accelerometer calibration

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Windows Phone accelerator (5)

There is an accelerator in Windows Phone. We can use the accelerator to get the user's mobile phone status and adjust our programs based on the mobile phone status, which will be more user-friendly; the Windows Phone accelerator uses three-axis coordinates to locate the coordinates in three-dimensional space. The points (x, y, z) in the three-dimensional space are vector, including the size and direction, the direction is the point (x, y, z) from the origin point (0, 0) to the three-dimensional

Several links under the cocoa touch layer -- coremothion

Introduction and use of the Core Motion framework in ios4 As a person who has just been learning iPhone programming for a week, the purpose of writing this article is not to enlighten the industry, but to summarize the knowledge. It would be better to attract you to give me lessons. The basic content of this article is written in reference to session 2010: sensing device motion in ios4 on WWDC 423, and the development documentation event handling guide for iPhone OS: Motion Events. Of course, I

Idle detection for Windows Phone/system idle Detection

Silverlight applications that disable application idle Detection If your Silverlight for Windows Phone application disables application idle detection to run under the lock screen, you should perform the following tasks to reduce your application's power consumption while the lock screen is engaged. Implement the obscured event handler of the application's root phoneapplicationframe object. this event is raised when the lock screen is engaged or when some other action obscures the running

Cocos2d-x event distribution mechanism-accelerating meter event listening

Event monitoring mechanism In the previous article introduced the cocos2d-x touch event mechanism, this to introduce the next game is also often used in the accelerator events, these are the game is often used. An important input source on a mobile device is the device direction. Most devices are equipped with an accelerometer to measure the gravity direction of the device when it is still or at a constant speed. Gravity sensing comes from a mobile ac

Tpyboard V102: STM32 Development Board capable of running Python

Recently Micropython language hardware programming is very fire, followed by the start to support the development of Micropython language programming board also started fire hot, today small series on and we introduce a very classic Micropython Development Board-tpyboardv102 Development Board.  A Onboard Hardware Resources IntroductionIn accordance with the Convention to introduce a hardware composition of the Development Board, the personal feel that the performance of the development Board is

Basic knowledge of Linux device drivers __linux

release of an action. The touch screen sends an absolute coordinate event (Ev_abs) and a triple group of X, Y, and touch pressure, and the mouse sends a relative motion event (Ev_rel). The accelerometer ADXL346 can send key events about Tanzhen or double vibrations while sending an absolute coordinate event on the acceleration. In some applications, it is also significant that the accelerometer ADXL346 gen

Correction of Touch Screen in Android system -- http://carvencao.blog.sohu.com/156057534.html

From the perspective of the correction method,AndroidSystem touch screen calibration is generally divided into two types: Linear Calibration and three-point (usually five points) calibration; from the calibration position, there are also two types, the driving layer calibration

Windows CE touch screen (touchpanel) driver analysis (1)-principle and driving Architecture

The Touch Screen driver reads user input from hardware and then converts it into a touch event and sends it to GWES. at the same time, convert the coordinates of the calculated coordinates to the calibrated coordinates. calibration coordinates compensate for hardware exceptions, such as touch Skew and non-linear order.When the touch screen driver works properly, the touch point must be provided when the user uses the touch action. When the touch ends,

Floating Point to fixed point operation

said that the DSP chip itself is powerless. Does it mean that the DSP chip cannot process various decimals? Of course not. The key is that the programmer determines which of the 16 decimal places of a number. This is the number calibration.By setting different decimal places in the 16-digit range, the decimal places of different sizes and different precision can be expressed. There are two types of data calibration: Q representation and s representat

The MSP430 library operates ad7708 through SPI

port to perform operations on P1 and P2. They extend the I/O interface capabilities of single-chip microcomputer. Both the analog power supply and Digital Power Supply of ad7718 can be powered by + 3 V or + 5 V respectively. But must be consistent, either with + 3 V or with + 5 V. Ad7708 and ad7718 are controlled and configured through a set of In-chip registers. The first of these registers is the communication register, which is used to control all operations of the converter. For all commun

Introduction to Envisat satellite and ASAR data

(mid-resolution image) ASAAPS1P (complex image)Bandwidth modeASAWS0P (bandwidth mode)ASAWSM1P (standard image)Global Monitoring modelASAGM0P (Global monitoring mode)ASAGMI1P (image)Wave modeASAWV0P (wave mode)AsaWVI1P (fine image) AsaWVS1P (complex image)Level 0 Products: This level of product is reformatted, time-stored satellite data, for the lowest level of Envisat PDS products, from the original data, can be processed in any other software, mainly for the testing of SAR processors, or the e

