Port of MicroPython to the mbed platform. See micropython-repl for an interactive program.

Dependents:   micropython-repl

This a port of MicroPython to the mbed Classic platform.

This provides an interpreter running on the board's USB serial connection.

Getting Started

Import the micropython-repl program into your IDE workspace on developer.mbed.org. Compile and download to your board. Connect to the USB serial port in your usual manner. You should get a startup message similar to the following:

  MicroPython v1.7-155-gdddcdd8 on 2016-04-23; K64F with ARM
  Type "help()" for more information.
  >>>

Then you can start using micropython. For example:

  >>> from mbed import DigitalOut
  >>> from pins import LED1
  >>> led = DigitalOut(LED1)
  >>> led.write(1)

Requirements

You need approximately 100K of flash memory, so this will be no good for boards with smaller amounts of storage.

Caveats

This can be considered an alpha release of the port; things may not work; APIs may change in later releases. It is NOT an official part part the micropython project, so if anything doesn't work, blame me. If it does work, most of the credit is due to micropython.

  • Only a few of the mbed classes are available in micropython so far, and not all methods of those that are.
  • Only a few boards have their full range of pin names available; for others, only a few standard ones (USBTX, USBRX, LED1) are implemented.
  • The garbage collector is not yet implemented. The interpreter will gradually consume memory and then fail.
  • Exceptions from the mbed classes are not yet handled.
  • Asynchronous processing (e.g. events on inputs) is not supported.

Credits

  • Damien P. George and other contributors who created micropython.
  • Colin Hogben, author of this port.

py/objmodule.c

Committer:
Colin Hogben
Date:
2016-04-16
Revision:
2:c89e95946844
Parent:
0:5868e8752d44

File content as of revision 2:c89e95946844:

/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * 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.
 */

#include <stdlib.h>
#include <assert.h>

#include "py/mpstate.h"
#include "py/nlr.h"
#include "py/objmodule.h"
#include "py/runtime.h"
#include "py/builtin.h"

STATIC void module_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
    (void)kind;
    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);

#if MICROPY_PY___FILE__
    // If we store __file__ to imported modules then try to lookup this
    // symbol to give more information about the module.
    mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___file__), MP_MAP_LOOKUP);
    if (elem != NULL) {
        mp_printf(print, "<module '%q' from '%s'>", self->name, mp_obj_str_get_str(elem->value));
        return;
    }
#endif

    mp_printf(print, "<module '%q'>", self->name);
}

STATIC void module_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
    if (dest[0] == MP_OBJ_NULL) {
        // load attribute
        mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
        if (elem != NULL) {
            dest[0] = elem->value;
        }
    } else {
        // delete/store attribute
        mp_obj_dict_t *dict = self->globals;
        if (dict->map.is_fixed) {
            #if MICROPY_CAN_OVERRIDE_BUILTINS
            if (dict == &mp_module_builtins_globals) {
                if (MP_STATE_VM(mp_module_builtins_override_dict) == NULL) {
                    MP_STATE_VM(mp_module_builtins_override_dict) = MP_OBJ_TO_PTR(mp_obj_new_dict(1));
                }
                dict = MP_STATE_VM(mp_module_builtins_override_dict);
            } else
            #endif
            {
                // can't delete or store to fixed map
                return;
            }
        }
        if (dest[1] == MP_OBJ_NULL) {
            // delete attribute
            mp_obj_dict_delete(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr));
        } else {
            // store attribute
            // TODO CPython allows STORE_ATTR to a module, but is this the correct implementation?
            mp_obj_dict_store(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr), dest[1]);
        }
        dest[0] = MP_OBJ_NULL; // indicate success
    }
}

const mp_obj_type_t mp_type_module = {
    { &mp_type_type },
    .name = MP_QSTR_module,
    .print = module_print,
    .attr = module_attr,
};

mp_obj_t mp_obj_new_module(qstr module_name) {
    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
    mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
    // We could error out if module already exists, but let C extensions
    // add new members to existing modules.
    if (el->value != MP_OBJ_NULL) {
        return el->value;
    }

    // create new module object
    mp_obj_module_t *o = m_new_obj(mp_obj_module_t);
    o->base.type = &mp_type_module;
    o->name = module_name;
    o->globals = MP_OBJ_TO_PTR(mp_obj_new_dict(MICROPY_MODULE_DICT_SIZE));

    // store __name__ entry in the module
    mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(module_name));

    // store the new module into the slot in the global dict holding all modules
    el->value = MP_OBJ_FROM_PTR(o);

    // return the new module
    return MP_OBJ_FROM_PTR(o);
}

mp_obj_dict_t *mp_obj_module_get_globals(mp_obj_t self_in) {
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_module));
    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
    return self->globals;
}

/******************************************************************************/
// Global module table and related functions

STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
    { MP_ROM_QSTR(MP_QSTR___main__), MP_ROM_PTR(&mp_module___main__) },
    { MP_ROM_QSTR(MP_QSTR_builtins), MP_ROM_PTR(&mp_module_builtins) },
    { MP_ROM_QSTR(MP_QSTR_micropython), MP_ROM_PTR(&mp_module_micropython) },

