https://github.com/devel0/iot-arduino-scope

simple oscilloscope opengl using arduino as adc input through usb serial
https://github.com/devel0/iot-arduino-scope

arduino iot linux opengl scope

Last synced: about 2 months ago
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simple oscilloscope opengl using arduino as adc input through usb serial

• Host: GitHub
• URL: https://github.com/devel0/iot-arduino-scope
• Owner: devel0
• License: mit
• Created: 2018-07-28T23:04:36.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2018-08-13T02:54:24.000Z (almost 8 years ago)
• Last Synced: 2025-04-02T00:37:38.415Z (about 1 year ago)
• Topics: arduino, iot, linux, opengl, scope
• Language: C++
• Homepage:
• Size: 1.8 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# arduino-scope

simple oscilloscope opengl using arduino as adc input through usb serial

- Arduino ADC to convert signal to digital, then serial

  - 115kbaud =~ 11.5kb/s ( need at least 2 byte for a freq detect, ie. max freq detectable about 11.5khz/2 )

- C++ opengl program to display waveform

## keys

- *space* : pause display

- *v/V* : decrease/increase vertical factor

- *h/H* : decrease/increase horizontal factor

- *up/down* : delta vertical

- *p* : toggle point mode

- *t* : toggle text info

## flash arduino

- pre: install [arduino ide](https://www.arduino.cc/en/Main/Software)

- open sketch `arduino-scope/arduino-scope.ino` and flash firmware

  - tools/board ( eg. arduino nano )

  - tools/port

  - sketch upload

## debug and execution

- pre: install [vscode](https://code.visualstudio.com/) and suggested c++ extension asked when open the folder

```

code .

```

- breakpoints works thanks to `gdb` debugger ( `-g` switch to gcc - see Makefile )

- tune serial port in `launch.json` "args"

- hit F5 to start

## dev notes

- an ethernet udp branch exists but no increase in freq rate because bottleneck still exists in ADC conversion

## comparision

| freq | sine | square |

|---|---|---|

| 460hz | ![img](doc/sin460hz.png) | ![img](doc/sq463hz.png) |

| 1.57khz | ![img](doc/sin1_57khz.png) | ![img](doc/sq1_58khz.png) |

| 3.26khz | ![img](doc/sin3_26khz.png) | ![img](doc/sq3_23khz.png) |

| 4.44khz | N/A | ![img](doc/sq4_44khz.png) |