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 #include <assert.h>
pythontech 0:5868e8752d44 29
pythontech 0:5868e8752d44 30 #include "py/nlr.h"
pythontech 0:5868e8752d44 31 #include "py/runtime.h"
pythontech 0:5868e8752d44 32
pythontech 0:5868e8752d44 33 void mp_arg_check_num(size_t n_args, size_t n_kw, size_t n_args_min, size_t n_args_max, bool takes_kw) {
pythontech 0:5868e8752d44 34 // TODO maybe take the function name as an argument so we can print nicer error messages
pythontech 0:5868e8752d44 35
pythontech 0:5868e8752d44 36 if (n_kw && !takes_kw) {
pythontech 0:5868e8752d44 37 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 38 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 39 } else {
pythontech 0:5868e8752d44 40 nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
pythontech 0:5868e8752d44 41 "function does not take keyword arguments"));
pythontech 0:5868e8752d44 42 }
pythontech 0:5868e8752d44 43 }
pythontech 0:5868e8752d44 44
pythontech 0:5868e8752d44 45 if (n_args_min == n_args_max) {
pythontech 0:5868e8752d44 46 if (n_args != n_args_min) {
pythontech 0:5868e8752d44 47 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 48 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 49 } else {
pythontech 0:5868e8752d44 50 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 51 "function takes %d positional arguments but %d were given",
pythontech 0:5868e8752d44 52 n_args_min, n_args));
pythontech 0:5868e8752d44 53 }
pythontech 0:5868e8752d44 54 }
pythontech 0:5868e8752d44 55 } else {
pythontech 0:5868e8752d44 56 if (n_args < n_args_min) {
pythontech 0:5868e8752d44 57 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 58 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 59 } else {
pythontech 0:5868e8752d44 60 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 61 "function missing %d required positional arguments",
pythontech 0:5868e8752d44 62 n_args_min - n_args));
pythontech 0:5868e8752d44 63 }
pythontech 0:5868e8752d44 64 } else if (n_args > n_args_max) {
pythontech 0:5868e8752d44 65 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 66 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 67 } else {
pythontech 0:5868e8752d44 68 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 69 "function expected at most %d arguments, got %d",
pythontech 0:5868e8752d44 70 n_args_max, n_args));
pythontech 0:5868e8752d44 71 }
pythontech 0:5868e8752d44 72 }
pythontech 0:5868e8752d44 73 }
pythontech 0:5868e8752d44 74 }
pythontech 0:5868e8752d44 75
pythontech 0:5868e8752d44 76 void mp_arg_parse_all(size_t n_pos, const mp_obj_t *pos, mp_map_t *kws, size_t n_allowed, const mp_arg_t *allowed, mp_arg_val_t *out_vals) {
pythontech 0:5868e8752d44 77 size_t pos_found = 0, kws_found = 0;
pythontech 0:5868e8752d44 78 for (size_t i = 0; i < n_allowed; i++) {
pythontech 0:5868e8752d44 79 mp_obj_t given_arg;
pythontech 0:5868e8752d44 80 if (i < n_pos) {
pythontech 0:5868e8752d44 81 if (allowed[i].flags & MP_ARG_KW_ONLY) {
pythontech 0:5868e8752d44 82 goto extra_positional;
pythontech 0:5868e8752d44 83 }
pythontech 0:5868e8752d44 84 pos_found++;
pythontech 0:5868e8752d44 85 given_arg = pos[i];
pythontech 0:5868e8752d44 86 } else {
pythontech 0:5868e8752d44 87 mp_map_elem_t *kw = mp_map_lookup(kws, MP_OBJ_NEW_QSTR(allowed[i].qst), MP_MAP_LOOKUP);
pythontech 0:5868e8752d44 88 if (kw == NULL) {
pythontech 0:5868e8752d44 89 if (allowed[i].flags & MP_ARG_REQUIRED) {
pythontech 0:5868e8752d44 90 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 91 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 92 } else {
