# PX4-Bootloader

**Repository Path**: bear2529/PX4-Bootloader

## Basic Information

- **Project Name**: PX4-Bootloader
- **Description**: PX4 Bootloader for PX4FMU, PX4IO and PX4FLOW
- **Primary Language**: Unknown
- **License**: BSD-3-Clause-Clear
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2020-11-18
- **Last Updated**: 2024-10-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Bootloaders for the Pixhawk board family

[![Build Status](https://travis-ci.org/PX4/Bootloader.svg?branch=master)](https://travis-ci.org/PX4/Bootloader)

## Build instructions

Use ONLY `arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2017-q4-major) 7.2.1 20170904 (release) [ARM/embedded-7-branch revision 255204]`

**Version 9.3 will cause issues with flash programing and not work at this time!**

Build all targets:

```
git submodule sync --recursive
git submodule update --init --recursive
make
```

The binaries will be in `build/BOARDNAME/BOARDNAME.elf`. Two files are built: ELF files for use with JTAG adapters and BIN files for direct onboard upgrading.

Build a specific board: Please check the `Makefile` for specific build targets.

## License

License: LGPL for libopencm3, BSD for core bootloader (see LICENSE.md)

## Contact

  * Chat: [Dronecode Slack](http://slack.px4.io)
  * Forum: [Dronecode Discuss](http://discuss.px4.io)

## Bootloader Usage

Typical use case. The PX4 IO. [px4pipbl.pdf](https://github.com/PX4/Bootloader/files/3955700/px4pipbl.pdf)

To avoid accidental erasure or bad image loading:

The booaloder need to receive `PROTO_GET_SYNC` and `PROTO_GET_DEVICE` Prior to receiving `PROTO_CHIP_ERASE`    
The booaloder need to receive `PROTO_GET_SYNC` and `PROTO_GET_DEVICE` and `PROTO_PROG_MULTI` and `PROTO_GET_CRC` Prior to receiving `PROTO_BOOT`