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_BC_H__
pythontech 0:5868e8752d44 27 #define __MICROPY_INCLUDED_PY_BC_H__
pythontech 0:5868e8752d44 28
pythontech 0:5868e8752d44 29 #include "py/runtime.h"
pythontech 0:5868e8752d44 30 #include "py/obj.h"
pythontech 0:5868e8752d44 31
pythontech 0:5868e8752d44 32 // bytecode layout:
pythontech 0:5868e8752d44 33 //
pythontech 0:5868e8752d44 34 // n_state : var uint
pythontech 0:5868e8752d44 35 // n_exc_stack : var uint
pythontech 0:5868e8752d44 36 // scope_flags : byte
pythontech 0:5868e8752d44 37 // n_pos_args : byte number of arguments this function takes
pythontech 0:5868e8752d44 38 // n_kwonly_args : byte number of keyword-only arguments this function takes
pythontech 0:5868e8752d44 39 // n_def_pos_args : byte number of default positional arguments
pythontech 0:5868e8752d44 40 //
pythontech 0:5868e8752d44 41 // code_info_size : var uint | code_info_size counts bytes in this chunk
pythontech 0:5868e8752d44 42 // simple_name : var qstr |
pythontech 0:5868e8752d44 43 // source_file : var qstr |
pythontech 0:5868e8752d44 44 // <line number info> |
pythontech 0:5868e8752d44 45 // <word alignment padding> | only needed if bytecode contains pointers
pythontech 0:5868e8752d44 46 //
pythontech 0:5868e8752d44 47 // local_num0 : byte |
pythontech 0:5868e8752d44 48 // ... : byte |
pythontech 0:5868e8752d44 49 // local_numN : byte | N = num_cells
pythontech 0:5868e8752d44 50 // 255 : byte | end of list sentinel
pythontech 0:5868e8752d44 51 // <bytecode> |
pythontech 0:5868e8752d44 52 //
pythontech 0:5868e8752d44 53 //
pythontech 0:5868e8752d44 54 // constant table layout:
pythontech 0:5868e8752d44 55 //
pythontech 0:5868e8752d44 56 // argname0 : obj (qstr)
pythontech 0:5868e8752d44 57 // ... : obj (qstr)
pythontech 0:5868e8752d44 58 // argnameN : obj (qstr) N = num_pos_args + num_kwonly_args
pythontech 0:5868e8752d44 59 // const0 : obj
pythontech 0:5868e8752d44 60 // constN : obj
pythontech 0:5868e8752d44 61
pythontech 0:5868e8752d44 62 // Exception stack entry
pythontech 0:5868e8752d44 63 typedef struct _mp_exc_stack {
pythontech 0:5868e8752d44 64 const byte *handler;
pythontech 0:5868e8752d44 65 // bit 0 is saved currently_in_except_block value
pythontech 0:5868e8752d44 66 // bit 1 is whether the opcode was SETUP_WITH or SETUP_FINALLY
pythontech 0:5868e8752d44 67 mp_obj_t *val_sp;
pythontech 0:5868e8752d44 68 // Saved exception, valid if currently_in_except_block bit is 1
pythontech 0:5868e8752d44 69 mp_obj_base_t *prev_exc;
pythontech 0:5868e8752d44 70 } mp_exc_stack_t;
pythontech 0:5868e8752d44 71
pythontech 0:5868e8752d44 72 typedef struct _mp_code_state {
pythontech 0:5868e8752d44 73 const byte *code_info;
pythontech 0:5868e8752d44 74 const byte *ip;
pythontech 0:5868e8752d44 75 const mp_uint_t *const_table;
pythontech 0:5868e8752d44 76 mp_obj_t *sp;
pythontech 0:5868e8752d44 77 // bit 0 is saved currently_in_except_block value
pythontech 0:5868e8752d44 78 mp_exc_stack_t *exc_sp;
pythontech 0:5868e8752d44 79 mp_obj_dict_t *old_globals;
pythontech 0:5868e8752d44 80 #if MICROPY_STACKLESS
pythontech 0:5868e8752d44 81 struct _mp_code_state *prev;
pythontech 0:5868e8752d44 82 #endif
pythontech 0:5868e8752d44 83 size_t n_state;
pythontech 0:5868e8752d44 84 // Variable-length
pythontech 0:5868e8752d44 85 mp_obj_t state[0];
pythontech 0:5868e8752d44 86 // Variable-length, never accessed by name, only as (void*)(state + n_state)
pythontech 0:5868e8752d44 87 //mp_exc_stack_t exc_state[0];
pythontech 0:5868e8752d44 88 } mp_code_state;
pythontech 0:5868e8752d44 89
pythontech 0:5868e8752d44 90 mp_uint_t mp_decode_uint(const byte **ptr);
pythontech 0:5868e8752d44 91
pythontech 0:5868e8752d44 92 mp_vm_return_kind_t mp_execute_bytecode(mp_code_state *code_state, volatile mp_obj_t inject_exc);
pythontech 0:5868e8752d44 93 mp_code_state *mp_obj_fun_bc_prepare_codestate(mp_obj_t func, size_t n_args, size_t n_kw, const mp_obj_t *args);
pythontech 0:5868e8752d44 94 struct _mp_obj_fun_bc_t;
pythontech 0:5868e8752d44 95 void mp_setup_code_state(mp_code_state *code_state, struct _mp_obj_fun_bc_t *self, size_t n_args, size_t n_kw, const mp_obj_t *args);
pythontech 0:5868e8752d44 96 void mp_bytecode_print(const void *descr, const byte *code, mp_uint_t len, const mp_uint_t *const_table);
pythontech 0:5868e8752d44 97 void mp_bytecode_print2(const byte *code, mp_uint_t len);
pythontech 0:5868e8752d44 98 const byte *mp_bytecode_print_str(const byte *ip);
pythontech 0:5868e8752d44 99 #define mp_bytecode_print_inst(code) mp_bytecode_print2(code, 1)
pythontech 0:5868e8752d44 100
pythontech 0:5868e8752d44 101 // Helper macros to access pointer with least significant bits holding flags
pythontech 0:5868e8752d44 102 #define MP_TAGPTR_PTR(x) ((void*)((uintptr_t)(x) & ~((uintptr_t)3)))
pythontech 0:5868e8752d44 103 #define MP_TAGPTR_TAG0(x) ((uintptr_t)(x) & 1)
pythontech 0:5868e8752d44 104 #define MP_TAGPTR_TAG1(x) ((uintptr_t)(x) & 2)
pythontech 0:5868e8752d44 105 #define MP_TAGPTR_MAKE(ptr, tag) ((void*)((uintptr_t)(ptr) | (tag)))
pythontech 0:5868e8752d44 106
pythontech 0:5868e8752d44 107 #if MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE
pythontech 0:5868e8752d44 108
pythontech 0:5868e8752d44 109 #define MP_OPCODE_BYTE (0)
pythontech 0:5868e8752d44 110 #define MP_OPCODE_QSTR (1)
pythontech 0:5868e8752d44 111 #define MP_OPCODE_VAR_UINT (2)
pythontech 0:5868e8752d44 112 #define MP_OPCODE_OFFSET (3)
pythontech 0:5868e8752d44 113
pythontech 0:5868e8752d44 114 uint mp_opcode_format(const byte *ip, size_t *opcode_size);
pythontech 0:5868e8752d44 115
pythontech 0:5868e8752d44 116 #endif
pythontech 0:5868e8752d44 117
pythontech 0:5868e8752d44 118 #endif // __MICROPY_INCLUDED_PY_BC_H__