espradio: implement support for wifi/BLE on the ESP32-C3

This is a work in progress. It does not yet work.

espradio/blobs/headers/esp_event_base.h

@@ -0,0 +1,35 @@
+/*
+ * SPDX-FileCopyrightText: 2018-2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ESP_EVENT_BASE_H_
+#define ESP_EVENT_BASE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Defines for declaring and defining event base
+#define ESP_EVENT_DECLARE_BASE(id) extern esp_event_base_t const id
+#define ESP_EVENT_DEFINE_BASE(id) esp_event_base_t const id = #id
+
+// Event loop library types
+typedef const char*  esp_event_base_t; /**< unique pointer to a subsystem that exposes events */
+typedef void*        esp_event_loop_handle_t; /**< a number that identifies an event with respect to a base */
+typedef void         (*esp_event_handler_t)(void* event_handler_arg,
+                                        esp_event_base_t event_base,
+                                        int32_t event_id,
+                                        void* event_data); /**< function called when an event is posted to the queue */
+typedef void*        esp_event_handler_instance_t; /**< context identifying an instance of a registered event handler */
+
+// Defines for registering/unregistering event handlers
+#define ESP_EVENT_ANY_BASE     NULL             /**< register handler for any event base */
+#define ESP_EVENT_ANY_ID       -1               /**< register handler for any event id */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // #ifndef ESP_EVENT_BASE_H_