planar touch screen drivers

. Hardware-related Operations *//* 4.1 Enable clock (clkcon[15]) */CLK = Clk_get (NULL, "ADC");Clk_enable (CLK);/* 4.2 Set S3C2440 's adc/ts register */S3c_ts_regs = Ioremap (0x58000000, sizeof (struct s3c_ts_regs));/* BIT[14]: 1-a/d converter Prescaler Enable* Bit[13:6]: A/D converter prescaler value,* adcclk=pclk/(49+1) =50mhz/(49+1) =1mhz* Bit[0]: A/D conversion starts by enable. First set to 0*/S3c_ts_regs->adccon = (1REQUEST_IRQ (IRQ_TC, PEN_DOWN_UP_IRQ, Irqf_sample_random, "Ts_pen", NULL);

Linux (kernel 3.2.x), based on the Eeti Touch screen controller, USB touch screen application, found that the USB touch cable unplugged and plugged in, touch screen failure, the

touch screen controller will automatically control the touch screen interface to open or close each MOS tube, collect the X and Y coordinate data of the touch screen in sequence. Figure 1 circuit diagram of 4-wire resistive

Microsoft Corporation. Last updated on Tuesday, May 18,200 4 Touch screen driver SamplesSample Code for touch screen drivers is provided in the following directories: % _ Winceroot %/platform/xsc1bd/Drivers/touchp % _ Wincero

, provides open, read, write, close and other system calls. We only need to perform operations on serial devices like operating common data files, and send the touch screen coordinate data to the upper-layer QT/embedded application layer. 3. QT touch screen driverThe signal related to user input events in QT/Embedded i

Msg2133 touch screen (TP source code learning) Note: The following devices refer to touch screens. ABS: absolute value 1. Introduction to the input subsystem Linux input devices include buttons, keyboards, touch screens, mouse, and joystick. They are character devices, and the Linux kernel abstracts the commonality o

two display drivers, depending on the display size, resolution and cost.In addition, there are two different types of LCD technology, the most common is In-plane switching (IPS), vertical alignment (VA), Twisted nematic (TN). How they are arranged in liquid crystal (LC) has a completely different structure, depending on what features you like to enhance in your product. One example of the compromise scenario is that the OEMs needs to involve the LC (

, btn_right, btn_middle, btn_back, btn_side, btn_forward, btn_extra, btn_stylus, btn_stylus2: (optional): Report button status Btn_tool_finger, btn_tool_pen, btn_tool_rubber, btn_tool_brush, crop, btn_tool_airbrush, btn_tool_mouse, crop, btn_tool_quadtap: (optional) report tool type 4) if the single-point touch and multi-point touch axes are defined, only the Multi-Point Protocol axes are used, and the s

preceding steps, any sampling data is passed to the callback function defined by touchpanelenable. the driver can transmit calibrated coordinates or un-calibrated coordinates to the callback function. if the driver has an effective calibration algorithm, the calibrated coordinates can be returned. if the algorithm is complex, the UN-calibrated coordinates can be returned to avoid calculation in the high-priority driver thread. Instead, the calculation is performed by the lower-priority driver c

msg2133 touch screen (TP source code learning)Emphasis: The following device refers to the touch screenABS: Absolute Value1. Introduction to the input subsystemLinux The total type of input device is complex, common include keys, keyboards, touch screen, mouse, rocker and so

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from: http://blog.chinaunix.net/uid-22030783-id-3023527.htmlThe kernel comes with s3c2440 touch-screen controller driver, which is the driver of input subsystem, the touch screen driver needs the support of ADC driver, the touch screen