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.
- 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.
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
- 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
- icestorm opensource FPGA tools.
Licensed under GPL-2.0.