#if MICROPY_PY_ARRAY
    { MP_ROM_QSTR(MP_QSTR_array), MP_ROM_PTR(&mp_module_array) },
#endif
#if MICROPY_PY_IO
    { MP_ROM_QSTR(MP_QSTR__io), MP_ROM_PTR(&mp_module_io) },
#endif
#if MICROPY_PY_COLLECTIONS
    { MP_ROM_QSTR(MP_QSTR__collections), MP_ROM_PTR(&mp_module_collections) },
#endif
#if MICROPY_PY_STRUCT
    { MP_ROM_QSTR(MP_QSTR_ustruct), MP_ROM_PTR(&mp_module_ustruct) },
#endif

#if MICROPY_PY_BUILTINS_FLOAT
#if MICROPY_PY_MATH
    { MP_ROM_QSTR(MP_QSTR_math), MP_ROM_PTR(&mp_module_math) },
#endif
#if MICROPY_PY_BUILTINS_COMPLEX && MICROPY_PY_CMATH
    { MP_ROM_QSTR(MP_QSTR_cmath), MP_ROM_PTR(&mp_module_cmath) },
#endif
#endif
#if MICROPY_PY_SYS
    { MP_ROM_QSTR(MP_QSTR_sys), MP_ROM_PTR(&mp_module_sys) },
#endif
#if MICROPY_PY_GC && MICROPY_ENABLE_GC
    { MP_ROM_QSTR(MP_QSTR_gc), MP_ROM_PTR(&mp_module_gc) },
#endif

    // extmod modules

#if MICROPY_PY_UCTYPES
    { MP_ROM_QSTR(MP_QSTR_uctypes), MP_ROM_PTR(&mp_module_uctypes) },
#endif
#if MICROPY_PY_UZLIB
    { MP_ROM_QSTR(MP_QSTR_uzlib), MP_ROM_PTR(&mp_module_uzlib) },
#endif
#if MICROPY_PY_UJSON
    { MP_ROM_QSTR(MP_QSTR_ujson), MP_ROM_PTR(&mp_module_ujson) },
#endif
#if MICROPY_PY_URE
    { MP_ROM_QSTR(MP_QSTR_ure), MP_ROM_PTR(&mp_module_ure) },
#endif
#if MICROPY_PY_UHEAPQ
    { MP_ROM_QSTR(MP_QSTR_uheapq), MP_ROM_PTR(&mp_module_uheapq) },
#endif
#if MICROPY_PY_UHASHLIB
    { MP_ROM_QSTR(MP_QSTR_uhashlib), MP_ROM_PTR(&mp_module_uhashlib) },
#endif
#if MICROPY_PY_UBINASCII
    { MP_ROM_QSTR(MP_QSTR_ubinascii), MP_ROM_PTR(&mp_module_ubinascii) },
#endif
#if MICROPY_PY_URANDOM
    { MP_ROM_QSTR(MP_QSTR_urandom), MP_ROM_PTR(&mp_module_urandom) },
#endif
#if MICROPY_PY_USSL
    { MP_ROM_QSTR(MP_QSTR_ussl), MP_ROM_PTR(&mp_module_ussl) },
#endif
#if MICROPY_PY_LWIP
    { MP_ROM_QSTR(MP_QSTR_lwip), MP_ROM_PTR(&mp_module_lwip) },
#endif
#if MICROPY_PY_WEBSOCKET
    { MP_ROM_QSTR(MP_QSTR_websocket), MP_ROM_PTR(&mp_module_websocket) },
#endif
#if MICROPY_PY_FRAMEBUF
    { MP_ROM_QSTR(MP_QSTR_framebuf), MP_ROM_PTR(&mp_module_framebuf) },
#endif

    // extra builtin modules as defined by a port
    MICROPY_PORT_BUILTIN_MODULES
};

STATIC MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table);

void mp_module_init(void) {
    mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
}

void mp_module_deinit(void) {
    //mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map));
}

// returns MP_OBJ_NULL if not found
mp_obj_t mp_module_get(qstr module_name) {
    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
    // lookup module
    mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);

    if (el == NULL) {
        // module not found, look for builtin module names
        el = mp_map_lookup((mp_map_t*)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
        if (el == NULL) {
            return MP_OBJ_NULL;
        }

        if (MICROPY_MODULE_BUILTIN_INIT) {
            // look for __init__ and call it if it exists
            mp_obj_t dest[2];
            mp_load_method_maybe(el->value, MP_QSTR___init__, dest);
            if (dest[0] != MP_OBJ_NULL) {
                mp_call_method_n_kw(0, 0, dest);
                // register module so __init__ is not called again
                mp_module_register(module_name, el->value);
            }
        }
    }

    // module found, return it
    return el->value;
}

void mp_module_register(qstr qst, mp_obj_t module) {
    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
    mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
}