/************************************************************************** * I.MX6 Android i2c-tools porting * 说明： * 判断I2C总线设备是否存在，每次都去查dmesg，实在是烦了，于是还是移植 * 一个i2c-tools比较好，不用翻那长长内核信息。 * * 2016-3-31 深圳 南山平山村 曾剑锋 *************************************************************************/ 一、参考资料： 1. Android 平台下使用 i2c-tools http://my.oschina.net/luoly/blog/368881 2. 树莓派学习笔记——I2C Tools 学习笔记 http://blog.csdn.net/xukai871105/article/details/15029843 3. Linux I2C工具查看配置I2C设备 http://blog.chinaunix.net/uid-26895763-id-3478882.html 二、download: groeck/i2c-tools: https://github.com/groeck/i2c-tools 三、Decompress： zengjf@zengjf:~$ unzip i2c-tools-master.zip zengjf@zengjf:~$ mv i2c-tools-master ~/myandroid/external/i2c-tools/ 四、cat external/i2c-tools/Android.mk # external/i2c-tools/Android.mk LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := eng LOCAL_C_INCLUDES += $(LOCAL_PATH) $(LOCAL_PATH)/$(KERNEL_DIR)/include LOCAL_SRC_FILES :=tools/util.c tools/i2cbusses.c LOCAL_MODULE := i2c-tools include $(BUILD_STATIC_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := eng 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 include $(BUILD_EXECUTABLE) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := eng 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 include $(BUILD_EXECUTABLE) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := eng 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 include $(BUILD_EXECUTABLE) include $(CLEAR_VARS) LOCAL_MODULE_TAGS := eng 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 include $(BUILD_EXECUTABLE) 五、compile error: 1. 现象： ...... PRODUCT_COPY_FILES frameworks/base/data/sounds/ringtones/ogg/Solarium.ogg:system/media/audio/ringtones/Solarium.ogg ignored. No private recovery resources for TARGET_DEVICE sabresd_6dq make: Entering directory `/home/zengjf/myandroid' target thumb C: i2c-tools <= /home/zengjf/myandroid/external/i2c-tools//lib/smbus.c target StaticLib: i2c-tools (out/target/product/sabresd_6dq/obj/STATIC_LIBRARIES/i2c-tools_intermediates/i2c-tools.a) target thumb C: i2cdetect <= /home/zengjf/myandroid/external/i2c-tools/lib/smbus.c target thumb C: i2cdetect <= /home/zengjf/myandroid/external/i2c-tools/tools/i2cdetect.c /home/zengjf/myandroid/external/i2c-tools/tools/i2cdetect.c:157:13: error: 'I2C_FUNC_SMBUS_PEC' undeclared here (not in a function) make: *** [out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdetect_intermediates/tools/i2cdetect.o] Error 1 make: Leaving directory `/home/zengjf/myandroid' 2. 解决办法： cat external/i2c-tools/include/i2c/smbus.h ..... /* Compatibility defines 添加宏声明*/ #ifndef I2C_SMBUS_I2C_BLOCK_BROKEN #define I2C_SMBUS_I2C_BLOCK_BROKEN I2C_SMBUS_I2C_BLOCK_DATA #endif #ifndef I2C_FUNC_SMBUS_PEC #define I2C_FUNC_SMBUS_PEC I2C_FUNC_SMBUS_HWPEC_CALC #endif extern __s32 i2c_smbus_access(int file, char read_write, __u8 command, int size, union i2c_smbus_data *data); extern __s32 i2c_smbus_write_quick(int file, __u8 value); ...... 3. 正常现象： No private recovery resources for TARGET_DEVICE sabresd_6dq make: Entering directory `/home/zengjf/myandroid' target thumb C: i2cdetect <= /home/zengjf/myandroid/external/i2c-tools/tools/i2cdetect.c target Executable: i2cdetect (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdetect_intermediates/LINKED/i2cdetect) target Symbolic: i2cdetect (out/target/product/sabresd_6dq/symbols/system/bin/i2cdetect) Export includes file: /home/zengjf/myandroid/external/i2c-tools/Android.mk -- out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdetect_intermediates/export_includes target Strip: i2cdetect (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdetect_intermediates/i2cdetect) Install: out/target/product/sabresd_6dq/system/bin/i2cdetect Import includes file: out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cget_intermediates/import_includes target thumb C: i2cget <= /home/zengjf/myandroid/external/i2c-tools/tools/i2cget.c target Executable: i2cget (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cget_intermediates/LINKED/i2cget) target Symbolic: i2cget (out/target/product/sabresd_6dq/symbols/system/bin/i2cget) Export includes file: /home/zengjf/myandroid/external/i2c-tools/Android.mk -- out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cget_intermediates/export_includes target Strip: i2cget (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cget_intermediates/i2cget) Install: out/target/product/sabresd_6dq/system/bin/i2cget Import includes file: out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cset_intermediates/import_includes target thumb C: i2cset <= /home/zengjf/myandroid/external/i2c-tools/tools/i2cset.c target Executable: i2cset (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cset_intermediates/LINKED/i2cset) target Symbolic: i2cset (out/target/product/sabresd_6dq/symbols/system/bin/i2cset) Export includes file: /home/zengjf/myandroid/external/i2c-tools/Android.mk -- out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cset_intermediates/export_includes target Strip: i2cset (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cset_intermediates/i2cset) Install: out/target/product/sabresd_6dq/system/bin/i2cset Import includes file: out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdump_intermediates/import_includes target thumb C: i2cdump <= /home/zengjf/myandroid/external/i2c-tools/tools/i2cdump.c target Executable: i2cdump (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdump_intermediates/LINKED/i2cdump) target Symbolic: i2cdump (out/target/product/sabresd_6dq/symbols/system/bin/i2cdump) Export includes file: /home/zengjf/myandroid/external/i2c-tools/Android.mk -- out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdump_intermediates/export_includes target Strip: i2cdump (out/target/product/sabresd_6dq/obj/EXECUTABLES/i2cdump_intermediates/i2cdump) Install: out/target/product/sabresd_6dq/system/bin/i2cdump make: Leaving directory `/home/zengjf/myandroid' zengjf@zengjf:~/myandroid$ 4. adb push <编译出来的可执行程序> /data/local 六、i2cdetect test: 1. test1: 1|root@android:/data/local # ./i2cdetect -l i2c-3 i2c i2c-gpio3 I2C adapter i2c-0 i2c imx-i2c I2C adapter i2c-1 i2c imx-i2c I2C adapter i2c-2 i2c imx-i2c I2C adapter root@android:/data/local # 2. test2: root@android:/data/local # ./i2cdetect -y -r 2 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: UU -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- 七、i2cget test: 1|root@android:/data/local # ./i2cget -y 1 0x08 0x03 Error: Could not set address to 0x08: Device or resource busy 1|root@android:/data/local # ./i2cget -f -y 1 0x08 0x03 0x21 1|root@android:/data/local #