IMHO this is too dependent on customer environment and preferences.
But it would be nice to be an official out-of-tree board skeleton to
show people how to organize it. libopencm3 has a demo project that is
very helpful.
Because it's always the first step when you use nuttx on real hardware
that is not an unmodified commercial devboard.
Sebastien
Le 02/02/2023 à 15:35, Alan C. Assis a écrit :
It should be nice to have a simple logic to let users to use ROMFS.
Currently everyone needs to duplicate it in their own code/application.
I'm thinking something like apps/romfiles/ where people just put the
files that they want to be in the ROM and it will be included
automatically, instead reinventing the wheel.
BR,
Alan
On 2/2/23, Sebastien Lorquet <sebast...@lorquet.fr> wrote:
Hi,
Dont use boardctl for the romfs, this is too intertwined in the
mechanism used to initialize nsh, which is not suitable for customization.
This need to be decoupled, I've done this in my own apps. I'll send it
later, maybe.
Here is the proper way to mount a romfs from your board bringup() routines:
I am using stm32 as example, the ROM fs directory holding the file is a
brother to board/
boarddir:
+-- romfs
+-- your files...
+-- board
+-- include
+-- src
You can do something else if you change the makefile below
First change your board/src makefile to add a dependency so that
stm32_bringup.c depends on romfs.h
.PHONY: myromfs.h #might not be required
stm32_bringup.c: myromfs.h
myromfs.h:
@echo "ROMFS"
@genromfs -v -f my.romfs -d $(BOARD_DIR)/../romfs
@xxd -i my.romfs > myromfs.h
Then do this in stm32_bringup.c:
#include "myromfs.h"
#define SECTORSIZE 64
#define NSECTORS(b) (((b)+SECTORSIZE-1)/SECTORSIZE)
#include <nuttx/fs/fs.h>
#include <nuttx/drivers/ramdisk.h>
#include <sys/mount.h>
and then in stm32_bringup(void):
ret = romdisk_register(0, // /dev/ram0
myromfs, //var in the xxd header
NSECTORS(myromfs_len),
SECTORSIZE);
ret = nx_mount("/dev/ram0", "/romfs", "romfs", MS_RDONLY, NULL);
Then you will have your files mounted in /romfs at boot.
You can do symlinks:
ret = symlink("/romfs/etc" , "/etc");
_info("Linking /etc: %d\n", ret);
Sebastien
Le 02/02/2023 à 05:59, Russell Haley a écrit :
I am mistaken. I understood that the rom image was part of the
application
on flash, but had mis-read the documentation of
boardctl(BOARDIOC_ROMDISK,
(uintptr_t)&desc); and thought that the command loaded the image into
*RAM*
(the BOARDIOC_MKRD command makes the RAM disk. oops!).
Incidentally, neither the romfs example nor my attempt to re-create it
works in my sim:
osboxes@osboxes ~/n/nuttx (master)> ./nuttx
NuttShell (NSH) NuttX-12.0.0
nsh> romfs
ERROR: Failed to create RAM disk: Unknown error
nsh> rapp
Starting Russells App 1...
ERROR: Failed to create RAM disk: Unknown error
nsh>
I don't know how to debug this "unknown error". I guess I will try to
find
where that error message comes from and hook in GDB? I'm terrible at this
stuff, someone needs to revoke my compiler license (tee hee).
Cheers,
Russ
On Wed, Feb 1, 2023 at 7:29 PM Xiang Xiao <xiaoxiang781...@gmail.com>
wrote:
romfs is part of your image as the const string. There is no difference
from the below manual step.
On Thu, Feb 2, 2023 at 10:00 AM Russell Haley <russ.ha...@gmail.com>
wrote:
On Tue, Jan 31, 2023 at 6:16 AM Fotis Panagiotopoulos <
f.j.pa...@gmail.com
wrote:
Hello,
Indeed the "proper" way of including a script would be to store it in
a
file system.
However, when I needed to include a single and small script and I
didn't
want to introduce a complete FS just for this, I used xxd.
xxd can convert any file to a C header file.
You can then include the header, and access the whole file as a
variable.
Here is an example:
I added this in my app Makefile:
# Setup any special pre-build context
context: header
$(Q) cd path/to/libs/json.lua/ && xxd -i json.lua >
json_lua.h
&&
echo -n "const " | cat - json_lua.h > temp && mv temp json_lua.h
And then I used the file like this:
#include "lua.h"#include "lauxlib.h"#include <string.h>
#include "json_lua.h"
static int luaopen_json(lua_State * L);
void ExtLibs_load(lua_State * L){
// json.lua#ifdef CONFIG_EXT_LIB_JSON_LUA
luaL_requiref(L, "json", luaopen_json, 1);
lua_pop(L, 1);#endif}
int luaopen_json(lua_State * L){
const char * modname = lua_tostring(L, 1);
if (strcmp(modname, "json") != 0)
return luaL_error(L, "cannot load json module");
if (luaL_loadbufferx(L, (char*)json_lua, json_lua_len,
"json",
"t") != LUA_OK)
return lua_error(L);
lua_call(L, 0, 1);
return 1;}
I hope this helps...
That is very helpful, and not just for nuttx development! Thanks for
the
tip.
The romfs example actually uses xxd as well to convert the filesystem
into
hex code that is also stored in a header file. If I am reading the code
correctly, the example app loads the entire filesystem into memory,
which
isn't very efficient and not at all what I wanted. Can someone tell me
if
that's true?
Thanks,
Russ
On Sun, Jan 29, 2023 at 7:34 AM Xiang Xiao <xiaoxiang781...@gmail.com>
wrote:
You can use the real file system on the device, there are many
choices:
romfs, littlefs, fatfs, starmtfs and spiffs.
On Sun, Jan 29, 2023 at 12:59 PM Russell Haley <russ.ha...@gmail.com
wrote:
On Sat, Jan 28, 2023 at 7:35 PM Xiang Xiao <
xiaoxiang781...@gmail.com>
wrote:
You can enable CONFIG_FS_HOSTFS/CONFIG_SIM_HOSTFS, put your
scripts
into
some PC folder and run mount this folder from nsh:
mount -t hostfs -o fs=/path/to/your/pc/folder. /data
While I appreciate the answer, I am using the sim as a testing
platform
and hoping to move to either an STM32F4/7 or a Sony Spresense. I am
hoping
for a solution that is applicable to an embedded project. If I
can't
just
add files to the initial image then I will look at the romfs
example
and
maybe the next best thing?
On Sun, Jan 29, 2023 at 2:24 AM Russell Haley <
russ.ha...@gmail.com>
wrote:
Hi,
Big thanks to Xiang Xiao for pointing me to the sim:lua
configuration.
I
was unable to simply include the defconfig file that you linked
to,
but I
was able to reconfigure for the sim:lua configuration. I've
now
got
an
app
in the examples folder that includes the Lua interpreter. Is
there
a
tutorial on how to include folders and lua scripts or extra
files
in
the
initial file system?
Much appreciated,
Russ
