feat(mcpwm): ETM support mcpwm timer TEZ/TEP events

components/esp_driver_mcpwm/include/driver/mcpwm_etm.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2022-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -23,6 +23,13 @@ typedef struct {
     mcpwm_comparator_etm_event_type_t event_type; /*!< MCPWM comparator ETM event type */
 } mcpwm_cmpr_etm_event_config_t;
 
+/**
+ * @brief MCPWM timer ETM event configuration
+ */
+typedef struct {
+    mcpwm_timer_etm_event_type_t event_type; /*!< MCPWM timer ETM event type */
+} mcpwm_timer_etm_event_config_t;
+
 /**
  * @brief Get the ETM event for MCPWM comparator
  *
@@ -38,6 +45,21 @@ typedef struct {
  */
 esp_err_t mcpwm_comparator_new_etm_event(mcpwm_cmpr_handle_t cmpr, const mcpwm_cmpr_etm_event_config_t *config, esp_etm_event_handle_t *out_event);
 
+/**
+ * @brief Get the ETM event for MCPWM timer
+ *
+ * @note The created ETM event object can be deleted later by calling `esp_etm_del_event`
+ *
+ * @param[in] timer MCPWM timer, allocated by `mcpwm_new_timer()`
+ * @param[in] config MCPWM ETM timer event configuration
+ * @param[out] out_event Returned ETM event handle
+ * @return
+ *      - ESP_OK: Get ETM event successfully
+ *      - ESP_ERR_INVALID_ARG: Get ETM event failed because of invalid argument
+ *      - ESP_FAIL: Get ETM event failed because of other error
+ */
+esp_err_t mcpwm_timer_new_etm_event(mcpwm_timer_handle_t timer, const mcpwm_timer_etm_event_config_t *config, esp_etm_event_handle_t *out_event);
+
 #ifdef __cplusplus
 }
 #endif

components/esp_driver_mcpwm/include/driver/mcpwm_timer.h

@@ -34,7 +34,7 @@ typedef struct {
     uint32_t resolution_hz;              /*!< Counter resolution in Hz
                                               The step size of each count tick equals to (1 / resolution_hz) seconds */
     mcpwm_timer_count_mode_t count_mode; /*!< Count mode */
-    uint32_t period_ticks;               /*!< Number of count ticks within a period */
+    uint32_t period_ticks;               /*!< Number of count ticks within a period. For up-down mode, the timer peak value is half of the period_ticks */
     int intr_priority;                   /*!< MCPWM timer interrupt priority,
                                               if set to 0, the driver will try to allocate an interrupt with a relative low priority (1,2,3) */
     struct {