OpenAMP using resource table
Overview
This application demonstrates how to use OpenAMP with Zephyr based on a resource table. It is designed to respond to the:
This sample implementation is compatible with platforms that embed a Linux kernel OS on the main processor and a Zephyr application on the co-processor.
Building the application
Zephyr
# From the root of the zephyr repository
west build -b None samples/subsys/ipc/openamp_rsc_table
west build -t test
Running the client sample
Linux setup
Enable SAMPLE_RPMSG_CLIENT configuration to build the rpmsg_client_sample.ko module.
Zephyr setup
Open a serial terminal (minicom, putty, etc.) and connect to the board using default serial port settings.
Linux console
Open a Linux shell (minicom, ssh, etc.) and insert the rpmsg_client_sample module into the Linux Kernel.
Right after, logs should be displayed to notify channel creation/destruction and incoming message.
root@linuxshell: insmod rpmsg_client_sample.ko
[ 44.625407] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: new channel: 0x401 -> 0x400!
[ 44.631401] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: incoming msg 1 (src: 0x400)
[ 44.640614] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: incoming msg 2 (src: 0x400)
...
[ 45.152269] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: incoming msg 99 (src: 0x400)
[ 45.157678] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: incoming msg 100 (src: 0x400)
[ 45.158822] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: goodbye!
[ 45.159741] virtio_rpmsg_bus virtio0: destroying channel rpmsg-client-sample addr 0x400
[ 45.160856] rpmsg_client_sample virtio0.rpmsg-client-sample.-1.1024: rpmsg sample client driver is removed
Zephyr console
For each message received, its content is displayed as shown down below then sent back to Linux.
*** Booting Zephyr OS build zephyr-v#.#.#-####-g########## ***
Starting application threads!
OpenAMP[remote] Linux responder demo started
OpenAMP[remote] Linux sample client responder started
OpenAMP[remote] Linux TTY responder started
[Linux sample client] incoming msg 1: hello world!
[Linux sample client] incoming msg 2: hello world!
...
[Linux sample client] incoming msg 99: hello world!
[Linux sample client] incoming msg 100: hello world!
OpenAMP Linux sample client responder ended
Running the rpmsg TTY demo
Linux setup
Enable RPMSG_TTY in the kernel configuration.
Zephyr setup
Open a serial terminal (minicom, putty, etc.) and connect to the board using default serial port settings.
Linux console
Open a Linux shell (minicom, ssh, etc.) and print the messages coming through the rpmsg-tty endpoint created during the sample initialization.
On the Linux console, send a message to Zephyr which answers with the TTY <addr>: prefix.
<addr> corresponds to the Zephyr rpmsg-tty endpoint address:
$> cat /dev/ttyRPMSG0 &
$> echo "Hello Zephyr" >/dev/ttyRPMSG0
TTY 0x0401: Hello Zephyr
Zephyr console
On the Zephyr console, the received message is displayed as shown below, then sent back to Linux.
*** Booting Zephyr OS build zephyr-v#.#.#-####-g########## ***
Starting application threads!
OpenAMP[remote] Linux responder demo started
OpenAMP[remote] Linux sample client responder started
OpenAMP[remote] Linux TTY responder started
[Linux TTY] incoming msg: Hello Zephyr