STATIC mp_import_stat_t stat_dir_or_file(vstr_t *path) {
//printf("stat %s\n", vstr_str(path));
mp_import_stat_t stat = mp_import_stat(vstr_str(path));
if (stat == MP_IMPORT_STAT_DIR) {
return stat;
}
vstr_add_str(path, ".py");
stat = mp_import_stat(vstr_str(path));
if (stat == MP_IMPORT_STAT_FILE) {
return stat;
}
return MP_IMPORT_STAT_NO_EXIST;
}
STATIC void do_load(mp_obj_t module_obj, vstr_t *file) {
// create the lexer
mp_lexer_t *lex = mp_lexer_new_from_file(vstr_str(file));
if (lex == NULL) {
// we verified the file exists using stat, but lexer could still fail
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "No module named '%s'", vstr_str(file)));
}
qstr source_name = mp_lexer_source_name(lex);
// save the old context
mp_obj_dict_t *old_locals = mp_locals_get();
mp_obj_dict_t *old_globals = mp_globals_get();
// set the new context
mp_locals_set(mp_obj_module_get_globals(module_obj));
mp_globals_set(mp_obj_module_get_globals(module_obj));
// parse the imported script
mp_parse_error_kind_t parse_error_kind;
mp_parse_node_t pn = mp_parse(lex, MP_PARSE_FILE_INPUT, &parse_error_kind);
if (pn == MP_PARSE_NODE_NULL) {
// parse error; clean up and raise exception
mp_obj_t exc = mp_parse_make_exception(lex, parse_error_kind);
mp_lexer_free(lex);
mp_locals_set(old_locals);
mp_globals_set(old_globals);
nlr_raise(exc);
}
mp_lexer_free(lex);
// compile the imported script
mp_obj_t module_fun = mp_compile(pn, source_name, MP_EMIT_OPT_NONE, false);
mp_parse_node_free(pn);
if (module_fun == mp_const_none) {
// TODO handle compile error correctly
mp_locals_set(old_locals);
mp_globals_set(old_globals);
nlr_raise(mp_obj_new_exception_msg(&mp_type_SyntaxError, "Syntax error in imported module"));
}
// complied successfully, execute it
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_call_function_0(module_fun);
nlr_pop();
} else {
// exception; restore context and re-raise same exception
mp_locals_set(old_locals);
mp_globals_set(old_globals);
nlr_raise(nlr.ret_val);
}
mp_locals_set(old_locals);
mp_globals_set(old_globals);
}
static void
Realloc_Vstring (vstring *v, int newlen)
{
/* make sure realloc doesn't just add 1 char */
newlen = MAX (newlen, vstr_max(*v)+80);
set_vstr_max(*v, newlen);
set_vstr_str(*v, (char*) realloc(vstr_str(*v), vstr_max(*v)));
}
mp_lexer_t *mp_import_open_file(qstr mod_name) {
vstr_t *vstr = vstr_new();
if (import_base_dir != NULL) {
vstr_printf(vstr, "%s/", import_base_dir);
}
vstr_printf(vstr, "%s.py", qstr_str(mod_name));
return mp_lexer_new_from_file(vstr_str(vstr)); // TODO does lexer need to copy the string? can we free it here?
}
STATIC mp_import_stat_t stat_dir_or_file(vstr_t *path) {
mp_import_stat_t stat = mp_import_stat_any(vstr_null_terminated_str(path));
DEBUG_printf("stat %s: %d\n", vstr_str(path), stat);
if (stat == MP_IMPORT_STAT_DIR) {
return stat;
}
// not a directory, add .py and try as a file
vstr_add_str(path, ".py");
return stat_file_py_or_mpy(path);
}
STATIC mp_import_stat_t stat_dir_or_file(vstr_t *path) {
mp_import_stat_t stat = mp_import_stat(vstr_null_terminated_str(path));
DEBUG_printf("stat %s: %d\n", vstr_str(path), stat);
if (stat == MP_IMPORT_STAT_DIR) {
return stat;
}
vstr_add_str(path, ".py");
stat = mp_import_stat(vstr_null_terminated_str(path));
if (stat == MP_IMPORT_STAT_FILE) {
return stat;
}
return MP_IMPORT_STAT_NO_EXIST;
}
/* add string to vstring */
vstring
vstr_concat (vstring v, const char *s)
{
int slen = strlen(s);
if (vstr_len(v) + slen > vstr_max(v)) {
Realloc_Vstring (&v, vstr_len(v) + slen);
}
/* may be nulls in vstr, so can't concat from beginning;
* instead just copy onto end of string. */
strcpy(vstr_str(v)+vstr_len(v), s);
set_vstr_len(v, vstr_len(v) + slen);
return v;
}
STATIC mp_obj_t stream_readall(mp_obj_t self_in) {
struct _mp_obj_base_t *o = (struct _mp_obj_base_t *)self_in;
if (o->type->stream_p == NULL || o->type->stream_p->read == NULL) {
// CPython: io.UnsupportedOperation, OSError subclass
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "Operation not supported"));
}
int total_size = 0;
vstr_t *vstr = vstr_new_size(DEFAULT_BUFFER_SIZE);
char *buf = vstr_str(vstr);
char *p = buf;
int error;
int current_read = DEFAULT_BUFFER_SIZE;
while (true) {
mp_int_t out_sz = o->type->stream_p->read(self_in, p, current_read, &error);
if (out_sz == -1) {
if (is_nonblocking_error(error)) {
// With non-blocking streams, we read as much as we can.
// If we read nothing, return None, just like read().
// Otherwise, return data read so far.
if (total_size == 0) {
return mp_const_none;
}
break;
}
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "[Errno %d]", error));
}
if (out_sz == 0) {
break;
}
total_size += out_sz;
if (out_sz < current_read) {
current_read -= out_sz;
p += out_sz;
} else {
current_read = DEFAULT_BUFFER_SIZE;
p = vstr_extend(vstr, current_read);
if (p == NULL) {
// TODO
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError/*&mp_type_RuntimeError*/, "Out of memory"));
}
}
}
mp_obj_t s = mp_obj_new_str_of_type(STREAM_CONTENT_TYPE(o->type->stream_p), (byte*)vstr->buf, total_size);
vstr_free(vstr);
return s;
}
STATIC void do_load(mp_obj_t module_obj, vstr_t *file) {
// create the lexer
mp_lexer_t *lex = mp_lexer_new_from_file(vstr_str(file));
if (lex == NULL) {
// we verified the file exists using stat, but lexer could still fail
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "No module named '%s'", vstr_str(file)));
}
#if MICROPY_PY___FILE__
qstr source_name = mp_lexer_source_name(lex);
mp_store_attr(module_obj, MP_QSTR___file__, MP_OBJ_NEW_QSTR(source_name));
#endif
// parse, compile and execute the module in its context
mp_obj_dict_t *mod_globals = mp_obj_module_get_globals(module_obj);
mp_parse_compile_execute(lex, MP_PARSE_FILE_INPUT, mod_globals, mod_globals);
}
void exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_exception_t *o = o_in;
if (o->msg != NULL) {
print(env, "%s: %s", qstr_str(o->id), vstr_str(o->msg));
} else {
// Yes, that's how CPython has it
if (kind == PRINT_REPR) {
print(env, "%s", qstr_str(o->id));
}
if (kind == PRINT_STR) {
if (o->args.len == 0) {
print(env, "");
return;
} else if (o->args.len == 1) {
mp_obj_print_helper(print, env, o->args.items[0], PRINT_STR);
return;
}
}
tuple_print(print, env, &o->args, kind);
}
}
STATIC mp_import_stat_t stat_dir_or_file(vstr_t *path) {
mp_import_stat_t stat = mp_import_stat(vstr_null_terminated_str(path));
DEBUG_printf("stat %s: %d\n", vstr_str(path), stat);
if (stat == MP_IMPORT_STAT_DIR) {
return stat;
}
vstr_add_str(path, ".py");
stat = mp_import_stat(vstr_null_terminated_str(path));
if (stat == MP_IMPORT_STAT_FILE) {
return stat;
}
#if MICROPY_PERSISTENT_CODE_LOAD
vstr_ins_byte(path, path->len - 2, 'm');
stat = mp_import_stat(vstr_null_terminated_str(path));
if (stat == MP_IMPORT_STAT_FILE) {
return stat;
}
#endif
return MP_IMPORT_STAT_NO_EXIST;
}
static void mp_lexer_next_token_into(mp_lexer_t *lex, mp_token_t *tok, bool first_token) {
// skip white space and comments
bool had_physical_newline = false;
while (!is_end(lex)) {
if (is_physical_newline(lex)) {
had_physical_newline = true;
next_char(lex);
} else if (is_whitespace(lex)) {
next_char(lex);
} else if (is_char(lex, '#')) {
next_char(lex);
while (!is_end(lex) && !is_physical_newline(lex)) {
next_char(lex);
}
// had_physical_newline will be set on next loop
} else if (is_char(lex, '\\')) {
// backslash (outside string literals) must appear just before a physical newline
next_char(lex);
if (!is_physical_newline(lex)) {
// TODO SyntaxError
assert(0);
} else {
next_char(lex);
}
} else {
break;
}
}
// set token source information
tok->src_name = lex->name;
tok->src_line = lex->line;
tok->src_column = lex->column;
// start new token text
vstr_reset(&lex->vstr);
if (first_token && lex->line == 1 && lex->column != 1) {
// check that the first token is in the first column
// if first token is not on first line, we get a physical newline and
// this check is done as part of normal indent/dedent checking below
// (done to get equivalence with CPython)
tok->kind = MP_TOKEN_INDENT;
} else if (lex->emit_dent < 0) {
tok->kind = MP_TOKEN_DEDENT;
lex->emit_dent += 1;
} else if (lex->emit_dent > 0) {
tok->kind = MP_TOKEN_INDENT;
lex->emit_dent -= 1;
} else if (had_physical_newline && lex->nested_bracket_level == 0) {
tok->kind = MP_TOKEN_NEWLINE;
uint num_spaces = lex->column - 1;
lex->emit_dent = 0;
if (num_spaces == indent_top(lex)) {
} else if (num_spaces > indent_top(lex)) {
indent_push(lex, num_spaces);
lex->emit_dent += 1;
} else {
while (num_spaces < indent_top(lex)) {
indent_pop(lex);
lex->emit_dent -= 1;
}
if (num_spaces != indent_top(lex)) {
tok->kind = MP_TOKEN_DEDENT_MISMATCH;
}
}
} else if (is_end(lex)) {
if (indent_top(lex) > 0) {
tok->kind = MP_TOKEN_NEWLINE;
lex->emit_dent = 0;
while (indent_top(lex) > 0) {
indent_pop(lex);
lex->emit_dent -= 1;
}
} else {
tok->kind = MP_TOKEN_END;
}
} else if (is_char_or(lex, '\'', '\"')
|| (is_char_or3(lex, 'r', 'u', 'b') && is_char_following_or(lex, '\'', '\"'))
|| ((is_char_and(lex, 'r', 'b') || is_char_and(lex, 'b', 'r')) && is_char_following_following_or(lex, '\'', '\"'))) {
// a string or bytes literal
// parse type codes
bool is_raw = false;
bool is_bytes = false;
if (is_char(lex, 'u')) {
next_char(lex);
} else if (is_char(lex, 'b')) {
is_bytes = true;
next_char(lex);
if (is_char(lex, 'r')) {
is_raw = true;
next_char(lex);
}
} else if (is_char(lex, 'r')) {
is_raw = true;
next_char(lex);
if (is_char(lex, 'b')) {
is_bytes = true;
next_char(lex);
}
}
// set token kind
if (is_bytes) {
tok->kind = MP_TOKEN_BYTES;
} else {
tok->kind = MP_TOKEN_STRING;
}
// get first quoting character
char quote_char = '\'';
if (is_char(lex, '\"')) {
quote_char = '\"';
}
next_char(lex);
// work out if it's a single or triple quoted literal
int num_quotes;
if (is_char_and(lex, quote_char, quote_char)) {
// triple quotes
next_char(lex);
next_char(lex);
num_quotes = 3;
} else {
// single quotes
num_quotes = 1;
}
// parse the literal
int n_closing = 0;
while (!is_end(lex) && (num_quotes > 1 || !is_char(lex, '\n')) && n_closing < num_quotes) {
if (is_char(lex, quote_char)) {
n_closing += 1;
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
} else {
n_closing = 0;
if (!is_raw && is_char(lex, '\\')) {
next_char(lex);
unichar c = CUR_CHAR(lex);
switch (c) {
case MP_LEXER_CHAR_EOF: break; // TODO a proper error message?
