examples/embedding: Example for embedding MicroPython in an app.

examples/embedding/Makefile

+MPTOP = ../..
+CFLAGS = -std=c99 -I. -I$(MPTOP) -DNO_QSTR
+LDFLAGS = -L.
+
+hello-embed: hello-embed.o -lmicropython
+
+-lmicropython:
+	$(MAKE) -f $(MPTOP)/examples/embedding/Makefile.upylib MPTOP=$(MPTOP)

examples/embedding/Makefile.upylib

+MPTOP = ../..
+-include mpconfigport.mk
+include $(MPTOP)/py/mkenv.mk
+
+all: lib
+
+# OS name, for simple autoconfig
+UNAME_S := $(shell uname -s)
+
+# include py core make definitions
+include $(MPTOP)/py/py.mk
+
+INC +=  -I.
+INC +=  -I..
+INC +=  -I$(MPTOP)
+INC +=  -I$(MPTOP)/unix
+#INC += -I../lib/timeutils
+INC += -I$(BUILD)
+
+# compiler settings
+CWARN = -Wall -Werror
+CWARN += -Wpointer-arith -Wuninitialized
+CFLAGS = $(INC) $(CWARN) -ansi -std=gnu99 -DUNIX $(CFLAGS_MOD) $(COPT) $(CFLAGS_EXTRA)
+
+# Debugging/Optimization
+ifdef DEBUG
+CFLAGS += -g
+COPT = -O0
+else
+COPT = -Os #-DNDEBUG
+# _FORTIFY_SOURCE is a feature in gcc/glibc which is intended to provide extra
+# security for detecting buffer overflows. Some distros (Ubuntu at the very least)
+# have it enabled by default.
+#
+# gcc already optimizes some printf calls to call puts and/or putchar. When
+# _FORTIFY_SOURCE is enabled and compiling with -O1 or greater, then some
+# printf calls will also be optimized to call __printf_chk (in glibc). Any
+# printfs which get redirected to __printf_chk are then no longer synchronized
+# with printfs that go through mp_printf.
+#
+# In MicroPython, we don't want to use the runtime library's printf but rather
+# go through mp_printf, so that stdout is properly tied into streams, etc.
+# This means that we either need to turn off _FORTIFY_SOURCE or provide our
+# own implementation of __printf_chk. We've chosen to turn off _FORTIFY_SOURCE.
+# It should also be noted that the use of printf in MicroPython is typically
+# quite limited anyways (primarily for debug and some error reporting, etc
+# in the unix version).
+#
+# Information about _FORTIFY_SOURCE seems to be rather scarce. The best I could
+# find was this: https://securityblog.redhat.com/2014/03/26/fortify-and-you/
+# Original patchset was introduced by
+# https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html .
+#
+# Turning off _FORTIFY_SOURCE is only required when compiling with -O1 or greater
+CFLAGS += -U _FORTIFY_SOURCE
+endif
+
+# On OSX, 'gcc' is a symlink to clang unless a real gcc is installed.
+# The unix port of micropython on OSX must be compiled with clang,
+# while cross-compile ports require gcc, so we test here for OSX and 
+# if necessary override the value of 'CC' set in py/mkenv.mk
+ifeq ($(UNAME_S),Darwin)
+CC = clang
+# Use clang syntax for map file
+LDFLAGS_ARCH = -Wl,-map,$@.map
+else
+# Use gcc syntax for map file
+LDFLAGS_ARCH = -Wl,-Map=$@.map,--cref
+endif
+LDFLAGS = $(LDFLAGS_MOD) $(LDFLAGS_ARCH) -lm $(LDFLAGS_EXTRA)
+
+ifeq ($(MICROPY_FORCE_32BIT),1)
+# Note: you may need to install i386 versions of dependency packages,
+# starting with linux-libc-dev:i386
+ifeq ($(MICROPY_PY_FFI),1)
+ifeq ($(UNAME_S),Linux)
+CFLAGS_MOD += -I/usr/include/i686-linux-gnu
+endif
+endif
+endif
+
