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opensecura / 3p / lowrisc / opentitan / e8e636a3bc9c574e60451dc99cc99b017f477a01
commite8e636a3bc9c574e60451dc99cc99b017f477a01[log] [tgz]
authorMartin Lueker-Boden <martin.lueker-boden@wdc.com>Sat May 07 17:08:39 2022 -0700
committerweicaiyang <49293026+weicaiyang@users.noreply.github.com>Tue May 10 22:30:36 2022 -0700
tree22be6c0f2ad06d76d172f84b2e69afda37197e59
parent6163bd16f7edafee524549d81aad2de1564c6f29 [diff]
[spi_host/rtl] Improve handling of CPHA=1 transactions

This commit fixes several small bugs found when CPHA = 1, which delays
the assertion of SD data by 1/2 SCK cycle.  Problems exist when
the shift register receives the delayed control pulses, but
other control signals have been updated prematurely.  This
commit solves the problem by maintaining delayed copies more
required signals such as speed and byte counts.

Signed-off-by: Martin Lueker-Boden <martin.lueker-boden@wdc.com>
1 file changed
tree: 22be6c0f2ad06d76d172f84b2e69afda37197e59
  1. .github/
  2. ci/
  3. doc/
  4. hw/
  5. rules/
  6. site/
  7. sw/
  8. test/
  9. third_party/
  10. util/
  11. .bazelignore
  12. .bazelrc
  13. .bazelversion
  14. .clang-format
  15. .dockerignore
  16. .flake8
  17. .gitignore
  18. .style.yapf
  19. .svlint.toml
  20. .svls.toml
  21. _index.md
  22. apt-requirements.txt
  23. azure-pipelines.yml
  24. bazelisk.sh
  25. BUILD.bazel
  26. check_tool_requirements.core
  27. CLA
  28. COMMITTERS
  29. CONTRIBUTING.md
  30. LICENSE
  31. meson-config.txt
  32. meson.build
  33. meson_init.sh
  34. meson_options.txt
  35. python-requirements.txt
  36. README.md
  37. tool_requirements.py
  38. topgen-reg-only.core
  39. topgen.core
  40. WORKSPACE
  41. yum-requirements.txt
README.md

OpenTitan

OpenTitan logo

About the project

OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.

About this repository

This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or “monorepo”, where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.

Documentation

The project contains comprehensive documentation of all IPs and tools. You can access it online at docs.opentitan.org.

How to contribute

Have a look at [CONTRIBUTING]({{< relref “CONTRIBUTING.md” >}}) and our documentation on project organization and processes for guidelines on how to contribute code to this repository.

Licensing

Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).