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.
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 <stdlib.h>
pythontech 0:5868e8752d44 28
pythontech 0:5868e8752d44 29 #include "py/nlr.h"
pythontech 0:5868e8752d44 30 #include "py/runtime0.h"
pythontech 0:5868e8752d44 31 #include "py/runtime.h"
pythontech 0:5868e8752d44 32
pythontech 0:5868e8752d44 33 /******************************************************************************/
pythontech 0:5868e8752d44 34 /* range iterator */
pythontech 0:5868e8752d44 35
pythontech 0:5868e8752d44 36 typedef struct _mp_obj_range_it_t {
pythontech 0:5868e8752d44 37 mp_obj_base_t base;
pythontech 0:5868e8752d44 38 // TODO make these values generic objects or something
pythontech 0:5868e8752d44 39 mp_int_t cur;
pythontech 0:5868e8752d44 40 mp_int_t stop;
pythontech 0:5868e8752d44 41 mp_int_t step;
pythontech 0:5868e8752d44 42 } mp_obj_range_it_t;
pythontech 0:5868e8752d44 43
pythontech 0:5868e8752d44 44 STATIC mp_obj_t range_it_iternext(mp_obj_t o_in) {
pythontech 0:5868e8752d44 45 mp_obj_range_it_t *o = MP_OBJ_TO_PTR(o_in);
pythontech 0:5868e8752d44 46 if ((o->step > 0 && o->cur < o->stop) || (o->step < 0 && o->cur > o->stop)) {
pythontech 0:5868e8752d44 47 mp_obj_t o_out = MP_OBJ_NEW_SMALL_INT(o->cur);
pythontech 0:5868e8752d44 48 o->cur += o->step;
pythontech 0:5868e8752d44 49 return o_out;
pythontech 0:5868e8752d44 50 } else {
pythontech 0:5868e8752d44 51 return MP_OBJ_STOP_ITERATION;
pythontech 0:5868e8752d44 52 }
pythontech 0:5868e8752d44 53 }
pythontech 0:5868e8752d44 54
pythontech 0:5868e8752d44 55 STATIC const mp_obj_type_t range_it_type = {
pythontech 0:5868e8752d44 56 { &mp_type_type },
pythontech 0:5868e8752d44 57 .name = MP_QSTR_iterator,
pythontech 0:5868e8752d44 58 .getiter = mp_identity,
pythontech 0:5868e8752d44 59 .iternext = range_it_iternext,
pythontech 0:5868e8752d44 60 };
pythontech 0:5868e8752d44 61
pythontech 0:5868e8752d44 62 STATIC mp_obj_t mp_obj_new_range_iterator(mp_int_t cur, mp_int_t stop, mp_int_t step) {
pythontech 0:5868e8752d44 63 mp_obj_range_it_t *o = m_new_obj(mp_obj_range_it_t);
pythontech 0:5868e8752d44 64 o->base.type = &range_it_type;
pythontech 0:5868e8752d44 65 o->cur = cur;
pythontech 0:5868e8752d44 66 o->stop = stop;
pythontech 0:5868e8752d44 67 o->step = step;
pythontech 0:5868e8752d44 68 return MP_OBJ_FROM_PTR(o);
pythontech 0:5868e8752d44 69 }
pythontech 0:5868e8752d44 70
pythontech 0:5868e8752d44 71 /******************************************************************************/
pythontech 0:5868e8752d44 72 /* range */
pythontech 0:5868e8752d44 73
pythontech 0:5868e8752d44 74 typedef struct _mp_obj_range_t {
pythontech 0:5868e8752d44 75 mp_obj_base_t base;
pythontech 0:5868e8752d44 76 // TODO make these values generic objects or something
pythontech 0:5868e8752d44 77 mp_int_t start;
pythontech 0:5868e8752d44 78 mp_int_t stop;
pythontech 0:5868e8752d44 79 mp_int_t step;
pythontech 0:5868e8752d44 80 } mp_obj_range_t;
pythontech 0:5868e8752d44 81
pythontech 0:5868e8752d44 82 STATIC void range_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pythontech 0:5868e8752d44 83 (void)kind;
