mf_gpio_test

利用开发板上的/dev/mem设备,进行内存映射,驱动cpu的GPIO口,点亮和熄灭led灯.附makefile文件

#	/eldk/usr/ppc-linux/bin/as -I ./include -o obj/taihu.o src/taihu.s
#	/eldk/usr/ppc-linux/bin/gcc -I ./include -c -o obj/gpio_test.o src/gpio_test.c
#	/eldk/usr/ppc-linux/bin/gcc -I ./include -o gpio_test.exe obj/taihu.o obj/gpio_test.o
	
#自定义的Makefile文件--作者:陆冲之

# -----special settings-----------------------------------------------
SRCS:=gpio_test.c
#ASMS:=taihu.S
TARGET:=gpio_test

# -----command--------------------------------------------------------
CC:= ${CROSS_COMPILE}gcc
AS:= ${CROSS_COMPILE}as
LINK:= ${CROSS_COMPILE}gcc
RM:= rm -rf
MV:= mv
#TAR:= tar
#MKDIR:= mkdir

# -----settings-------------------------------------------------------
SRC_SUFFIX:= .c
ASM_SUFFIX:= .S
OBJ_SUFFIX:= .o
LIB_SUFFIX:= .a
DLL_SUFFIX:= .so
BIN_SUFFIX:= .exe

INC_PREFIX:= -I
LIB_PREFIX:= -L

OPT_C:= -c
OPT_OUT:= -o 
OPT_LINKOUT:= -o 
OPT_MATH:= -lm 
OPT_READLINE:= -lreadline -lhistory -ltermcap
OPT_STATIC:= -static

CFLAGS:= $(OPT_C)
LIBFLAGS:= -Debug

# -----directories----------------------------------------------------
SRC_DIR:= ./src
OBJ_DIR:= ./obj
INC_DIR:= ./include
LIB_DIR:= ./lib /usr/local/lib /lib /usr/lib

# -----common settings------------------------------------------------
#SRCS:= $(wildcard $(SRC_DIR)/*$(SRC_SUFFIX))	取目录下所有的.c文件
SRCS := $(patsubst %$(SRC_SUFFIX), $(SRC_DIR)/%$(SRC_SUFFIX), $(SRCS))
ASMS := $(patsubst %$(ASM_SUFFIX), $(SRC_DIR)/%$(ASM_SUFFIX), $(ASMS))
OBJS_C := $(patsubst $(SRC_DIR)/%$(SRC_SUFFIX),$(OBJ_DIR)/%$(OBJ_SUFFIX),$(SRCS))
OBJS_S := $(patsubst $(SRC_DIR)/%$(ASM_SUFFIX),$(OBJ_DIR)/%$(OBJ_SUFFIX),$(ASMS))
INCS := $(INC_PREFIX) $(INC_DIR)

# -----make rule------------------------------------------------------
.PHONY:all clean
all:$(TARGET)
clean:
	$(RM) $(TARGET)$(BIN_SUFFIX) $(OBJS)

$(TARGET):$(OBJS_C) $(OBJS_S)
	$(LINK) $(INC_PREFIX) $(INC_DIR) $(OPT_STATIC) $(OPT_LINKOUT)$(TARGET)$(BIN_SUFFIX) $(LIBS) $(OBJS_C) $(OBJS_S) $(OPT_MATH) $(OPT_READLINE)

$(OBJS_C):$(OBJ_DIR)/%$(OBJ_SUFFIX):$(SRC_DIR)/%$(SRC_SUFFIX)
	$(CC) $(INCS) $(OPT_STATIC) $(CFLAGS) $(OPT_OUT)$@ $<

$(OBJS_S):$(OBJ_DIR)/%$(OBJ_SUFFIX):$(SRC_DIR)/%$(ASM_SUFFIX)
	$(AS) $(INCS) $(OPT_OUT)$@ $<