case '\n': c = MP_LEXER_CHAR_EOF; break; // TODO check this works correctly (we are supposed to ignore it
case '\\': break;
case '\'': break;
case '"': break;
case 'a': c = 0x07; break;
case 'b': c = 0x08; break;
case 't': c = 0x09; break;
case 'n': c = 0x0a; break;
case 'v': c = 0x0b; break;
case 'f': c = 0x0c; break;
case 'r': c = 0x0d; break;
// TODO \ooo octal
case 'x': // TODO \xhh
case 'N': // TODO \N{name} only in strings
case 'u': // TODO \uxxxx only in strings
case 'U': // TODO \Uxxxxxxxx only in strings
default: break; // TODO error message
}
if (c != MP_LEXER_CHAR_EOF) {
vstr_add_char(&lex->vstr, c);
}
} else {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
}
}
next_char(lex);
}
// check we got the required end quotes
if (n_closing < num_quotes) {
tok->kind = MP_TOKEN_LONELY_STRING_OPEN;
}
// cut off the end quotes from the token text
vstr_cut_tail(&lex->vstr, n_closing);
} else if (is_head_of_identifier(lex)) {
tok->kind = MP_TOKEN_NAME;
// get first char
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
// get tail chars
while (!is_end(lex) && is_tail_of_identifier(lex)) {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
}
} else if (is_digit(lex) || (is_char(lex, '.') && is_following_digit(lex))) {
tok->kind = MP_TOKEN_NUMBER;
// get first char
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
// get tail chars
while (!is_end(lex)) {
if (is_char_or(lex, 'e', 'E')) {
vstr_add_char(&lex->vstr, 'e');
next_char(lex);
if (is_char(lex, '+') || is_char(lex, '-')) {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
}
} else if (is_letter(lex) || is_digit(lex) || is_char_or(lex, '_', '.')) {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
} else {
break;
}
}
} else {
// search for encoded delimiter or operator
const char *t = tok_enc;
uint tok_enc_index = 0;
for (; *t != 0 && !is_char(lex, *t); t += 1) {
if (*t == 'e' || *t == 'c') {
t += 1;
} else if (*t == 'E') {
tok_enc_index -= 1;
t += 1;
}
tok_enc_index += 1;
}
next_char(lex);
if (*t == 0) {
// didn't match any delimiter or operator characters
tok->kind = MP_TOKEN_INVALID;
} else {
// matched a delimiter or operator character
// get the maximum characters for a valid token
t += 1;
uint t_index = tok_enc_index;
for (;;) {
for (; *t == 'e'; t += 1) {
t += 1;
t_index += 1;
if (is_char(lex, *t)) {
next_char(lex);
tok_enc_index = t_index;
break;
}
}
if (*t == 'E') {
t += 1;
if (is_char(lex, *t)) {
next_char(lex);
tok_enc_index = t_index;
} else {
tok->kind = MP_TOKEN_INVALID;
}
break;
}
if (*t == 'c') {
t += 1;
t_index += 1;
if (is_char(lex, *t)) {
next_char(lex);
tok_enc_index = t_index;
t += 1;
} else {
break;
}
} else {
break;
}
}
// set token kind
tok->kind = tok_enc_kind[tok_enc_index];
// compute bracket level for implicit line joining
if (tok->kind == MP_TOKEN_DEL_PAREN_OPEN || tok->kind == MP_TOKEN_DEL_BRACKET_OPEN || tok->kind == MP_TOKEN_DEL_BRACE_OPEN) {
lex->nested_bracket_level += 1;
} else if (tok->kind == MP_TOKEN_DEL_PAREN_CLOSE || tok->kind == MP_TOKEN_DEL_BRACKET_CLOSE || tok->kind == MP_TOKEN_DEL_BRACE_CLOSE) {
lex->nested_bracket_level -= 1;
}
}
}
// point token text to vstr buffer
tok->str = vstr_str(&lex->vstr);
tok->len = vstr_len(&lex->vstr);
// check for keywords
if (tok->kind == MP_TOKEN_NAME) {
for (int i = 0; tok_kw[i] != NULL; i++) {
if (str_strn_equal(tok_kw[i], tok->str, tok->len)) {
tok->kind = MP_TOKEN_KW_FALSE + i;
break;
}
}
}
}
mp_obj_t mp_builtin___import__(mp_uint_t n_args, const mp_obj_t *args) {
#if DEBUG_PRINT
DEBUG_printf("__import__:\n");
for (mp_uint_t i = 0; i < n_args; i++) {
DEBUG_printf(" ");
mp_obj_print(args[i], PRINT_REPR);
DEBUG_printf("\n");
}
#endif
mp_obj_t module_name = args[0];
mp_obj_t fromtuple = mp_const_none;
mp_int_t level = 0;
if (n_args >= 4) {
fromtuple = args[3];
if (n_args >= 5) {
level = MP_OBJ_SMALL_INT_VALUE(args[4]);
}
}
mp_uint_t mod_len;
const char *mod_str = mp_obj_str_get_data(module_name, &mod_len);
if (level != 0) {
// What we want to do here is to take name of current module,
// chop <level> trailing components, and concatenate with passed-in
// module name, thus resolving relative import name into absolue.
// This even appears to be correct per
// http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name
// "Relative imports use a module's __name__ attribute to determine that
// module's position in the package hierarchy."
level--;
mp_obj_t this_name_q = mp_obj_dict_get(mp_globals_get(), MP_OBJ_NEW_QSTR(MP_QSTR___name__));
assert(this_name_q != MP_OBJ_NULL);
#if MICROPY_CPYTHON_COMPAT
if (MP_OBJ_QSTR_VALUE(this_name_q) == MP_QSTR___main__) {
// This is a module run by -m command-line switch, get its real name from backup attribute
this_name_q = mp_obj_dict_get(mp_globals_get(), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
}
#endif
mp_map_t *globals_map = mp_obj_dict_get_map(mp_globals_get());
mp_map_elem_t *elem = mp_map_lookup(globals_map, MP_OBJ_NEW_QSTR(MP_QSTR___path__), MP_MAP_LOOKUP);
bool is_pkg = (elem != NULL);
#if DEBUG_PRINT
DEBUG_printf("Current module/package: ");
mp_obj_print(this_name_q, PRINT_REPR);
DEBUG_printf(", is_package: %d", is_pkg);
DEBUG_printf("\n");
#endif
mp_uint_t this_name_l;
const char *this_name = mp_obj_str_get_data(this_name_q, &this_name_l);
const char *p = this_name + this_name_l;
if (!is_pkg) {
// We have module, but relative imports are anchored at package, so
// go there.
chop_component(this_name, &p);
}
uint dots_seen = 0;
while (level--) {
chop_component(this_name, &p);
dots_seen++;
}
if (dots_seen == 0 && level >= 1) {
// http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name
// "If the module's name does not contain any package information
// (e.g. it is set to '__main__') then relative imports are
// resolved as if the module were a top level module, regardless
// of where the module is actually located on the file system."
// Supposedly this if catches this condition and resolve it properly
// TODO: But nobody knows for sure. This condition happens when
// package's __init__.py does something like "import .submod". So,
// maybe we should check for package here? But quote above doesn't
// talk about packages, it talks about dot-less module names.
DEBUG_printf("Warning: no dots in current module name and level>0\n");
p = this_name + this_name_l;
} else if (level != -1) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "Invalid relative import"));
}
uint new_mod_l = (mod_len == 0 ? (size_t)(p - this_name) : (size_t)(p - this_name) + 1 + mod_len);
char *new_mod = alloca(new_mod_l);
memcpy(new_mod, this_name, p - this_name);
if (mod_len != 0) {
new_mod[p - this_name] = '.';
memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len);
}
qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l);
DEBUG_printf("Resolved base name for relative import: '%s'\n", qstr_str(new_mod_q));
if (new_mod_q == MP_QSTR_) {
// CPython raises SystemError
nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "cannot perform relative import"));
}
module_name = MP_OBJ_NEW_QSTR(new_mod_q);
mod_str = new_mod;
mod_len = new_mod_l;
}
// check if module already exists
qstr module_name_qstr = mp_obj_str_get_qstr(module_name);
mp_obj_t module_obj = mp_module_get(module_name_qstr);
if (module_obj != MP_OBJ_NULL) {
DEBUG_printf("Module already loaded\n");
// If it's not a package, return module right away
char *p = strchr(mod_str, '.');
if (p == NULL) {
return module_obj;
}
// If fromlist is not empty, return leaf module
if (fromtuple != mp_const_none) {
return module_obj;
}
// Otherwise, we need to return top-level package
qstr pkg_name = qstr_from_strn(mod_str, p - mod_str);
return mp_module_get(pkg_name);
}
DEBUG_printf("Module not yet loaded\n");
#if MICROPY_MODULE_FROZEN
mp_lexer_t *lex = mp_find_frozen_module(mod_str, mod_len);
if (lex != NULL) {
module_obj = mp_obj_new_module(module_name_qstr);
// if args[3] (fromtuple) has magic value False, set up
// this module for command-line "-m" option (set module's
// name to __main__ instead of real name).
