https://github.com/mattvenn/crap-o-scope

crap-o-scope scope implementation for icestick
https://github.com/mattvenn/crap-o-scope

Last synced: about 2 months ago
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crap-o-scope scope implementation for icestick

• Host: GitHub
• URL: https://github.com/mattvenn/crap-o-scope
• Owner: mattvenn
• License: gpl-2.0
• Created: 2018-05-04T18:43:34.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2018-06-01T13:54:30.000Z (almost 7 years ago)
• Last Synced: 2025-04-01T18:09:53.700Z (about 2 months ago)
• Language: Verilog
• Homepage:
• Size: 2.19 MB
• Stars: 20
• Watchers: 3
• Forks: 6
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# crap-o-scope

![scope](scope.jpg)

I'm building a 6bit colour vga board for our FPGA work group. This started off as a test program but 

I got carried away and built a very poor scope instead.

uses 1092 of 1280 tiles on the ICE40H1k (IceStick) and 12 of 16 block rams.

## spec

* VGA display: 640 x 480 in glorious 6 bit colour!

* 10bit ADC clocked from the VGA clock - results in 1.5MHz sample rate

* 600 sample depth storage!

* graphical display of trigger level

* numerical display of sample level, number of triggers etc.

## design overview

graphics modules split up into:

* vga.v generator from my virtual graffiti project: https://github.com/mattvenn/fpga-virtual-graf

* color_sq.v for drawing a 2 colour bar graph 

* grid.v for the reticule

* numbers.v for the display of the 4 x 4 hex numbers

* waveform.v for connecting the dots of the samples with lines

other:

* adc.v for reading the ADC

* debounce.v for debouncing the encoder

* encoder.v for converting quadrature encoder to a count

 

useful modules from https://github.com/juanmard/screen-numbers

* fontROM.v implements a BRAM that can be initialised from a list (used for the numbers and the sample storage)

* image.v selects a pixel from the fontROM BRAM

# thanks

* [icestorm](http://www.clifford.at/icestorm/) opensource FPGA tools.

## License

Licensed under [GPL-2.0](https://opensource.org/licenses/GPL-2.0).