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:
pythontech
Date:
Sat Apr 16 17:11:56 2016 +0000
Revision:
0:5868e8752d44
Split off library from repl

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 #ifndef __MICROPY_INCLUDED_PY_NLR_H__
pythontech 0:5868e8752d44 27 #define __MICROPY_INCLUDED_PY_NLR_H__
pythontech 0:5868e8752d44 28
pythontech 0:5868e8752d44 29 // non-local return
pythontech 0:5868e8752d44 30 // exception handling, basically a stack of setjmp/longjmp buffers
pythontech 0:5868e8752d44 31
pythontech 0:5868e8752d44 32 #include <limits.h>
pythontech 0:5868e8752d44 33 #include <setjmp.h>
pythontech 0:5868e8752d44 34 #include <assert.h>
pythontech 0:5868e8752d44 35
pythontech 0:5868e8752d44 36 #include "py/mpconfig.h"
pythontech 0:5868e8752d44 37
pythontech 0:5868e8752d44 38 typedef struct _nlr_buf_t nlr_buf_t;
pythontech 0:5868e8752d44 39 struct _nlr_buf_t {
pythontech 0:5868e8752d44 40 // the entries here must all be machine word size
pythontech 0:5868e8752d44 41 nlr_buf_t *prev;
pythontech 0:5868e8752d44 42 void *ret_val; // always a concrete object (an exception instance)
pythontech 0:5868e8752d44 43 #if !defined(MICROPY_NLR_SETJMP) || !MICROPY_NLR_SETJMP
pythontech 0:5868e8752d44 44 #if defined(__i386__)
pythontech 0:5868e8752d44 45 void *regs[6];
pythontech 0:5868e8752d44 46 #elif defined(__x86_64__)
pythontech 0:5868e8752d44 47 #if defined(__CYGWIN__)
pythontech 0:5868e8752d44 48 void *regs[12];
pythontech 0:5868e8752d44 49 #else
pythontech 0:5868e8752d44 50 void *regs[8];
pythontech 0:5868e8752d44 51 #endif
pythontech 0:5868e8752d44 52 #elif defined(__thumb2__) || defined(__thumb__) || defined(__arm__)
pythontech 0:5868e8752d44 53 void *regs[10];
pythontech 0:5868e8752d44 54 #elif defined(__xtensa__)
pythontech 0:5868e8752d44 55 void *regs[10];
pythontech 0:5868e8752d44 56 #else
pythontech 0:5868e8752d44 57 #define MICROPY_NLR_SETJMP (1)
pythontech 0:5868e8752d44 58 //#warning "No native NLR support for this arch, using setjmp implementation"
pythontech 0:5868e8752d44 59 #endif
pythontech 0:5868e8752d44 60 #endif
pythontech 0:5868e8752d44 61
pythontech 0:5868e8752d44 62 #if MICROPY_NLR_SETJMP
pythontech 0:5868e8752d44 63 jmp_buf jmpbuf;
pythontech 0:5868e8752d44 64 #endif
pythontech 0:5868e8752d44 65 };
pythontech 0:5868e8752d44 66
pythontech 0:5868e8752d44 67 #if MICROPY_NLR_SETJMP
pythontech 0:5868e8752d44 68 #include "py/mpstate.h"
pythontech 0:5868e8752d44 69
pythontech 0:5868e8752d44 70 NORETURN void nlr_setjmp_jump(void *val);
pythontech 0:5868e8752d44 71 // nlr_push() must be defined as a macro, because "The stack context will be
pythontech 0:5868e8752d44 72 // invalidated if the function which called setjmp() returns."
pythontech 0:5868e8752d44 73 #define nlr_push(buf) ((buf)->prev = MP_STATE_VM(nlr_top), MP_STATE_VM(nlr_top) = (buf), setjmp((buf)->jmpbuf))
pythontech 0:5868e8752d44 74 #define nlr_pop() { MP_STATE_VM(nlr_top) = MP_STATE_VM(nlr_top)->prev; }
pythontech 0:5868e8752d44 75 #define nlr_jump(val) nlr_setjmp_jump(val)
pythontech 0:5868e8752d44 76 #else
pythontech 0:5868e8752d44 77 unsigned int nlr_push(nlr_buf_t *);
pythontech 0:5868e8752d44 78 void nlr_pop(void);
pythontech 0:5868e8752d44 79 NORETURN void nlr_jump(void *val);
pythontech 0:5868e8752d44 80 #endif
pythontech 0:5868e8752d44 81
pythontech 0:5868e8752d44 82 // This must be implemented by a port. It's called by nlr_jump
pythontech 0:5868e8752d44 83 // if no nlr buf has been pushed. It must not return, but rather
pythontech 0:5868e8752d44 84 // should bail out with a fatal error.
pythontech 0:5868e8752d44 85 void nlr_jump_fail(void *val);
pythontech 0:5868e8752d44 86
pythontech 0:5868e8752d44 87 // use nlr_raise instead of nlr_jump so that debugging is easier
pythontech 0:5868e8752d44 88 #ifndef DEBUG
pythontech 0:5868e8752d44 89 #define nlr_raise(val) nlr_jump(MP_OBJ_TO_PTR(val))
pythontech 0:5868e8752d44 90 #else
pythontech 0:5868e8752d44 91 #include "mpstate.h"
pythontech 0:5868e8752d44 92 #define nlr_raise(val) \
pythontech 0:5868e8752d44 93 do { \
pythontech 0:5868e8752d44 94 /*printf("nlr_raise: nlr_top=%p\n", MP_STATE_VM(nlr_top)); \
pythontech 0:5868e8752d44 95 fflush(stdout);*/ \
pythontech 0:5868e8752d44 96 void *_val = MP_OBJ_TO_PTR(val); \
pythontech 0:5868e8752d44 97 assert(_val != NULL); \
pythontech 0:5868e8752d44 98 assert(mp_obj_is_exception_instance(val)); \
pythontech 0:5868e8752d44 99 nlr_jump(_val); \
pythontech 0:5868e8752d44 100 } while (0)
pythontech 0:5868e8752d44 101
pythontech 0:5868e8752d44 102 #if !MICROPY_NLR_SETJMP
pythontech 0:5868e8752d44 103 #define nlr_push(val) \
pythontech 0:5868e8752d44 104 assert(MP_STATE_VM(nlr_top) != val),nlr_push(val)
pythontech 0:5868e8752d44 105
pythontech 0:5868e8752d44 106 /*
pythontech 0:5868e8752d44 107 #define nlr_push(val) \
pythontech 0:5868e8752d44 108 printf("nlr_push: before: nlr_top=%p, val=%p\n", MP_STATE_VM(nlr_top), val),assert(MP_STATE_VM(nlr_top) != val),nlr_push(val)
pythontech 0:5868e8752d44 109 #endif
pythontech 0:5868e8752d44 110 */
pythontech 0:5868e8752d44 111 #endif
pythontech 0:5868e8752d44 112
pythontech 0:5868e8752d44 113 #endif
pythontech 0:5868e8752d44 114
pythontech 0:5868e8752d44 115 #endif // __MICROPY_INCLUDED_PY_NLR_H__