VHDL Code Library

All code on this page is released under an open-source license (LGPL). It is the 21th century reconfigurable logic equivalent of 74xx logic. A collection of small building blocks that can help you to build larger FPGA designs.

vhdl_gen.zip
Last update 20100714
Some support entities. Contains entities of binary counters, a reset circuit and a pipeline register (with configurable depth and width).

vhdl_io_ps2.zip
Lowlevel device-drivers in VHDL for PS/2 keyboard and mouse. The keyboard driver delivers raw scan-codes and can update the status of the LEDs. The mouse driver supports both 2 button-mice and 3 button-mice with scroll-wheel. The scroll-wheel support can be turned off to reduce logic gate usage. Don't forget to set the correct value for ticksPerUsec (aka the clock-speed in MHz).