iio oscilloscope

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

For the stm32 oscilloscope, there are a lot of online channels. I want to express my design ideas here. This project has been prepared for a long time. First of all, I would like to thank the previous team. I feel that Chen Shi and Yu have received many considerations from two experienced embedded engineers. If it is not for work adjustment or other reasons, it is very likely that the product will come out. However, I am deeply sorry for not finishing

In the measurement process, the high waveform capture rate is very important for the oscilloscope.Improves the ability of the oscilloscope to capture random events and low probability events. Before describing the waveform capture rate, you must first understand the concept of dead time. What isDead Zone Time? That is, the sum of the next collection and data processing time triggered by the oscilloscope

1.1GS/S refers to the sampling rate of the oscilloscope, the front s is the meaning of sample sampling, followed by S is the second, that is, the oscilloscope sampling 1G points A second, 1G is 10 of 9 square. That is, a single ad sample can be completed within 1ns.2. Transducers with high input impedance are usually selected, and the probes are divided into active and passive. The application is more passi

Oscilloscope is in the university when the teacher taught, but out of work has not been used, and gradually forget, and now learn again. Look at the effect chart: Here is a custom histogram, and then there is a button, click the button, where the pillars will keep moving, similar to the music player in the oscilloscope beat. Similar to the previous custom view, rewrite the onsizechange () method and th

Weekend play a little Hi, did not update the blog, today to make up, this oscilloscope is in the university when the teacher taught, but out of work has not been used, and gradually forget, and now learn again. Look at the effect chart: Here is a custom histogram, and then there is a button, click the button, where the pillars will keep moving, similar to the music player in the oscilloscope beat. Simil

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

The previous simple introduction of the Android program in the development of the use of Audiorecord and Audiotrack, this time combined with 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 interfac

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

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

"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

applications. It is released under mit by default. 2. iio engine: open-source interactive application framework for HTML5 The iio engine (pronounced "Ee-oh") is a broad application framework that helps create and schedule HTML5 applications. The Framework provides sdks with rich functions, an advanced debugging system, and a cross-platform scheduling engine. The engine is independent and can be used with