1.DdsiTouchPanelAttach和DdsiTouchPanelDetach
DLL entry進入或結束執行,這裏不需要任何工作,直接返回0
LONG DdsiTouchPanelAttach(void)
{
return 1;
} This function executes when the MDD's DLL entry point gets a DLL_PROCESS_ATTACH message.
LONG DdsiTouchPanelDetach(void) { return 0; }
This function executes when the MDD's DLL entry point receives a DLL_PROCESS_DETACH message.
2.DdsiTouchPanelEnable
DdsiTouchPanelEnable使能觸摸屏並進行相應的初始化工作等。
3.DdsiTouchPanelDisable
對應的就有DdsiTouchPanelDisable函數,將DdsiTouchPanelEnable申請的資源進行釋放.屏蔽中斷.
4.DdsiTouchPanelSetMode
DdsiTouchPanelSetMode用來設置觸摸屏的採樣率週期.函數傳入TPSM_SAMPLERATE_LOW_ID或TPSM_SAMPLERATE_HIGH_ID來進行相應的設置.這裏只有一個採樣率週期,所以函數不做實際工作.
5.DdsiTouchPanelPowerHandler
DdsiTouchPanelPowerHandler用來通知驅動系統正進入或離開掛起狀態.
參數bOff爲TRUE表明系統正在關閉, FALSE表明系統正在開啓.
6.DdsiTouchPanelGetDeviceCaps
DdsiTouchPanelGetDeviceCaps用來查詢觸摸屏設備的性能參數.
iIndex可能爲以下3個參數:
TPDC_SAMPLE_RATE_ID: 返回採樣週期,這裏TSP_SAMPLE_RATE_LOW,TSP_SAMPLE_RATE_HIGH,
TPDC_CALIBRATION_POINT_ID:返回需要校準點的XY座標.校準點座標索引在PointNumber(lpOutput傳遞的結構成員).調用
7.DdsiTouchPanelGetPoint來獲得.這點分別位於四個角和中間,也就是我們調用觸摸屏校準程序時會調用到的函數.
TPDC_CALIBRATION_POINT_COUNT_ID:返回用來校準觸摸屏的校準點數目.這裏的數目設置爲5.
8. DdsiTouchPanelPowerHandler
As with all power-down handlers, this function cannot call functions in
other DLLs, memory allocators, debugging output functions, or do anything
that could cause a page fault. This routine is called by the MDD.
9. DdsiTouchPanelSetMode
This function sets information about the touch screen device.
DEF:
LIBRARY touch
LIBRARY touch
EXPORTS
TouchPanelGetDeviceCaps
TouchPanelEnable
TouchPanelDisable
TouchPanelSetMode
TouchPanelReadCalibrationPoint
TouchPanelReadCalibrationAbort
TouchPanelSetCalibration
TouchPanelCalibrateAPoint
TouchPanelPowerHandler