pythontech 0:5868e8752d44 84 mp_obj_range_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 85 mp_printf(print, "range(" INT_FMT ", " INT_FMT "", self->start, self->stop);
pythontech 0:5868e8752d44 86 if (self->step == 1) {
pythontech 0:5868e8752d44 87 mp_print_str(print, ")");
pythontech 0:5868e8752d44 88 } else {
pythontech 0:5868e8752d44 89 mp_printf(print, ", " INT_FMT ")", self->step);
pythontech 0:5868e8752d44 90 }
pythontech 0:5868e8752d44 91 }
pythontech 0:5868e8752d44 92
pythontech 0:5868e8752d44 93 STATIC mp_obj_t range_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
pythontech 0:5868e8752d44 94 mp_arg_check_num(n_args, n_kw, 1, 3, false);
pythontech 0:5868e8752d44 95
pythontech 0:5868e8752d44 96 mp_obj_range_t *o = m_new_obj(mp_obj_range_t);
pythontech 0:5868e8752d44 97 o->base.type = type;
pythontech 0:5868e8752d44 98 o->start = 0;
pythontech 0:5868e8752d44 99 o->step = 1;
pythontech 0:5868e8752d44 100
pythontech 0:5868e8752d44 101 if (n_args == 1) {
pythontech 0:5868e8752d44 102 o->stop = mp_obj_get_int(args[0]);
pythontech 0:5868e8752d44 103 } else {
pythontech 0:5868e8752d44 104 o->start = mp_obj_get_int(args[0]);
pythontech 0:5868e8752d44 105 o->stop = mp_obj_get_int(args[1]);
pythontech 0:5868e8752d44 106 if (n_args == 3) {
pythontech 0:5868e8752d44 107 // TODO check step is non-zero
pythontech 0:5868e8752d44 108 o->step = mp_obj_get_int(args[2]);
pythontech 0:5868e8752d44 109 }
pythontech 0:5868e8752d44 110 }
pythontech 0:5868e8752d44 111
pythontech 0:5868e8752d44 112 return MP_OBJ_FROM_PTR(o);
pythontech 0:5868e8752d44 113 }
pythontech 0:5868e8752d44 114
pythontech 0:5868e8752d44 115 STATIC mp_int_t range_len(mp_obj_range_t *self) {
pythontech 0:5868e8752d44 116 // When computing length, need to take into account step!=1 and step<0.
pythontech 0:5868e8752d44 117 mp_int_t len = self->stop - self->start + self->step;
pythontech 0:5868e8752d44 118 if (self->step > 0) {
pythontech 0:5868e8752d44 119 len -= 1;
pythontech 0:5868e8752d44 120 } else {
pythontech 0:5868e8752d44 121 len += 1;
pythontech 0:5868e8752d44 122 }
pythontech 0:5868e8752d44 123 len = len / self->step;
pythontech 0:5868e8752d44 124 if (len < 0) {
pythontech 0:5868e8752d44 125 len = 0;
pythontech 0:5868e8752d44 126 }
pythontech 0:5868e8752d44 127 return len;
pythontech 0:5868e8752d44 128 }
pythontech 0:5868e8752d44 129
pythontech 0:5868e8752d44 130 STATIC mp_obj_t range_unary_op(mp_uint_t op, mp_obj_t self_in) {
pythontech 0:5868e8752d44 131 mp_obj_range_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 132 mp_int_t len = range_len(self);
pythontech 0:5868e8752d44 133 switch (op) {
pythontech 0:5868e8752d44 134 case MP_UNARY_OP_BOOL: return mp_obj_new_bool(len > 0);
pythontech 0:5868e8752d44 135 case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(len);
pythontech 0:5868e8752d44 136 default: return MP_OBJ_NULL; // op not supported
pythontech 0:5868e8752d44 137 }
pythontech 0:5868e8752d44 138 }
pythontech 0:5868e8752d44 139
pythontech 0:5868e8752d44 140 STATIC mp_obj_t range_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
pythontech 0:5868e8752d44 141 if (value == MP_OBJ_SENTINEL) {
pythontech 0:5868e8752d44 142 // load
