cro oscilloscope

The last simple introduction of the use of Audiorecord and Audiotrack, this time the combination of Surfaceview to achieve an Android version of the phone analog signal oscilloscope. Recently the Internet of Things is very hot, as a mobile phone software developers, how to do not modify the phone hardware circuit under the premise of integration with third-party sensors it? The microphone is a good ADC interface, through the microphone and third-party

The last time I briefly introduced the use of AudioRecord and AudioTrack, this time I used SurfaceView to implement an Android mobile phone analog signal oscilloscope (PS: I have also talked about the mobile phone oscilloscope OF THE j2_version before ). Recently, the Internet of Things has become very popular. As mobile phone software developers, how can they combine with third-party sensors without modify

This example of oscilloscope includes a PC and a serial port to send messages, it is worth studying.The general idea is that the sensor node collects data, sends one packet to another base node for each 10 data acquisition, and then the base node forwards the data to the PC side. The PC side has a Java program that collects data and displays it. So run this example to two nodes, a burning oscilloscope, a bu

OriginA project under the responsibility of a colleague scans whether something in the hardware exists. Therefore, the boss wants to view the scan results through an image-based interface. Therefore, we made a small tool to read and visualize the data provided by our colleagues. The easiest way to display the scan results is the oscilloscope, but the functions of the third-party controls are too cumbersome. In the end, I decided to make a simple one m

My Android advanced tutorial ------) Android implements music oscilloscope, balancer, bass, and audio field functionsThis example is from crazy Android handout. To implement specific functions, you need to understand the following APIs: MediaPlayer Media Player Visualizer spectrum Equalizer balancer BassBoost bass controller PresetReverb preset sound field controller paintingThe following figure shows the effect.Portrait WaveformBlock WaveformCurve Wa

Use SurfaceView to display the sine curve, simulate the oscilloscope, and surfaceview the sine. As we all know, views are repainted through refresh. The Android system re-painted the screen by sending a VSYNC signal. The interval for refresh is 16 ms, if the view completes all the operations you need within 16 ms, the user will not feel stuck visually. If there are too many operation logics to be executed, especially the interface that needs to be r

Http://jingyan.baidu.com/article/91f5db1bf715c01c7f05e39a.htmlHttp://cn.tek.com/learning/oscilloscope-tutorial?utm_source=Baidu-Success_Eventsutm_medium=cpcutm_ CAMPAIGN=SUCCESS_EVENTS_SUCCESS_EVENTS_CN (S) _SUCCESS_CN_SCOPE_GUIDECOVID=COVTEKBDU81000000009393SUTM _term=cdrsbdu961sHttp://zhidao.baidu.com/link?url=CRYtFiBdcjsiH6fqDHlHkdNAMLJg43NT6HHsUodUsDySGy5aZkIzZ3vHwi7zIfiyPpXVkvgdLF9rnfPqW84mZq1. Later found that the network transformer instability

Zookeeper Let's take a look at the program running in this article (the screen recording speed is slow, and the real machine runs more smoothly ): In this article, the program uses the 8000hz sampling rate, which requires a high real-time performance for the x-axis drawing. If the resolution of the x-axis is not reduced, the program's real-time performance is poor. Therefore, the program reduces the x-axis data range by 8 times ~ 16 times. Because the 16-bit sampling is used, the height of th

Some people used the PC sound card input (microphone hole) to simulate the oscilloscope, but few were implemented using mobile phones. Using MMAPI of j2m's to simulate the oscilloscope, the specific effect is slightly inferior to that of a smart machine, because the smart machine can read the microphone input stream in real time, while j2m's still need a short buffer to constitute a blocking, however, it is

