Full Open Source Blinky on XC7K325T using yosys+nextpnr-xilinx

NOTE: This repository is now somewhat obsolete:

Since the creation of the toolchain installer, the Makefile used here will not work probably with the snap-packaged toolchain, because the Makefile here builds and installs its own toolchain instead in different directories.

For examples of Makefiles using the packaged toolchain, see demo-projects

Blinky on QMTech XC7K325T Core Board (xc7k325tffg676-1)

• For guide to reproduce see list below
• Full size video: [https://user-images.githubusercontent.com/148607/152079511-89539119-5d66-42f2-a709-3e35a81d7c0f.mp4]
• Large image: https://user-images.githubusercontent.com/148607/152079663-e42ce6ed-66ef-461e-aed7-82a4e5667e39.png

Blinky on Digilent Genesys2 (xc7k325tffg900-2)

• For proof of concept see branch ring-oscillator
• Full size video: https://user-images.githubusercontent.com/20798131/152385360-3e4f140e-cb57-4b04-bbc3-1ecd1d7374d5.mov
• Stable operation possible with external "PMOD" type oscillator module
• Breaking: Should now work with the default clock. Unfortunately I don't have the board, so please test if you have it and let us know!

Blinky on the AliExpress STLV7325 board

• works with differential clock input on the high performance banks

Status

• works on the QMTech XC7K325T board
• works with differential clock input on the high performance banks on the STLV7325 board.
• limited functionality on Digilent Genesys2 and Memblaze PBlaze 3 SSD

How to reproduce

1. Install required software
   • sudo apt install libftdi1-dev libudev-dev git cmake build-essential tclsh clang tcl-dev libreadline-dev flex bison python3-dev libboost-all-dev libqt5-base-dev-tools libeigen3-dev python3 python3-pip python3-yaml pypy3 pkg-config libqt5opengl5-dev
   • clone/build/install yosys from https://github.com/YosysHQ/yosys or download a release from https://github.com/YosysHQ/oss-cad-suite-build/releases note: test have been performed with Yosys 0.13+28 (git sha1 bf85dfee5, gcc 10.2.1-6 -fPIC -Os)
2. git clone --recurse-submodules https://github.com/kintex-chatter/xc7k325t-blinky-nextpnr.git
3. cd xc7k325t-blinky-nextpnr
4. make BOARD=qmtech setup
5. make BOARD=qmtech all

Note: Every time you change the installation of nextpnr-xilinx you will have to regenerate the chipdb, because the chipdb does not seem to be compatible between different binaries of nextpnr-xilinx