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install_build.md

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Setup

Local Build

  • LPC1114FBD48/302
  • GCC cross compiler

Get compiler

sudo apt-get install gcc-arm-none-eabi

Note: Ubuntu's default arm-none-eabi-gcc (Version 12.2) fails to build a correct binary.

Get cmake

sudo apt-get install cmake

Get project

git clone git@github.com:SvenHaedrich/dali_usb_lpc1114.git
cd dali_usb_lpc1114
git submodule update --init --recursive

Debug build

Assuming that arm-none-eabi-gcc was installed to /usr/bin

cmake -B build -S . -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=/usr/bin/arm-none-eabi-gcc
cmake --build build --clean-first

Release build

cmake -B build -S . -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/bin/arm-none-eabi-gcc
cmake --build build --clean-first

Gihub Action Build

The binary is built by a github action for every push and pull request.

Flashing the Program

You can flash the local build using

./flash.sh

Or, any other tooling. Anyhow, notice that the LPC1114 checks for a valid user code. The criterion for valid user code (see 26.3.3 of UM10389 LPC111x User manual) is that the reserved Cortex-M0 exception vector location #7 (offset 0x0000 001C in the vector table) contains the 2's complement of the check-sum of table entries 0 through 6. The on-chip bootloader checks for this and starts the UART ISP command if the test fails. JLinkExe automatically validates the user code, so an immedaite readback of the flash content will always differ from the binary file.