// TODO: Duplicated below too.
if (fromtuple == mp_const_false) {
mp_obj_module_t *o = module_obj;
mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
}
do_load_from_lexer(module_obj, lex, mod_str);
return module_obj;
}
#endif
uint last = 0;
VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX)
module_obj = MP_OBJ_NULL;
mp_obj_t top_module_obj = MP_OBJ_NULL;
mp_obj_t outer_module_obj = MP_OBJ_NULL;
uint i;
for (i = 1; i <= mod_len; i++) {
if (i == mod_len || mod_str[i] == '.') {
// create a qstr for the module name up to this depth
qstr mod_name = qstr_from_strn(mod_str, i);
DEBUG_printf("Processing module: %s\n", qstr_str(mod_name));
DEBUG_printf("Previous path: =%.*s=\n", vstr_len(&path), vstr_str(&path));
// find the file corresponding to the module name
mp_import_stat_t stat;
if (vstr_len(&path) == 0) {
// first module in the dotted-name; search for a directory or file
stat = find_file(mod_str, i, &path);
} else {
// latter module in the dotted-name; append to path
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_strn(&path, mod_str + last, i - last);
stat = stat_dir_or_file(&path);
}
DEBUG_printf("Current path: %.*s\n", vstr_len(&path), vstr_str(&path));
if (stat == MP_IMPORT_STAT_NO_EXIST) {
#if MICROPY_MODULE_WEAK_LINKS
// check if there is a weak link to this module
if (i == mod_len) {
mp_map_elem_t *el = mp_map_lookup((mp_map_t*)&mp_builtin_module_weak_links_map, MP_OBJ_NEW_QSTR(mod_name), MP_MAP_LOOKUP);
if (el == NULL) {
goto no_exist;
}
// found weak linked module
module_obj = el->value;
} else {
no_exist:
#else
{
#endif
// couldn't find the file, so fail
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "module not found"));
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError,
"no module named '%q'", mod_name));
}
}
} else {
// found the file, so get the module
module_obj = mp_module_get(mod_name);
}
if (module_obj == MP_OBJ_NULL) {
// module not already loaded, so load it!
module_obj = mp_obj_new_module(mod_name);
// if args[3] (fromtuple) has magic value False, set up
// this module for command-line "-m" option (set module's
// name to __main__ instead of real name).
if (i == mod_len && fromtuple == mp_const_false) {
mp_obj_module_t *o = module_obj;
mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
#if MICROPY_CPYTHON_COMPAT
// Store real name in "__main__" attribute. Choosen semi-randonly, to reuse existing qstr's.
mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___main__), MP_OBJ_NEW_QSTR(mod_name));
#endif
}
if (stat == MP_IMPORT_STAT_DIR) {
DEBUG_printf("%.*s is dir\n", vstr_len(&path), vstr_str(&path));
// https://docs.python.org/3/reference/import.html
// "Specifically, any module that contains a __path__ attribute is considered a package."
mp_store_attr(module_obj, MP_QSTR___path__, mp_obj_new_str(vstr_str(&path), vstr_len(&path), false));
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_str(&path, "__init__.py");
if (mp_import_stat(vstr_null_terminated_str(&path)) != MP_IMPORT_STAT_FILE) {
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
mp_warning("%s is imported as namespace package", vstr_str(&path));
} else {
do_load(module_obj, &path);
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
}
} else { // MP_IMPORT_STAT_FILE
do_load(module_obj, &path);
// TODO: We cannot just break here, at the very least, we must execute
// trailer code below. But otherwise if there're remaining components,
// that would be (??) object path within module, not modules path within FS.
// break;
}
}
if (outer_module_obj != MP_OBJ_NULL) {
qstr s = qstr_from_strn(mod_str + last, i - last);
mp_store_attr(outer_module_obj, s, module_obj);
}
outer_module_obj = module_obj;
if (top_module_obj == MP_OBJ_NULL) {
top_module_obj = module_obj;
}
last = i + 1;
}
}
int pyexec_friendly_repl_process_char(int c) {
int ret = readline_process_char(c);
if (!repl.cont_line) {
if (ret == CHAR_CTRL_A) {
// change to raw REPL
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&repl.line);
return PYEXEC_SWITCH_MODE;
} else if (ret == CHAR_CTRL_B) {
// reset friendly REPL
mp_hal_stdout_tx_str("\r\n");
goto friendly_repl_reset;
} else if (ret == CHAR_CTRL_C) {
// break
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&repl.line);
return PYEXEC_FORCED_EXIT;
} else if (vstr_len(&repl.line) == 0) {
//goto input_restart;
}
if (ret < 0) {
return 0;
}
if (!mp_repl_continue_with_input(vstr_null_terminated_str(&repl.line))) {
goto exec;
}
vstr_add_byte(&repl.line, '\n');
repl.cont_line = true;
mp_hal_stdout_tx_str("... ");
readline_note_newline();
return 0;
} else {
if (ret == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
repl.cont_line = false;
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
goto exec;
}
if (ret < 0) {
return 0;
}
if (mp_repl_continue_with_input(vstr_null_terminated_str(&repl.line))) {
vstr_add_byte(&repl.line, '\n');
mp_hal_stdout_tx_str("... ");
readline_note_newline();
return 0;
}
exec: ;
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&repl.line), vstr_len(&repl.line), 0);
if (lex == NULL) {
printf("MemoryError\n");
} else {
int ret = parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, EXEC_FLAG_ALLOW_DEBUGGING | EXEC_FLAG_IS_REPL);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
friendly_repl_reset: // TODO
input_restart:
pyexec_friendly_repl_reset();
mp_hal_stdout_tx_str(">>> ");
return 0;
}
}
int pyexec_friendly_repl(void) {
vstr_t line;
vstr_init(&line, 32);
#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
// in host mode, we enable the LCD for the repl
mp_obj_t lcd_o = mp_call_function_0(mp_load_name(qstr_from_str("LCD")));
mp_call_function_1(mp_load_attr(lcd_o, qstr_from_str("light")), mp_const_true);
#endif
friendly_repl_reset:
mp_hal_stdout_tx_str("Micro Python " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; " MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME "\r\n");
mp_hal_stdout_tx_str("Type \"help()\" for more information.\r\n");
// to test ctrl-C
/*
{
uint32_t x[4] = {0x424242, 0xdeaddead, 0x242424, 0xdeadbeef};
for (;;) {
nlr_buf_t nlr;
printf("pyexec_repl: %p\n", x);
mp_hal_set_interrupt_char(CHAR_CTRL_C);
if (nlr_push(&nlr) == 0) {
for (;;) {
}
} else {
printf("break\n");
}
}
}
*/
for (;;) {
input_restart:
vstr_reset(&line);
int ret = readline(&line, ">>> ");
if (ret == CHAR_CTRL_A) {
// change to raw REPL
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&line);
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
return 0;
} else if (ret == CHAR_CTRL_B) {
// reset friendly REPL
mp_hal_stdout_tx_str("\r\n");
goto friendly_repl_reset;
} else if (ret == CHAR_CTRL_C) {
// break
mp_hal_stdout_tx_str("\r\n");
continue;
} else if (ret == CHAR_CTRL_D) {
// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&line);
return PYEXEC_FORCED_EXIT;
} else if (vstr_len(&line) == 0) {
continue;
}
while (mp_repl_continue_with_input(vstr_null_terminated_str(&line))) {
vstr_add_byte(&line, '\n');
ret = readline(&line, "... ");
if (ret == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
break;
}
}
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
if (lex == NULL) {
printf("MemoryError\n");
} else {
ret = parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, EXEC_FLAG_ALLOW_DEBUGGING | EXEC_FLAG_IS_REPL);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
}
}
int pyexec_friendly_repl(void) {
vstr_t line;
vstr_init(&line, 32);
#if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
// in host mode, we enable the LCD for the repl
mp_obj_t lcd_o = mp_call_function_0(mp_load_name(qstr_from_str("LCD")));
mp_call_function_1(mp_load_attr(lcd_o, qstr_from_str("light")), mp_const_true);
#endif
friendly_repl_reset:
mp_hal_stdout_tx_str("MicroPython " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; " MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME "\r\n");
mp_hal_stdout_tx_str("Type \"help()\" for more information.\r\n");
// to test ctrl-C
/*
{
uint32_t x[4] = {0x424242, 0xdeaddead, 0x242424, 0xdeadbeef};
for (;;) {
nlr_buf_t nlr;
printf("pyexec_repl: %p\n", x);
mp_hal_set_interrupt_char(CHAR_CTRL_C);
if (nlr_push(&nlr) == 0) {
for (;;) {
}
} else {
printf("break\n");
}
}
}
*/
for (;;) {
input_restart:
#if defined(USE_DEVICE_MODE)
if (usb_vcp_is_enabled()) {
// If the user gets to here and interrupts are disabled then
// they'll never see the prompt, traceback etc. The USB REPL needs
// interrupts to be enabled or no transfers occur. So we try to
// do the user a favor and reenable interrupts.
