feat(radio): OS compatibility layer (#5840)

radio/src/os/time_freertos.cpp

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) EdgeTX
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "time.h"
+
+#include <FreeRTOS/include/FreeRTOS.h>
+#include <FreeRTOS/include/task.h>
+
+uint32_t time_get_ms()
+{
+  return xTaskGetTickCount() / portTICK_PERIOD_MS;
+}
+
+time_point_t time_point_now()
+{
+  return xTaskGetTickCount();
+}