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 * Copyright (c) 2014 Paul Sokolovsky
pythontech 0:5868e8752d44 8 *
pythontech 0:5868e8752d44 9 * Permission is hereby granted, free of charge, to any person obtaining a copy
pythontech 0:5868e8752d44 10 * of this software and associated documentation files (the "Software"), to deal
pythontech 0:5868e8752d44 11 * in the Software without restriction, including without limitation the rights
pythontech 0:5868e8752d44 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
pythontech 0:5868e8752d44 13 * copies of the Software, and to permit persons to whom the Software is
pythontech 0:5868e8752d44 14 * furnished to do so, subject to the following conditions:
pythontech 0:5868e8752d44 15 *
pythontech 0:5868e8752d44 16 * The above copyright notice and this permission notice shall be included in
pythontech 0:5868e8752d44 17 * all copies or substantial portions of the Software.
pythontech 0:5868e8752d44 18 *
pythontech 0:5868e8752d44 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pythontech 0:5868e8752d44 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pythontech 0:5868e8752d44 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pythontech 0:5868e8752d44 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pythontech 0:5868e8752d44 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pythontech 0:5868e8752d44 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
pythontech 0:5868e8752d44 25 * THE SOFTWARE.
pythontech 0:5868e8752d44 26 */
pythontech 0:5868e8752d44 27
pythontech 0:5868e8752d44 28 #include <string.h>
pythontech 0:5868e8752d44 29
pythontech 0:5868e8752d44 30 #include "py/nlr.h"
pythontech 0:5868e8752d44 31 #include "py/objtuple.h"
pythontech 0:5868e8752d44 32 #include "py/runtime.h"
pythontech 0:5868e8752d44 33 #include "py/objstr.h"
pythontech 0:5868e8752d44 34
pythontech 0:5868e8752d44 35 #if MICROPY_PY_COLLECTIONS
pythontech 0:5868e8752d44 36
pythontech 0:5868e8752d44 37 typedef struct _mp_obj_namedtuple_type_t {
pythontech 0:5868e8752d44 38 mp_obj_type_t base;
pythontech 0:5868e8752d44 39 mp_uint_t n_fields;
pythontech 0:5868e8752d44 40 qstr fields[];
pythontech 0:5868e8752d44 41 } mp_obj_namedtuple_type_t;
pythontech 0:5868e8752d44 42
pythontech 0:5868e8752d44 43 typedef struct _mp_obj_namedtuple_t {
pythontech 0:5868e8752d44 44 mp_obj_tuple_t tuple;
pythontech 0:5868e8752d44 45 } mp_obj_namedtuple_t;
pythontech 0:5868e8752d44 46
pythontech 0:5868e8752d44 47 STATIC mp_uint_t namedtuple_find_field(const mp_obj_namedtuple_type_t *type, qstr name) {
pythontech 0:5868e8752d44 48 for (mp_uint_t i = 0; i < type->n_fields; i++) {
pythontech 0:5868e8752d44 49 if (type->fields[i] == name) {
pythontech 0:5868e8752d44 50 return i;
pythontech 0:5868e8752d44 51 }
pythontech 0:5868e8752d44 52 }
pythontech 0:5868e8752d44 53 return -1;
pythontech 0:5868e8752d44 54 }
pythontech 0:5868e8752d44 55
pythontech 0:5868e8752d44 56 STATIC void namedtuple_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
pythontech 0:5868e8752d44 57 (void)kind;
pythontech 0:5868e8752d44 58 mp_obj_namedtuple_t *o = MP_OBJ_TO_PTR(o_in);
pythontech 0:5868e8752d44 59 mp_printf(print, "%q", o->tuple.base.type->name);
pythontech 0:5868e8752d44 60 const qstr *fields = ((mp_obj_namedtuple_type_t*)o->tuple.base.type)->fields;
pythontech 0:5868e8752d44 61 mp_obj_attrtuple_print_helper(print, fields, &o->tuple);
pythontech 0:5868e8752d44 62 }
pythontech 0:5868e8752d44 63
