I am trying to set a PWM signal on a GPIO pin on the Seeed Stuido XIAO BLE board.

To my understanding:

• I would need to get an instance of the PWM Driver using NRFX_PWM_INSTANCE
• Configure the PWM signal using the nrfx_pwm_config_t type.
• Initialize the PWM driver using nrfx_pwm_init
• Configure the nrf_pwm_sequence_t type for the pwm generations
• Use nrfx_pwm_simple_playback to generate the wave

I am getting a NRFX_ERROR_INVALID_STATE when I initialize the PWM driver. Does anyone know what the direct cause of this error is? To my understanding it is due to when the PWM driver is in a state and an invalid operation is used on it. However at this point of the code I am not applying an operation that is not used in the default config code that is available in the library.

The below is my code for the main script:

int main(void)
{
    k_sleep(K_SECONDS(3));

    int err; 
    int blink_status = 0;

    err = dk_leds_init();
    if (err) {
        printk("LEDs init failed (err %d)n", err);
    }
    nrfx_pwm_t pwm0 = NRFX_PWM_INSTANCE(0);

    nrfx_pwm_config_t pwm0_config = {
        .output_pins = {
            2,
            0xFF,
            0xFF, 
            0xFF,
        },

        .pin_inverted = {
            false, 
            false, 
            false, 
            false,
        },
        .irq_priority = NRFX_PWM_DEFAULT_CONFIG_IRQ_PRIORITY,
        .base_clock = NRF_PWM_CLK_16MHz,
        .count_mode = NRF_PWM_MODE_UP,
        .top_value = PWM_TOP_VALUE,
        .load_mode = NRF_PWM_LOAD_COMMON,
        .step_mode = NRF_PWM_STEP_AUTO, //need to set the repeat value to one so this moves every time through the memory. 
        .skip_gpio_cfg = false,
        .skip_psel_cfg = false
    };

    err = nrfx_pwm_init(&pwm0,&pwm0_config,NULL,NULL);
    if (err != NRFX_SUCCESS){
        printk("Error Occured when initializing the pwm: %dn", err);
    }

    nrf_pwm_values_common_t* pulse_array = (nrf_pwm_values_common_t*)malloc(PWM_ARRAY_SIZE * sizeof(nrf_pwm_values_common_t));
    if (pulse_array == NULL) {
        printk("Error occured when intializing the pulse array in memoryn");
    }

    for (int i = 0; i < PWM_ARRAY_SIZE-1; i++){
        pulse_array[i] = PWM_0;
    }

    pulse_array[PWM_ARRAY_SIZE-1] = 0;
    
    nrf_pwm_sequence_t pw0_seq_config = {
        .values = pulse_array, //this is suppose to be a 16 bit value but lets see how a 8 bit value impacts
        .length = PWM_ARRAY_SIZE,
        .repeats = 0, //only play the duty cycle in each cell once. 
        .end_delay = RESET_CODE_DURATION,
    };

    nrfx_pwm_simple_playback(&pwm0, &pw0_seq_config, 1, NRFX_PWM_FLAG_LOOP);

    for (;;) {
        dk_set_led(RUN_STATUS_LED, (++blink_status) % 2);
        k_sleep(K_MSEC(RUN_LED_BLINK_INTERVAL));
    }

    return 0; 
}

The below is my configuration file code:

CONFIG_PWM=y
CONFIG_NRFX_PWM0=y
CONFIG_NRFX_PWM1=y
CONFIG_PWM_NRFX=y
CONFIG_COMMON_LIBC_MALLOC=y
CONFIG_DK_LIBRARY=y

Can anyone provide insight as to what the INVALID STATE Error could be referring to?

thank you in advance