Javier-varez / AppTemplate

Template for C++ embedded SW applications.

App Template

This project is a C++ application template for small embedded ARM Cortex-M MCUs.

After cloning make sure to update the following fields:

• Update the APPLICATION_NAME variable in CMakeLists.txt with the name of your application.
• Update the CHIP_NAME variable in CMakeLists.txt with the target chip. You can see available targets with postform_rtt --list-chips.
• Update the memory.ld linker script to point to your RAM and FLASH memories.
• Update the systick frequency in systick_config.h.
• Write your own code and have tons of fun!

This template should work out of the box on a nRF52840 MCU.

To build you will need:

• An up to date clang compiler (version >= 11).
• A cross GCC ARM compiler (>= gcc-arm-none-eabi-10-2020-q4-major).
• CMake >= 3.16
• Optional: Ninja. It significantly speeds up the compilation process.
• Git: used by Postform to detect the FW version being used and embed it into the ELF debug sections.

Build instructions

Run the following commands in a terminal:

mkdir build
cd build

# Select the appropriate toolchain file for your MCU Architecture
cmake -G Ninja -D CMAKE_TOOLCHAIN_FILE=cmake/toolchains/armv7e-m.cmake -DCMAKE_SYSTEM_NAME=Generic ..
cmake --build .

# The output file will have the name given by the ${APPLICATION_NAME} variable in CMakeFiles.txt.
# By default this will be nrf52_app

In order to run the binary with Postform install postform_rtt with:

# Installs the latest version of Postform. It must match the firmware version used, which also
# tracks the main branch
cargo install postform_rtt --git https://github.com/Javier-varez/postform --branch main postform_rtt

Then run the program in the target, connect it to the computer using a JTAG/SWD interface and run:

cd build
ninja run

You should see some logs being printed in your terminal now!