if (query_irq() == IRQ_STATE_DISABLED) {
enable_irq(IRQ_STATE_ENABLED);
mp_hal_stdout_tx_str("PYB: enabling IRQs\r\n");
}
}
#endif
vstr_reset(&line);
int ret = readline(&line, ">>> ");
mp_parse_input_kind_t parse_input_kind = MP_PARSE_SINGLE_INPUT;
if (ret == CHAR_CTRL_A) {
// change to raw REPL
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&line);
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
return 0;
} else if (ret == CHAR_CTRL_B) {
// reset friendly REPL
mp_hal_stdout_tx_str("\r\n");
goto friendly_repl_reset;
} else if (ret == CHAR_CTRL_C) {
// break
mp_hal_stdout_tx_str("\r\n");
continue;
} else if (ret == CHAR_CTRL_D) {
// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&line);
return PYEXEC_FORCED_EXIT;
} else if (ret == CHAR_CTRL_E) {
// paste mode
mp_hal_stdout_tx_str("\r\npaste mode; Ctrl-C to cancel, Ctrl-D to finish\r\n=== ");
vstr_reset(&line);
for (;;) {
char c = mp_hal_stdin_rx_chr();
if (c == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (c == CHAR_CTRL_D) {
// end of input
mp_hal_stdout_tx_str("\r\n");
break;
} else {
// add char to buffer and echo
vstr_add_byte(&line, c);
if (c == '\r') {
mp_hal_stdout_tx_str("\r\n=== ");
} else {
mp_hal_stdout_tx_strn(&c, 1);
}
}
}
parse_input_kind = MP_PARSE_FILE_INPUT;
} else if (vstr_len(&line) == 0) {
continue;
} else {
// got a line with non-zero length, see if it needs continuing
while (mp_repl_continue_with_input(vstr_null_terminated_str(&line))) {
vstr_add_byte(&line, '\n');
ret = readline(&line, "... ");
if (ret == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
break;
}
}
}
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
if (lex == NULL) {
printf("MemoryError\n");
} else {
ret = parse_compile_execute(lex, parse_input_kind, EXEC_FLAG_ALLOW_DEBUGGING | EXEC_FLAG_IS_REPL);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
}
}
STATIC void mp_lexer_next_token_into(mp_lexer_t *lex, mp_token_t *tok, bool first_token) {
// skip white space and comments
bool had_physical_newline = false;
while (!is_end(lex)) {
if (is_physical_newline(lex)) {
had_physical_newline = true;
next_char(lex);
} else if (is_whitespace(lex)) {
next_char(lex);
} else if (is_char(lex, '#')) {
next_char(lex);
while (!is_end(lex) && !is_physical_newline(lex)) {
next_char(lex);
}
// had_physical_newline will be set on next loop
} else if (is_char(lex, '\\')) {
// backslash (outside string literals) must appear just before a physical newline
next_char(lex);
if (!is_physical_newline(lex)) {
// SyntaxError: unexpected character after line continuation character
tok->src_line = lex->line;
tok->src_column = lex->column;
tok->kind = MP_TOKEN_BAD_LINE_CONTINUATION;
vstr_reset(&lex->vstr);
tok->str = vstr_str(&lex->vstr);
tok->len = 0;
return;
} else {
next_char(lex);
}
} else {
break;
}
}
// set token source information
tok->src_line = lex->line;
tok->src_column = lex->column;
// start new token text
vstr_reset(&lex->vstr);
if (first_token && lex->line == 1 && lex->column != 1) {
// check that the first token is in the first column
// if first token is not on first line, we get a physical newline and
// this check is done as part of normal indent/dedent checking below
// (done to get equivalence with CPython)
tok->kind = MP_TOKEN_INDENT;
} else if (lex->emit_dent < 0) {
tok->kind = MP_TOKEN_DEDENT;
lex->emit_dent += 1;
} else if (lex->emit_dent > 0) {
tok->kind = MP_TOKEN_INDENT;
lex->emit_dent -= 1;
} else if (had_physical_newline && lex->nested_bracket_level == 0) {
tok->kind = MP_TOKEN_NEWLINE;
uint num_spaces = lex->column - 1;
lex->emit_dent = 0;
if (num_spaces == indent_top(lex)) {
} else if (num_spaces > indent_top(lex)) {
indent_push(lex, num_spaces);
lex->emit_dent += 1;
} else {
while (num_spaces < indent_top(lex)) {
indent_pop(lex);
lex->emit_dent -= 1;
}
if (num_spaces != indent_top(lex)) {
tok->kind = MP_TOKEN_DEDENT_MISMATCH;
}
}
} else if (is_end(lex)) {
if (indent_top(lex) > 0) {
tok->kind = MP_TOKEN_NEWLINE;
lex->emit_dent = 0;
while (indent_top(lex) > 0) {
indent_pop(lex);
lex->emit_dent -= 1;
}
} else {
tok->kind = MP_TOKEN_END;
}
} else if (is_char_or(lex, '\'', '\"')
|| (is_char_or3(lex, 'r', 'u', 'b') && is_char_following_or(lex, '\'', '\"'))
|| ((is_char_and(lex, 'r', 'b') || is_char_and(lex, 'b', 'r')) && is_char_following_following_or(lex, '\'', '\"'))) {
// a string or bytes literal
// parse type codes
bool is_raw = false;
bool is_bytes = false;
if (is_char(lex, 'u')) {
next_char(lex);
} else if (is_char(lex, 'b')) {
is_bytes = true;
next_char(lex);
if (is_char(lex, 'r')) {
is_raw = true;
next_char(lex);
}
} else if (is_char(lex, 'r')) {
is_raw = true;
next_char(lex);
if (is_char(lex, 'b')) {
is_bytes = true;
next_char(lex);
}
}
// set token kind
if (is_bytes) {
tok->kind = MP_TOKEN_BYTES;
} else {
tok->kind = MP_TOKEN_STRING;
}
// get first quoting character
char quote_char = '\'';
if (is_char(lex, '\"')) {
quote_char = '\"';
}
next_char(lex);
// work out if it's a single or triple quoted literal
int num_quotes;
if (is_char_and(lex, quote_char, quote_char)) {
// triple quotes
next_char(lex);
next_char(lex);
num_quotes = 3;
} else {
// single quotes
num_quotes = 1;
}
// parse the literal
int n_closing = 0;
while (!is_end(lex) && (num_quotes > 1 || !is_char(lex, '\n')) && n_closing < num_quotes) {
if (is_char(lex, quote_char)) {
n_closing += 1;
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
} else {
n_closing = 0;
if (is_char(lex, '\\')) {
next_char(lex);
unichar c = CUR_CHAR(lex);
if (is_raw) {
// raw strings allow escaping of quotes, but the backslash is also emitted
vstr_add_char(&lex->vstr, '\\');
} else {
switch (c) {
case MP_LEXER_CHAR_EOF: break; // TODO a proper error message?
case '\n': c = MP_LEXER_CHAR_EOF; break; // TODO check this works correctly (we are supposed to ignore it
case '\\': break;
case '\'': break;
case '"': break;
case 'a': c = 0x07; break;
case 'b': c = 0x08; break;
case 't': c = 0x09; break;
case 'n': c = 0x0a; break;
case 'v': c = 0x0b; break;
case 'f': c = 0x0c; break;
case 'r': c = 0x0d; break;
case 'u':
case 'U':
if (is_bytes) {
// b'\u1234' == b'\\u1234'
vstr_add_char(&lex->vstr, '\\');
break;
}
// Otherwise fall through.
case 'x':
{
uint num = 0;
if (!get_hex(lex, (c == 'x' ? 2 : c == 'u' ? 4 : 8), &num)) {
// TODO error message
assert(0);
}
c = num;
break;
}
case 'N':
// Supporting '\N{LATIN SMALL LETTER A}' == 'a' would require keeping the
// entire Unicode name table in the core. As of Unicode 6.3.0, that's nearly
// 3MB of text; even gzip-compressed and with minimal structure, it'll take
// roughly half a meg of storage. This form of Unicode escape may be added
// later on, but it's definitely not a priority right now. -- CJA 20140607
assert(!"Unicode name escapes not supported");
break;
default:
if (c >= '0' && c <= '7') {
// Octal sequence, 1-3 chars
int digits = 3;
int num = c - '0';
while (is_following_odigit(lex) && --digits != 0) {
next_char(lex);
num = num * 8 + (CUR_CHAR(lex) - '0');
}
c = num;
} else {
// unrecognised escape character; CPython lets this through verbatim as '\' and then the character
vstr_add_char(&lex->vstr, '\\');
}
break;
}
}
if (c != MP_LEXER_CHAR_EOF) {
if (c < 0x110000 && !is_bytes) {
vstr_add_char(&lex->vstr, c);
} else if (c < 0x100 && is_bytes) {
vstr_add_byte(&lex->vstr, c);
} else {
assert(!"TODO: Throw an error, invalid escape code probably");
}
}
} else {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
}
}
next_char(lex);
}
// check we got the required end quotes
if (n_closing < num_quotes) {
tok->kind = MP_TOKEN_LONELY_STRING_OPEN;
}
// cut off the end quotes from the token text
vstr_cut_tail_bytes(&lex->vstr, n_closing);
} else if (is_head_of_identifier(lex)) {
tok->kind = MP_TOKEN_NAME;
// get first char
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
// get tail chars
while (!is_end(lex) && is_tail_of_identifier(lex)) {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
}
} else if (is_digit(lex) || (is_char(lex, '.') && is_following_digit(lex))) {
tok->kind = MP_TOKEN_NUMBER;
// get first char
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
// get tail chars
while (!is_end(lex)) {
if (is_char_or(lex, 'e', 'E')) {
vstr_add_char(&lex->vstr, 'e');
next_char(lex);
if (is_char(lex, '+') || is_char(lex, '-')) {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
}
} else if (is_letter(lex) || is_digit(lex) || is_char_or(lex, '_', '.')) {
vstr_add_char(&lex->vstr, CUR_CHAR(lex));
next_char(lex);
} else {
break;
}
}
} else if (is_char(lex, '.')) {
// special handling for . and ... operators, because .. is not a valid operator
// get first char
vstr_add_char(&lex->vstr, '.');
next_char(lex);
if (is_char_and(lex, '.', '.')) {
vstr_add_char(&lex->vstr, '.');
vstr_add_char(&lex->vstr, '.');
next_char(lex);
next_char(lex);
tok->kind = MP_TOKEN_ELLIPSIS;
} else {
tok->kind = MP_TOKEN_DEL_PERIOD;
}
} else {
// search for encoded delimiter or operator
const char *t = tok_enc;
uint tok_enc_index = 0;
for (; *t != 0 && !is_char(lex, *t); t += 1) {
if (*t == 'e' || *t == 'c') {
t += 1;
} else if (*t == 'E') {
tok_enc_index -= 1;
t += 1;
}
tok_enc_index += 1;
}
next_char(lex);
if (*t == 0) {
// didn't match any delimiter or operator characters
tok->kind = MP_TOKEN_INVALID;
} else {
// matched a delimiter or operator character
// get the maximum characters for a valid token
t += 1;
uint t_index = tok_enc_index;
for (;;) {
for (; *t == 'e'; t += 1) {
t += 1;
t_index += 1;
if (is_char(lex, *t)) {
next_char(lex);
tok_enc_index = t_index;
break;
}
}
if (*t == 'E') {
t += 1;
if (is_char(lex, *t)) {
next_char(lex);
tok_enc_index = t_index;
} else {
tok->kind = MP_TOKEN_INVALID;
goto tok_enc_no_match;
}
break;
}
if (*t == 'c') {
t += 1;
t_index += 1;
if (is_char(lex, *t)) {
next_char(lex);
tok_enc_index = t_index;
t += 1;
} else {
break;
}
} else {
break;
}
}
// set token kind
tok->kind = tok_enc_kind[tok_enc_index];
tok_enc_no_match:
// compute bracket level for implicit line joining
if (tok->kind == MP_TOKEN_DEL_PAREN_OPEN || tok->kind == MP_TOKEN_DEL_BRACKET_OPEN || tok->kind == MP_TOKEN_DEL_BRACE_OPEN) {
lex->nested_bracket_level += 1;
} else if (tok->kind == MP_TOKEN_DEL_PAREN_CLOSE || tok->kind == MP_TOKEN_DEL_BRACKET_CLOSE || tok->kind == MP_TOKEN_DEL_BRACE_CLOSE) {
lex->nested_bracket_level -= 1;
}
}
}
// point token text to vstr buffer
tok->str = vstr_str(&lex->vstr);
tok->len = vstr_len(&lex->vstr);
// check for keywords
if (tok->kind == MP_TOKEN_NAME) {
// We check for __debug__ here and convert it to its value. This is so
// the parser gives a syntax error on, eg, x.__debug__. Otherwise, we
// need to check for this special token in many places in the compiler.
