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.

mphalport.c

Committer:
Colin Hogben
Date:
2016-04-27
Revision:
10:33521d742af1
Parent:
7:379d46fd02c2

File content as of revision 10:33521d742af1:

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Colin Hogben
 *
 * 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.
 */

/**
 * Hardware Abstraction Layer.
 *
 * Implementations or stubs for functions provided by the specific port.
 * Note that two functions are delegated to the user of the library:
 * - mp_hal_stdout_tx_chr
 * - mp_hal_stdin_rx_chr
 */
#include <string.h>
#include "py/mpstate.h"
#include "py/lexer.h"

// Since we have no filesystem, no file exists
mp_import_stat_t mp_import_stat(const char *path) {
    (void)path;
    return MP_IMPORT_STAT_NO_EXIST;
}

mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
    (void)filename;
    return NULL;
}

mp_obj_t mp_builtin_open(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
    (void)n_args;
    (void)args;
    (void)kwargs;
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);

void mp_hal_stdout_tx_chr(char c);

// Text output
void mp_hal_stdout_tx_strn(const char *str, size_t len) {
    while (len--) {
        mp_hal_stdout_tx_chr(*str++);
    }
}

void mp_hal_stdout_tx_strn_cooked(const char *str, size_t len) {
    while (len--) {
        char c = *str++;
        if (c == '\n') {
            mp_hal_stdout_tx_chr('\r');
        }
        mp_hal_stdout_tx_chr(c);
    }
}

void mp_hal_stdout_tx_str(const char *str) {
    mp_hal_stdout_tx_strn(str, strlen(str));
}

void mp_hal_set_interrupt_char(int c) {
    (void)c;
}

mp_uint_t mp_hal_ticks_ms(void) {
    return 0;
}

void mp_hal_delay_ms(mp_uint_t ms) {
    (void)ms;
}

void gc_collect(void) {}
#if ! MICROPY_ENABLE_GC
void gc_dump_info(void) {}
#endif