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 "py/mpstate.h"
pythontech 0:5868e8752d44 28 #include "py/nlr.h"
pythontech 0:5868e8752d44 29 #include "py/builtin.h"
pythontech 0:5868e8752d44 30 #include "py/objlist.h"
pythontech 0:5868e8752d44 31 #include "py/objtuple.h"
pythontech 0:5868e8752d44 32 #include "py/objstr.h"
pythontech 0:5868e8752d44 33 #include "py/objint.h"
pythontech 0:5868e8752d44 34 #include "py/stream.h"
pythontech 0:5868e8752d44 35
pythontech 0:5868e8752d44 36 #if MICROPY_PY_SYS
pythontech 0:5868e8752d44 37
pythontech 0:5868e8752d44 38 #include "genhdr/mpversion.h"
pythontech 0:5868e8752d44 39
pythontech 0:5868e8752d44 40 /// \module sys - system specific functions
pythontech 0:5868e8752d44 41
pythontech 0:5868e8752d44 42 // defined per port; type of these is irrelevant, just need pointer
pythontech 0:5868e8752d44 43 extern struct _mp_dummy_t mp_sys_stdin_obj;
pythontech 0:5868e8752d44 44 extern struct _mp_dummy_t mp_sys_stdout_obj;
pythontech 0:5868e8752d44 45 extern struct _mp_dummy_t mp_sys_stderr_obj;
pythontech 0:5868e8752d44 46
pythontech 0:5868e8752d44 47 #if MICROPY_PY_IO
pythontech 0:5868e8752d44 48 const mp_print_t mp_sys_stdout_print = {&mp_sys_stdout_obj, mp_stream_write_adaptor};
pythontech 0:5868e8752d44 49 #endif
pythontech 0:5868e8752d44 50
pythontech 0:5868e8752d44 51 /// \constant version - Python language version that this implementation conforms to, as a string
pythontech 0:5868e8752d44 52 STATIC const MP_DEFINE_STR_OBJ(version_obj, "3.4.0");
pythontech 0:5868e8752d44 53
pythontech 0:5868e8752d44 54 /// \constant version_info - Python language version that this implementation conforms to, as a tuple of ints
pythontech 0:5868e8752d44 55 #define I(n) MP_OBJ_NEW_SMALL_INT(n)
pythontech 0:5868e8752d44 56 // TODO: CPython is now at 5-element array, but save 2 els so far...
pythontech 0:5868e8752d44 57 STATIC const mp_obj_tuple_t mp_sys_version_info_obj = {{&mp_type_tuple}, 3, {I(3), I(4), I(0)}};
pythontech 0:5868e8752d44 58
pythontech 0:5868e8752d44 59 // sys.implementation object
pythontech 0:5868e8752d44 60 // this holds the MicroPython version
pythontech 0:5868e8752d44 61 STATIC const mp_obj_tuple_t mp_sys_implementation_version_info_obj = {
pythontech 0:5868e8752d44 62 {&mp_type_tuple},
pythontech 0:5868e8752d44 63 3,
pythontech 0:5868e8752d44 64 { I(MICROPY_VERSION_MAJOR), I(MICROPY_VERSION_MINOR), I(MICROPY_VERSION_MICRO) }
pythontech 0:5868e8752d44 65 };
pythontech 0:5868e8752d44 66 #if MICROPY_PY_ATTRTUPLE
pythontech 0:5868e8752d44 67 STATIC const qstr impl_fields[] = { MP_QSTR_name, MP_QSTR_version };
pythontech 0:5868e8752d44 68 STATIC MP_DEFINE_ATTRTUPLE(
pythontech 0:5868e8752d44 69 mp_sys_implementation_obj,
pythontech 0:5868e8752d44 70 impl_fields,
pythontech 0:5868e8752d44 71 2,
pythontech 0:5868e8752d44 72 MP_ROM_QSTR(MP_QSTR_micropython),
pythontech 0:5868e8752d44 73 MP_ROM_PTR(&mp_sys_implementation_version_info_obj)
pythontech 0:5868e8752d44 74 );
pythontech 0:5868e8752d44 75 #else
