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/objclosure.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 <string.h>
pythontech 0:5868e8752d44 28
pythontech 0:5868e8752d44 29 #include "py/obj.h"
pythontech 0:5868e8752d44 30 #include "py/runtime.h"
pythontech 0:5868e8752d44 31
pythontech 0:5868e8752d44 32 typedef struct _mp_obj_closure_t {
pythontech 0:5868e8752d44 33 mp_obj_base_t base;
pythontech 0:5868e8752d44 34 mp_obj_t fun;
pythontech 0:5868e8752d44 35 mp_uint_t n_closed;
pythontech 0:5868e8752d44 36 mp_obj_t closed[];
pythontech 0:5868e8752d44 37 } mp_obj_closure_t;
pythontech 0:5868e8752d44 38
pythontech 0:5868e8752d44 39 STATIC mp_obj_t closure_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
pythontech 0:5868e8752d44 40 mp_obj_closure_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 41
pythontech 0:5868e8752d44 42 // need to concatenate closed-over-vars and args
pythontech 0:5868e8752d44 43
pythontech 0:5868e8752d44 44 mp_uint_t n_total = self->n_closed + n_args + 2 * n_kw;
pythontech 0:5868e8752d44 45 if (n_total <= 5) {
pythontech 0:5868e8752d44 46 // use stack to allocate temporary args array
pythontech 0:5868e8752d44 47 mp_obj_t args2[5];
pythontech 0:5868e8752d44 48 memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
pythontech 0:5868e8752d44 49 memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
pythontech 0:5868e8752d44 50 return mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
pythontech 0:5868e8752d44 51 } else {
pythontech 0:5868e8752d44 52 // use heap to allocate temporary args array
pythontech 0:5868e8752d44 53 mp_obj_t *args2 = m_new(mp_obj_t, n_total);
pythontech 0:5868e8752d44 54 memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
pythontech 0:5868e8752d44 55 memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
pythontech 0:5868e8752d44 56 mp_obj_t res = mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
pythontech 0:5868e8752d44 57 m_del(mp_obj_t, args2, n_total);
pythontech 0:5868e8752d44 58 return res;
pythontech 0:5868e8752d44 59 }
pythontech 0:5868e8752d44 60 }
pythontech 0:5868e8752d44 61
pythontech 0:5868e8752d44 62 #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
pythontech 0:5868e8752d44 63 STATIC void closure_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
pythontech 0:5868e8752d44 64 (void)kind;
pythontech 0:5868e8752d44 65 mp_obj_closure_t *o = MP_OBJ_TO_PTR(o_in);
pythontech 0:5868e8752d44 66 mp_print_str(print, "<closure ");
pythontech 0:5868e8752d44 67 mp_obj_print_helper(print, o->fun, PRINT_REPR);
pythontech 0:5868e8752d44 68 mp_printf(print, " at %p, n_closed=%u ", o, (int)o->n_closed);
pythontech 0:5868e8752d44 69 for (mp_uint_t i = 0; i < o->n_closed; i++) {
pythontech 0:5868e8752d44 70 if (o->closed[i] == MP_OBJ_NULL) {
pythontech 0:5868e8752d44 71 mp_print_str(print, "(nil)");
pythontech 0:5868e8752d44 72 } else {
pythontech 0:5868e8752d44 73 mp_obj_print_helper(print, o->closed[i], PRINT_REPR);
pythontech 0:5868e8752d44 74 }
pythontech 0:5868e8752d44 75 mp_print_str(print, " ");
pythontech 0:5868e8752d44 76 }
pythontech 0:5868e8752d44 77 mp_print_str(print, ">");
pythontech 0:5868e8752d44 78 }
pythontech 0:5868e8752d44 79 #endif
pythontech 0:5868e8752d44 80
pythontech 0:5868e8752d44 81 const mp_obj_type_t closure_type = {
pythontech 0:5868e8752d44 82 { &mp_type_type },
pythontech 0:5868e8752d44 83 .name = MP_QSTR_closure,
pythontech 0:5868e8752d44 84 #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
pythontech 0:5868e8752d44 85 .print = closure_print,
pythontech 0:5868e8752d44 86 #endif
pythontech 0:5868e8752d44 87 .call = closure_call,
pythontech 0:5868e8752d44 88 };
pythontech 0:5868e8752d44 89
pythontech 0:5868e8752d44 90 mp_obj_t mp_obj_new_closure(mp_obj_t fun, mp_uint_t n_closed_over, const mp_obj_t *closed) {
pythontech 0:5868e8752d44 91 mp_obj_closure_t *o = m_new_obj_var(mp_obj_closure_t, mp_obj_t, n_closed_over);
pythontech 0:5868e8752d44 92 o->base.type = &closure_type;
pythontech 0:5868e8752d44 93 o->fun = fun;
pythontech 0:5868e8752d44 94 o->n_closed = n_closed_over;
pythontech 0:5868e8752d44 95 memcpy(o->closed, closed, n_closed_over * sizeof(mp_obj_t));
pythontech 0:5868e8752d44 96 return MP_OBJ_FROM_PTR(o);
pythontech 0:5868e8752d44 97 }