// TODO improve speed of these string comparisons
//for (int i = 0; tok_kw[i] != NULL; i++) {
for (int i = 0; i < MP_ARRAY_SIZE(tok_kw); i++) {
if (str_strn_equal(tok_kw[i], tok->str, tok->len)) {
if (i == MP_ARRAY_SIZE(tok_kw) - 1) {
// tok_kw[MP_ARRAY_SIZE(tok_kw) - 1] == "__debug__"
tok->kind = (mp_optimise_value == 0 ? MP_TOKEN_KW_TRUE : MP_TOKEN_KW_FALSE);
} else {
tok->kind = MP_TOKEN_KW_FALSE + i;
}
break;
}
}
}
}
int main(void) {
// TODO disable JTAG
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
// set the system clock to be HSE
SystemClock_Config();
// enable GPIO clocks
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOC_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
// enable the CCM RAM
__CCMDATARAMEN_CLK_ENABLE();
#if 0
#if defined(NETDUINO_PLUS_2)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
#if MICROPY_HW_HAS_SDCARD
// Turn on the power enable for the sdcard (PB1)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_WriteBit(GPIOB, GPIO_Pin_1, Bit_SET);
#endif
// Turn on the power for the 5V on the expansion header (PB2)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_WriteBit(GPIOB, GPIO_Pin_2, Bit_SET);
}
#endif
#endif
// basic sub-system init
pendsv_init();
timer_tim3_init();
led_init();
switch_init0();
int first_soft_reset = true;
soft_reset:
// check if user switch held to select the reset mode
led_state(1, 0);
led_state(2, 1);
led_state(3, 0);
led_state(4, 0);
uint reset_mode = 1;
#if MICROPY_HW_HAS_SWITCH
if (switch_get()) {
for (uint i = 0; i < 3000; i++) {
if (!switch_get()) {
break;
}
HAL_Delay(20);
if (i % 30 == 29) {
if (++reset_mode > 3) {
reset_mode = 1;
}
led_state(2, reset_mode & 1);
led_state(3, reset_mode & 2);
led_state(4, reset_mode & 4);
}
}
// flash the selected reset mode
for (uint i = 0; i < 6; i++) {
led_state(2, 0);
led_state(3, 0);
led_state(4, 0);
HAL_Delay(50);
led_state(2, reset_mode & 1);
led_state(3, reset_mode & 2);
led_state(4, reset_mode & 4);
HAL_Delay(50);
}
HAL_Delay(400);
}
#endif
#if MICROPY_HW_ENABLE_RTC
if (first_soft_reset) {
rtc_init();
}
#endif
// more sub-system init
#if MICROPY_HW_HAS_SDCARD
if (first_soft_reset) {
sdcard_init();
}
#endif
if (first_soft_reset) {
storage_init();
}
// GC init
gc_init(&_heap_start, &_heap_end);
// Change #if 0 to #if 1 if you want REPL on USART_6 (or another usart)
// as well as on USB VCP
#if 0
pyb_usart_global_debug = pyb_Usart(MP_OBJ_NEW_SMALL_INT(PYB_USART_YA),
MP_OBJ_NEW_SMALL_INT(115200));
#else
pyb_usart_global_debug = NULL;
#endif
// Micro Python init
qstr_init();
mp_init();
mp_obj_list_init(mp_sys_path, 0);
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_));
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_lib));
mp_obj_list_init(mp_sys_argv, 0);
readline_init();
exti_init();
#if MICROPY_HW_HAS_SWITCH
// must come after exti_init
switch_init();
#endif
#if MICROPY_HW_HAS_LCD
// LCD init (just creates class, init hardware by calling LCD())
lcd_init();
#endif
pin_map_init();
// local filesystem init
{
// try to mount the flash
FRESULT res = f_mount(&fatfs0, "0:", 1);
if (reset_mode == 3 || res == FR_NO_FILESYSTEM) {
// no filesystem, or asked to reset it, so create a fresh one
// LED on to indicate creation of LFS
led_state(PYB_LED_R2, 1);
uint32_t start_tick = HAL_GetTick();
res = f_mkfs("0:", 0, 0);
if (res == FR_OK) {
// success creating fresh LFS
} else {
__fatal_error("could not create LFS");
}
// create empty main.py
FIL fp;
f_open(&fp, "0:/main.py", FA_WRITE | FA_CREATE_ALWAYS);
UINT n;
f_write(&fp, fresh_main_py, sizeof(fresh_main_py) - 1 /* don't count null terminator */, &n);
// TODO check we could write n bytes
f_close(&fp);
// create .inf driver file
f_open(&fp, "0:/pybcdc.inf", FA_WRITE | FA_CREATE_ALWAYS);
f_write(&fp, fresh_pybcdc_inf, sizeof(fresh_pybcdc_inf) - 1 /* don't count null terminator */, &n);
f_close(&fp);
// keep LED on for at least 200ms
sys_tick_wait_at_least(start_tick, 200);
led_state(PYB_LED_R2, 0);
} else if (res == FR_OK) {
// mount sucessful
} else {
__fatal_error("could not access LFS");
}
}
// make sure we have a 0:/boot.py
{
FILINFO fno;
#if _USE_LFN
fno.lfname = NULL;
fno.lfsize = 0;
#endif
FRESULT res = f_stat("0:/boot.py", &fno);
if (res == FR_OK) {
if (fno.fattrib & AM_DIR) {
// exists as a directory
// TODO handle this case
// see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation
} else {
// exists as a file, good!
}
} else {
// doesn't exist, create fresh file
// LED on to indicate creation of boot.py
led_state(PYB_LED_R2, 1);
uint32_t start_tick = HAL_GetTick();
FIL fp;
f_open(&fp, "0:/boot.py", FA_WRITE | FA_CREATE_ALWAYS);
UINT n;
f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n);
// TODO check we could write n bytes
f_close(&fp);
// keep LED on for at least 200ms
sys_tick_wait_at_least(start_tick, 200);
led_state(PYB_LED_R2, 0);
}
}
// root device defaults to internal flash filesystem
uint root_device = 0;
#if defined(USE_DEVICE_MODE)
usb_storage_medium_t usb_medium = USB_STORAGE_MEDIUM_FLASH;
#endif
#if MICROPY_HW_HAS_SDCARD
// if an SD card is present then mount it on 1:/
if (reset_mode == 1 && sdcard_is_present()) {
FRESULT res = f_mount(&fatfs1, "1:", 1);
if (res != FR_OK) {
printf("[SD] could not mount SD card\n");
} else {
// use SD card as root device
root_device = 1;
if (first_soft_reset) {
// use SD card as medium for the USB MSD
#if defined(USE_DEVICE_MODE)
usb_medium = USB_STORAGE_MEDIUM_SDCARD;
#endif
}
}
}
#else
// Get rid of compiler warning if no SDCARD is configured.
(void)first_soft_reset;
#endif
// run <root>:/boot.py, if it exists
if (reset_mode == 1) {
const char *boot_file;
if (root_device == 0) {
boot_file = "0:/boot.py";
} else {
boot_file = "1:/boot.py";
}
FRESULT res = f_stat(boot_file, NULL);
if (res == FR_OK) {
if (!pyexec_file(boot_file)) {
flash_error(4);
}
}
}
// turn boot-up LEDs off
led_state(2, 0);
led_state(3, 0);
led_state(4, 0);
#if defined(USE_HOST_MODE)
// USB host
pyb_usb_host_init();
#elif defined(USE_DEVICE_MODE)
// USB device
if (reset_mode == 1) {
usb_device_mode_t usb_mode = USB_DEVICE_MODE_CDC_MSC;
if (pyb_config_usb_mode != MP_OBJ_NULL) {
if (strcmp(mp_obj_str_get_str(pyb_config_usb_mode), "CDC+HID") == 0) {
usb_mode = USB_DEVICE_MODE_CDC_HID;
}
}
pyb_usb_dev_init(usb_mode, usb_medium);
} else {
pyb_usb_dev_init(USB_DEVICE_MODE_CDC_MSC, usb_medium);
}
#endif
#if MICROPY_HW_ENABLE_RNG
// RNG
rng_init();
#endif
#if MICROPY_HW_ENABLE_TIMER
// timer
//timer_init();
#endif
// I2C
i2c_init();
#if MICROPY_HW_HAS_MMA7660
// MMA accel: init and reset
accel_init();
#endif
#if MICROPY_HW_ENABLE_SERVO
// servo
servo_init();
#endif
#if MICROPY_HW_ENABLE_DAC
// DAC
dac_init();
#endif
// now that everything is initialised, run main script
if (reset_mode == 1 && pyexec_mode_kind == PYEXEC_MODE_FRIENDLY_REPL) {
vstr_t *vstr = vstr_new();
vstr_printf(vstr, "%d:/", root_device);
if (pyb_config_main == MP_OBJ_NULL) {
vstr_add_str(vstr, "main.py");
} else {
vstr_add_str(vstr, mp_obj_str_get_str(pyb_config_main));
}
FRESULT res = f_stat(vstr_str(vstr), NULL);
if (res == FR_OK) {
if (!pyexec_file(vstr_str(vstr))) {
flash_error(3);
}
}
vstr_free(vstr);
}
#if 0
#if MICROPY_HW_HAS_WLAN
// wifi
pyb_wlan_init();
pyb_wlan_start();
#endif
#endif
// enter REPL
// REPL mode can change, or it can request a soft reset
for (;;) {
if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) {
if (pyexec_raw_repl() != 0) {
break;
}
} else {
if (pyexec_friendly_repl() != 0) {
break;
}
}
}
printf("PYB: sync filesystems\n");
storage_flush();
printf("PYB: soft reboot\n");
first_soft_reset = false;
goto soft_reset;
}
mp_obj_t mp_builtin___import__(uint n_args, mp_obj_t *args) {
#if DEBUG_PRINT
printf("__import__:\n");
for (int i = 0; i < n_args; i++) {
printf(" ");
mp_obj_print(args[i], PRINT_REPR);
printf("\n");
}
#endif
mp_obj_t module_name = args[0];
mp_obj_t fromtuple = mp_const_none;
int level = 0;
if (n_args >= 4) {
fromtuple = args[3];
if (n_args >= 5) {
level = MP_OBJ_SMALL_INT_VALUE(args[4]);
}
}
uint mod_len;
const char *mod_str = (const char*)mp_obj_str_get_data(module_name, &mod_len);
if (level != 0) {
// What we want to do here is to take name of current module,
// chop <level> trailing components, and concatenate with passed-in
// module name, thus resolving relative import name into absolue.
