oscilloscope | An oscilloscope for python

 by   scientifichackers Python Version: v0.0.4 License: MIT

kandi X-RAY | oscilloscope Summary

kandi X-RAY | oscilloscope Summary

oscilloscope is a Python library. oscilloscope has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can download it from GitHub.

An oscilloscope for python that just works
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              oscilloscope has a highly active ecosystem.
              It has 23 star(s) with 4 fork(s). There are 3 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 2 open issues and 5 have been closed. On average issues are closed in 146 days. There are 5 open pull requests and 0 closed requests.
              It has a positive sentiment in the developer community.
              The latest version of oscilloscope is v0.0.4

            kandi-Quality Quality

              oscilloscope has no bugs reported.

            kandi-Security Security

              oscilloscope has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              oscilloscope is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              oscilloscope releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed oscilloscope and discovered the below as its top functions. This is intended to give you an instant insight into oscilloscope implemented functionality, and help decide if they suit your requirements.
            • Run a function on a zproc
            • Refresh bounds
            • Normalize the input value
            • Calculate norm factor
            • Build the distribution
            • Print status
            • Draw cpu usage
            • Draw the plot
            • Adjust y limits
            • Adjust y - axis limits
            • Shift axes by x
            • Draw the current memory usage
            • Draw an increasing signal
            • Visualize the total CPU
            • Generates a random signal
            • Simple random signal
            • Sends a random signal
            • Start the plot
            Get all kandi verified functions for this library.

            oscilloscope Key Features

            No Key Features are available at this moment for oscilloscope.

            oscilloscope Examples and Code Snippets

            No Code Snippets are available at this moment for oscilloscope.

            Community Discussions

            QUESTION

            How to see voltage wave in simulink/simscape?
            Asked 2021-May-10 at 20:03

            I'm analyzing the bahaviour of a RLC circuit and I need to observe the voltage and current wave of the circuit but I cannot find a way to do this. I need something like an oscilloscope but the scope does not work with the elements i am working with. What can I do?

            The link below is my circuit, I'm using Simscape/Foundation Library elements

            This is my circuit

            ...

            ANSWER

            Answered 2021-May-10 at 20:03

            Simscape and Simulink has different domains. To be able to use each one in the other domain, you need to use Simulink-PS Converter or PS-Simulink converter.

            In that example, you have voltage sensor in Simscape and Scope or display in Simulink. To be able to connect them use PS-Simulink Converter.

            Source https://stackoverflow.com/questions/67448533

            QUESTION

            Alsa records double speed
            Asked 2021-Apr-23 at 15:22

            Disclaimer : I posted for the same issue (with a different point of view) here

            I use a SPH0645 I2S microphone with a custom driver.

            It seams properly recognized by alsa :

            ...

            ANSWER

            Answered 2021-Apr-23 at 15:22

            I found the solution and posted it on my initial post on the nxp forum.

            The error was in the driver :

            Source https://stackoverflow.com/questions/66905698

            QUESTION

            Speed up "charts_flutter" LineChart Rendering
            Asked 2021-Apr-19 at 03:20

            I am currently working on a flutter app that will plot data from a BLE device in real-time on a line chart (where the data will be displayed in an oscilloscope style format). As a place holder for the live BLE data, I am using a timer callback to generate and plot a sine wave with the "charts_flutter" package. So far everything seems to be working. However, it seems like the chart rendering struggles to keep up when the update period is less than 500ms (for example, setting it to 200ms causes everything to freeze up). Before I start experimenting with different packages, I'd like to see if anyone has tips or suggestions to try to speed things up. It is possible that I'm just doing something wrong with state management etc. since I'm not that experienced with flutter. The code is pretty short so I've included both project files below. Thanks.

            main.dart

            ...

            ANSWER

            Answered 2021-Apr-19 at 03:20

            I came to the conclusion that "charts_flutter" was simply not intended for real-time data. I ended up writing my own oscilloscope widget by extending custom painter and it has no noticeable performance issues.

            Source https://stackoverflow.com/questions/66740793

            QUESTION

            STM32F405 bare metal spi slave - MISO data messed up sometimes
            Asked 2021-Mar-26 at 09:46

            I've set up two STM32 Boards, one as SPI-master, the other one as slave. I write directly to registers without any framework. Master to slave communication is working perfectly. But the slave sends garbage sometimes.

            I first tried interrupts, but the slave would always send garbage and often receive garbage. Now I implemented DMA. This is working way better, the slave now always receives correct data. But sending is still an issue.