pythontech 0:5868e8752d44 64 STATIC void namedtuple_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
pythontech 0:5868e8752d44 65 if (dest[0] == MP_OBJ_NULL) {
pythontech 0:5868e8752d44 66 // load attribute
pythontech 0:5868e8752d44 67 mp_obj_namedtuple_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 68 int id = namedtuple_find_field((mp_obj_namedtuple_type_t*)self->tuple.base.type, attr);
pythontech 0:5868e8752d44 69 if (id == -1) {
pythontech 0:5868e8752d44 70 return;
pythontech 0:5868e8752d44 71 }
pythontech 0:5868e8752d44 72 dest[0] = self->tuple.items[id];
pythontech 0:5868e8752d44 73 } else {
pythontech 0:5868e8752d44 74 // delete/store attribute
pythontech 0:5868e8752d44 75 // provide more detailed error message than we'd get by just returning
pythontech 0:5868e8752d44 76 nlr_raise(mp_obj_new_exception_msg(&mp_type_AttributeError, "can't set attribute"));
pythontech 0:5868e8752d44 77 }
pythontech 0:5868e8752d44 78 }
pythontech 0:5868e8752d44 79
pythontech 0:5868e8752d44 80 STATIC mp_obj_t namedtuple_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
pythontech 0:5868e8752d44 81 const mp_obj_namedtuple_type_t *type = (const mp_obj_namedtuple_type_t*)type_in;
pythontech 0:5868e8752d44 82 size_t num_fields = type->n_fields;
pythontech 0:5868e8752d44 83 if (n_args + n_kw != num_fields) {
pythontech 0:5868e8752d44 84 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 85 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 86 } else if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_NORMAL) {
pythontech 0:5868e8752d44 87 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 88 "function takes %d positional arguments but %d were given",
pythontech 0:5868e8752d44 89 num_fields, n_args + n_kw));
pythontech 0:5868e8752d44 90 } else if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED) {
pythontech 0:5868e8752d44 91 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 92 "%q() takes %d positional arguments but %d were given",
pythontech 0:5868e8752d44 93 type->base.name, num_fields, n_args + n_kw));
pythontech 0:5868e8752d44 94 }
pythontech 0:5868e8752d44 95 }
pythontech 0:5868e8752d44 96
pythontech 0:5868e8752d44 97 mp_obj_t *arg_objects;
pythontech 0:5868e8752d44 98 if (n_args == num_fields) {
pythontech 0:5868e8752d44 99 arg_objects = (mp_obj_t*)args;
pythontech 0:5868e8752d44 100 } else {
pythontech 0:5868e8752d44 101 size_t alloc_size = sizeof(mp_obj_t) * num_fields;
pythontech 0:5868e8752d44 102 arg_objects = alloca(alloc_size);
pythontech 0:5868e8752d44 103 memset(arg_objects, 0, alloc_size);
pythontech 0:5868e8752d44 104
pythontech 0:5868e8752d44 105 for (mp_uint_t i = 0; i < n_args; i++) {
pythontech 0:5868e8752d44 106 arg_objects[i] = args[i];
pythontech 0:5868e8752d44 107 }
pythontech 0:5868e8752d44 108
pythontech 0:5868e8752d44 109 for (mp_uint_t i = n_args; i < n_args + 2 * n_kw; i += 2) {
pythontech 0:5868e8752d44 110 qstr kw = mp_obj_str_get_qstr(args[i]);
pythontech 0:5868e8752d44 111 int id = namedtuple_find_field(type, kw);
pythontech 0:5868e8752d44 112 if (id == -1) {
pythontech 0:5868e8752d44 113 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 114 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 115 } else {
pythontech 0:5868e8752d44 116 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 117 "unexpected keyword argument '%q'", kw));
pythontech 0:5868e8752d44 118 }
pythontech 0:5868e8752d44 119 }
pythontech 0:5868e8752d44 120 if (arg_objects[id] != MP_OBJ_NULL) {
