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zephyr/Makefile: Add minimal port.
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‎zephyr/Makefile‎

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@@ -54,7 +54,7 @@ SRC_QSTR += $(SRC_C)
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OBJ = $(PY_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
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CFLAGS = $(KBUILD_CFLAGS) $(NOSTDINC_FLAGS) $(ZEPHYRINCLUDE) \
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-std=gnu99 -DNDEBUG -DMICROPY_HEAP_SIZE=$(MICROPY_HEAP_SIZE) $(INC)
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-std=gnu99 -DNDEBUG -DMICROPY_HEAP_SIZE=$(MICROPY_HEAP_SIZE) $(CFLAGS_EXTRA) $(INC)
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include ../py/mkrules.mk
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@@ -83,6 +83,9 @@ $(Z_SYSGEN_H):
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rm -f $(LIBMICROPYTHON)
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-$(MAKE) -f Makefile.zephyr BOARD=$(BOARD) CONF_FILE=$(CONF_FILE)
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minimal:
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$(MAKE) BOARD=$(BOARD) CFLAGS_EXTRA='-DMP_CONFIGFILE="<mpconfigport_minimal.h>"' FROZEN_DIR=
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# Clean Zephyr things too
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clean: z_clean
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‎zephyr/README.md‎

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@@ -74,3 +74,22 @@ starts from 0). You will need to adjust it for another board (using board's
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reference materials). To execute the above sample, copy it to clipboard, in
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MicroPython REPL enter "paste mode" using Ctrl+E, paste clipboard, press
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Ctrl+D to finish paste mode and start execution.
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Minimal build
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-------------
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MicroPython is committed to maintain minimal binary size for Zephyr port
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below 128KB, as long as Zephyr project is committed to maintain stable
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minimal size of their kernel (which they appear to be). Note that at such
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size, there is no support for any Zephyr features beyond REPL over UART,
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and only very minimal set of builtin Python modules. Thus, this build
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is more suitable for code size control and quick demonstrations even on
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smaller systems. It's also suitable for careful enabling of features one
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by one to achieve needed functionality and code size. This is in contrast
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to the "default" build, which may get more and more features enabled by
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default over time.
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To make a minimal build:
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make BOARD=<board> minimal

‎zephyr/main.c‎

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@@ -72,7 +72,9 @@ int real_main(void) {
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#endif
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mp_init();
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MP_STATE_PORT(mp_kbd_exception) = mp_obj_new_exception(&mp_type_KeyboardInterrupt);
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#if MICROPY_MODULE_FROZEN
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pyexec_frozen_module("main.py");
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#endif
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#if MICROPY_REPL_EVENT_DRIVEN
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pyexec_event_repl_init();
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for (;;) {

‎zephyr/mpconfigport_minimal.h‎

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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Linaro Limited
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <alloca.h>
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// Include Zephyr's autoconf.h, which should be made first by Zephyr makefiles
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#include "autoconf.h"
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// Usually passed from Makefile
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#ifndef MICROPY_HEAP_SIZE
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#define MICROPY_HEAP_SIZE (16 * 1024)
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#endif
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#define MICROPY_STACK_CHECK (1)
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#define MICROPY_ENABLE_GC (1)
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#define MICROPY_HELPER_REPL (1)
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#define MICROPY_REPL_AUTO_INDENT (1)
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#define MICROPY_CPYTHON_COMPAT (0)
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#define MICROPY_PY_ASYNC_AWAIT (0)
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#define MICROPY_PY_ATTRTUPLE (0)
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#define MICROPY_PY_BUILTINS_ENUMERATE (0)
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#define MICROPY_PY_BUILTINS_FILTER (0)
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#define MICROPY_PY_BUILTINS_MIN_MAX (0)
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#define MICROPY_PY_BUILTINS_PROPERTY (0)
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#define MICROPY_PY_BUILTINS_RANGE_ATTRS (0)
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#define MICROPY_PY_BUILTINS_REVERSED (0)
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#define MICROPY_PY_BUILTINS_SET (0)
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#define MICROPY_PY_BUILTINS_SLICE (0)
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#define MICROPY_PY_ARRAY (0)
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#define MICROPY_PY_COLLECTIONS (0)
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#define MICROPY_PY_CMATH (0)
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#define MICROPY_PY_IO (0)
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#define MICROPY_PY_STRUCT (0)
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#define MICROPY_PY_SYS_MODULES (0)
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#define MICROPY_LONGINT_IMPL (MICROPY_LONGINT_IMPL_LONGLONG)
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#define MICROPY_FLOAT_IMPL (MICROPY_FLOAT_IMPL_FLOAT)
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#define MICROPY_PY_BUILTINS_COMPLEX (0)
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// Saving extra crumbs to make sure binary fits in 128K
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#define MICROPY_COMP_CONST_FOLDING (0)
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#define MICROPY_COMP_CONST (0)
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#define MICROPY_COMP_DOUBLE_TUPLE_ASSIGN (0)
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#ifdef CONFIG_BOARD
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#define MICROPY_HW_BOARD_NAME "zephyr-" CONFIG_BOARD
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#else
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#define MICROPY_HW_BOARD_NAME "zephyr-generic"
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#endif
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#ifdef CONFIG_SOC
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#define MICROPY_HW_MCU_NAME CONFIG_SOC
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#else
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#define MICROPY_HW_MCU_NAME "unknown-cpu"
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#endif
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typedef int mp_int_t; // must be pointer size
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typedef unsigned mp_uint_t; // must be pointer size
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typedef void *machine_ptr_t; // must be of pointer size
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typedef const void *machine_const_ptr_t; // must be of pointer size
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typedef long mp_off_t;
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#define BYTES_PER_WORD (sizeof(mp_int_t))
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#define MP_STATE_PORT MP_STATE_VM
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#define MICROPY_PORT_ROOT_POINTERS \
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mp_obj_t mp_kbd_exception; \
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const char *readline_hist[8];

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