            If the transmission is 3 to 5 Bytes long the data from the slave is correct in 95% of all cases. If the transmission is longer then 5 bytes, then after the 4th or 5th byte there is just random byte foo. But the first 4 bytes are nearly (95%) always correct.

            The signals are clean, I checked them with an oscilloscope. The data which the master receives shows up properly on MISO. So I guess the slave somehow writes garbage into the SPI DR, or the data register gets messed up. I know SPI slaves on non-FPGAs are tricky, but this really is unexpected...

            Anyone can point me a direction? I'm desperate and thankful for any bit of advice.

            This is the code

            ...

            ANSWER

            Answered 2021-Mar-26 at 09:46

            So, I did it. It was a whole bunch of things. Also, my assumption in the question was wrong. My slave did not receive/send valid data.

            1. The signals were shown as clean by the oscilloscope, but the scope itself was adding noise to the lines, that was not visible on the scope itself. Not measuring the lines helped.

            2. I put 100 OHM resistors close to the MASTER pins. This was not working, out of desperation I put the resistors close to the slave instead. Suddenly I got valid data. (This has been the main culprit all along)

            3. According to the comment of Ashley Miller, I implemented a circular buffer, where I always send a fixed length every time. So the slave knows exactly what to expect. This mitigated eventual errors that could be produced when switching off / resetting the DMA shortly after the transmission.

            4. The UART tricked me also. When getting too much data at once ( as little as 20 or 30 bytes! ) my terminal program gliched and threw the bytes randomly around. So part of the problem was just that... I'm using GtkTerm for those who are interested.

            5. The Clock mode CPOL= 0 and CPH = 0 doesn't work at all. I set both master and slave to the same setting and it just received garbage. If I loop back the master to itself (connect MISO to MOSI a.k.a. exclude the slave) then it works regardless of clock mode. This seems to stem from a timing issue, where the slave has to react too fast and can't handle even the slowest possible speed (approx. 100 kHz). I did not go into details on this.

            I hope I could help someone with this.

            Source https://stackoverflow.com/questions/66679047

            QUESTION

            PyVISA not listing USB instrument on Linux
            Asked 2021-Mar-04 at 17:59

            I am trying to communicate with a LeCroy WaveRunner 640Zi oscilloscope from a Raspberry Pi, they are connected with a USB cable. I have already done this under Windows, but now I am not able to make it work in Linux.

            If I run lsusb I see this:

            ...

            ANSWER

            Answered 2021-Mar-04 at 17:59

            I managed to find a solution which I share for the sake of future generations to come. I had just to add a line to the file /etc/udev/rules.d/99-com.rules with the content SUBSYSTEM=="usb", MODE="0666", GROUP="usbusers" (or append this line in case the file already exists). This can be done first running

            Source https://stackoverflow.com/questions/66480203

            QUESTION

            How to save 1 million point trace from oscilloscope using PyVISA
            Asked 2021-Mar-02 at 16:42

            I am trying to implement some code from this old tutorial from 2015 (which is using a VERY old version of PyVISA, so everything is different now):

            ...

            ANSWER

            Answered 2021-Mar-02 at 13:02

            The scope you are using "Rigol DS1104Z" has different SCPI commands to the "Rigol DS1052E" in your example code.

            The command ":WAV:POIN:MODE RAW" will work on the Rigol DS1052E but not on the Rigol DS1104Z

            You can check if the instrument has an error by querying ":SYSTem:ERRor?"

            Source https://stackoverflow.com/questions/66432540

            QUESTION

            Why is my triangle white in OpenGL ES 3 on Raspberry Pi
            Asked 2021-Mar-01 at 14:17

            I have a very simple example of a OpenGL ES program that I'm trying to get to run on RaspiOS Desktop (a.k.a. Raspbian) on Raspberry Pi 4.

            My goal is very simple - to draw a red triangle in the center of the screen. However, the triangle comes out as white instead of red.

            I've searched and tried everything and wasn't able to find any help. I'm very frustrated at this point because this was just supposed to be the first tutorial to introduce the world of OpenGL ES and I'm already stuck and can't continue with more complicated examples.

            Anyway, here's the full example

            ...

            ANSWER

            Answered 2021-Mar-01 at 14:17

            Nvm, turns out I'm an idiot.

