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将 i2c-tools 代码下载到 Android 源码的 external 目录下，在 i2c-tools 目录下新建 文件，内容如下：

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE_TAGS := engLOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/$(KERNEL_DIR)/includeLOCAL_SRC_FILES := tools/i2cbusses.c tools/util.cLOCAL_MODULE := i2c-toolsinclude $(BUILD_STATIC_LIBRARY)include $(CLEAR_VARS)LOCAL_MODULE_TAGS := engLOCAL_SRC_FILES:=tools/i2cdetect.cLOCAL_MODULE:=i2cdetectLOCAL_CPPFLAGS += -DANDROIDLOCAL_SHARED_LIBRARIES:=libcLOCAL_STATIC_LIBRARIES := i2c-toolsLOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/$(KERNEL_DIR)/includeinclude $(BUILD_EXECUTABLE)include $(CLEAR_VARS)LOCAL_MODULE_TAGS := engLOCAL_SRC_FILES:=tools/i2cget.cLOCAL_MODULE:=i2cgetLOCAL_CPPFLAGS += -DANDROIDLOCAL_SHARED_LIBRARIES:=libcLOCAL_STATIC_LIBRARIES := i2c-toolsLOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/$(KERNEL_DIR)/includeinclude $(BUILD_EXECUTABLE)include $(CLEAR_VARS)LOCAL_MODULE_TAGS := engLOCAL_SRC_FILES:=tools/i2cset.cLOCAL_MODULE:=i2csetLOCAL_CPPFLAGS += -DANDROIDLOCAL_SHARED_LIBRARIES:=libcLOCAL_STATIC_LIBRARIES := i2c-toolsLOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/$(KERNEL_DIR)/includeinclude $(BUILD_EXECUTABLE)include $(CLEAR_VARS)LOCAL_MODULE_TAGS := engLOCAL_SRC_FILES:=tools/i2cdump.cLOCAL_MODULE:=i2cdumpLOCAL_CPPFLAGS += -DANDROIDLOCAL_SHARED_LIBRARIES:=libcLOCAL_STATIC_LIBRARIES := i2c-toolsLOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/$(KERNEL_DIR)/includeinclude $(BUILD_EXECUTABLE)

然后 Android根目录：

source build/envsetup.sh cd external/i2c-tools mm

编译后在 out/target/product/xxx/system/bin目录下生成4个可执行程序:

i2cdetecti2cdumpi2cgeti2cset

通过 adb push 之间将编译生成的4个文件复制到 Android 平台的 /system/bin 目录下。 在 abd pusll 之前，要先将 system 分区 remount 成可写入模式。

adb shellcd system/bin

用i2cdetect检测有几组i2c总线在系统上：

i2cdetect -l

用i2cdetect检测挂载在i2c_n总线上器件：

i2cdetect-r -y 0  i2cdetect-r -y 1...

用i2cget获取挂在在i2c总线上的设备中某个寄存器中的值

i2cget -y -f 2 0x24 0x0a0x7f

读取 0x34地址设备的 0x28寄存器值

/system/bin # i2cget -f -y 0 0x34 0x28

向地址为0x34的设备 的0x24地址 寄存器 写入 0xfb

/system/bin # i2cset -f -y 0 0x34 0x28 0xfb