Colin Hogben / micropython

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/frozenmod.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) 2015 Paul Sokolovsky
 * Copyright (c) 2016 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 <string.h>
#include <stdint.h>

#include "py/lexer.h"
#include "py/frozenmod.h"

#if MICROPY_MODULE_FROZEN_STR

#ifndef MICROPY_MODULE_FROZEN_LEXER
#define MICROPY_MODULE_FROZEN_LEXER mp_lexer_new_from_str_len
#else
mp_lexer_t *MICROPY_MODULE_FROZEN_LEXER(qstr src_name, const char *str, mp_uint_t len, mp_uint_t free_len);
#endif

extern const char mp_frozen_str_names[];
extern const uint32_t mp_frozen_str_sizes[];
extern const char mp_frozen_str_content[];

STATIC mp_lexer_t *mp_find_frozen_str(const char *str, size_t len) {
    const char *name = mp_frozen_str_names;

    size_t offset = 0;
    for (int i = 0; *name != 0; i++) {
        size_t l = strlen(name);
        if (l == len && !memcmp(str, name, l)) {
            mp_lexer_t *lex = MICROPY_MODULE_FROZEN_LEXER(MP_QSTR_, mp_frozen_str_content + offset, mp_frozen_str_sizes[i], 0);
            return lex;
        }
        name += l + 1;
        offset += mp_frozen_str_sizes[i] + 1;
    }
    return NULL;
}

#endif

#if MICROPY_MODULE_FROZEN_MPY

#include "py/emitglue.h"

extern const char mp_frozen_mpy_names[];
extern const mp_raw_code_t *const mp_frozen_mpy_content[];

STATIC const mp_raw_code_t *mp_find_frozen_mpy(const char *str, size_t len) {
    const char *name = mp_frozen_mpy_names;
    for (size_t i = 0; *name != 0; i++) {
        size_t l = strlen(name);
        if (l == len && !memcmp(str, name, l)) {
            return mp_frozen_mpy_content[i];
        }
        name += l + 1;
    }
    return NULL;
}

#endif

#if MICROPY_MODULE_FROZEN

int mp_find_frozen_module(const char *str, size_t len, void **data) {
    #if MICROPY_MODULE_FROZEN_STR
    mp_lexer_t *lex = mp_find_frozen_str(str, len);
    if (lex != NULL) {
        *data = lex;
        return MP_FROZEN_STR;
    }
    #endif
    #if MICROPY_MODULE_FROZEN_MPY
    const mp_raw_code_t *rc = mp_find_frozen_mpy(str, len);
    if (rc != NULL) {
        *data = (void*)rc;
        return MP_FROZEN_MPY;
    }
    #endif
    return MP_FROZEN_NONE;
}

#endif