How to use the RISC-V and be able to turn it off and on

[Luis Leon]

Hi there. I am trying to use the RISC-V core with a custom code to take a picture. In a separate project it is working with MBOX and communicating the image pointer in memory to the app core. Now I need to start the board, disable the RISC-V core, wait for a command, in this case using a UART command from the app core, awake the RISC-V core, run the code that takes the pic and communicate the pointer to the app core and be turned off. I tried to locate an example but not able to find something workable yet. Can you guide me to some guide or example?

Thanks in advance.

Luis

[Vidar Berg]

Hello Luis,

Please have a look at the demo sample I created here: https://github.com/vidarbe/ncs_hello_world_with_flpr/tree/main and see if that is something you can work with. Initially I made it without any communication between the cores, but added the "ipc_test" branch today with help from Cursor and the IPC service sample here: https://github.com/nrfconnect/sdk-nrf/tree/main/samples/ipc/ipc_service 

Best regards,

Vidar