Configure PWM driver to have similar behaviour as an Arduino analogWrite()

Question

Hi, 
 I'm interested in passing a PWM wave form to drive a motor using an Allegro A4963 . There exists an Arduino library that does just that and in order to set speed they perform an " analogWrite() " on a certain speed. 
 How do I use the PWM driver to implement the same behavior ? 
 PS: I'm using an nRF52840-DK

Or · Answer

Following code seems to be doing the job: 
 nrf_drv_pwm_config_t config =
 {
 // These are the common configuration options we use for all PWM
 // instances.
 .irq_priority = APP_IRQ_PRIORITY_LOWEST,
 .count_mode = NRF_PWM_MODE_UP,
 .step_mode = NRF_PWM_STEP_AUTO,
 };

config.output_pins[0] = BSP_LED_0 | NRF_DRV_PWM_PIN_INVERTED;
config.output_pins[1] = NRF_DRV_PWM_PIN_NOT_USED;
config.output_pins[2] = NRF_DRV_PWM_PIN_NOT_USED;
config.output_pins[3] = NRF_DRV_PWM_PIN_NOT_USED;
config.base_clock = NRF_PWM_CLK_125kHz;
config.top_value = 255;
config.load_mode = NRF_PWM_LOAD_COMMON;
RETURN_ON_ERROR(nrf_drv_pwm_init(&m_pwm0, &config, NULL));

// This array cannot be allocated on stack (hence "static") and it must
// be in RAM (hence no "const", though its content is not changed).
static nrf_pwm_values_common_t /*const*/ pwm0_seq_values[1];
pwm0_seq_values[0] = value; // ** this is the value passed to "analogWrite()" **

nrf_pwm_sequence_t const pwm0_seq =
{
	.values.p_common = pwm0_seq_values,
	.length = NRF_PWM_VALUES_LENGTH(pwm0_seq_values),
	.repeats = 1,
	.end_delay = 0
};

nrf_drv_pwm_simple_playback(&m_pwm0, &pwm0_seq, 1, NRF_DRV_PWM_FLAG_LOOP);