+ifeq ($(MICROPY_USE_READLINE),1)
+INC +=  -I../lib/mp-readline
+CFLAGS_MOD += -DMICROPY_USE_READLINE=1
+LIB_SRC_C_EXTRA += mp-readline/readline.c
+endif
+ifeq ($(MICROPY_USE_READLINE),2)
+CFLAGS_MOD += -DMICROPY_USE_READLINE=2
+LDFLAGS_MOD += -lreadline
+# the following is needed for BSD
+#LDFLAGS_MOD += -ltermcap
+endif
+ifeq ($(MICROPY_PY_TIME),1)
+CFLAGS_MOD += -DMICROPY_PY_TIME=1
+SRC_MOD += modtime.c
+endif
+ifeq ($(MICROPY_PY_TERMIOS),1)
+CFLAGS_MOD += -DMICROPY_PY_TERMIOS=1
+SRC_MOD += modtermios.c
+endif
+ifeq ($(MICROPY_PY_SOCKET),1)
+CFLAGS_MOD += -DMICROPY_PY_SOCKET=1
+SRC_MOD += modsocket.c
+endif
+
+ifeq ($(MICROPY_PY_FFI),1)
+
+ifeq ($(MICROPY_STANDALONE),1)
+LIBFFI_CFLAGS_MOD := -I$(shell ls -1d ../lib/libffi/build_dir/out/lib/libffi-*/include)
+ ifeq ($(MICROPY_FORCE_32BIT),1)
+  LIBFFI_LDFLAGS_MOD = ../lib/libffi/build_dir/out/lib32/libffi.a
+ else
+  LIBFFI_LDFLAGS_MOD = ../lib/libffi/build_dir/out/lib/libffi.a
+ endif
+else
+LIBFFI_CFLAGS_MOD := $(shell pkg-config --cflags libffi)
+LIBFFI_LDFLAGS_MOD := $(shell pkg-config --libs libffi)
+endif
+
+ifeq ($(UNAME_S),Linux)
+LIBFFI_LDFLAGS_MOD += -ldl
+endif
+
+CFLAGS_MOD += $(LIBFFI_CFLAGS_MOD) -DMICROPY_PY_FFI=1
+LDFLAGS_MOD += $(LIBFFI_LDFLAGS_MOD)
+SRC_MOD += modffi.c
+endif
+
+MAIN_C = main.c
+
+# source files
+SRC_C = $(addprefix $(MPTOP)/unix/,\
+	$(MAIN_C) \
+	gccollect.c \
+	unix_mphal.c \
+	input.c \
+	file.c \
+	modmachine.c \
+	modos.c \
+	moduselect.c \
+	alloc.c \
+	coverage.c \
+	fatfs_port.c \
+	$(SRC_MOD) \
+	)
+
+LIB_SRC_C = $(addprefix lib/,\
+	$(LIB_SRC_C_EXTRA) \
+	utils/printf.c \
+	timeutils/timeutils.c \
+	)
+
+ifeq ($(MICROPY_FATFS),1)
+LIB_SRC_C += $(addprefix lib/,\
+	fatfs/ff.c \
+	fatfs/option/ccsbcs.c \
+	)
+endif
+
+OBJ = $(PY_O)
+OBJ += $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
+OBJ += $(addprefix $(BUILD)/, $(LIB_SRC_C:.c=.o))
+OBJ += $(addprefix $(BUILD)/, $(STMHAL_SRC_C:.c=.o))
+
+# List of sources for qstr extraction
+SRC_QSTR += $(SRC_C) $(LIB_SRC_C)
+# Append any auto-generated sources that are needed by sources listed in
+# SRC_QSTR
+SRC_QSTR_AUTO_DEPS +=
+
+include $(MPTOP)/py/mkrules.mk
+
+# Value of configure's --host= option (required for cross-compilation).
+# Deduce it from CROSS_COMPILE by default, but can be overriden.
+ifneq ($(CROSS_COMPILE),)
+CROSS_COMPILE_HOST = --host=$(patsubst %-,%,$(CROSS_COMPILE))
+else
+CROSS_COMPILE_HOST =
+endif
+
+deplibs: libffi axtls
+
+# install-exec-recursive & install-data-am targets are used to avoid building
+# docs and depending on makeinfo
+libffi:
+	cd ../lib/libffi; git clean -d -x -f
+	cd ../lib/libffi; ./autogen.sh
+	mkdir -p ../lib/libffi/build_dir; cd ../lib/libffi/build_dir; \
+	../configure $(CROSS_COMPILE_HOST) --prefix=$$PWD/out CC="$(CC)" CXX="$(CXX)" LD="$(LD)"; \
+	make install-exec-recursive; make -C include install-data-am
+
+axtls: ../lib/axtls/README
+	cd ../lib/axtls; cp config/upyconfig config/.config
+	cd ../lib/axtls; make oldconfig -B
+	cd ../lib/axtls; make clean
+	cd ../lib/axtls; make all CC="$(CC)" LD="$(LD)"
+
+../lib/axtls/README:
+	@echo "You cloned without --recursive, fetching submodules for you."
+	(cd ..; git submodule update --init --recursive)

