GDS files: compress them

$make compress

$ gzip -dc user_project_wrapper.gds.gz | sha1sum -
04d8d21ac5e49d91fee4a76f5682b9211a9093b1  -
$ gzip -dc wrapper_sha1.gds.gz | sha1sum
060db8226cb69f788368b0457ff936c52007dd5a  -

$ sha1sum *wrapper*.gz
c57c737bbf0b823b189ccf3542c407bfe1d972f4  gds/user_project_wrapper.gds.gz
a30a05136ac741e60d71cf13f6007d4c4204d270  gds/wrapper_sha1.gds.gz

Signed-off-by: Konrad Rzeszutek Wilk <>
3 files changed
tree: 58febcbaee578562914fc65a47cf49282bd4a28f
  1. .github/
  2. def/
  3. docs/
  4. gds/
  5. lef/
  6. mag/
  7. maglef/
  8. openlane/
  9. pics/
  10. signoff/
  11. spi/
  12. verilog/
  13. .gitignore
  14. .gitmodules
  15. info.yaml
  17. Makefile

Caravel User Project

License UPRJ_CI Caravel Build

SHA-1 engine

See a for the full git history of this code. Branch name is submission-mpw-two-c.

This is an implementation of [](RFC 3174) of SHA-1 engine.

It is not the most secure one nowadays (it is still used for git commit ids and TPM PCR values), but it looked like the easiest of the SHA engines to implement. The communication channel is via WishBone commands to provide sixteen words after which the engine starts and computes the digest in about 160 cycles. Then digest can be retrieved via the wishbone. There is a IRQ line so when it has completed it will bring it high if that is enabled.


If you want to see this more interactively, I would recommend you clone and run

make test_wb_logic

which will use the various WishBone commands to program it.