Release 1.4

Improvements to MachXO2/3 support.

Release 1.3

Adding the split-SLICE routing graph generation option as required for latest nextpnr.

Release 1.2.1

Bump vendored pybind11 version for Python 3.11 support.

Release 1.2

for nextpnr 0.2

Release 1.1

Merge pull request #178 from ngi-nix/fixnogit

Fix building without git

Stable Release 1.0

This first stable release of Trellis contains a reasonable set of ECP5 data and support code, including:

• All logic tile functionality and routing
• Majority of IO and IOLOGIC (DDR, gearboxes, etc) routing and config
• All block RAM routing and config
• Global clock routing
• Gigabit transceivers (DCUs)
• PLLs, clock dividers, internal oscillator, DQSBUF, DDRDLL, other misc blocks
• Tools for packing/unpacking bitstreams and calculating PLL configs
• Utility functions for building PnR databases and rendering database as HTML