// This even appears to be correct per
// http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name
// "Relative imports use a module's __name__ attribute to determine that
// module's position in the package hierarchy."
mp_obj_t this_name_q = mp_obj_dict_get(mp_globals_get(), MP_OBJ_NEW_QSTR(MP_QSTR___name__));
assert(this_name_q != MP_OBJ_NULL);
#if DEBUG_PRINT
printf("Current module: ");
mp_obj_print(this_name_q, PRINT_REPR);
printf("\n");
#endif
uint this_name_l;
const char *this_name = (const char*)mp_obj_str_get_data(this_name_q, &this_name_l);
uint dots_seen = 0;
const char *p = this_name + this_name_l - 1;
while (p > this_name) {
if (*p == '.') {
dots_seen++;
if (--level == 0) {
break;
}
}
p--;
}
if (dots_seen == 0 && level == 1) {
// http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name
// "If the module's name does not contain any package information
// (e.g. it is set to '__main__') then relative imports are
// resolved as if the module were a top level module, regardless
// of where the module is actually located on the file system."
// Supposedly this if catches this condition and resolve it properly
// TODO: But nobody knows for sure. This condition happens when
// package's __init__.py does something like "import .submod". So,
// maybe we should check for package here? But quote above doesn't
// talk about packages, it talks about dot-less module names.
p = this_name + this_name_l;
} else if (level != 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ImportError, "Invalid relative import"));
}
uint new_mod_l = (mod_len == 0 ? p - this_name : p - this_name + 1 + mod_len);
char *new_mod = alloca(new_mod_l);
memcpy(new_mod, this_name, p - this_name);
if (mod_len != 0) {
new_mod[p - this_name] = '.';
memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len);
}
qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l);
DEBUG_printf("Resolved relative name: %s\n", qstr_str(new_mod_q));
module_name = MP_OBJ_NEW_QSTR(new_mod_q);
mod_str = new_mod;
mod_len = new_mod_l;
}
// check if module already exists
mp_obj_t module_obj = mp_module_get(mp_obj_str_get_qstr(module_name));
if (module_obj != MP_OBJ_NULL) {
DEBUG_printf("Module already loaded\n");
// If it's not a package, return module right away
char *p = strchr(mod_str, '.');
if (p == NULL) {
return module_obj;
}
// If fromlist is not empty, return leaf module
if (fromtuple != mp_const_none) {
return module_obj;
}
// Otherwise, we need to return top-level package
qstr pkg_name = qstr_from_strn(mod_str, p - mod_str);
return mp_module_get(pkg_name);
}
DEBUG_printf("Module not yet loaded\n");
uint last = 0;
VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX)
module_obj = MP_OBJ_NULL;
mp_obj_t top_module_obj = MP_OBJ_NULL;
mp_obj_t outer_module_obj = MP_OBJ_NULL;
uint i;
for (i = 1; i <= mod_len; i++) {
if (i == mod_len || mod_str[i] == '.') {
// create a qstr for the module name up to this depth
qstr mod_name = qstr_from_strn(mod_str, i);
DEBUG_printf("Processing module: %s\n", qstr_str(mod_name));
DEBUG_printf("Previous path: %s\n", vstr_str(&path));
// find the file corresponding to the module name
mp_import_stat_t stat;
if (vstr_len(&path) == 0) {
// first module in the dotted-name; search for a directory or file
stat = find_file(mod_str, i, &path);
} else {
// latter module in the dotted-name; append to path
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_strn(&path, mod_str + last, i - last);
stat = stat_dir_or_file(&path);
}
DEBUG_printf("Current path: %s\n", vstr_str(&path));
// fail if we couldn't find the file
if (stat == MP_IMPORT_STAT_NO_EXIST) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "No module named '%s'", qstr_str(mod_name)));
}
module_obj = mp_module_get(mod_name);
if (module_obj == MP_OBJ_NULL) {
// module not already loaded, so load it!
module_obj = mp_obj_new_module(mod_name);
if (stat == MP_IMPORT_STAT_DIR) {
DEBUG_printf("%s is dir\n", vstr_str(&path));
// https://docs.python.org/3/reference/import.html
// "Specifically, any module that contains a __path__ attribute is considered a package."
mp_store_attr(module_obj, MP_QSTR___path__, mp_obj_new_str(vstr_str(&path), vstr_len(&path), false));
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_str(&path, "__init__.py");
if (mp_import_stat(vstr_str(&path)) != MP_IMPORT_STAT_FILE) {
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
printf("Notice: %s is imported as namespace package\n", vstr_str(&path));
} else {
do_load(module_obj, &path);
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
}
} else { // MP_IMPORT_STAT_FILE
do_load(module_obj, &path);
// TODO: We cannot just break here, at the very least, we must execute
// trailer code below. But otherwise if there're remaining components,
// that would be (??) object path within module, not modules path within FS.
// break;
}
}
if (outer_module_obj != MP_OBJ_NULL) {
qstr s = qstr_from_strn(mod_str + last, i - last);
mp_store_attr(outer_module_obj, s, module_obj);
}
outer_module_obj = module_obj;
if (top_module_obj == MP_OBJ_NULL) {
top_module_obj = module_obj;
}
last = i + 1;
}
}
if (i < mod_len) {
// we loaded a package, now need to load objects from within that package
// TODO
assert(0);
}
// If fromlist is not empty, return leaf module
if (fromtuple != mp_const_none) {
return module_obj;
}
// Otherwise, we need to return top-level package
return top_module_obj;
}
int main(void) {
// TODO disable JTAG
// update the SystemCoreClock variable
SystemCoreClockUpdate();
// set interrupt priority config to use all 4 bits for pre-empting
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
// enable the CCM RAM and the GPIO's
RCC->AHB1ENR |= RCC_AHB1ENR_CCMDATARAMEN | RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN | RCC_AHB1ENR_GPIOCEN | RCC_AHB1ENR_GPIODEN;
#if MICROPY_HW_HAS_SDCARD
{
// configure SDIO pins to be high to start with (apparently makes it more robust)
// FIXME this is not making them high, it just makes them outputs...
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);
// Configure PD.02 CMD line
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
#endif
#if defined(NETDUINO_PLUS_2)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
#if MICROPY_HW_HAS_SDCARD
// Turn on the power enable for the sdcard (PB1)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_WriteBit(GPIOB, GPIO_Pin_1, Bit_SET);
#endif
// Turn on the power for the 5V on the expansion header (PB2)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_WriteBit(GPIOB, GPIO_Pin_2, Bit_SET);
}
#endif
// basic sub-system init
sys_tick_init();
pendsv_init();
led_init();
#if MICROPY_HW_ENABLE_RTC
rtc_init();
#endif
// turn on LED to indicate bootup
led_state(PYB_LED_G1, 1);
// more sub-system init
#if MICROPY_HW_HAS_SDCARD
sdcard_init();
#endif
storage_init();
// uncomment these 2 lines if you want REPL on USART_6 (or another usart) as well as on USB VCP
//pyb_usart_global_debug = PYB_USART_YA;
//usart_init(pyb_usart_global_debug, 115200);
int first_soft_reset = true;
soft_reset:
// GC init
gc_init(&_heap_start, &_heap_end);
// Micro Python init
qstr_init();
mp_init();
mp_obj_list_init(mp_sys_path, 0);
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_));
mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_0_colon__slash_lib));
mp_obj_list_init(mp_sys_argv, 0);
exti_init();
#if MICROPY_HW_HAS_SWITCH
switch_init();
#endif
#if MICROPY_HW_HAS_LCD
// LCD init (just creates class, init hardware by calling LCD())
lcd_init();
#endif
#if MICROPY_HW_ENABLE_SERVO
// servo
servo_init();
#endif
#if MICROPY_HW_ENABLE_TIMER
// timer
timer_init();
#endif
#if MICROPY_HW_ENABLE_RNG
// RNG
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE);
RNG_Cmd(ENABLE);
#endif
pin_map_init();
// add some functions to the builtin Python namespace
mp_store_name(MP_QSTR_help, mp_make_function_n(0, pyb_help));
mp_store_name(MP_QSTR_open, mp_make_function_n(2, pyb_io_open));
// load the pyb module
mp_module_register(MP_QSTR_pyb, (mp_obj_t)&pyb_module);
// check if user switch held (initiates reset of filesystem)
bool reset_filesystem = false;
#if MICROPY_HW_HAS_SWITCH
if (switch_get()) {
reset_filesystem = true;
for (int i = 0; i < 50; i++) {
if (!switch_get()) {
reset_filesystem = false;
break;
}
sys_tick_delay_ms(10);
}
}
#endif
// local filesystem init
{
// try to mount the flash
FRESULT res = f_mount(&fatfs0, "0:", 1);
if (!reset_filesystem && res == FR_OK) {
// mount sucessful
} else if (reset_filesystem || res == FR_NO_FILESYSTEM) {
// no filesystem, so create a fresh one
// TODO doesn't seem to work correctly when reset_filesystem is true...
// LED on to indicate creation of LFS
led_state(PYB_LED_R2, 1);
uint32_t stc = sys_tick_counter;
res = f_mkfs("0:", 0, 0);
if (res == FR_OK) {
// success creating fresh LFS
} else {
__fatal_error("could not create LFS");
}
// create src directory
res = f_mkdir("0:/src");
// ignore result from mkdir
// create empty main.py
FIL fp;
f_open(&fp, "0:/src/main.py", FA_WRITE | FA_CREATE_ALWAYS);
UINT n;
f_write(&fp, fresh_main_py, sizeof(fresh_main_py) - 1 /* don't count null terminator */, &n);
// TODO check we could write n bytes
f_close(&fp);
// keep LED on for at least 200ms
sys_tick_wait_at_least(stc, 200);
led_state(PYB_LED_R2, 0);
} else {
__fatal_error("could not access LFS");
}
}
// make sure we have a /boot.py
{
FILINFO fno;
FRESULT res = f_stat("0:/boot.py", &fno);
if (res == FR_OK) {
if (fno.fattrib & AM_DIR) {
// exists as a directory
// TODO handle this case
// see http://elm-chan.org/fsw/ff/img/app2.c for a "rm -rf" implementation
} else {
// exists as a file, good!