pythontech 0:5868e8752d44 143 mp_obj_range_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 144 mp_int_t len = range_len(self);
pythontech 0:5868e8752d44 145 #if MICROPY_PY_BUILTINS_SLICE
pythontech 0:5868e8752d44 146 if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
pythontech 0:5868e8752d44 147 mp_bound_slice_t slice;
pythontech 0:5868e8752d44 148 mp_seq_get_fast_slice_indexes(len, index, &slice);
pythontech 0:5868e8752d44 149 mp_obj_range_t *o = m_new_obj(mp_obj_range_t);
pythontech 0:5868e8752d44 150 o->base.type = &mp_type_range;
pythontech 0:5868e8752d44 151 o->start = self->start + slice.start * self->step;
pythontech 0:5868e8752d44 152 o->stop = self->start + slice.stop * self->step;
pythontech 0:5868e8752d44 153 o->step = slice.step * self->step;
pythontech 0:5868e8752d44 154 return MP_OBJ_FROM_PTR(o);
pythontech 0:5868e8752d44 155 }
pythontech 0:5868e8752d44 156 #endif
pythontech 0:5868e8752d44 157 uint index_val = mp_get_index(self->base.type, len, index, false);
pythontech 0:5868e8752d44 158 return MP_OBJ_NEW_SMALL_INT(self->start + index_val * self->step);
pythontech 0:5868e8752d44 159 } else {
pythontech 0:5868e8752d44 160 return MP_OBJ_NULL; // op not supported
pythontech 0:5868e8752d44 161 }
pythontech 0:5868e8752d44 162 }
pythontech 0:5868e8752d44 163
pythontech 0:5868e8752d44 164 STATIC mp_obj_t range_getiter(mp_obj_t o_in) {
pythontech 0:5868e8752d44 165 mp_obj_range_t *o = MP_OBJ_TO_PTR(o_in);
pythontech 0:5868e8752d44 166 return mp_obj_new_range_iterator(o->start, o->stop, o->step);
pythontech 0:5868e8752d44 167 }
pythontech 0:5868e8752d44 168
pythontech 0:5868e8752d44 169
pythontech 0:5868e8752d44 170 #if MICROPY_PY_BUILTINS_RANGE_ATTRS
pythontech 0:5868e8752d44 171 STATIC void range_attr(mp_obj_t o_in, qstr attr, mp_obj_t *dest) {
pythontech 0:5868e8752d44 172 if (dest[0] != MP_OBJ_NULL) {
pythontech 0:5868e8752d44 173 // not load attribute
pythontech 0:5868e8752d44 174 return;
pythontech 0:5868e8752d44 175 }
pythontech 0:5868e8752d44 176 mp_obj_range_t *o = MP_OBJ_TO_PTR(o_in);
pythontech 0:5868e8752d44 177 if (attr == MP_QSTR_start) {
pythontech 0:5868e8752d44 178 dest[0] = mp_obj_new_int(o->start);
pythontech 0:5868e8752d44 179 } else if (attr == MP_QSTR_stop) {
pythontech 0:5868e8752d44 180 dest[0] = mp_obj_new_int(o->stop);
pythontech 0:5868e8752d44 181 } else if (attr == MP_QSTR_step) {
pythontech 0:5868e8752d44 182 dest[0] = mp_obj_new_int(o->step);
pythontech 0:5868e8752d44 183 }
pythontech 0:5868e8752d44 184 }
pythontech 0:5868e8752d44 185 #endif
pythontech 0:5868e8752d44 186
pythontech 0:5868e8752d44 187 const mp_obj_type_t mp_type_range = {
pythontech 0:5868e8752d44 188 { &mp_type_type },
pythontech 0:5868e8752d44 189 .name = MP_QSTR_range,
pythontech 0:5868e8752d44 190 .print = range_print,
pythontech 0:5868e8752d44 191 .make_new = range_make_new,
pythontech 0:5868e8752d44 192 .unary_op = range_unary_op,
pythontech 0:5868e8752d44 193 .subscr = range_subscr,
pythontech 0:5868e8752d44 194 .getiter = range_getiter,
pythontech 0:5868e8752d44 195 #if MICROPY_PY_BUILTINS_RANGE_ATTRS
pythontech 0:5868e8752d44 196 .attr = range_attr,
pythontech 0:5868e8752d44 197 #endif
pythontech 0:5868e8752d44 198 };