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+# [MCUboot](http://mcuboot.com/)
+
+[![Package on PyPI](https://img.shields.io/pypi/v/imgtool.svg)][pypi]
+[![Coverity Scan Build Status](https://scan.coverity.com/projects/12307/badge.svg)][coverity]
+[![Build Status (Sim)](https://github.com/mcu-tools/mcuboot/workflows/Sim/badge.svg)][sim]
+[![Build Status (Mynewt)](https://github.com/mcu-tools/mcuboot/workflows/Mynewt/badge.svg)][mynewt]
+[![Build Status (Espressif)](https://github.com/mcu-tools/mcuboot/workflows/Espressif/badge.svg)][espressif]
+[![Publishing Status (imgtool)](https://github.com/mcu-tools/mcuboot/workflows/imgtool/badge.svg)][imgtool]
+[![Build Status (Travis CI)](https://img.shields.io/travis/mcu-tools/mcuboot/main.svg?label=travis-ci)][travis]
+[![Apache 2.0](https://img.shields.io/badge/License-Apache%202.0-blue.svg)][license]
+
+[pypi]: https://pypi.org/project/imgtool/
+[coverity]: https://scan.coverity.com/projects/mcuboot
+[sim]: https://github.com/mcu-tools/mcuboot/actions?query=workflow:Sim
+[mynewt]: https://github.com/mcu-tools/mcuboot/actions?query=workflow:Mynewt
+[espressif]: https://github.com/mcu-tools/mcuboot/actions?query=workflow:Espressif
+[imgtool]: https://github.com/mcu-tools/mcuboot/actions?query=workflow:imgtool
+[travis]: https://travis-ci.org/mcu-tools/mcuboot
+[license]: https://github.com/mcu-tools/mcuboot/blob/main/LICENSE
+
+This is MCUboot version 2.1.0
+
+MCUboot is a secure bootloader for 32-bits microcontrollers. It defines a
+common infrastructure for the bootloader and the system flash layout on
+microcontroller systems, and provides a secure bootloader that enables easy
+software upgrade.
+
+MCUboot is not dependent on any specific operating system and hardware and
+relies on hardware porting layers from the operating system it works with.
+Currently, MCUboot works with the following operating systems and SoCs:
+- [Zephyr](https://www.zephyrproject.org/)
+- [Apache Mynewt](https://mynewt.apache.org/)
+- [Apache NuttX](https://nuttx.apache.org/)
+- [RIOT](https://www.riot-os.org/)
+- [Mbed OS](https://os.mbed.com/)
+- [Espressif](https://www.espressif.com/)
+- [Cypress/Infineon](https://www.cypress.com/)
+
+RIOT is supported only as a boot target. We will accept any new
+port contributed by the community once it is good enough.
+
+## MCUboot How-tos
+
+See the following pages for instructions on using MCUboot with different
+operating systems and SoCs:
+- [Zephyr](docs/readme-zephyr.md)
+- [Apache Mynewt](docs/readme-mynewt.md)
+- [Apache NuttX](docs/readme-nuttx.md)
+- [RIOT](docs/readme-riot.md)
+- [Mbed OS](docs/readme-mbed.md)
+- [Espressif](docs/readme-espressif.md)
+- [Cypress/Infineon](boot/cypress/README.md)
+
+There are also instructions for the [Simulator](sim/README.rst).
+
+## Roadmap
+
+The issues being planned and worked on are tracked using GitHub issues. To
+give your input, visit [MCUboot GitHub
+Issues](https://github.com/mcu-tools/mcuboot/issues).
+
+## Source files
+
+You can find additional documentation on the bootloader in the source files.
+For more information, use the following links:
+- [boot/bootutil](https://github.com/mcu-tools/mcuboot/tree/main/boot/bootutil) - The core of the bootloader itself.
+- [boot/boot\_serial](https://github.com/mcu-tools/mcuboot/tree/main/boot/boot_serial) - Support for serial upgrade within the bootloader itself.
+- [boot/zephyr](https://github.com/mcu-tools/mcuboot/tree/main/boot/zephyr) - Port of the bootloader to Zephyr.
+- [boot/mynewt](https://github.com/mcu-tools/mcuboot/tree/main/boot/mynewt) - Bootloader application for Apache Mynewt.
+- [boot/nuttx](https://github.com/mcu-tools/mcuboot/tree/main/boot/nuttx) - Bootloader application and port of MCUboot interfaces for Apache NuttX.
+- [boot/mbed](https://github.com/mcu-tools/mcuboot/tree/main/boot/mbed) - Port of the bootloader to Mbed OS.
+- [boot/espressif](https://github.com/mcu-tools/mcuboot/tree/main/boot/espressif) - Bootloader application and MCUboot port for Espressif SoCs.
+- [boot/cypress](https://github.com/mcu-tools/mcuboot/tree/main/boot/cypress) - Bootloader application and MCUboot port for Cypress/Infineon SoCs.
+- [imgtool](https://github.com/mcu-tools/mcuboot/tree/main/scripts/imgtool.py) - A tool to securely sign firmware images for booting by MCUboot.
+- [sim](https://github.com/mcu-tools/mcuboot/tree/main/sim) - A bootloader simulator for testing and regression.
+
+## Joining the project
+
+Developers are welcome!
+
+Use the following links to join or see more about the project:
+
+* [Our developer mailing list](https://groups.io/g/MCUBoot)
+* [Our Discord channel](https://discord.com/channels/1106321706588577904/1106322802308550716) <br />
+  Get [your invite](https://discord.com/invite/5PpXhvda5p)