}
} else {
// doesn't exist, create fresh file
// LED on to indicate creation of boot.py
led_state(PYB_LED_R2, 1);
uint32_t stc = sys_tick_counter;
FIL fp;
f_open(&fp, "0:/boot.py", FA_WRITE | FA_CREATE_ALWAYS);
UINT n;
f_write(&fp, fresh_boot_py, sizeof(fresh_boot_py) - 1 /* don't count null terminator */, &n);
// TODO check we could write n bytes
f_close(&fp);
// keep LED on for at least 200ms
sys_tick_wait_at_least(stc, 200);
led_state(PYB_LED_R2, 0);
}
}
// run /boot.py
if (!pyexec_file("0:/boot.py")) {
flash_error(4);
}
if (first_soft_reset) {
#if MICROPY_HW_HAS_MMA7660
// MMA accel: init and reset address to zero
accel_init();
#endif
}
// turn boot-up LED off
led_state(PYB_LED_G1, 0);
#if MICROPY_HW_HAS_SDCARD
// if an SD card is present then mount it on 1:/
if (sdcard_is_present()) {
FRESULT res = f_mount(&fatfs1, "1:", 1);
if (res != FR_OK) {
printf("[SD] could not mount SD card\n");
} else {
if (first_soft_reset) {
// use SD card as medium for the USB MSD
usbd_storage_select_medium(USBD_STORAGE_MEDIUM_SDCARD);
}
}
}
#endif
#ifdef USE_HOST_MODE
// USB host
pyb_usb_host_init();
#elif defined(USE_DEVICE_MODE)
// USB device
pyb_usb_dev_init(PYB_USB_DEV_VCP_MSC);
#endif
// run main script
{
vstr_t *vstr = vstr_new();
vstr_add_str(vstr, "0:/");
if (pyb_config_source_dir == MP_OBJ_NULL) {
vstr_add_str(vstr, "src");
} else {
vstr_add_str(vstr, mp_obj_str_get_str(pyb_config_source_dir));
}
vstr_add_char(vstr, '/');
if (pyb_config_main == MP_OBJ_NULL) {
vstr_add_str(vstr, "main.py");
} else {
vstr_add_str(vstr, mp_obj_str_get_str(pyb_config_main));
}
if (!pyexec_file(vstr_str(vstr))) {
flash_error(3);
}
vstr_free(vstr);
}
#if MICROPY_HW_HAS_MMA7660
// HID example
if (0) {
uint8_t data[4];
data[0] = 0;
data[1] = 1;
data[2] = -2;
data[3] = 0;
for (;;) {
#if MICROPY_HW_HAS_SWITCH
if (switch_get()) {
data[0] = 0x01; // 0x04 is middle, 0x02 is right
} else {
data[0] = 0x00;
}
#else
data[0] = 0x00;
#endif
accel_start(0x4c /* ACCEL_ADDR */, 1);
accel_send_byte(0);
accel_restart(0x4c /* ACCEL_ADDR */, 0);
for (int i = 0; i <= 1; i++) {
int v = accel_read_ack() & 0x3f;
if (v & 0x20) {
v |= ~0x1f;
}
data[1 + i] = v;
}
accel_read_nack();
usb_hid_send_report(data);
sys_tick_delay_ms(15);
}
}
#endif
#if MICROPY_HW_HAS_WLAN
// wifi
pyb_wlan_init();
pyb_wlan_start();
#endif
pyexec_repl();
printf("PYB: sync filesystems\n");
storage_flush();
printf("PYB: soft reboot\n");
first_soft_reset = false;
goto soft_reset;
}
int main(void)
{
// Stack limit should be less than real stack size, so we
// had chance to recover from limit hit.
mp_stack_set_limit((char*)&_ram_end - (char*)&_heap_end - 1024);
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
// basic sub-system init
pendsv_init();
timer_tim3_init();
led_init();
soft_reset:
// check if user switch held to select the reset mode
led_state(LED_RED, 1);
led_state(LED_GREEN, 1);
led_state(LED_BLUE, 1);
#if MICROPY_HW_ENABLE_RTC
rtc_init();
#endif
// GC init
gc_init(&_heap_start, &_heap_end);
// Micro Python init
mp_init();
mp_obj_list_init(mp_sys_path, 0);
mp_obj_list_init(mp_sys_argv, 0);
readline_init0();
pin_init0();
extint_init0();
timer_init0();
rng_init0();
i2c_init0();
spi_init0();
uart_init0();
pyb_usb_init0();
usbdbg_init();
if (sensor_init() != 0) {
__fatal_error("Failed to init sensor");
}
/* Export functions to the global python namespace */
mp_store_global(qstr_from_str("randint"), (mp_obj_t)&py_randint_obj);
mp_store_global(qstr_from_str("cpu_freq"), (mp_obj_t)&py_cpu_freq_obj);
mp_store_global(qstr_from_str("Image"), (mp_obj_t)&py_image_load_image_obj);
mp_store_global(qstr_from_str("HaarCascade"), (mp_obj_t)&py_image_load_cascade_obj);
mp_store_global(qstr_from_str("FreakDesc"), (mp_obj_t)&py_image_load_descriptor_obj);
mp_store_global(qstr_from_str("FreakDescSave"), (mp_obj_t)&py_image_save_descriptor_obj);
mp_store_global(qstr_from_str("LBPDesc"), (mp_obj_t)&py_image_load_lbp_obj);
mp_store_global(qstr_from_str("vcp_is_connected"), (mp_obj_t)&py_vcp_is_connected_obj);
if (sdcard_is_present()) {
sdcard_init();
FRESULT res = f_mount(&fatfs, "1:", 1);
if (res != FR_OK) {
__fatal_error("could not mount SD\n");
}
// Set CWD and USB medium to SD
f_chdrive("1:");
pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_SDCARD;
} else {
storage_init();
// try to mount the flash
FRESULT res = f_mount(&fatfs, "0:", 1);
if (res == FR_NO_FILESYSTEM) {
// create a fresh fs
make_flash_fs();
} else if (res != FR_OK) {
__fatal_error("could not access LFS\n");
}
// Set CWD and USB medium to flash
f_chdrive("0:");
pyb_usb_storage_medium = PYB_USB_STORAGE_MEDIUM_FLASH;
}
// turn boot-up LEDs off
led_state(LED_RED, 0);
led_state(LED_GREEN, 0);
led_state(LED_BLUE, 0);
// init USB device to default setting if it was not already configured
if (!(pyb_usb_flags & PYB_USB_FLAG_USB_MODE_CALLED)) {
pyb_usb_dev_init(USBD_VID, USBD_PID_CDC_MSC, USBD_MODE_CDC_MSC, NULL);
}
// Run the main script from the current directory.
FRESULT res = f_stat("main.py", NULL);
if (res == FR_OK) {
if (!pyexec_file("main.py")) {
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
flash_error(3);
nlr_pop();
}
}
}
// Enter REPL
nlr_buf_t nlr;
for (;;) {
if (nlr_push(&nlr) == 0) {
while (usbdbg_script_ready()) {
nlr_buf_t nlr;
vstr_t *script_buf = usbdbg_get_script();
// clear script flag
usbdbg_clr_script();
// execute the script
if (nlr_push(&nlr) == 0) {
pyexec_push_scope();
// parse and compile script
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_,
vstr_str(script_buf), vstr_len(script_buf), 0);
mp_parse_node_t pn = mp_parse(lex, MP_PARSE_FILE_INPUT);
mp_obj_t script = mp_compile(pn, lex->source_name, MP_EMIT_OPT_NONE, false);
// execute the script
mp_call_function_0(script);
nlr_pop();
} else {
mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
}
pyexec_pop_scope();
}
// clear script flag
usbdbg_clr_script();
// no script run REPL
pyexec_friendly_repl();
nlr_pop();
}
}
printf("PYB: sync filesystems\n");
storage_flush();
printf("PYB: soft reboot\n");
goto soft_reset;
}
mp_obj_t mp_builtin___import__(size_t n_args, const mp_obj_t *args) {
#if DEBUG_PRINT
DEBUG_printf("__import__:\n");
for (size_t i = 0; i < n_args; i++) {
DEBUG_printf(" ");
mp_obj_print(args[i], PRINT_REPR);
DEBUG_printf("\n");
}
#endif
mp_obj_t module_name = args[0];
mp_obj_t fromtuple = mp_const_none;
mp_int_t level = 0;
if (n_args >= 4) {
fromtuple = args[3];
if (n_args >= 5) {
level = MP_OBJ_SMALL_INT_VALUE(args[4]);
if (level < 0) {
mp_raise_ValueError(NULL);
}
}
}
size_t mod_len;
const char *mod_str = mp_obj_str_get_data(module_name, &mod_len);
if (level != 0) {
// What we want to do here is to take name of current module,
// chop <level> trailing components, and concatenate with passed-in
// module name, thus resolving relative import name into absolute.
// This even appears to be correct per
// http://legacy.python.org/dev/peps/pep-0328/#relative-imports-and-name
// "Relative imports use a module's __name__ attribute to determine that
// module's position in the package hierarchy."
level--;
mp_obj_t this_name_q = mp_obj_dict_get(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(MP_QSTR___name__));
assert(this_name_q != MP_OBJ_NULL);
#if MICROPY_CPYTHON_COMPAT
if (MP_OBJ_QSTR_VALUE(this_name_q) == MP_QSTR___main__) {
// This is a module run by -m command-line switch, get its real name from backup attribute
this_name_q = mp_obj_dict_get(MP_OBJ_FROM_PTR(mp_globals_get()), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
}
#endif
mp_map_t *globals_map = &mp_globals_get()->map;
mp_map_elem_t *elem = mp_map_lookup(globals_map, MP_OBJ_NEW_QSTR(MP_QSTR___path__), MP_MAP_LOOKUP);
bool is_pkg = (elem != NULL);
#if DEBUG_PRINT
DEBUG_printf("Current module/package: ");
mp_obj_print(this_name_q, PRINT_REPR);
DEBUG_printf(", is_package: %d", is_pkg);
DEBUG_printf("\n");
#endif
size_t this_name_l;
const char *this_name = mp_obj_str_get_data(this_name_q, &this_name_l);
const char *p = this_name + this_name_l;
if (!is_pkg) {
// We have module, but relative imports are anchored at package, so
// go there.
