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/lexerunix.c@10:33521d742af1, 2016-04-27 (annotated)

Committer:
Colin Hogben
Date:
Wed Apr 27 22:11:29 2016 +0100
Revision:
10:33521d742af1
Parent:
0:5868e8752d44 
Update README and version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pythontech 0:5868e8752d44 1 /*
pythontech 0:5868e8752d44 2 * This file is part of the Micro Python project, http://micropython.org/
pythontech 0:5868e8752d44 3 *
pythontech 0:5868e8752d44 4 * The MIT License (MIT)
pythontech 0:5868e8752d44 5 *
pythontech 0:5868e8752d44 6 * Copyright (c) 2013, 2014 Damien P. George
pythontech 0:5868e8752d44 7 *
pythontech 0:5868e8752d44 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
pythontech 0:5868e8752d44 9 * of this software and associated documentation files (the "Software"), to deal
pythontech 0:5868e8752d44 10 * in the Software without restriction, including without limitation the rights
pythontech 0:5868e8752d44 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
pythontech 0:5868e8752d44 12 * copies of the Software, and to permit persons to whom the Software is
pythontech 0:5868e8752d44 13 * furnished to do so, subject to the following conditions:
pythontech 0:5868e8752d44 14 *
pythontech 0:5868e8752d44 15 * The above copyright notice and this permission notice shall be included in
pythontech 0:5868e8752d44 16 * all copies or substantial portions of the Software.
pythontech 0:5868e8752d44 17 *
pythontech 0:5868e8752d44 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pythontech 0:5868e8752d44 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pythontech 0:5868e8752d44 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pythontech 0:5868e8752d44 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pythontech 0:5868e8752d44 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pythontech 0:5868e8752d44 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
pythontech 0:5868e8752d44 24 * THE SOFTWARE.
pythontech 0:5868e8752d44 25 */
pythontech 0:5868e8752d44 26
pythontech 0:5868e8752d44 27 #include "py/mpconfig.h"
pythontech 0:5868e8752d44 28
pythontech 0:5868e8752d44 29 #if MICROPY_HELPER_LEXER_UNIX
pythontech 0:5868e8752d44 30
pythontech 0:5868e8752d44 31 #include <stdio.h>
pythontech 0:5868e8752d44 32 #include <stdint.h>
pythontech 0:5868e8752d44 33 #include <unistd.h>
pythontech 0:5868e8752d44 34 #include <fcntl.h>
pythontech 0:5868e8752d44 35 #include <sys/stat.h>
pythontech 0:5868e8752d44 36 #include <sys/types.h>
pythontech 0:5868e8752d44 37
pythontech 0:5868e8752d44 38 #include "py/lexer.h"
pythontech 0:5868e8752d44 39
pythontech 0:5868e8752d44 40 typedef struct _mp_lexer_file_buf_t {
pythontech 0:5868e8752d44 41 int fd;
pythontech 0:5868e8752d44 42 bool close_fd;
pythontech 0:5868e8752d44 43 byte buf[20];
pythontech 0:5868e8752d44 44 mp_uint_t len;
pythontech 0:5868e8752d44 45 mp_uint_t pos;
pythontech 0:5868e8752d44 46 } mp_lexer_file_buf_t;
pythontech 0:5868e8752d44 47
pythontech 0:5868e8752d44 48 STATIC mp_uint_t file_buf_next_byte(mp_lexer_file_buf_t *fb) {
pythontech 0:5868e8752d44 49 if (fb->pos >= fb->len) {
pythontech 0:5868e8752d44 50 if (fb->len == 0) {
pythontech 0:5868e8752d44 51 return MP_LEXER_EOF;
pythontech 0:5868e8752d44 52 } else {
pythontech 0:5868e8752d44 53 int n = read(fb->fd, fb->buf, sizeof(fb->buf));
pythontech 0:5868e8752d44 54 if (n <= 0) {
pythontech 0:5868e8752d44 55 fb->len = 0;
pythontech 0:5868e8752d44 56 return MP_LEXER_EOF;
pythontech 0:5868e8752d44 57 }
pythontech 0:5868e8752d44 58 fb->len = n;
pythontech 0:5868e8752d44 59 fb->pos = 0;
pythontech 0:5868e8752d44 60 }
pythontech 0:5868e8752d44 61 }
pythontech 0:5868e8752d44 62 return fb->buf[fb->pos++];
pythontech 0:5868e8752d44 63 }
pythontech 0:5868e8752d44 64
pythontech 0:5868e8752d44 65 STATIC void file_buf_close(mp_lexer_file_buf_t *fb) {
pythontech 0:5868e8752d44 66 if (fb->close_fd) {
pythontech 0:5868e8752d44 67 close(fb->fd);
pythontech 0:5868e8752d44 68 }
pythontech 0:5868e8752d44 69 m_del_obj(mp_lexer_file_buf_t, fb);
pythontech 0:5868e8752d44 70 }
pythontech 0:5868e8752d44 71
pythontech 0:5868e8752d44 72 mp_lexer_t *mp_lexer_new_from_fd(qstr filename, int fd, bool close_fd) {
pythontech 0:5868e8752d44 73 mp_lexer_file_buf_t *fb = m_new_obj_maybe(mp_lexer_file_buf_t);
pythontech 0:5868e8752d44 74 if (fb == NULL) {
pythontech 0:5868e8752d44 75 if (close_fd) {
pythontech 0:5868e8752d44 76 close(fd);
pythontech 0:5868e8752d44 77 }
pythontech 0:5868e8752d44 78 return NULL;
pythontech 0:5868e8752d44 79 }
pythontech 0:5868e8752d44 80 fb->fd = fd;
pythontech 0:5868e8752d44 81 fb->close_fd = close_fd;
pythontech 0:5868e8752d44 82 int n = read(fb->fd, fb->buf, sizeof(fb->buf));
pythontech 0:5868e8752d44 83 fb->len = n;
pythontech 0:5868e8752d44 84 fb->pos = 0;
pythontech 0:5868e8752d44 85 return mp_lexer_new(filename, fb, (mp_lexer_stream_next_byte_t)file_buf_next_byte, (mp_lexer_stream_close_t)file_buf_close);
pythontech 0:5868e8752d44 86 }
pythontech 0:5868e8752d44 87
pythontech 0:5868e8752d44 88 mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
pythontech 0:5868e8752d44 89 int fd = open(filename, O_RDONLY);
pythontech 0:5868e8752d44 90 if (fd < 0) {
pythontech 0:5868e8752d44 91 return NULL;
pythontech 0:5868e8752d44 92 }
pythontech 0:5868e8752d44 93 return mp_lexer_new_from_fd(qstr_from_str(filename), fd, true);
pythontech 0:5868e8752d44 94 }
pythontech 0:5868e8752d44 95
pythontech 0:5868e8752d44 96 #endif // MICROPY_HELPER_LEXER_UNIX