pythontech 0:5868e8752d44 76 STATIC const mp_obj_tuple_t mp_sys_implementation_obj = {
pythontech 0:5868e8752d44 77 {&mp_type_tuple},
pythontech 0:5868e8752d44 78 2,
pythontech 0:5868e8752d44 79 {
pythontech 0:5868e8752d44 80 MP_OBJ_NEW_QSTR(MP_QSTR_micropython),
pythontech 0:5868e8752d44 81 (mp_obj_t)&mp_sys_implementation_version_info_obj,
pythontech 0:5868e8752d44 82 }
pythontech 0:5868e8752d44 83 };
pythontech 0:5868e8752d44 84 #endif
pythontech 0:5868e8752d44 85
pythontech 0:5868e8752d44 86 #undef I
pythontech 0:5868e8752d44 87
pythontech 0:5868e8752d44 88 #ifdef MICROPY_PY_SYS_PLATFORM
pythontech 0:5868e8752d44 89 /// \constant platform - the platform that Micro Python is running on
pythontech 0:5868e8752d44 90 STATIC const MP_DEFINE_STR_OBJ(platform_obj, MICROPY_PY_SYS_PLATFORM);
pythontech 0:5868e8752d44 91 #endif
pythontech 0:5868e8752d44 92
pythontech 0:5868e8752d44 93 /// \function exit([retval])
pythontech 0:5868e8752d44 94 /// Raise a `SystemExit` exception. If an argument is given, it is the
pythontech 0:5868e8752d44 95 /// value given to `SystemExit`.
pythontech 0:5868e8752d44 96 STATIC mp_obj_t mp_sys_exit(size_t n_args, const mp_obj_t *args) {
pythontech 0:5868e8752d44 97 mp_obj_t exc;
pythontech 0:5868e8752d44 98 if (n_args == 0) {
pythontech 0:5868e8752d44 99 exc = mp_obj_new_exception(&mp_type_SystemExit);
pythontech 0:5868e8752d44 100 } else {
pythontech 0:5868e8752d44 101 exc = mp_obj_new_exception_arg1(&mp_type_SystemExit, args[0]);
pythontech 0:5868e8752d44 102 }
pythontech 0:5868e8752d44 103 nlr_raise(exc);
pythontech 0:5868e8752d44 104 }
pythontech 0:5868e8752d44 105 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_sys_exit_obj, 0, 1, mp_sys_exit);
pythontech 0:5868e8752d44 106
pythontech 0:5868e8752d44 107 STATIC mp_obj_t mp_sys_print_exception(size_t n_args, const mp_obj_t *args) {
pythontech 0:5868e8752d44 108 #if MICROPY_PY_IO
pythontech 0:5868e8752d44 109 void *stream_obj = &mp_sys_stdout_obj;
pythontech 0:5868e8752d44 110 if (n_args > 1) {
pythontech 0:5868e8752d44 111 stream_obj = MP_OBJ_TO_PTR(args[1]); // XXX may fail
pythontech 0:5868e8752d44 112 }
pythontech 0:5868e8752d44 113
pythontech 0:5868e8752d44 114 mp_print_t print = {stream_obj, mp_stream_write_adaptor};
pythontech 0:5868e8752d44 115 mp_obj_print_exception(&print, args[0]);
pythontech 0:5868e8752d44 116 #else
pythontech 0:5868e8752d44 117 (void)n_args;
pythontech 0:5868e8752d44 118 mp_obj_print_exception(&mp_plat_print, args[0]);
pythontech 0:5868e8752d44 119 #endif
pythontech 0:5868e8752d44 120
pythontech 0:5868e8752d44 121 return mp_const_none;
pythontech 0:5868e8752d44 122 }
pythontech 0:5868e8752d44 123 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_sys_print_exception_obj, 1, 2, mp_sys_print_exception);
pythontech 0:5868e8752d44 124
pythontech 0:5868e8752d44 125 #if MICROPY_PY_SYS_EXC_INFO
pythontech 0:5868e8752d44 126 STATIC mp_obj_t mp_sys_exc_info(void) {
pythontech 0:5868e8752d44 127 mp_obj_t cur_exc = MP_OBJ_FROM_PTR(MP_STATE_VM(cur_exception));
