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diff --git a/ChibiOS_20.3.2/os/various/evtimer.h b/ChibiOS_20.3.2/os/various/evtimer.h
new file mode 100644
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+++ b/ChibiOS_20.3.2/os/various/evtimer.h
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+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    evtimer.h
+ * @brief   Events Generator Timer structures and macros.
+ *
+ * @addtogroup event_timer
+ * @{
+ */
+
+#ifndef EVTIMER_H
+#define EVTIMER_H
+
+/*===========================================================================*/
+/* Module constants.                                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks.                                       */
+/*===========================================================================*/
+
+/*
+ * Module dependencies check.
+ */
+#if !CH_CFG_USE_EVENTS
+#error "Event Timers require CH_CFG_USE_EVENTS"
+#endif
+
+/*===========================================================================*/
+/* Module data structures and types.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief   Type of a event timer structure.
+ */
+typedef struct {
+  virtual_timer_t       et_vt;
+  event_source_t        et_es;
+  systime_t             et_interval;
+} event_timer_t;
+
+/*===========================================================================*/
+/* Module macros.                                                            */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void evtObjectInit(event_timer_t *etp, systime_t time);
+  void evtStart(event_timer_t *etp);
+#ifdef __cplusplus
+}
+#endif
+
+/*===========================================================================*/
+/* Module inline functions.                                                  */
+/*===========================================================================*/
+
+/**
+ * @brief   Stops the timer.
+ * @details If the timer was already stopped then the function has no effect.
+ *
+ * @param[in] etp       pointer to an initialized @p event_timer_t structure.
+ */
+static inline void evtStop(event_timer_t *etp) {
+
+  chVTReset(&etp->et_vt);
+}
+
+#endif /* EVTIMER_H */
+
+/** @} */