Updated README - general refresh

README.md

@@ -8,26 +8,30 @@
 
 This repository holds the [PX4](http://px4.io) flight control solution for drones, with the main applications located in the [src/modules](https://github.com/PX4/PX4-Autopilot/tree/master/src/modules) directory. It also contains the PX4 Drone Middleware Platform, which provides drivers and middleware to run drones.
 
+PX4 is highly portable, OS-independent and supports Linux, NuttX and QuRT out of the box.
+
 * Official Website: http://px4.io (License: BSD 3-clause, [LICENSE](https://github.com/PX4/PX4-Autopilot/blob/master/LICENSE))
 * [Supported airframes](https://docs.px4.io/master/en/airframes/airframe_reference.html) ([portfolio](http://px4.io/#airframes)):
-  * [Multicopters](https://docs.px4.io/master/en/airframes/airframe_reference.html#copter)
-  * [Fixed wing](https://docs.px4.io/master/en/airframes/airframe_reference.html#plane)
-  * [VTOL](https://docs.px4.io/master/en/airframes/airframe_reference.html#vtol)
-  * many more experimental types (Rovers, Blimps, Boats, Submarines, Autogyros, etc)
+  * [Multicopters](https://docs.px4.io/master/en/frames_multicopter/)
+  * [Fixed wing](https://docs.px4.io/master/en/frames_plane/)
+  * [VTOL](https://docs.px4.io/master/en/frames_vtol/)
+  * [Autogyro](https://docs.px4.io/master/en/frames_autogyro/)
+  * [Rover](https://docs.px4.io/master/en/frames_rover/)
+  * many more experimental types (Blimps, Boats, Submarines, Autogyros, etc)
 * Releases: [Downloads](https://github.com/PX4/PX4-Autopilot/releases)
 
 
-## PX4 Users
+## Building a PX4 based drone, rover, boat or robot
 
 The [PX4 User Guide](https://docs.px4.io/master/en/) explains how to assemble [supported vehicles](https://docs.px4.io/master/en/airframes/airframe_reference.html) and fly drones with PX4.
 See the [forum and chat](https://docs.px4.io/master/en/#support) if you need help!
 
 
-## PX4 Developers
+## Changing code and contributing
 
-This [Developer Guide](https://dev.px4.io/) is for software developers who want to modify the flight stack and middleware (e.g. to add new flight modes), hardware integrators who want to support new flight controller boards and peripherals, and anyone who wants to get PX4 working on a new (unsupported) airframe/vehicle.
+This [Developer Guide](https://docs.px4.io/master/en/development/development.html) is for software developers who want to modify the flight stack and middleware (e.g. to add new flight modes), hardware integrators who want to support new flight controller boards and peripherals, and anyone who wants to get PX4 working on a new (unsupported) airframe/vehicle.
 
-Developers should read the [Guide for Contributions](https://dev.px4.io/master/en/contribute/).
+Developers should read the [Guide for Contributions](https://docs.px4.io/master/en/contribute/).
 See the [forum and chat](https://dev.px4.io/master/en/#support) if you need help!
 
 
@@ -69,38 +73,44 @@ The PX4 Dev Team syncs up on a [weekly dev call](https://dev.px4.io/master/en/co
     * [Daniel Agar](https://github.com/dagar)
   * [State Estimation](https://github.com/PX4/PX4-Autopilot/issues?q=is%3Aopen+is%3Aissue+label%3A%22state+estimation%22)
     * [Paul Riseborough](https://github.com/priseborough)
-  * Vision based navigation
-    * [Julian Kent](https://github.com/jkflying)
-  * Obstacle Avoidance
-    * [Martina Rivizzigno](https://github.com/mrivi)
+  * Vision based navigation and Obstacle Avoidance
+    * [Markus Achtelik](https://github.com/markusachtelik)
   * RTPS/ROS2 Interface
     * [Nuno Marques](https://github.com/TSC21)
 
 See also [maintainers list](https://px4.io/community/maintainers/) (px4.io) and the [contributors list](https://github.com/PX4/PX4-Autopilot/graphs/contributors) (Github).
 
 ## Supported Hardware
 
-This repository contains code supporting these boards:
+This repository contains code supporting Pixhawk standard boards (best supported, best tested, recommended choice) and proprietary boards.
+
+### Pixhawk Standard Boards
   * FMUv2
     * [Pixhawk](https://docs.px4.io/master/en/flight_controller/pixhawk.html)
     * [Pixfalcon](https://docs.px4.io/master/en/flight_controller/pixfalcon.html)
   * FMUv3
     * [Pixhawk 2](https://docs.px4.io/master/en/flight_controller/pixhawk-2.html)
     * [Pixhawk Mini](https://docs.px4.io/master/en/flight_controller/pixhawk_mini.html)
     * [CUAV Pixhack v3](https://docs.px4.io/master/en/flight_controller/pixhack_v3.html)
-  * FMUv4
+  * FMUv4 (STM32F4)
     * [Pixracer](https://docs.px4.io/master/en/flight_controller/pixracer.html)
     * [Pixhawk 3 Pro](https://docs.px4.io/master/en/flight_controller/pixhawk3_pro.html)
-  * FMUv5 (ARM Cortex M7)
+  * FMUv5 (STM32F7)
     * [Pixhawk 4](https://docs.px4.io/master/en/flight_controller/pixhawk4.html)
     * [Pixhawk 4 mini](https://docs.px4.io/master/en/flight_controller/pixhawk4_mini.html)
     * [CUAV V5+](https://docs.px4.io/master/en/flight_controller/cuav_v5_plus.html)
     * [CUAV V5 nano](https://docs.px4.io/master/en/flight_controller/cuav_v5_nano.html)
+  * FMUv6X and FMUv6U (STM32H7)
+    * Various vendors will provide FMUv6X and FMUv6U based designs Q2/2021
+
+### Manufacturer and Community supported
+  * [Holybro Durandal](https://docs.px4.io/master/en/flight_controller/durandal.html)
+  * [Hex Cube Orange](https://docs.px4.io/master/en/flight_controller/cubepilot_cube_orange.html)
+  * [Hex Cube Yellow](https://docs.px4.io/master/en/flight_controller/cubepilot_cube_yellow.html)
   * [Airmind MindPX V2.8](http://www.mindpx.net/assets/accessories/UserGuide_MindPX.pdf)
   * [Airmind MindRacer V1.2](http://mindpx.net/assets/accessories/mindracer_user_guide_v1.2.pdf)
   * [Bitcraze Crazyflie 2.0](https://docs.px4.io/master/en/flight_controller/crazyflie2.html)
   * [Omnibus F4 SD](https://docs.px4.io/master/en/flight_controller/omnibus_f4_sd.html)
-  * [Holybro Durandal](https://docs.px4.io/master/en/flight_controller/durandal.html)
   * [Holybro Kakute F7](https://docs.px4.io/master/en/flight_controller/kakutef7.html)
   * [Raspberry PI with Navio 2](https://docs.px4.io/master/en/flight_controller/raspberry_pi_navio2.html)