pythontech 0:5868e8752d44 128 mp_obj_tuple_t *t = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL));
pythontech 0:5868e8752d44 129
pythontech 0:5868e8752d44 130 if (cur_exc == MP_OBJ_NULL) {
pythontech 0:5868e8752d44 131 t->items[0] = mp_const_none;
pythontech 0:5868e8752d44 132 t->items[1] = mp_const_none;
pythontech 0:5868e8752d44 133 t->items[2] = mp_const_none;
pythontech 0:5868e8752d44 134 return MP_OBJ_FROM_PTR(t);
pythontech 0:5868e8752d44 135 }
pythontech 0:5868e8752d44 136
pythontech 0:5868e8752d44 137 t->items[0] = MP_OBJ_FROM_PTR(mp_obj_get_type(cur_exc));
pythontech 0:5868e8752d44 138 t->items[1] = cur_exc;
pythontech 0:5868e8752d44 139 t->items[2] = mp_const_none;
pythontech 0:5868e8752d44 140 return MP_OBJ_FROM_PTR(t);
pythontech 0:5868e8752d44 141 }
pythontech 0:5868e8752d44 142 MP_DEFINE_CONST_FUN_OBJ_0(mp_sys_exc_info_obj, mp_sys_exc_info);
pythontech 0:5868e8752d44 143 #endif
pythontech 0:5868e8752d44 144
pythontech 0:5868e8752d44 145 STATIC const mp_rom_map_elem_t mp_module_sys_globals_table[] = {
pythontech 0:5868e8752d44 146 { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_sys) },
pythontech 0:5868e8752d44 147
pythontech 0:5868e8752d44 148 { MP_ROM_QSTR(MP_QSTR_path), MP_ROM_PTR(&MP_STATE_VM(mp_sys_path_obj)) },
pythontech 0:5868e8752d44 149 { MP_ROM_QSTR(MP_QSTR_argv), MP_ROM_PTR(&MP_STATE_VM(mp_sys_argv_obj)) },
pythontech 0:5868e8752d44 150 { MP_ROM_QSTR(MP_QSTR_version), MP_ROM_PTR(&version_obj) },
pythontech 0:5868e8752d44 151 { MP_ROM_QSTR(MP_QSTR_version_info), MP_ROM_PTR(&mp_sys_version_info_obj) },
pythontech 0:5868e8752d44 152 { MP_ROM_QSTR(MP_QSTR_implementation), MP_ROM_PTR(&mp_sys_implementation_obj) },
pythontech 0:5868e8752d44 153 #ifdef MICROPY_PY_SYS_PLATFORM
pythontech 0:5868e8752d44 154 { MP_ROM_QSTR(MP_QSTR_platform), MP_ROM_PTR(&platform_obj) },
pythontech 0:5868e8752d44 155 #endif
pythontech 0:5868e8752d44 156 /// \constant byteorder - the byte order of the system ("little" or "big")
pythontech 0:5868e8752d44 157 #if MP_ENDIANNESS_LITTLE
pythontech 0:5868e8752d44 158 { MP_ROM_QSTR(MP_QSTR_byteorder), MP_ROM_QSTR(MP_QSTR_little) },
pythontech 0:5868e8752d44 159 #else
pythontech 0:5868e8752d44 160 { MP_ROM_QSTR(MP_QSTR_byteorder), MP_ROM_QSTR(MP_QSTR_big) },
pythontech 0:5868e8752d44 161 #endif
pythontech 0:5868e8752d44 162
pythontech 0:5868e8752d44 163 #if MICROPY_PY_SYS_MAXSIZE
pythontech 0:5868e8752d44 164 #if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_NONE
pythontech 0:5868e8752d44 165 // INT_MAX is not representable as small int, as we know that small int
pythontech 0:5868e8752d44 166 // takes one bit for tag. So, we have little choice but to provide this
pythontech 0:5868e8752d44 167 // value. Apps also should be careful to not try to compare sys.maxsize
pythontech 0:5868e8752d44 168 // with some number (which may not fit in available int size), but instead
pythontech 0:5868e8752d44 169 // count number of significant bits in sys.maxsize.
