How to Run and Add a HelloWorld Application#

This document is divided into two parts:

First, run the HelloWorld already provided by the SDK (fastest way to verify the environment)
Then add/modify your own HelloWorld application

Run the Built-in HelloWorld (Recommended First)#

The SDK already provides the example directory: src/applications/helloworld

cd <sdk_root>
ls src/applications/helloworld

If the directory contains Kconfig, Makefile, and main.c, the example is ready.

Enable the HelloWorld Build Switch#

make menuconfig

Enable in the menu:

Application Configuration > Enable Application HelloWorld

Compile and Flash#

make

After flashing is complete, the application will be packaged into the /sdcard/app/ directory on the board.

Run on the Board#

/sdcard/app/helloworld

Add/Modify HelloWorld#

You can modify directly based on the existing src/applications/helloworld, or copy it as a new application directory.

Compile#

Compile Individually#

cd <sdk_root>/src/applications/helloworld
make
ls

An executable file helloworld is generated, which can be manually copied to the board for execution.

Compile the Entire img#

Modify src/applications/apps.mk and add the corresponding directory to the build system.

cat src/applications/apps.mk
-include $(SDK_SRC_ROOT_DIR)/.config

subdirs-$(CONFIG_APP_ENABLE_HELLOWORLD) += helloworld

Enable the APP compilation feature in menuconfig

make menuconfig

Application Configuration > Enable Application HelloWorld

Then execute make or make app to compile the applications under the src/applications directory.

make

Flash the compiled IMG to the development board. The application will be packaged into the /sdcard/app/ directory of the image, and users can set it to start automatically on boot or run it manually for testing.