硬件平台：sen_A20
系统版本：Android 4.2.2
内核版本：linux3.3
固件版本：v1.2
电阻屏：17寸 EETIeGTouch （USB）
一、配置内核
(1)配置.config
1. CONFIG_INPUT_EVDEV2. CONFIG_INPUT_UINPUT3. CONFIG_HIDRAW ( for USB Interface )
可以使用make menuconfig ARCH=arm命令选中：
< * > Event interface
< * > User level driver suport
–HID Devices
< * > /dev/hidraw raw HID device support
(2)检查是否被选中
CONFIG_INPUT_EVDEV=yCONFIG_INPUT_UINPUT=yCONFIG_HIDRAW=y
二、修改驱动代码：
1、
1. /SourceCode/drivers/input/evdev.c 添加
static bool evdev_match(struct input_handler *handler, struct input_dev *dev){/* Avoid EETI USB touchscreens */#define VID_EETI 0x0EEFif ((BUS_USB == dev->id.bustype) && (VID_EETI == dev->id.vendor))return false;return true;}
static struct input_handler evdev_handler = {.event = evdev_event,.match = evdev_match, /* Added by EETI*/.connect = evdev_connect,.disconnect = evdev_disconnect,.fops = &evdev_fops,.minor = EVDEV_MINOR_BASE,.name = "evdev",.id_table = evdev_ids,};
2. /SourceCode/drivers/input/mousedev.c
static bool mousedev_match(struct input_handler *handler, struct input_dev *dev){/* Avoid EETI USB touchscreens */#define VID_EETI 0x0EEFif ((BUS_USB == dev->id.bustype) && (VID_EETI == dev->id.vendor))return false;/* Avoid EETI virtual devices */if ((BUS_VIRTUAL == dev->id.bustype) && (VID_EETI == dev->id.vendor))return false;return true;}
static struct input_handler mousedev_handler = {.event = mousedev_event,.match = mousedev_match, /* Added by EETI */
.connect = mousedev_connect,.disconnect = ousedev_disconnect,.fops = &mousedev_fops,.minor = MOUSEDEV_MINOR_BASE,.name = "mousedev",.id_table = mousedev_ids,}
3. /SourceCode/drivers/input/joydev.c
static bool joydev_match(struct input_handler *handler, struct input_dev *dev){/* Avoid touchpads and touchscreens */if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit))return false;/* Avoid tablets, digitisers and similar devices */if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit))return false;/* Avoid EETI virtual devices */#define VID_EETI 0x0EEFif (( BUS_VIRTUAL == dev->id.bustype) && (VID_EETI == dev->id.vendor))return false;return true;}static struct input_handler joydev_handler = {.event = joydev_event,.match = joydev_match,.connect = joydev_connect,.disconnect = joydev_disconnect,.fops = &joydev_fops,.minor = JOYDEV_MINOR_BASE,.name = "joydev",.id_table = joydev_ids,};
三、编译内核、系统，将固件烧写到板子上（用串口工具查看）
1、在终端输入“cat /proc/bus/input/devices“
2、将厂商携带的文件放到android目录下：
厂家提供有四个文件：
a) eGTouchD:a daemon service driver for EETI touch controller.b) eGTouchA.ini :a parameter list could be loaded by driverc) eGalaxTouch_VirtualDevice.idc:a file necessary for Android 3.0 upwardsd) eGalaxCalibrator:a tool provides calibration and line drawing.
（1）将eGTouchD放到 system/bin目录下，并修改init.rc文件
添加： service eGTouchD /system/bin/eGTouchDuser rootgroup rootoneshot
（2）将eGalaxTouch_VirtualDevice.idc放到system/usr/idc目录下
（3）将eGTouchA.ini文件放到/data目录下：
*为了方便，我们可以将这三个文件放在device\softwinner\sugar-ref001目录下：通过配置sugar-ref001.mk将文件移动到相对于的位置。编译烧写即可
这里要详细说明下：在文件系统启动的时候eGTouchD这个文件会检测data目录下是否有这个文件，如果没有就自动创建，而系统自动创建的这个文件跟自己配的有所差异
，这是厂商的一个BUG，我们可以在文件系统加载的时候，同时也启动这个文件，不让他自动生成。
首先，在device\softwinner\sugar-ref001\sugar-ref001.mk添加：
PRODUCT_COPY_FILES += \device/softwinner/sugar-ref001/eGTouchD:system/bin/eGTouchD\device/softwinner/sugar-ref001/eGalaxTouch_VirtualDevice.idc:system/usr/idc/eGalaxTouch_VirtualDevice.idc\device/softwinner/sugar-ref001/eGTouchA.ini:data/eGTouchA.ini\
朋友，为了幸福，请你保持一副热爱生活的心肠，
