Oscilloscope | Oscilloscope for Mac/Windows written in OF | Graphics library

I am trying to use scipy.fft to see the noise in my data. The raw data is a electrical signal dataset which collect by oscilloscope.

The primary frequency is 60MHz, The total is 250000 data points(rows) which is 2 sec(in reality). The noise should be all over the place.

The problem is that when I plot it, the xf and yf can't aligned.

ValueError: x and y must have same first dimension, but have shapes (270000000,) and (250000,)

I copied the code from: https://docs.scipy.org/doc/scipy/tutorial/fft.html

It doesn't work well for my dataset, but I am not sure why this happened. My dataset is here: https://drive.google.com/file/d/19HFOIZyfI0rOy2_G-csqtCs7He27LhLg/view?usp=sharing

There are questions that deal with this issue in:

Read CSV into a dataFrame with varying row lengths using Pandas

How to read a no header csv with variable length csv using pandas

However changes to Pandas seem to be deprecating those solutions. If I run this:

I am trying to program an AVR ATTiny13A using a USBasp adapter (guloprog) and avrdude. Uploading the program and running it works fine the first time for a fresh ATTiny13A device, but re-uploading again fails. avrdude cannot see/access the device at all. avrdude behaves like the device is not connected.

I have two signals from an oscilloscope. Each of them has 1000 points with a 1ns step. I need to see the difference between signals. But the signals are shifted by 0.31ns. I can create two plots with aligned signals with the command

I want to implement a simple "GPT" timer that generates an interrupt every 1ms. However, I get an interrupt exactly every 3ms (instead of the desired 1ms).

Where is my error? What values should I set to get a 1ms timer?

Here is my calculation for the GPT timer:

EXPLANATION OF TIMER VALUES:

We take for source clock the PLL1 DIV2 400MHz We define the root divisor at 4 => 400MHz / 4 = 100MHz

100MHz = one increment every 10ns We want an interrupt to be generated every 1 ms

So we have : Output_compare_value = delay_time x GPT_frequency

Output_compare_value = 1 x 10^-3 x (1/(10 x 10^-9)) = 100000

Here is my code (I change the state of a GPIO at each interrupt to check the operation of my timer on the oscilloscope):

So I'm doing a simple oscilloscope in C. It reads audio data from the output buffer (and drops buffer write counter when called so the buffer is refreshed). I tried making simple zero-cross triggering since most of the time users will see simple (sine, pulse, saw, triangle) waves but the best result I got with the code below is a wave that jumps back and forth for half of its cycle. What is wrong?

Signal that is fed in goes from -32768 to 32767 so zero is where it should be.

If you didn't understand what I meant you can see the video: click

Upd: Removed the code unrelated to triggering so all function may be understood easier.

maybe you can give me a hand, I've been looking for all information, in order to solve this problem of mine, but nothing, I can't use the player with cordova ...

in practice I can't load mp3 files, whether they are both locally and remotely, I always get this error: "Error: buffer is either not set or not loaded", the files in the path are there.

I tried using Tone's oscilloscope to see if I was having trouble loading Tone, but this works fine.

Could it depend on some authorization, particular that I might be missing ?.

For example using cordova media plugin I can reproduce the audio, but I need to use Tonejs.

Do you have any ideas, what this might depend on. or what could I try to do? ...

even this simple example, after the device ready does not go:

I have been trying to get SPI master transmit to work using DMA and STM32 LL drivers, on STM32G030C8.

I did get the SPI to work with LL drivers without DMA, so I believe that at least my wiring is correct.

What I have done:

1. Set SPI to use DMA in cubeMX by setting SPI1_TX Request to DMA1 channel 1

2. Setup the transmit in code:

main.c

I am trying to convert an ADC bipolar differential signal in C++. The device I am using is a 12 bit MAX11613 (datasheet) and the microcontroller is a Raspberry PI 3B+. So far I am able to capture values, however the results are not the differential result of AIN0 and AIN1 I would expect.

The device is a 3.3V supply and the input on AIN0 is 0-3.3V. The input on AIN1 is the virtual ground of the incoming signal at 1.65V.

The bipolar transfer function of the device shown below may be my source of confusion. Why is it that a value just under the midrange of 1.65V would produce a value of 0b111111111111 and not 0b100000000001? And if that is actually correct, how does one adjust for that to reflect an actual negative voltage compared to the virtual ground input (AIN1)?

For what it's worth, here's my code:

max11613.h