            This entire time it was a simple typo in buildShader() function. Here's the fixed version of that function:

            Source https://stackoverflow.com/questions/66422048

            QUESTION

            How to read a rotary encoder with interrupts on ESP32 and global flags
            Asked 2021-Feb-27 at 23:03

            When using interrupts, any kind of digitalRead should be obsolete, or so i think. Let me explain my understanding of this to show my problem:

            Say, a quadrature incremental rotary encoder (RE) is pulled up on both signal pins and is therefore idle HIGH. If i configure an interrupt service routine (ISR) on the falling edge on both pins and have the ISR for pin B do nothing more than set the flag "flag_B" to false (representing the logic state at the pin) and the ISR for pin A sets or resets a flag "flag_clockwise" depending on the state of flag_B during A's ISR, then i should get the right direction for every turning step, right? My only task is to then set the state of pin B to high again after the ISRs and my code should be ready for the next interrupt. But that doesn't work, with many random cases of the wrong direction being displayed or showing counter clockwise on the first half of the turning step when you can feel a little "bump" while turning the knob and then going clockwise on the second half, when the shaft has completed a single step, basically performing two opposite actions while only turning one step. Is my logic flawed? All signals are debounced in hardware and look like expected on the oscilloscope.

            ISRs:

            ...

            ANSWER

            Answered 2021-Feb-27 at 23:03

            Even if the pin is assigned as interrupt, you can still use digitalRead() to determine the direction. For example:

            Source https://stackoverflow.com/questions/66388689

            QUESTION

            Raspberry PI 3 UART0 Not Transmitting (Bare-Metal)
            Asked 2021-Feb-27 at 01:23

            Introduction

            I have been working on writing my own bare metal code for a Raspberry PI as I build up my bare metal skills and learn about kernel mode operations. However, due to the complexity, amount of documentation errors, and missing/scattered info, it has been extremely difficult to finally bring up a custom kernel on the Raspberry PI. However, I finally got that working.

            A very broad overview of what is happening in the bootstrap process

            My kernel loads into 0x80000, sends all cores except core 0 into an infinite loop, sets up the Stack Pointer, and calls a C function. I can setup the GPIO pins and turn them on and off. Using some additional circuitry, I can drive LEDs and confirm that my code is executing.

            The problem

            However when it comes to the UART, I have hit a wall. I am using UART0 (PL011). As far as I can tell, the UART is not outputting, although I could be missing it on my scope since I only have an analog oscilloscope. The code gets stuck when outputting the string. I have determined through hours of reflashing my SD card with different YES/NO questions to my LEDs that it is stuck in an infinite loop waiting for the UART Transmit FIFO Full flag to clear. The UART only accepts 1 byte before becoming full. I can not figure out why it is not transmitting the data out. I am also not sure if I have correctly set my baud-rate, but I don't think that would cause the TX FIFO to stay filled.

            Getting a foothold in the code

            Here is my code. The execution begins at the very beginning of the binary. It is constructed by being linked with symbol "my_entry_pt" from assembly source "entry.s" in the linker script. That is where you will find the entry code. However, you probably only need to look at the last file which is the C code in "base.c". The rest is just bootstrapping up to that. Please disregard some comments/names which don't make sense. This is a port (of primarily the build infrastructure) from an earlier bare-metal project of mine. That project used a RISC-V development board which uses a memory mapped SPI flash to store the binary code of the program.:

            [Makefile]

            ...

            ANSWER

            Answered 2021-Feb-25 at 06:27

            My suggestion:

            • flash your SD card to a rpi distribution to make sure the hardware is still working
            • if the hardware is good, check the difference of your code with the in-kernel serial driver

            Source https://stackoverflow.com/questions/66361843

            QUESTION

            how much trigger voltages for STM32F103 rising falling edge triggered interrupts are?
            Asked 2021-Feb-03 at 18:21

            I'm a little confused about the trigger voltage for rising-falling triggered interrupts. As my previous understanding, the trigger voltage should be Vih and Vil. But some one told me Vih and Vil is not for edge triggered interrupts. The thing is, when I observe the waveform with a Oscilloscope along with an interrupt counter from Keil, I did see the interrupt happened when the voltage did not reach the Vih(rising edge). I use 3.3V voltage. The signal is only 1V around and the interrupts was triggered. I checked the manual of STM32 and did not find the answer.

            Could some one help?

            Thanks,

            ...

            ANSWER

            Answered 2021-Feb-03 at 18:21

            The levels are the same whether you are using an interrupt or polling.

            VIH min is the minimum voltage that is guaranteed to be interpreted as a high, and VIL max is the maximum input that is guaranteed to be interpreted as a low.

            Any voltage between these two levels could be interpreted either way.

            As well as that, there isn't a single changeover voltage because the inputs have schmitt triggers with at least 200mV of hysteresis.

            To guarantee to not trigger the rising edge you need to stay below VIL max, which at 3.3V is 1.155V.

            Source https://stackoverflow.com/questions/66020580

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install oscilloscope

            MIT Licence Python 3.6+ only.

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