51 lines
1.5 KiB
Markdown
51 lines
1.5 KiB
Markdown
ELFloader and shell command 'exec' example for Sky platform
|
|
-----------------------------------------------------------
|
|
|
|
Compiles the Contiki hello-world application as a Contiki executable (.ce).
|
|
The Contiki executable is then uploaded to the Sky 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 sky-shell-exec.sky
|
|
make sky-shell-exec.sky CORE=sky-shell-exec.sky
|
|
make sky-shell-exec.upload CORE=sky-shell-exec.sky
|
|
|
|
2. Verify access to the shell and the filesystem:
|
|
|
|
> make login
|
|
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
|
|
[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
|
|
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.
|