apps/interpreters README file
=============================
This apps/ directory is set aside to hold interpreters that may be
incorporated into NuttX.
ficl
----
This is DIY port of Ficl (the "Forth Inspired Command Language"). See
http://ficl.sourceforge.net/. It is a "DIY" port because the Ficl source
is not in that directory, only an environment and instructions that will
let you build Ficl under NuttX. The rest is up to you.
micropython
-----------
This is a port of a build environment for Micro Python:
https://micropython.org/
Configuration Options:
CONFIG_INTERPRETERS_MICROPYTHON - Enables support for the Micro Python
interpreter
CONFIG_INTERPRETERS_MICROPYTHON_URL - URL where Micro Python can be
downloaded. default "https://github.com/micropython/micropython/archive".
There are more recent snapshots at https://micropython.org/download/
CONFIG_INTERPRETERS_MICROPYTHON_VERSION - Version number. Default "1.3.8"
CONFIG_INTERPRETERS_MICROPYTHON_APPNAME - Executable name. Only needed
if CONFIG_NSH_BUILTIN_APPS=y. Default: "micropython"
CONFIG_INTERPRETERS_MICROPYTHON_STACKSIZE - Interpreter stack size. Only
needed if CONFIG_NSH_BUILTIN_APPS=y. Default: 2048
CONFIG_INTERPRETERS_MICROPYTHON_PRIORITY - Interpreter priority. Only
needed if CONFIG_NSH_BUILTIN_APPS=y. Default: 100
CONFIG_INTERPRETERS_MICROPYTHON_PROGNAME - Program name. Only needed
if CONFIG_BUILD_KERNEL=y. Default: "micropython"
NOTE that Micro Python is not included in this directory. Be default,
it will be downloaded at build time from the github . You can avoid
this download by pre-installing Micro Python. Before building, just
download Micro Python from:
https://micropython.org/download/
https://github.com/micropython/micropython/releases
Or clone from the GIT repository at:
https://github.com/micropython/
https://github.com/micropython/micropython
The Micro Python should be provided as a tarbll name:
apps/interpreters/micropython/v$(CONFIG_INTERPRETERS_MICROPYTHON_VERSION).tar.gz
and the unpacked code should reside in directory at:
apps/interpreters/micropython/micropython-$(CONFIG_INTERPRETERS_MICROPYTHON_VERSION)
This port was contributed by Dave Marples using Micro Python circa
1.3.8. It may not be compatible with other versions.
NOTES:
1. Micro Python will not build on Windows with a Windows native toolchain
due to use of POSIX paths in the Micro Python build system. It should build
correctly on Linux or under Cygwin with the NuttX buildroot tools.
2. Micro Python will not run correctly on a 64-bit target (such as the NuttX
simulation on a 64-bit platfform). In that case it generates assertions
like:
OverflowError: long int not supported in this build
This change to mpconfigport.h is a partial work-around but does not solve
all issues:
-#define MICROPY_LONGINT_IMPL (MICROPY_LONGINT_IMPL_MPZ)
+#define MICROPY_LONGINT_IMPL (MICROPY_LONGINT_IMPL_LONGLONG)
Someday it will probably be necessary to autogenerate the mpconfigport.h
header file with the correct properties for the target system.\
3. Can't fine alloca.h? With GCC compilers you may be able replace the
inclusion of alloca.h in mkconfigport.h with:
#define alloca(a) __builtin_alloca(a)
4. Micro Python needs the math library libm.a. The math library built into
NuttX is sufficient and that can be included with CONFIG_LIBM=y. If you
prefer a more highly tuned math library then refer to the discussion of
math.h in the the top-level nuttx/README.txt file. Also refer to the
discussions in the NuttX Yahoo! forum; people have found many creative
way to link with the newlib math library, for example.
5. See errors like this?
error: unknown type name 'wint_t'
You can't include the NuttX wchar.h header file where this is defined, but
you can add this to the mpconfigport.h header file (if it is not already
there):
typedef int wint_t;
Is the missing wint_t definition coming from alloca.h? You can either
(1) replace alloc(a) with the #define described above, or (2) move the
typedef of wint_t to before the inclusion of alloca.h.
6. Micro Python is released under the MIT license which is license-compatible
with the NuttX 3-clause BSD license. Here is the full text of the Micro
Python LICENSE file as of 2015-01-14:
The MIT License (MIT)
Copyright (c) 2013, 2014 Damien P. George
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
pcode
-----
At present, only the NuttX Pascal add-on is supported. This NuttX add-on
must be downloaded separately (or is available from the Nuttx Pascal GIT
repository).
This Pascal add-on must be installed into the NuttX apps/ directory. After
unpacking the Pascal add-on package, an installation script and README.txt
instructions can be found at pascal/nuttx.
INSTALL.sh -- The script that performs the operation. Usage:
./INSTALL.sh [-16|-32] <install-dir>
If you are using this standard NuttX apps/ package, the correct
location for the <install-dir> is apps/interpreters. That is
where the examples and build logic will expect to find the pcode
sub-directory.
Example:
./INSTALL.sh -16 $PWD/../../../apps/interpreters
After installation, the NuttX apps/interpresters directory will contain
the following files
pcode
|-- Makefile
|-- include
| `-- Common header files
|-- libboff
| `-- Pascal object format (POFF) library
`--insn
|-- include
| `-- model-specific header files
`-- prun
`-- model-specific source files
pashello
There is a simple Pascal example at apps/examples/pashello. This is the
standard "Hello, World!" example written in Pascal and interpreted from
Pascal P-Code at runtime. To use this example, place the following in
your defonfig file:
CONFIG_EXAMPLES_PASHELLO=y
CONFIG_INTERPRETERS_PCODE=y
prun
This directory holds some simple, convenience functions to simplify and
standardize the interaction with the P-Code library.