pythontech 0:5868e8752d44 121 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 122 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 123 } else {
pythontech 0:5868e8752d44 124 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 125 "function got multiple values for argument '%q'", kw));
pythontech 0:5868e8752d44 126 }
pythontech 0:5868e8752d44 127 }
pythontech 0:5868e8752d44 128 arg_objects[id] = args[i + 1];
pythontech 0:5868e8752d44 129 }
pythontech 0:5868e8752d44 130 }
pythontech 0:5868e8752d44 131
pythontech 0:5868e8752d44 132 mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(mp_obj_new_tuple(num_fields, arg_objects));
pythontech 0:5868e8752d44 133 tuple->base.type = type_in;
pythontech 0:5868e8752d44 134 return MP_OBJ_FROM_PTR(tuple);
pythontech 0:5868e8752d44 135 }
pythontech 0:5868e8752d44 136
pythontech 0:5868e8752d44 137 STATIC const mp_rom_obj_tuple_t namedtuple_base_tuple = {{&mp_type_tuple}, 1, {MP_ROM_PTR(&mp_type_tuple)}};
pythontech 0:5868e8752d44 138
pythontech 0:5868e8752d44 139 STATIC mp_obj_t mp_obj_new_namedtuple_type(qstr name, mp_uint_t n_fields, mp_obj_t *fields) {
pythontech 0:5868e8752d44 140 mp_obj_namedtuple_type_t *o = m_new_obj_var(mp_obj_namedtuple_type_t, qstr, n_fields);
pythontech 0:5868e8752d44 141 memset(&o->base, 0, sizeof(o->base));
pythontech 0:5868e8752d44 142 o->base.base.type = &mp_type_type;
pythontech 0:5868e8752d44 143 o->base.name = name;
pythontech 0:5868e8752d44 144 o->base.print = namedtuple_print;
pythontech 0:5868e8752d44 145 o->base.make_new = namedtuple_make_new;
pythontech 0:5868e8752d44 146 o->base.unary_op = mp_obj_tuple_unary_op;
pythontech 0:5868e8752d44 147 o->base.binary_op = mp_obj_tuple_binary_op;
pythontech 0:5868e8752d44 148 o->base.attr = namedtuple_attr;
pythontech 0:5868e8752d44 149 o->base.subscr = mp_obj_tuple_subscr;
pythontech 0:5868e8752d44 150 o->base.getiter = mp_obj_tuple_getiter;
pythontech 0:5868e8752d44 151 o->base.bases_tuple = (mp_obj_tuple_t*)(mp_rom_obj_tuple_t*)&namedtuple_base_tuple;
pythontech 0:5868e8752d44 152 o->n_fields = n_fields;
pythontech 0:5868e8752d44 153 for (mp_uint_t i = 0; i < n_fields; i++) {
pythontech 0:5868e8752d44 154 o->fields[i] = mp_obj_str_get_qstr(fields[i]);
pythontech 0:5868e8752d44 155 }
pythontech 0:5868e8752d44 156 return MP_OBJ_FROM_PTR(o);
pythontech 0:5868e8752d44 157 }
pythontech 0:5868e8752d44 158
pythontech 0:5868e8752d44 159 STATIC mp_obj_t new_namedtuple_type(mp_obj_t name_in, mp_obj_t fields_in) {
pythontech 0:5868e8752d44 160 qstr name = mp_obj_str_get_qstr(name_in);
pythontech 0:5868e8752d44 161 mp_uint_t n_fields;
pythontech 0:5868e8752d44 162 mp_obj_t *fields;
pythontech 0:5868e8752d44 163 #if MICROPY_CPYTHON_COMPAT
pythontech 0:5868e8752d44 164 if (MP_OBJ_IS_STR(fields_in)) {
pythontech 0:5868e8752d44 165 fields_in = mp_obj_str_split(1, &fields_in);
pythontech 0:5868e8752d44 166 }
pythontech 0:5868e8752d44 167 #endif
pythontech 0:5868e8752d44 168 if (!MP_OBJ_IS_TYPE(fields_in, &mp_type_list)) {
pythontech 0:5868e8752d44 169 nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "list required"));
pythontech 0:5868e8752d44 170 }
pythontech 0:5868e8752d44 171 mp_obj_list_get(fields_in, &n_fields, &fields);
pythontech 0:5868e8752d44 172 return mp_obj_new_namedtuple_type(name, n_fields, fields);
pythontech 0:5868e8752d44 173 }
pythontech 0:5868e8752d44 174 MP_DEFINE_CONST_FUN_OBJ_2(mp_namedtuple_obj, new_namedtuple_type);
pythontech 0:5868e8752d44 175
pythontech 0:5868e8752d44 176 #endif // MICROPY_PY_COLLECTIONS