92 lines
3.5 KiB
Markdown
92 lines
3.5 KiB
Markdown
# Building in Ubuntu
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Building for Ubuntu platform is remarkably easy. The only trick to understand is that the Ubuntu toolchain,
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which they are downstreaming from Debian, is not compatible with Betaflight. We suggest that you take an
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alternative PPA from Terry Guo, found here:
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https://launchpad.net/~terry.guo/+archive/ubuntu/gcc-arm-embedded
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This PPA has several compiler versions and platforms available. For many hardware platforms (notably Naze)
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the 4.9.3 compiler will work fine. For some, older compiler 4.8 (notably Sparky) is more appropriate. We
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suggest you build with 4.9.3 first, and try to see if you can connect to the CLI or run the Configurator.
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If you cannot, please see the section below for further hints on what you might do.
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Adjust the ARM_SDK_DIR variable in make/tools.mk file with the correct "gcc-arm-none-eabi-xxx" version.
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## Setup GNU ARM Toolchain
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Note specifically the last paragraph of Terry's PPA documentation -- Ubuntu carries its own package for
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`gcc-arm-none-eabi`, so you'll have to remove it, and then pin the one from the PPA.
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For your release, you should first remove any older pacakges (from Debian or Ubuntu directly), introduce
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Terry's PPA, and update:
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```bash
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sudo apt-get remove binutils-arm-none-eabi gcc-arm-none-eabi
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sudo add-apt-repository ppa:team-gcc-arm-embedded/ppa
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sudo apt-get update
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```
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For Ubuntu 14.10 (current release, called Utopic Unicorn), you should pin:
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```bash
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sudo apt-get install gcc-arm-none-eabi=4.9.3.2014q4-0utopic12
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```
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For Ubuntu 14.04 (an LTS as of Q1'2015, called Trusty Tahr), you should pin:
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```bash
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sudo apt-get install gcc-arm-none-eabi=4.9.3.2014q4-0trusty12
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```
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For Ubuntu 12.04 (previous LTS, called Precise Penguin), you should pin:
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```bash
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sudo apt-get install gcc-arm-none-eabi=4.9.3.2014q4-0precise12
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```
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## Building on Ubuntu
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After the ARM toolchain from Terry is installed, you should be able to build from source.
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```bash
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cd src
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git clone git@github.com:betaflight/betaflight.git
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cd betaflight
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make TARGET=NAZE
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```
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You'll see a set of files being compiled, and finally linked, yielding both an ELF and then a HEX:
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```
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...
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arm-none-eabi-size ./obj/main/betaflight_NAZE.elf
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text data bss dec hex filename
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97164 320 11080 108564 1a814 ./obj/main/betaflight_NAZE.elf
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arm-none-eabi-objcopy -O ihex --set-start 0x8000000 obj/main/betaflight_NAZE.elf obj/betaflight_NAZE.hex
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$ ls -la obj/betaflight_NAZE.hex
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-rw-rw-r-- 1 pim pim 274258 Jan 12 21:45 obj/betaflight_NAZE.hex
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```
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You can use the Betaflight-Configurator to flash the `obj/betaflight_NAZE.hex` file.
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## Bricked/Bad build?
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Users have reported that the 4.9.3 compiler for ARM produces bad builds, for example on the Sparky hardware platform.
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It is very likely that using an older compiler would be fine -- Terry happens to have also a 4.8 2014q2 build in his
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PPA - to install this, you can fetch the `.deb` directly:
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http://ppa.launchpad.net/terry.guo/gcc-arm-embedded/ubuntu/pool/main/g/gcc-arm-none-eabi/
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and use `dpkg` to install:
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```bash
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sudo dpkg -i gcc-arm-none-eabi_4-8-2014q2-0saucy9_amd64.deb
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```
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Make sure to remove `obj/` and `make clean`, before building again.
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## Updating and rebuilding
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Navigate to the local betaflight repository and use the following steps to pull the latest changes and rebuild your version of betaflight:
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```bash
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cd src/betaflight
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git reset --hard
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git pull
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make clean TARGET=NAZE
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make
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```
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Credit goes to K.C. Budd, AKfreak for testing, and pulsar for doing the long legwork that yielded this very short document.
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