asus touch screen driver

3 bits (A2, A1, and A0) Select the current channel for the multiplexer, the touch screen driver, and the reference source input.mode--mode Select bit to set the resolution of the ADC. Mode=0, the next conversion will be a 12-bit mode; mode=1, the next conversion will be 8-bit mode.ser/dfr--bit Control Reference source mode, select Single-ended mode (ser/dfr=1),

1 Overview This task is to debug the touch screen driver on the flykar I. mx 6 quqd sabrelite Development Board. The touch screen chip is goodix's gt828 chip and the touch screen inter

1. Touch Screen calibration principle For more information, see http://blog.sina.com.cn/wyw1976. 2. General Method of touch screen Calibration The following formula is used to implement touch screen correction. XL, yl are the dis

1. CompileVery depressed some time ago... Because an error always occurs when you run the generated calibration program ts_calibrate: Ts_open: Inappropriate ioctol for DeviceAfterwards, I learned that it was the touch screen drive of my own board after numerous twists and turns. Not SupportedIOCTLOperation, Crazy sweat... Recompile tslibCD tslib-1.3 export cc =/usr/local/ARM/2.95.3/bin/ARM-Linux-GCC // spec

A long time ago, in the article "optimization of four-wire resistive touch screen drive", the transformation method of the tcc89 platform touch drive was introduced. Practice has proved that after using this method, the touch screen almost never jumps, achieving the expected

to delete all the compiled target files and re-compile them. In particular, the kernel files are very interesting here ...... I may add this part in subsequent articles. Coming soon !!!! Next let's take a look at the touch screen. The touch screen is divided into XXX points, and XXXX are available ...... Let's give a

* defaulttseventtype = "h3600"; // because my touch screen driver corresponds to this structure.3. modify some code in the getxy function of tests/ts_calibrate.c in tslib source code. As follows:Static int getxy (struct tsdev * ts, int * X, int * Y) {....................................... ........................................ ................................

Qt touch screen driverThe signal related to user input events in QT/Embedded is built on the Interface call to the underlying input device. It is generally implemented through I/O read/write to the device file. Most of these drivers have been encapsulated in the QT library to form the corresponding device driver interfaces, such as the display card

) ev_abs0x03Absolute coordinates (e.g. touch screen and joystick, report absolute coordinate position) Ev_msc0x04Other ev_led0x11LED ev_snd0x12Sound Ev_rep0x14Repeat ev_ff0x15Force FeedbackThe functions used to submit the more commonly used event types to the input subsystem are:voidInput_report_key (structInput_dev *dev, unsignedintCodeint value);//function to submit key eventsvoidInput_report_rel (structI

There are two ways to load a QTE touch screen: (1) loading the QTE touch screen; Pay attention to the following three items: When compiling QTE, in its custom configuration file (located in qtdir/src/tools/qconfig-XXX.h, its XXX is the custom name, this feature word can be specified in-qconfig xxx When configure

Development Board with the touch screen display Chinese characters. However, it has not been tested in other test environments and platforms.On the Chinese character display algorithm (in fact, no algorithm), the steps have been in the previous article said a lot, here no longer mentioned.Since the Autotool has not been researched yet, and Tslib uses this tool to manage the code, it does not know how to ad

Keywords: Android capacitive screen TP work queue interrupt multi-point touch ProtocolPlatform information:Kernel: linux2.6/linux3.0System: Android/android4.0Platform: s5pv310 (Samsung exynos 4210) Author: xubin341719 (You are welcome to reprint it. Please note the author) Reference: http://edsionte.com/techblog/archives/1582For more information, see Android capacitive

The touch screen is summed up as input subsystem, here is mainly for the resistive screen, the use of the process is as follows: When the touch pen is pressed, resulting in an interrupt. Start the ADC conversion x, y coordinates in the interrupt handler function handler. The ADC is terminated, an ADC interrupt is gener

Recently updated sam9263 Angstrom, resulting in a poor touch screen, the performance of the touch is not allowed. Of course, there is a touch calibration when starting. Google, as if the latest x is the use of xorg, can not directly support tslib, to use x xf86-input-tslib driver