Colin Hogben / micropython

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.

Diff: lib/utils/pyexec.c

Revision:
2:c89e95946844
Parent:
0:5868e8752d44
Child:
5:1d19b8110e11
--- a/lib/utils/pyexec.c	Sat Apr 16 22:42:43 2016 +0100
+++ b/lib/utils/pyexec.c	Sat Apr 16 22:43:41 2016 +0100
@@ -50,22 +50,33 @@
 #define EXEC_FLAG_PRINT_EOF (1)
 #define EXEC_FLAG_ALLOW_DEBUGGING (2)
 #define EXEC_FLAG_IS_REPL (4)
+#define EXEC_FLAG_SOURCE_IS_RAW_CODE (8)
 
 // parses, compiles and executes the code in the lexer
 // frees the lexer before returning
 // EXEC_FLAG_PRINT_EOF prints 2 EOF chars: 1 after normal output, 1 after exception output
 // EXEC_FLAG_ALLOW_DEBUGGING allows debugging info to be printed after executing the code
 // EXEC_FLAG_IS_REPL is used for REPL inputs (flag passed on to mp_compile)
-STATIC int parse_compile_execute(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, int exec_flags) {
+STATIC int parse_compile_execute(void *source, mp_parse_input_kind_t input_kind, int exec_flags) {
     int ret = 0;
     uint32_t start = 0;
 
     nlr_buf_t nlr;
     if (nlr_push(&nlr) == 0) {
-        // parse and compile the script
-        qstr source_name = lex->source_name;
-        mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
-        mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, exec_flags & EXEC_FLAG_IS_REPL);
+        mp_obj_t module_fun;
+        #if MICROPY_MODULE_FROZEN_MPY
+        if (exec_flags & EXEC_FLAG_SOURCE_IS_RAW_CODE) {
+            // source is a raw_code object, create the function
+            module_fun = mp_make_function_from_raw_code(source, MP_OBJ_NULL, MP_OBJ_NULL);
+        } else
+        #endif
+        {
+            // source is a lexer, parse and compile the script
+            mp_lexer_t *lex = source;
+            qstr source_name = lex->source_name;
+            mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
+            module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, exec_flags & EXEC_FLAG_IS_REPL);
+        }
 
         // execute code
         mp_hal_set_interrupt_char(CHAR_CTRL_C); // allow ctrl-C to interrupt us
@@ -488,14 +499,24 @@
 
 #if MICROPY_MODULE_FROZEN
 int pyexec_frozen_module(const char *name) {
-    mp_lexer_t *lex = mp_find_frozen_module(name, strlen(name));
+    void *frozen_data;
+    int frozen_type = mp_find_frozen_module(name, strlen(name), &frozen_data);
+
+    switch (frozen_type) {
+        #if MICROPY_MODULE_FROZEN_STR
+        case MP_FROZEN_STR:
+            return parse_compile_execute(frozen_data, MP_PARSE_FILE_INPUT, 0);
+        #endif
 
-    if (lex == NULL) {
-        printf("could not find module '%s'\n", name);
-        return false;
+        #if MICROPY_MODULE_FROZEN_MPY
+        case MP_FROZEN_MPY:
+            return parse_compile_execute(frozen_data, MP_PARSE_FILE_INPUT, EXEC_FLAG_SOURCE_IS_RAW_CODE);
+        #endif
+
+        default:
+            printf("could not find module '%s'\n", name);
+            return false;
     }
-
-    return parse_compile_execute(lex, MP_PARSE_FILE_INPUT, 0);
 }
 #endif