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Lucid V2

You can find FPGA tutorials using Lucid V2 in the sidebar. If you find any bugs, please make a PR or report it to your instructor.

If you’re familiar with Lucid V1, Lucid V2 comes with a few breaking changes (although they are 90% similar and shouldn’t be too difficult to get used to). Read this post to find out more about the breaking changes.

Here are the list of guides written so far, separated by categories.

  • Debugging Strategies: a collection of debugging strategies depending on the severity of your bugs. Refer to each section depending on your needs.
  • Pitfalls: a collection of common pitfalls and bugs when programming in Lucid HDL
  • Testbench: using Alchitry IDE’s testbench to speed up development

Alchitry Hardware Guides

  • Alchitry Pinout: how to connect external I/O devices to your Alchitry boards.
  • Board Reset: how to properly reset your system so that they are all synchronized and comes out of reset at the same time
  • Clocks: how to generate other clock signals other than 100MHz by default

Drivers

  • WS2812B (NeoPixel): an addressable RGB LED where each LED has a built-in driver so you send a timed one-wire data stream and each LED latches its own 24-bit color and forwards the rest down the chain.
  • MAX7219: a serially controlled LED matrix/7-seg driver IC that multiplexes 8 digits (8x8 matrix) with built-in current regulation, letting you update the display by writing registers over SPI-like signals.
  • SN74HC595: an 8-bit serial-in, parallel-out shift register that shifts bits in on a clock and then latches them to 8 output pins (and can be daisy-chained for more outputs).
  • RGB LED Matrix (HUB75, Adafruit-style panels): a scanned (multiplexed) RGB panel interface where you stream pixel data into shift registers for the active row pair and use row-address and latch/clock signals to refresh the display continuously.

Useful Modules