Digital oscilloscope GUI base on SDL. 1. soure code: /* Bring up a window and play with it */ 2. Run on x86: 3. How to Use SDL APIs: 1). sdl_init (sdl_init_video ). Initialize the video devices such as framebuffer, direactfb, X11 or OpenGL etc. 2). Set the video device. Sdl_surface * screen, * window; Screen = sdl_setvideomode (W, H, 32, sdl_swsurface ); 3). Draw some graphic data on the backbuffer (swsurface ). Uint32_t color;Sdl_rect rect;

My Android advanced tour ------> Android implements music oscilloscope, balancer, bass and audio field functions, and android advancedThis example is from the crazy Android handout. To implement specific functions, you need to understand the following APIs: MediaPlayer Media Player Visualizer Spectrum Equalizer BassBoost bass Controller PresetReverb preset sound field controller Painting The following figure shows the effect. Portrait Waveform

HS Series Data acquisition card can not only achieve high-speed data acquisition, but also through the (Multi channel) multi-channel measurement and analysis software, to achieve a variety of complex triggering function of the logic relationship, capture the transient high-speed signal and display the corresponding trigger curve.HS4, HS5, HS6 USB high-speed data acquisition cardVarious advanced triggering functionsIn order to control the USB series high-speed data acquisition card, the acquisiti

tell him whether or not he can ES Cape.Input Specification:Each input file contains the one test case. Each case starts with a line containing the positive integersN(≤100), the number of crocodiles, andd, the maximum distance that James could jump. Thennnlines follow, each Containing The (x, y) location of a Crocodile. Note that no crocodiles is staying at the same position. Output Specification:For each test case, the print in a line "Yes" if the James can escape, or "No" if not.Sampl

"I'm using a _100mhz oscilloscope, including a 100MHz passive probe, and I should be able to measure 90MHz sine waves correctly, right?" Is the oscilloscope or probe broken? ”I used to be able to answer this question with a little common sense, but now I hear this kind of problem sometimes. Then it may not simply be attributed to common sense, especially in most oscilloscopes, where the oscilloscope's "syst

test black box method, from auxiliary analysis, automatic diagnosis, Provide software security testing solutions on multiple levels, such as rapid positioning. TT offers a wide range of functions beyond traditional security white box testing, and with popular fuzzing security testing methods, the efficiency and quality of security testing can be greatly improved.The following is a list of the features that must be detected for software security testing, demonstrating the range of methods that T

new physical layer verification SolutionIn view of the challenges in the test of MB-OFDM system, the company proposed a verification test scheme: In the receiver, using the wide band receiver-oscilloscope in the universal instrument as the signal collection equipment, with specially designed for the MB-OFDM signaling demodulation software TDSUWBWiMedia V2 for Signal Analysis; transmitter, a band can use the latest AWG7102 directly generate, the signa

in the process of software height, we also need to check whether the expected signal level occurs on the chip. For example, when writing a driver, we need to write an I/O port to operate the peripheral chip. When writing the corresponding I/O port, we know that the chip selection signal of the corresponding chip should be effective. Sometimes, we need to verify whether it happened as expected, which requires an oscilloscope. Generally, an

refer to the use of a digital oscilloscope ppt 2015-11-22 21:45:42Note the following points when using:1, set the input signal coupling mode , generally there are 3 kinds of coupling mode, AC (AC coupling), DC (DC coupling), GND (ground). As the first part of the oscilloscope structure (red box on the left)The actual output waveform corresponding to the selection of three coupling modes is posted below2, so

a series of digital signals accumulated on the oscilloscope , the shape of the image is similar to the eye, it is called eye diagram.When using the afterglow oscilloscope to observe the transmitted data signal, the time signal of the measured system is used to control the scanning of the oscilloscope by external triggering or external synchronization, because th

accurately determine whether the code changed by developers affects other functions, the program can only be tested again. However, through reverse tracing, the tester clearly sees the test case table affected by the changed code, and through the cumulative coverage technology, this greatly shortens the regression testing time. ※Shanghai zero one assembly Information Technology Co., Ltd. has a patent for "a test device and method based on case and source code bidirectional traceability ". Real