PWM PHASE 120 degrees

Question

Hi, i am using the nRF52dk would and im using the pwm driver example and im trying to understand the way the seq_values void works when it comes to phase or sequence would it be possible to to get some explaining and how it works please. 
 thanks for your help 
 best regards 
 nikolai

Sigurd · Accepted Answer

So with 120 degrees, you are trying to generate the signal shown here? 
 nrf_drv_pwm_config_t const config0 =
 {
 .output_pins =
 {
 BSP_LED_0 | NRF_DRV_PWM_PIN_INVERTED, // channel 0
 BSP_LED_1 | NRF_DRV_PWM_PIN_INVERTED, // channel 1
 NRF_DRV_PWM_PIN_NOT_USED, // channel 2
 NRF_DRV_PWM_PIN_NOT_USED // channel 3
 },
 .irq_priority = APP_IRQ_PRIORITY_LOWEST,
 .base_clock = NRF_PWM_CLK_125kHz,
 .count_mode = NRF_PWM_MODE_UP,
 .top_value = 15625,
 .load_mode = NRF_PWM_LOAD_INDIVIDUAL,
 .step_mode = NRF_PWM_STEP_AUTO
 };
 APP_ERROR_CHECK(nrf_drv_pwm_init(&m_pwm0, &config0, 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_individual_t /*const*/ seq_values[] =
 {
 { 0x8000, 0, 0, 0 },
 { 0, 0x8000, 0, 0 },
 { 0, 0, 0, 0 }
 };
 nrf_pwm_sequence_t const seq =
 {
 .values.p_individual = seq_values,
 .length = NRF_PWM_VALUES_LENGTH(seq_values),
 .repeats = 0,
 .end_delay = 0
 };

 (void)nrf_drv_pwm_simple_playback(&m_pwm0, &seq, 1, NRF_DRV_PWM_FLAG_LOOP);

PWM PHASE 120 degrees

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