Auto running code on reset

[aswinsreekumar]

Sir,
Currently, the program runs when the particular function is called in the terminal. Is there a method to run main() automatically when its reset each time ? (SDK programming)

Thank you

[KamilTomaszewski]

Hi @aswinsreekumar

It is described here: https://developer.sony.com/develop/spresense/docs/sdk_developer_guide_en.html#_board_initialization_process

1. Change the user entry point using CONFIG_USER_ENTRYPOINT configuration to your function.
2. Add to the beginning of your main function:

boardctl(BOARDIOC_INIT, 0);

If you want to use SD card then check out a similar post here: https://forum.developer.sony.com/topic/111/how-to-set-player_main-as-the-sdk-application-entry-point

Best Regards,
Kamil Tomaszewski

[aswinsreekumar]

@kamiltomaszewski Sir, how to implement step 1? Should I change CONFIG_USER_ENTRYPOINT="spresense_main" in sdk.config file of my project to CONFIG_USER_ENTRYPOINT="serial_on_off_main" ? (Given my application name is serial_on_off.c).

Also another small doubt, how to power the extension board externally ? Because I'm unable to get the internal wiring diagram of the extension board and is there a pin connected to the input of LDO inside ?

Thanking you.

[KamilTomaszewski]

Hi @aswinsreekumar

To reconfigure, go to the SDK configuration as shown here: https://developer.sony.com/develop/spresense/docs/sdk_set_up_ide_en.html#_sdk_configuration. Then search for CONFIG_USER_ENTRYPOINT and change to serial_on_off_main. Click Save to save.

You can find all diagrams here: https://developer.sony.com/develop/spresense/docs/hw_design_en.html

Additionally, if you are interested in power supply, please see this:
https://developer.sony.com/develop/spresense/docs/hw_docs_en.html#_regarding_power_supply_when_connecting_externally_connected_devices_to_the_spresense_board

I think that should answer your questions. If not, let me know.

Best Regards,
Kamil Tomaszewski

[aswinsreekumar]

@kamiltomaszewski Thank you sir. User entry point configuration was successful and I understood regarding the external powering up from the diagram.