pythontech 0:5868e8752d44 170 { MP_ROM_QSTR(MP_QSTR_maxsize), MP_OBJ_NEW_SMALL_INT(INT_MAX >> 1) },
pythontech 0:5868e8752d44 171 #else
pythontech 0:5868e8752d44 172 { MP_ROM_QSTR(MP_QSTR_maxsize), MP_ROM_PTR(&mp_maxsize_obj) },
pythontech 0:5868e8752d44 173 #endif
pythontech 0:5868e8752d44 174 #endif
pythontech 0:5868e8752d44 175
pythontech 0:5868e8752d44 176 #if MICROPY_PY_SYS_EXIT
pythontech 0:5868e8752d44 177 // documented per-port
pythontech 0:5868e8752d44 178 { MP_ROM_QSTR(MP_QSTR_exit), MP_ROM_PTR(&mp_sys_exit_obj) },
pythontech 0:5868e8752d44 179 #endif
pythontech 0:5868e8752d44 180
pythontech 0:5868e8752d44 181 #if MICROPY_PY_SYS_STDFILES
pythontech 0:5868e8752d44 182 // documented per-port
pythontech 0:5868e8752d44 183 { MP_ROM_QSTR(MP_QSTR_stdin), MP_ROM_PTR(&mp_sys_stdin_obj) },
pythontech 0:5868e8752d44 184 { MP_ROM_QSTR(MP_QSTR_stdout), MP_ROM_PTR(&mp_sys_stdout_obj) },
pythontech 0:5868e8752d44 185 { MP_ROM_QSTR(MP_QSTR_stderr), MP_ROM_PTR(&mp_sys_stderr_obj) },
pythontech 0:5868e8752d44 186 #endif
pythontech 0:5868e8752d44 187
pythontech 0:5868e8752d44 188 #if MICROPY_PY_SYS_MODULES
pythontech 0:5868e8752d44 189 { MP_ROM_QSTR(MP_QSTR_modules), MP_ROM_PTR(&MP_STATE_VM(mp_loaded_modules_dict)) },
pythontech 0:5868e8752d44 190 #endif
pythontech 0:5868e8752d44 191 #if MICROPY_PY_SYS_EXC_INFO
pythontech 0:5868e8752d44 192 { MP_ROM_QSTR(MP_QSTR_exc_info), MP_ROM_PTR(&mp_sys_exc_info_obj) },
pythontech 0:5868e8752d44 193 #endif
pythontech 0:5868e8752d44 194
pythontech 0:5868e8752d44 195 /*
pythontech 0:5868e8752d44 196 * Extensions to CPython
pythontech 0:5868e8752d44 197 */
pythontech 0:5868e8752d44 198
pythontech 0:5868e8752d44 199 { MP_ROM_QSTR(MP_QSTR_print_exception), MP_ROM_PTR(&mp_sys_print_exception_obj) },
pythontech 0:5868e8752d44 200 };
pythontech 0:5868e8752d44 201
pythontech 0:5868e8752d44 202 STATIC MP_DEFINE_CONST_DICT(mp_module_sys_globals, mp_module_sys_globals_table);
pythontech 0:5868e8752d44 203
pythontech 0:5868e8752d44 204 const mp_obj_module_t mp_module_sys = {
pythontech 0:5868e8752d44 205 .base = { &mp_type_module },
pythontech 0:5868e8752d44 206 .name = MP_QSTR_sys,
pythontech 0:5868e8752d44 207 .globals = (mp_obj_dict_t*)&mp_module_sys_globals,
pythontech 0:5868e8752d44 208 };
pythontech 0:5868e8752d44 209
pythontech 0:5868e8752d44 210 #endif