osd-contiki/examples/mb851/shell-exec/README.md

ELFloader and shell command 'exec' example for MB851 (STM32W) platform
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Compiles the Contiki hello-world application as a Contiki executable (.ce).
The Contiki executable is then uploaded to the MB851 platform via serial, and
is stored in the filesystem.  Finally, the executable is loaded via the shell
command 'exec'.

NOTE:
You may have to reduce the ELF loader memory usage (/platform/sky/contiki-conf.h).
Since hello-world uses very little memory:
#define ELFLOADER_CONF_DATAMEMORY_SIZE 0x100
#define ELFLOADER_CONF_TEXTMEMORY_SIZE 0x100

1. Upload Sky shell with 'exec' command and symbols (requires several
   recompilations to generate correct symbols):

    make
    make CORE=shell-exec-test.mb851
    make shell-exec-test.flash CORE=shell-exec-test.mb851 PORT=AUTO

2. Verify access to the shell and the filesystem:

    > make login DEV=/dev/comX
    SHELL> echo hello shell
    SHELL> echo test | write mytest.txt
    SHELL> ls
    SHELL> read mytest.txt
    [CTRL-C] to exit the shell

3. Upload Contiki executable hello-world.ce:

    > make upload-executable DEV=/dev/comX
    [CTRL-C] to exit the shell when the entire file has been uploaded (after ~30 sec)

4. Verify that hello-world.ce exists in CFS:

    > make login DEV=/dev/comX
    SHELL> ls
    SHELL> read hello-world.ce | size

The last command output should equal the size of hello-world.ce in this
directory!

5. Load and start hello world:

    SHELL> exec hello-world.ce

The program should now start: the output 'Hello, World' appears.