Async UART and shell module in Zephyr on nRF52480

[AndyM]

I have shell working with the following configuration

CONFIG_SHELL=y

CONFIG_SHELL_BACKENDS=y

CONFIG_SHELL_BACKEND_SERIAL=y #also selects serial

CONFIG_SHELL_CMDS=y

CONFIG_SHELL_ECHO_STATUS=y

Now I need to add async UART to send some data outside the shell

I added 

CONFIG_UART_ASYNC_API=y

but the call  uart_callback_set() fails with ENOSYS ( async not supported in the device )

If I explicitly set 

CONFIG_UART_0_INTERRUPT_DRIVEN=n uart_callback_setI() succeeds but I cannot type in the shell window

Is there a way to use UART async API with the shell?

Thanks

[Susheel Nuguru]

It might be possible but you need to have some inter-thread communication implemented between the shell module and your thread to synchronize the access to uart in your application. There is no config to temporarily disable shell to give other threads access to uart.

[AndyM]

Found the solution

shell_print(shell_backend_uart_get_ptr(),"%s",data);