pw_sys_io_zephyr

Stable

Overview

This sys I/O backend implements the pw_sys_io facade. It’s controlled by choice PIGWEED_SYS_IO_BACKEND (see How backend selection works for how these choices work) and defaults to “none”: the backend registers itself with SYS_INIT, so selecting it always links it in and initializes the console at boot.

• CONFIG_PIGWEED_SYS_IO=y – link Pigweed’s Zephyr backend. I/O operations are routed to Zephyr’s console. Additionally, it is possible to enable the USB subsystem by setting CONFIG_PIGWEED_SYS_IO_USB=y.

• CONFIG_PIGWEED_SYS_IO_NONE=y – don’t link a backend.

Select CONFIG_PIGWEED_SYS_IO=y if you use pw_sys_io, directly or through a module such as pw_hdlc; otherwise CMake fails the build naming the pw_sys_io facade.

The I/O backend initializes during Zephyr’s APPLICATION level and uses CONFIG_PIGWEED_SYS_IO_INIT_PRIORITY to set the priority level. This config value defaults to 1, but is configurable via Kconfig.