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foss-eda-tools / third_party / shuttle / sky130 / mpw-006 / slot-032 / 8afd017992b715c894a213ffbe2837a4127750a1
commit8afd017992b715c894a213ffbe2837a4127750a1[log] [tgz]
authorCharlie <charlie.david.smith@hotmail.co.uk>Fri May 20 20:31:48 2022 +0100
committerCharlie <charlie.david.smith@hotmail.co.uk>Fri May 20 20:31:48 2022 +0100
treed59c43206df6b9cde6e59dd684cf531b8398b37d
parent8100c3eeee0447a6da520d5c92c907f310947cd4 [diff]
Fixed core 1 SRAM macros not having the correct orientation.
6 files changed
tree: d59c43206df6b9cde6e59dd684cf531b8398b37d
  1. .github/
  2. def/
  3. docs/
  4. gds/
  5. lef/
  6. mag/
  7. maglef/
  8. openlane/
  9. sdc/
  10. sdf/
  11. signoff/
  12. spef/
  13. spi/
  14. verilog/
  15. .gitignore
  16. LICENSE
  17. Makefile
  18. README.md
README.md

ExperiarSoC

RISC-V SoC designed for the Efabless Open MPW Program. This project

Block diagram of Experiar SoC

Features

  • Dual RV32I cores
  • Per core SRAM
  • JTAG interface
  • External flash controller
  • Shared video SRAM
  • Configurable VGA output
  • 3x UART ports + 1 internal to caravel
  • 1x SPI ports
  • 4x PWM counters with 4x seperate outputs (2 are internal read only)

Memory Map

Memory map for Experiar SoC

Macro Layout

Experiar SoC Macro Layout

Build Status

  • CaravelHost: Success
  • ExperiarCore: Success
  • Flash: Success
  • Peripherals: Success
  • Video: Success
  • WishboneInterconnect: Success
  • user_project_wrapper: Error at step 13
    • Running Global Routing Resizer Timing Optimizations: Routing congestion too high

Tests

verify-peripheral-rtl (-gl)

Status: Success

Runs a number of tests (currently just a very basic gpio test) from the management core to ensure the peripherals work correctly.

ToDo

  • Get it to build
  • Flash controller
  • JTAG core managment controller
  • CSRs
  • Write more tests
  • Fix all of the errors

Reference work and inspiration

  • Zero to ASIC Course: Complete course on ASIC design. Also has useful references and terminology definitions.
  • Openlane Documentation: Reference for a lot of configuration. The Variables and Hardening Macros pages have been particularity useful.
  • Caravel Documentation: Reference for caravel and configuration. This seems slightly out of date, but an alternate version can be found in the github repository.
  • Riscduino: Used for inspiration and as a reference for using openlane. There are a number of similar aspects to this project, but all have been reimplemented rather than copied.