chop_component(this_name, &p);
}
while (level--) {
chop_component(this_name, &p);
}
// We must have some component left over to import from
if (p == this_name) {
mp_raise_ValueError("cannot perform relative import");
}
uint new_mod_l = (mod_len == 0 ? (size_t)(p - this_name) : (size_t)(p - this_name) + 1 + mod_len);
char *new_mod = mp_local_alloc(new_mod_l);
memcpy(new_mod, this_name, p - this_name);
if (mod_len != 0) {
new_mod[p - this_name] = '.';
memcpy(new_mod + (p - this_name) + 1, mod_str, mod_len);
}
qstr new_mod_q = qstr_from_strn(new_mod, new_mod_l);
mp_local_free(new_mod);
DEBUG_printf("Resolved base name for relative import: '%s'\n", qstr_str(new_mod_q));
module_name = MP_OBJ_NEW_QSTR(new_mod_q);
mod_str = qstr_str(new_mod_q);
mod_len = new_mod_l;
}
// check if module already exists
qstr module_name_qstr = mp_obj_str_get_qstr(module_name);
mp_obj_t module_obj = mp_module_get(module_name_qstr);
if (module_obj != MP_OBJ_NULL) {
DEBUG_printf("Module already loaded\n");
// If it's not a package, return module right away
char *p = strchr(mod_str, '.');
if (p == NULL) {
return module_obj;
}
// If fromlist is not empty, return leaf module
if (fromtuple != mp_const_none) {
return module_obj;
}
// Otherwise, we need to return top-level package
qstr pkg_name = qstr_from_strn(mod_str, p - mod_str);
return mp_module_get(pkg_name);
}
DEBUG_printf("Module not yet loaded\n");
uint last = 0;
VSTR_FIXED(path, MICROPY_ALLOC_PATH_MAX)
module_obj = MP_OBJ_NULL;
mp_obj_t top_module_obj = MP_OBJ_NULL;
mp_obj_t outer_module_obj = MP_OBJ_NULL;
uint i;
for (i = 1; i <= mod_len; i++) {
if (i == mod_len || mod_str[i] == '.') {
// create a qstr for the module name up to this depth
qstr mod_name = qstr_from_strn(mod_str, i);
DEBUG_printf("Processing module: %s\n", qstr_str(mod_name));
DEBUG_printf("Previous path: =%.*s=\n", vstr_len(&path), vstr_str(&path));
// find the file corresponding to the module name
mp_import_stat_t stat;
if (vstr_len(&path) == 0) {
// first module in the dotted-name; search for a directory or file
stat = find_file(mod_str, i, &path);
} else {
// latter module in the dotted-name; append to path
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_strn(&path, mod_str + last, i - last);
stat = stat_dir_or_file(&path);
}
DEBUG_printf("Current path: %.*s\n", vstr_len(&path), vstr_str(&path));
if (stat == MP_IMPORT_STAT_NO_EXIST) {
#if MICROPY_MODULE_WEAK_LINKS
// check if there is a weak link to this module
if (i == mod_len) {
mp_map_elem_t *el = mp_map_lookup((mp_map_t*)&mp_builtin_module_weak_links_map, MP_OBJ_NEW_QSTR(mod_name), MP_MAP_LOOKUP);
if (el == NULL) {
goto no_exist;
}
// found weak linked module
module_obj = el->value;
mp_module_call_init(mod_name, module_obj);
} else {
no_exist:
#else
{
#endif
// couldn't find the file, so fail
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
mp_raise_msg(&mp_type_ImportError, "module not found");
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ImportError,
"no module named '%q'", mod_name));
}
}
} else {
// found the file, so get the module
module_obj = mp_module_get(mod_name);
}
if (module_obj == MP_OBJ_NULL) {
// module not already loaded, so load it!
module_obj = mp_obj_new_module(mod_name);
// if args[3] (fromtuple) has magic value False, set up
// this module for command-line "-m" option (set module's
// name to __main__ instead of real name). Do this only
// for *modules* however - packages never have their names
// replaced, instead they're -m'ed using a special __main__
// submodule in them. (This all apparently is done to not
// touch package name itself, which is important for future
// imports).
if (i == mod_len && fromtuple == mp_const_false && stat != MP_IMPORT_STAT_DIR) {
mp_obj_module_t *o = MP_OBJ_TO_PTR(module_obj);
mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR___main__));
#if MICROPY_CPYTHON_COMPAT
// Store module as "__main__" in the dictionary of loaded modules (returned by sys.modules).
mp_obj_dict_store(MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_loaded_modules_dict)), MP_OBJ_NEW_QSTR(MP_QSTR___main__), module_obj);
// Store real name in "__main__" attribute. Chosen semi-randonly, to reuse existing qstr's.
mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___main__), MP_OBJ_NEW_QSTR(mod_name));
#endif
}
if (stat == MP_IMPORT_STAT_DIR) {
DEBUG_printf("%.*s is dir\n", vstr_len(&path), vstr_str(&path));
// https://docs.python.org/3/reference/import.html
// "Specifically, any module that contains a __path__ attribute is considered a package."
mp_store_attr(module_obj, MP_QSTR___path__, mp_obj_new_str(vstr_str(&path), vstr_len(&path)));
size_t orig_path_len = path.len;
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_str(&path, "__init__.py");
if (stat_file_py_or_mpy(&path) != MP_IMPORT_STAT_FILE) {
//mp_warning("%s is imported as namespace package", vstr_str(&path));
} else {
do_load(module_obj, &path);
}
path.len = orig_path_len;
} else { // MP_IMPORT_STAT_FILE
do_load(module_obj, &path);
// This should be the last component in the import path. If there are
// remaining components then it's an ImportError because the current path
// (the module that was just loaded) is not a package. This will be caught
// on the next iteration because the file will not exist.
}
}
if (outer_module_obj != MP_OBJ_NULL) {
qstr s = qstr_from_strn(mod_str + last, i - last);
mp_store_attr(outer_module_obj, s, module_obj);
}
outer_module_obj = module_obj;
if (top_module_obj == MP_OBJ_NULL) {
top_module_obj = module_obj;
}
last = i + 1;
}
}
STATIC int pyexec_friendly_repl_process_char(int c) {
int ret = readline_process_char(c);
if (!repl.cont_line) {
if (ret == CHAR_CTRL_A) {
// change to raw REPL
pyexec_mode_kind = PYEXEC_MODE_RAW_REPL;
mp_hal_stdout_tx_str("\r\n");
pyexec_raw_repl_process_char(CHAR_CTRL_A);
return 0;
} else if (ret == CHAR_CTRL_B) {
// reset friendly REPL
mp_hal_stdout_tx_str("\r\n");
mp_hal_stdout_tx_str("Micro Python " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; " MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME "\r\n");
mp_hal_stdout_tx_str("Type \"help()\" for more information.\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_C) {
// break
mp_hal_stdout_tx_str("\r\n");
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// exit for a soft reset
mp_hal_stdout_tx_str("\r\n");
vstr_clear(&repl.line);
return PYEXEC_FORCED_EXIT;
}
if (ret < 0) {
return 0;
}
if (!mp_repl_continue_with_input(vstr_null_terminated_str(&repl.line))) {
goto exec;
}
vstr_add_byte(&repl.line, '\n');
repl.cont_line = true;
readline_note_newline("... ");
return 0;
} else {
if (ret == CHAR_CTRL_C) {
// cancel everything
mp_hal_stdout_tx_str("\r\n");
repl.cont_line = false;
goto input_restart;
} else if (ret == CHAR_CTRL_D) {
// stop entering compound statement
goto exec;
}
if (ret < 0) {
return 0;
}
if (mp_repl_continue_with_input(vstr_null_terminated_str(&repl.line))) {
vstr_add_byte(&repl.line, '\n');
readline_note_newline("... ");
return 0;
}
exec: ;
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&repl.line), vstr_len(&repl.line), 0);
if (lex == NULL) {
printf("MemoryError\n");
} else {
int ret = parse_compile_execute(lex, MP_PARSE_SINGLE_INPUT, EXEC_FLAG_ALLOW_DEBUGGING | EXEC_FLAG_IS_REPL);
if (ret & PYEXEC_FORCED_EXIT) {
return ret;
}
}
input_restart:
vstr_reset(&repl.line);
repl.cont_line = false;
readline_init(&repl.line, ">>> ");
return 0;
}
}
mp_obj_t mp_builtin___import__(uint n_args, mp_obj_t *args) {
/*
printf("import:\n");
for (int i = 0; i < n_args; i++) {
printf(" ");
mp_obj_print(args[i], PRINT_REPR);
printf("\n");
}
*/
mp_obj_t fromtuple = mp_const_none;
int level = 0;
if (n_args >= 4) {
fromtuple = args[3];
if (n_args >= 5) {
level = MP_OBJ_SMALL_INT_VALUE(args[4]);
}
}
if (level != 0) {
nlr_jump(mp_obj_new_exception_msg(&mp_type_NotImplementedError,
"Relative import is not implemented"));
}
uint mod_len;
const char *mod_str = (const char*)mp_obj_str_get_data(args[0], &mod_len);
// check if module already exists
mp_obj_t module_obj = mp_module_get(mp_obj_str_get_qstr(args[0]));
if (module_obj != MP_OBJ_NULL) {
// If it's not a package, return module right away
char *p = strchr(mod_str, '.');
if (p == NULL) {
return module_obj;
}
// If fromlist is not empty, return leaf module
if (fromtuple != mp_const_none) {
return module_obj;
}
// Otherwise, we need to return top-level package
qstr pkg_name = qstr_from_strn(mod_str, p - mod_str);
return mp_module_get(pkg_name);
}
uint last = 0;
VSTR_FIXED(path, MICROPY_PATH_MAX)
module_obj = MP_OBJ_NULL;
mp_obj_t top_module_obj = MP_OBJ_NULL;
mp_obj_t outer_module_obj = MP_OBJ_NULL;
uint i;
for (i = 1; i <= mod_len; i++) {
if (i == mod_len || mod_str[i] == '.') {
// create a qstr for the module name up to this depth
qstr mod_name = qstr_from_strn(mod_str, i);
// find the file corresponding to the module name
mp_import_stat_t stat;
if (vstr_len(&path) == 0) {
// first module in the dotted-name; search for a directory or file
stat = find_file(mod_str, i, &path);
} else {
// latter module in the dotted-name; append to path
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_strn(&path, mod_str + last, i - last);
stat = stat_dir_or_file(&path);
}
// fail if we couldn't find the file
if (stat == MP_IMPORT_STAT_NO_EXIST) {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ImportError, "ImportError: No module named '%s'", qstr_str(mod_name)));
}
module_obj = mp_module_get(mod_name);
if (module_obj == MP_OBJ_NULL) {
// module not already loaded, so load it!
module_obj = mp_obj_new_module(mod_name);
if (stat == MP_IMPORT_STAT_DIR) {
vstr_add_char(&path, PATH_SEP_CHAR);
vstr_add_str(&path, "__init__.py");
if (mp_import_stat(vstr_str(&path)) != MP_IMPORT_STAT_FILE) {
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ImportError,
"Per PEP-420 a dir without __init__.py (%s) is a namespace package; "
"namespace packages are not supported", vstr_str(&path)));
}
do_load(module_obj, &path);
vstr_cut_tail_bytes(&path, sizeof("/__init__.py") - 1); // cut off /__init__.py
} else { // MP_IMPORT_STAT_FILE
do_load(module_obj, &path);
// TODO: We cannot just break here, at the very least, we must execute
// trailer code below. But otherwise if there're remaining components,
// that would be (??) object path within module, not modules path within FS.
// break;
}
}
if (outer_module_obj != MP_OBJ_NULL) {
qstr s = qstr_from_strn(mod_str + last, i - last);
mp_store_attr(outer_module_obj, s, module_obj);
}
outer_module_obj = module_obj;
if (top_module_obj == MP_OBJ_NULL) {
top_module_obj = module_obj;
}
last = i + 1;
}
}
if (i < mod_len) {
// we loaded a package, now need to load objects from within that package
// TODO
assert(0);
}
// If fromlist is not empty, return leaf module
if (fromtuple != mp_const_none) {
return module_obj;
}
// Otherwise, we need to return top-level package
return top_module_obj;
}
