure(g_APinDescription[pin].pPort,
                  g_APinDescription[pin].ulPinType,
                  g_APinDescription[pin].ulPin,
                  g_APinDescription[pin].ulPinConfiguration);

    uint32_t channel = g_APinDescription[pin].ulPWMChannel; // Get PWM channel
    PWMC_ConfigureChannel(PWM, channel, PWM_CMR_CPRE_CLKA, 0, 0); // Channel configuration (CLKA as source)
    PWMC_SetPeriod(PWM, channel, PWM_RESOLUTION); // Period setting
    PWMC_SetDutyCycle(PWM, channel, pwmDuty); // Fill setting
    PWMC_EnableChannel(PWM, channel); // Enable channel
}

Is that. 6,7,8,9 are okay but - 2 left without PWM. How to make it. After that would be have dephasing.

8

Could you show the link that you use as documentation source about PWMC_* configuration methods?

9

SAM3X8E Datasheet(PDF) - ATMEL Corporation

Or Im wrong?

10

The datasheet doesn't contatins a software methods.

What I asked - what the library do you use to work with PWM?

11

I have used also and PWM.h, but exactly for that

12

Could you print the value of PWM_CMR_CPRE_CLKA that you used in your configurePWM()

13

Reading the docs, I think there are problems with pins 5 and 34 as PWM. I am not ready now to say exactly what the issue, but...
Please try to use another pins, say 36 and 43

14

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