examples/embedding/hello-embed.c

+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Paul Sokolovsky
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "py/compile.h"
+#include "py/runtime.h"
+#include "py/gc.h"
+#include "py/stackctrl.h"
+
+static char heap[16384];
+
+mp_obj_t execute_from_lexer(mp_lexer_t *lex) {
+    nlr_buf_t nlr;
+    if (nlr_push(&nlr) == 0) {
+        mp_parse_tree_t pt = mp_parse(lex, MP_PARSE_FILE_INPUT);
+        mp_obj_t module_fun = mp_compile(&pt, lex->source_name, MP_EMIT_OPT_NONE, false);
+        mp_call_function_0(module_fun);
+        nlr_pop();
+        return 0;
+    } else {
+        // uncaught exception
+        return (mp_obj_t)nlr.ret_val;
+    }
+}
+
+int main() {
+    // Initialized stack limit
+    mp_stack_set_limit(40000 * (BYTES_PER_WORD / 4));
+    // Initialize heap
+    gc_init(heap, heap + sizeof(heap));
+    // Initialize interpreter
+    mp_init();
+
+    const char str[] = "print('Hello world of easy embedding!')";
+    mp_lexer_t *lex = mp_lexer_new_from_str_len(0/*MP_QSTR_*/, str, strlen(str), false);
+    if (execute_from_lexer(lex)) {
+        printf("Error\n");
+    }
+}
+
+uint mp_import_stat(const char *path) {
+    return MP_IMPORT_STAT_NO_EXIST;
+}
+
+void nlr_jump_fail(void *val) {
+    printf("FATAL: uncaught NLR %p\n", val);
+    exit(1);
+}

