Customizing NSH Initialization

Ways to Customize NSH Initialization. There are three ways to customize the NSH start-up behavior. Here they are presented in order of increasing difficulty:

1. You can extend the initialization logic in boards/arm/stm32/stm3240g-eval/src/stm32_appinit.c. The logic there is called each time that NSH is started and is good place in particular for any device-related initialization.

2. You replace the sample code at apps/examples/nsh/nsh_main.c with whatever start-up logic that you want. NSH is a library at apps/nshlib. apps.examples/nsh is just a tiny, example start-up function (CONFIG_INIT_ENTRYPOINT()) that runs immediately and illustrates how to start NSH If you want something else to run immediately then you can write your write your own custom CONFIG_INIT_ENTRYPOINT() function and then start other tasks from your custom CONFIG_INIT_ENTRYPOINT().

3. NSH also supports a start-up script that executed when NSH first runs. This mechanism has the advantage that the start-up script can contain any NSH commands and so can do a lot of work with very little coding. The disadvantage is that is is considerably more complex to create the start-up script. It is sufficiently complex that is deserves its own paragraph