pythontech 0:5868e8752d44 93 nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
pythontech 0:5868e8752d44 94 "'%q' argument required", allowed[i].qst));
pythontech 0:5868e8752d44 95 }
pythontech 0:5868e8752d44 96 }
pythontech 0:5868e8752d44 97 out_vals[i] = allowed[i].defval;
pythontech 0:5868e8752d44 98 continue;
pythontech 0:5868e8752d44 99 } else {
pythontech 0:5868e8752d44 100 kws_found++;
pythontech 0:5868e8752d44 101 given_arg = kw->value;
pythontech 0:5868e8752d44 102 }
pythontech 0:5868e8752d44 103 }
pythontech 0:5868e8752d44 104 if ((allowed[i].flags & MP_ARG_KIND_MASK) == MP_ARG_BOOL) {
pythontech 0:5868e8752d44 105 out_vals[i].u_bool = mp_obj_is_true(given_arg);
pythontech 0:5868e8752d44 106 } else if ((allowed[i].flags & MP_ARG_KIND_MASK) == MP_ARG_INT) {
pythontech 0:5868e8752d44 107 out_vals[i].u_int = mp_obj_get_int(given_arg);
pythontech 0:5868e8752d44 108 } else if ((allowed[i].flags & MP_ARG_KIND_MASK) == MP_ARG_OBJ) {
pythontech 0:5868e8752d44 109 out_vals[i].u_obj = given_arg;
pythontech 0:5868e8752d44 110 } else {
pythontech 0:5868e8752d44 111 assert(0);
pythontech 0:5868e8752d44 112 }
pythontech 0:5868e8752d44 113 }
pythontech 0:5868e8752d44 114 if (pos_found < n_pos) {
pythontech 0:5868e8752d44 115 extra_positional:
pythontech 0:5868e8752d44 116 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 117 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 118 } else {
pythontech 0:5868e8752d44 119 // TODO better error message
pythontech 0:5868e8752d44 120 nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
pythontech 0:5868e8752d44 121 "extra positional arguments given"));
pythontech 0:5868e8752d44 122 }
pythontech 0:5868e8752d44 123 }
pythontech 0:5868e8752d44 124 if (kws_found < kws->used) {
pythontech 0:5868e8752d44 125 if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
pythontech 0:5868e8752d44 126 mp_arg_error_terse_mismatch();
pythontech 0:5868e8752d44 127 } else {
pythontech 0:5868e8752d44 128 // TODO better error message
pythontech 0:5868e8752d44 129 nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
pythontech 0:5868e8752d44 130 "extra keyword arguments given"));
pythontech 0:5868e8752d44 131 }
pythontech 0:5868e8752d44 132 }
pythontech 0:5868e8752d44 133 }
pythontech 0:5868e8752d44 134
pythontech 0:5868e8752d44 135 void mp_arg_parse_all_kw_array(size_t n_pos, size_t n_kw, const mp_obj_t *args, size_t n_allowed, const mp_arg_t *allowed, mp_arg_val_t *out_vals) {
pythontech 0:5868e8752d44 136 mp_map_t kw_args;
pythontech 0:5868e8752d44 137 mp_map_init_fixed_table(&kw_args, n_kw, args + n_pos);
pythontech 0:5868e8752d44 138 mp_arg_parse_all(n_pos, args, &kw_args, n_allowed, allowed, out_vals);
pythontech 0:5868e8752d44 139 }
pythontech 0:5868e8752d44 140
pythontech 0:5868e8752d44 141 #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE || _MSC_VER
pythontech 0:5868e8752d44 142 NORETURN void mp_arg_error_terse_mismatch(void) {
pythontech 0:5868e8752d44 143 nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "argument num/types mismatch"));
pythontech 0:5868e8752d44 144 }
pythontech 0:5868e8752d44 145 #endif
pythontech 0:5868e8752d44 146
pythontech 0:5868e8752d44 147 #if MICROPY_CPYTHON_COMPAT
pythontech 0:5868e8752d44 148 NORETURN void mp_arg_error_unimpl_kw(void) {
pythontech 0:5868e8752d44 149 mp_not_implemented("keyword argument(s) not yet implemented - use normal args instead");
pythontech 0:5868e8752d44 150 }
pythontech 0:5868e8752d44 151 #endif