examples/embedding/mpconfigport.h

+mpconfigport_minimal.h
\ No newline at end of file

examples/embedding/mpconfigport_minimal.h

+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// options to control how Micro Python is built
+
+#define MICROPY_ALLOC_PATH_MAX      (PATH_MAX)
+#define MICROPY_ENABLE_GC           (1)
+#define MICROPY_ENABLE_FINALISER    (0)
+#define MICROPY_STACK_CHECK         (0)
+#define MICROPY_COMP_CONST          (0)
+#define MICROPY_MEM_STATS           (0)
+#define MICROPY_DEBUG_PRINTERS      (0)
+#define MICROPY_HELPER_REPL         (1)
+#define MICROPY_HELPER_LEXER_UNIX   (1)
+#define MICROPY_ENABLE_SOURCE_LINE  (0)
+#define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_TERSE)
+#define MICROPY_WARNINGS            (0)
+#define MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF   (0)
+#define MICROPY_FLOAT_IMPL          (MICROPY_FLOAT_IMPL_NONE)
+#define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_NONE)
+#define MICROPY_STREAMS_NON_BLOCK   (0)
+#define MICROPY_OPT_COMPUTED_GOTO   (0)
+#define MICROPY_OPT_CACHE_MAP_LOOKUP_IN_BYTECODE (0)
+#define MICROPY_CAN_OVERRIDE_BUILTINS (0)
+#define MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG (0)
+#define MICROPY_CPYTHON_COMPAT      (0)
+#define MICROPY_PY_BUILTINS_BYTEARRAY (0)
+#define MICROPY_PY_BUILTINS_MEMORYVIEW (0)
+#define MICROPY_PY_BUILTINS_COMPILE (0)
+#define MICROPY_PY_BUILTINS_ENUMERATE (0)
+#define MICROPY_PY_BUILTINS_FILTER  (0)
+#define MICROPY_PY_BUILTINS_FROZENSET (0)
+#define MICROPY_PY_BUILTINS_REVERSED (0)
+#define MICROPY_PY_BUILTINS_SET     (0)
+#define MICROPY_PY_BUILTINS_SLICE   (0)
+#define MICROPY_PY_BUILTINS_STR_UNICODE (0)
+#define MICROPY_PY_BUILTINS_PROPERTY (0)
+#define MICROPY_PY_BUILTINS_MIN_MAX (0)
+#define MICROPY_PY___FILE__         (0)
+#define MICROPY_PY_MICROPYTHON_MEM_INFO (0)
+#define MICROPY_PY_GC               (0)
+#define MICROPY_PY_GC_COLLECT_RETVAL (0)
+#define MICROPY_PY_ARRAY            (0)
+#define MICROPY_PY_COLLECTIONS      (0)
+#define MICROPY_PY_MATH             (0)
+#define MICROPY_PY_CMATH            (0)
+#define MICROPY_PY_IO               (0)
+#define MICROPY_PY_IO_FILEIO        (0)
+#define MICROPY_PY_STRUCT           (0)
+#define MICROPY_PY_SYS              (1)
+#define MICROPY_PY_SYS_EXIT         (0)
+#define MICROPY_PY_SYS_PLATFORM     "linux"
+#define MICROPY_PY_SYS_MAXSIZE      (0)
+#define MICROPY_PY_SYS_STDFILES     (0)
+#define MICROPY_PY_CMATH            (0)
+#define MICROPY_PY_UCTYPES          (0)
+#define MICROPY_PY_UZLIB            (0)
+#define MICROPY_PY_UJSON            (0)
+#define MICROPY_PY_URE              (0)
+#define MICROPY_PY_UHEAPQ           (0)
+#define MICROPY_PY_UHASHLIB         (0)
+#define MICROPY_PY_UBINASCII        (0)
+
+extern const struct _mp_obj_module_t mp_module_os;
+
+#define MICROPY_PORT_BUILTIN_MODULES \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_uos), (mp_obj_t)&mp_module_os }, \
+
+#define MICROPY_PORT_ROOT_POINTERS \
+    mp_obj_t keyboard_interrupt_obj;
+
+//////////////////////////////////////////
+// Do not change anything beyond this line
+//////////////////////////////////////////
+
+// Define to 1 to use undertested inefficient GC helper implementation
+// (if more efficient arch-specific one is not available).
+#ifndef MICROPY_GCREGS_SETJMP
+    #ifdef __mips__
+        #define MICROPY_GCREGS_SETJMP (1)
+    #else
+        #define MICROPY_GCREGS_SETJMP (0)
+    #endif
+#endif
+
+// type definitions for the specific machine
+
+#ifdef __LP64__
+typedef long mp_int_t; // must be pointer size
+typedef unsigned long mp_uint_t; // must be pointer size
+#else
+// These are definitions for machines where sizeof(int) == sizeof(void*),
+// regardless for actual size.
+typedef int mp_int_t; // must be pointer size
+typedef unsigned int mp_uint_t; // must be pointer size
+#endif
+
+#define BYTES_PER_WORD sizeof(mp_int_t)
+
+// Cannot include <sys/types.h>, as it may lead to symbol name clashes
+#if _FILE_OFFSET_BITS == 64 && !defined(__LP64__)
+typedef long long mp_off_t;
+#else
+typedef long mp_off_t;
+#endif
+
+typedef void *machine_ptr_t; // must be of pointer size
+typedef const void *machine_const_ptr_t; // must be of pointer size
+
+// We need to provide a declaration/definition of alloca()
+#ifdef __FreeBSD__
+#include <stdlib.h>
+#else
+#include <alloca.h>
+#endif