Efficiency source Seagate 7200.10 HDD Class F Repair Tutorial

can see that the current state of the hard disk is under the F-level. And you can err on the wrong note a6:appCode knows that the app code for the hard drive is incomplete. In the future, many F-class hard drives can use error codes to determine the cause of the problem preliminarily. For example err A5 the same is the app error, but this error is different from the previous one, this means that the app checksum is not correct. This is mostly the code checksum of the ROM and app does not match.

Mastering OPENCV CH4:SFM Details (i)

The structure is restored from the motion so that the image geometry can be extracted better by moving the camera. In order to use monocular cameras, a discrete and sparse set of video frames, rather than continuous video streams, is used in the book. This provides ease of pairing in the back 22 loop combination. Main content:1: Estimate the motion posture of the camera from two images.2: Refactoring the scene3: Refactoring from view4: Refactoring Refinement5: Visualize three-dimensional point c

DDR parameter settings for the I.MX6 Development Board-Schindler

the DDR Stress Test Tool provides two purposes. First, it can be used to calibrate the DDR3 so that the MMDC PHY delay settings and PCB are paired to achieve the best dram new energy. The whole process is fully automated, so customers can get their DDR3 working in a short period of time. In addition, the tool can run memory stress tests to verify the functionality and reliability of the DDR3. Stress tests can be used to verify hardware connections, MMDC register parameters, and DDR3 mode registe

STM32 Learning Note 9 (Systick tick clock)

processor). However, the specific source of STCLK is determined by the chip designer, so the clock frequency between the different products may vary greatly, and you need to examine the device Manual of the chip to decide what to choose as the clock source. (Know why I'm looking for St's instructions on Systick). part of the content belongs to nvic control section, total stk_csr, 0xe000e010-- control register stk_load, 0xe000e014-- Reload Register stk_val, 0xe000e018-- current val

Use ts_calibrate to calibrate the touch screen

From http://www.qqread.com/linux/2010/01/u487324.html The ts_calibrate calibration touch screen provided by the ts_lib package is very simple and practical, but there are two problems in the xsever-based GUI application environment. 1. After calibration, you must restart X for the application to take effect. In this way, the user cannot accept it, because it is time-consuming to start a machine. 2. When the

Efficiency source Seagate Hard Drive bad road repair process

If the module is normal, but more bad, you can start from level 02 automatic calibration (self-test). Risk: ATA module will be lost, (K8k9k10 will also lose the app module) after running, to write back the original disk ATA firmware and app module. If the bad way is not much, you can start the calibration from Age26 or Age30, Age31, and not destroy the ATA Run normal to AGE=50 will stop (many are abnorma

Opencv for iOS Study Notes (6)-mark detection 3

position marked in a three-dimensional space is associated with its projection matrix as follows: P = A * [R | T] * m; Where: M indicates a three-dimensional vertex. [R | T] indicates a [3 | 4] Euclidean matrix. A Indicates a camera matrix or inherent matrix parameters. P: projection of m in screen space After we complete the mark detection, and obtain the Four Corner Points (screen space projection) of the two-dimensional space ), in the next step, we need to obtain the matrix and M vector

I. MX6 DDR parameter settings, I. mx6ddr parameter settings

I. MX6 DDR parameter settings, I. mx6ddr parameter settingsThe DDR Stress Test Tool provides two purposes. First, it can be used to calibrate DDR3 to facilitate mmdc phy delay settings and PCB pairing to achieve the best DRAM performance. The entire process is fully automated, so customers can work with DDR3 in a short period of time. In addition, this tool can run a memory stress test to verify the functionality and reliability of DDR3. Stress testing can be used to verify the hardware connecti

I. MX6DDR parameter settings

I. MX6DDR parameter settingsThe DDR Stress Test Tool provides two purposes. First, it can be used to calibrate DDR3 to facilitate mmdc phy delay settings and PCB pairing to achieve the best DRAM performance. The entire process is fully automated, so customers can work with DDR3 in a short period of time. In addition, this tool can run a memory stress test to verify the functionality and reliability of DDR3. Stress testing can be used to verify the hardware connection, MMDC register parameters, a

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