mruby/c 組込みの素振り

#mruby/c

mruby/c 組み込みの練習がてら、新規のプロジェクトから mruby/c のVMを呼び出してみる。手順は以下の通り。

my_mruby ディレクトリを作成、mrubycからコピーしてきたhalとsrcを配置する

https://github.com/mrubyc/mrubyc

VMを起動する src/main.c を用意する

ビルドが通るようにMakefileを修正

code:files

my_mrubyc/

├── hal

│ └── posix

│ ├── hal.c

│ └── hal.h

└── src

├── Makefile （既存のMakefileを修正）

├── main.c （ここからVMを起動）

...

└── （オリジナルのファイルをコピーしてくる）

src/main.c からVMを起動する。sample_c/sample_include.c をベースにちょっと修正したもの。

code:src/main.c

#include <stdio.h>

#include <stdlib.h>

#include "mrubyc.h"

// mrbc -E -Bary sample_include_bytecode.rb

// while true

// puts "sample"

// sleep 1

// end

const uint8_t mrbbuf[] = {

0x52,0x49,0x54,0x45,0x30,0x33,0x30,0x30,0x00,0x00,0x00,0x6a,0x4d,0x41,0x54,0x5a,

0x30,0x30,0x30,0x30,0x49,0x52,0x45,0x50,0x00,0x00,0x00,0x4e,0x30,0x33,0x30,0x30,

0x00,0x00,0x00,0x42,0x00,0x01,0x00,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x15,

0x51,0x02,0x00,0x2d,0x01,0x00,0x01,0x07,0x02,0x2d,0x01,0x01,0x01,0x25,0xff,0xf0,

0x11,0x01,0x38,0x01,0x69,0x00,0x01,0x00,0x00,0x06,0x73,0x61,0x6d,0x70,0x6c,0x65,

0x00,0x00,0x02,0x00,0x04,0x70,0x75,0x74,0x73,0x00,0x00,0x05,0x73,0x6c,0x65,0x65,

0x70,0x00,0x45,0x4e,0x44,0x00,0x00,0x00,0x00,0x08,

};

#if !defined(MRBC_MEMORY_SIZE)

#define MRBC_MEMORY_SIZE (1024*40)

#endif

static uint8_t memory_poolMRBC_MEMORY_SIZE;

int main(void)

{

mrbc_init(memory_pool, MRBC_MEMORY_SIZE);

if( mrbc_create_task(mrbbuf, 0) != NULL ){

mrbc_run();

}

return 0;

}

既存のMakefileをちょっと修正。

code:src/Makefile

include hal_selector.mk

LIBMRUBYC = $(BUILD_DIR)/libmrubyc.a

MRUBYC_BIN = $(BUILD_DIR)/my_mrubyc

TARGETS = $(MRUBYC_BIN) $(LIBMRUBYC)

CFLAGS += -Wall -g #-std=c99 -pedantic -pedantic-errors

SRCS = alloc.c c_array.c c_hash.c c_math.c c_numeric.c \

c_object.c c_range.c c_string.c class.c console.c error.c global.c \

keyvalue.c load.c mrblib.c rrt0.c symbol.c value.c vm.c hal.c

OBJS = $(addprefix $(BUILD_DIR)/, $(SRCS:.c=.o))

BUILD_DIR = ../build

.PHONY: all

all: $(TARGETS)

$(LIBMRUBYC): $(OBJS)

$(AR) $(ARFLAGS) $@ $?

$(BUILD_DIR)/%.o: %.c

@-mkdir -p $(BUILD_DIR)

$(CC) -c $(CFLAGS) -o $@ $<

$(MRUBYC_BIN): main.c $(LIBMRUBYC)

$(CC) $(CFLAGS) -o $@ $< $(LIBMRUBYC)

.PHONY: clean

clean:

@rm -f $(TARGETS) $(OBJS) *~

# File dependencies.

$(BUILD_DIR)/hal.o: $(HAL_DIR)/hal.c $(HAL_DIR)/hal.h

$(CC) -c $(CFLAGS) -o $(BUILD_DIR)/hal.o $<

ビルドと実行手順

code:sh

$ cd my_mrubyc/src

$ make

$ ../build/my_mrubyc

sample

...

https://gyazo.com/b52c6587daaa7152f2073af91d0a4e7b