2. IKEA 2 http://www.ustream.tv/channel/magorokutv geekbar
http://www.facebook.com/nagoyageekbar 3. applicationAndroid
eventHubSystem server /dev/inputLinux /dev/inputhw 4. Y 0GND,V
V5vX1v,Y4v XX-MAX20%Y-MAX80% X+,X-,Y+,Y- X X-GND,X+VCC,Y- Y
Y-GND,Y+VCC,X- 5. XY ADC ADC Android PMIC drivers/input/touchscreen
6. usbtouchscreen.cstatic int egalax_read_data(struct usbtouch_usb
*dev, unsigned char *pkt){ if ((pkt[0] & EGALAX_PKT_TYPE_MASK)
!= EGALAX_PKT_TYPE_REPT) return 0; dev->x = ((pkt[3] & 0x0F)
y = ((pkt[1] & 0x0F) touch = pkt[0] & 0x01; return 1;static
struct usbtouch_device_info usbtouch_dev_info[] = {} #ifdef
CONFIG_TOUCHSCREEN_USB_EGALAX [DEVTYPE_EGALAX] = { .min_xc = 0x0,
.max_xc = 0x07ff, .min_yc = 0x0, .max_yc = 0x07ff, .rept_size = 16,
.process_pkt = usbtouch_process_multi, .get_pkt_len =
egalax_get_pkt_len, .read_data = egalax_read_data, },#endif 7.
usbtouchscreen.cstatic void usbtouch_process_pkt(struct
usbtouch_usb *usbtouch,unsigned char *pkt, int len){ struct
usbtouch_device_info *type =
usbtouch->type;input_xxxx/dev/inputif
(!type->read_data(usbtouch,
pkt))return;input_report_key(usbtouch->input, BTN_TOUCH,
usbtouch->touch);if (swap_xy)
{input_report_abs(usbtouch->input, ABS_X,
usbtouch->y);input_report_abs(usbtouch->input, ABS_Y,
usbtouch->x);} else {input_report_abs(usbtouch->input, ABS_X,
usbtouch->x);input_report_abs(usbtouch->input, ABS_Y,
usbtouch->y);}if
(type->max_press)input_report_abs(usbtouch->input,
ABS_PRESSURE, usbtouch->press);input_sync(usbtouch->input);}
8. /dev/input/usr/include/linux/input.h /dev/input/eventNopenread
struct input_eventstruct input_event { struct timeval time;// __u16
type; // __u16 code; // __s32 value;//}; 9. #define EV_SYN
0x00#define EV_KEY 0x01#define EV_REL 0x02#define EV_ABS
0x03#define EV_MSC0x04#define EV_SW0x05#define EV_LED 0x11#define
EV_SND0x12#define EV_REP 0x14#define EV_FF0x15#define
EV_PWR0x16#define EV_FF_STATUS0x17#define EV_MAX0x1f#define EV_CNT
(EV_MAX+1) 10. /dev/uinput /dev/input ioctl uinputevent/dev/input
VNC 11. evntHub frameworks/base/libs/ui/EventHub.cpp
frameworks/base/libs/ui/InputReader.cpp 12. EventHub.cppbool
EventHub::getEvent(RawEvent* outEvent) { for (;;) { if
(minputbuffer)const struct input_event& iev =
mInputBufferData[mInputBufferIndex++]; :outEvent->type =
iev.type;outEvent->scanCode = iev.code;: return; }read(pfd.fd,
mInputBufferData,sizeof(struct input_event) *
INPUT_BUFFER_SIZE);int pollResult = poll(mFDs, mFDCount, -1);}} 13.
InputReader.cppvoid InputReader::loopOnce() {RawEvent
rawEvent;mEventHub->getEvent(& rawEvent);process(&
rawEvent);}void InputReader::consumeEvent(const RawEvent* rawEvent)
{int32_t deviceId = rawEvent->deviceId;{ssize_t deviceIndex =
mDevices.indexOfKey(deviceId);InputDevice* device =
mDevices.valueAt(deviceIndex);if (device->isIgnored()) {
//LOGD("Discarding event for ignored deviceId %d.", deviceId);
return;}device->process(rawEvent);}} 14. Input 2.3 2.3
androidraw
