Espressif ESP32-S2 - Page 343

Chapter 2. API Reference
Parameters
• pcnt_unit: PCNT unit number, select from pcnt_unit_t
esp_err_t pcnt_intr_enable(pcnt_unit_t pcnt_unit)
Enable PCNT interrupt for PCNT unit.
Note Each Pulse counter unit has five watch point events that share the same interrupt. Configure events with
pcnt_event_enable() and pcnt_event_disable()
Return
• ESP_OK Success
• ESP_ERR_INVALID_STATE pcnt driver has not been initialized
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• pcnt_unit: PCNT unit number
esp_err_t pcnt_intr_disable(pcnt_unit_t pcnt_unit)
Disable PCNT interrupt for PCNT unit.
Return
• ESP_OK Success
• ESP_ERR_INVALID_STATE pcnt driver has not been initialized
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• pcnt_unit: PCNT unit number
esp_err_t pcnt_event_enable(pcnt_unit_t unit, pcnt_evt_type_t evt_type)
Enable PCNT event of PCNT unit.
Return
• ESP_OK Success
• ESP_ERR_INVALID_STATE pcnt driver has not been initialized
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• unit: PCNT unit number
• evt_type: Watch point event type. All enabled events share the same interrupt (one interrupt per
pulse counter unit).
esp_err_t pcnt_event_disable(pcnt_unit_t unit, pcnt_evt_type_t evt_type)
Disable PCNT event of PCNT unit.
Return
• ESP_OK Success
• ESP_ERR_INVALID_STATE pcnt driver has not been initialized
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• unit: PCNT unit number
• evt_type: Watch point event type. All enabled events share the same interrupt (one interrupt per
pulse counter unit).
esp_err_t pcnt_set_event_value(pcnt_unit_t unit, pcnt_evt_type_t evt_type, int16_t value)
Set PCNT event value of PCNT unit.
Return
• ESP_OK Success
• ESP_ERR_INVALID_STATE pcnt driver has not been initialized
• ESP_ERR_INVALID_ARG Parameter error
Parameters
• unit: PCNT unit number
• evt_type: Watch point event type. All enabled events share the same interrupt (one interrupt per
pulse counter unit).
• value: Counter value for PCNT event
esp_err_t pcnt_get_event_value(pcnt_unit_t unit, pcnt_evt_type_t evt_type, int16_t *value)
Get PCNT event value of PCNT unit.
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