android添加i2c-tools工具

1、下载i2c工具，下载你需要的版本：

下载地址：Index of /pub/software/utils/i2c-tools/

2、这里以版本i2c-tools-4.1.tar.gz为例，首先，解压该压缩包，将文件i2c-tools-4.1置入android/external/目录下

3、在i2c-tools-4.1中添加编译文件Anddoid.mk

LOCAL_PATH:= $(call my-dir)
 
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_C_INCLUDES += $(LOCAL_PATH) \
	$(LOCAL_PATH)$(KERNEL_DIR)/include \
	$(LOCAL_PATH)/include/i2c/smbus.h
LOCAL_SRC_FILES := tools/i2cbusses.c \
	tools/util.c \
    lib/smbus.c
LOCAL_MODULE := i2c-tools
include $(BUILD_STATIC_LIBRARY)
 
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES:=tools/i2cdetect.c
LOCAL_MODULE:=i2cdetect
LOCAL_CPPFLAGS += -DANDROID
LOCAL_SHARED_LIBRARIES:=libc
LOCAL_STATIC_LIBRARIES := i2c-tools
LOCAL_C_INCLUDES += $(LOCAL_PATH) \
	$(LOCAL_PATH)/$(KERNEL_DIR)/include \
	$(LOCAL_PATH)/include/i2c/smbus.h
include $(BUILD_EXECUTABLE)
 
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES:=tools/i2cget.c
LOCAL_MODULE:=i2cget
LOCAL_CPPFLAGS += -DANDROID
LOCAL_SHARED_LIBRARIES:=libc
LOCAL_STATIC_LIBRARIES := i2c-tools
LOCAL_C_INCLUDES += $(LOCAL_PATH) \
	$(LOCAL_PATH)/$(KERNEL_DIR)/include \
	$(LOCAL_PATH)/include/i2c/smbus.h
include $(BUILD_EXECUTABLE)
 
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES:=tools/i2cset.c
LOCAL_MODULE:=i2cset
LOCAL_CPPFLAGS += -DANDROID
LOCAL_SHARED_LIBRARIES:=libc
LOCAL_STATIC_LIBRARIES := i2c-tools
LOCAL_C_INCLUDES += $(LOCAL_PATH) \
	$(LOCAL_PATH)/$(KERNEL_DIR)/include \
	$(LOCAL_PATH)/include/i2c/smbus.h
include $(BUILD_EXECUTABLE)
 
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_SRC_FILES:=tools/i2cdump.c
LOCAL_MODULE:=i2cdump
LOCAL_CPPFLAGS += -DANDROID
LOCAL_SHARED_LIBRARIES:=libc
LOCAL_STATIC_LIBRARIES := i2c-tools
LOCAL_C_INCLUDES += $(LOCAL_PATH) \
	$(LOCAL_PATH)/$(KERNEL_DIR)/include \
	$(LOCAL_PATH)/include/i2c/smbus.h
include $(BUILD_EXECUTABLE)

4、然后source,lunch检索一下

5、进入到android/external/i2c-tools-4.1目录下，执行“mmm”，进行模块编译，或者进行./build.sh -AUCK全编,编完后，在路径“out/target/product/xxx/system/bin”目录下会生成4个执行文件，如下：
i2cdetect
i2cdump
i2cget
i2cset

6、也可以在编译系统的时候把该模块添加进来，在device/xxx/device.mk里面添加：

           PRODUCT_PACKAGES += \
                                     i2cdetect \
                                     i2cget \
                                     i2cdump \
                                     i2cset

7、将文件推送到android设备的system/bin目录下 或者重编整个系统，再整体下载镜像，这样设备就附带有这4个命令了