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foss-eda-tools / third_party / shuttle / sky130 / mpw-006 / slot-032 / ff79e9296da0cc9ee6c8a677f30b1cdbf3419124
commitff79e9296da0cc9ee6c8a677f30b1cdbf3419124[log] [tgz]
authorCharlie <charlie.david.smith@hotmail.co.uk>Sun May 22 16:49:09 2022 +0100
committerCharlie <charlie.david.smith@hotmail.co.uk>Sun May 22 16:49:09 2022 +0100
treea8f641d0e832101dda792cb526cb41ccdba86a76
parent99bde90b21a6fc5e9cda003db05768f02576f272 [diff]
Got user_project_wrapper to build successfully. There are still problems to be resolved, but this is now a
96 files changed
tree: a8f641d0e832101dda792cb526cb41ccdba86a76
  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 separate outputs (2 are internal read only)

Memory Map

Memory map for Experiar SoC

Macro Layout

Build Status

  • CaravelHost: Success
  • ExperiarCore: Success (Seem to be missing much of the core from the gds)
  • Flash: Success
  • Peripherals: Success
  • Video: Success
  • WishboneInterconnect: Success
  • user_project_wrapper: Success (Max slew violations)

Tests

RTL

verify-peripheralsGPIO-rtl: Success

verify-peripheralsUART-rtl: Not implemented

verify-peripheralsSPI-rtl: Not implemented

verify-peripheralsPWM-rtl: Not implemented

verify-memory-rtl: Not implemented

verify-video-rtl: Not implemented

verify-core-rtl: Not implemented

GL

verify-peripheralsGPIO-gl: Failed

verify-peripheralsUART-gl: Not implemented

verify-peripheralsSPI-gl: Not implemented

verify-peripheralsPWM-gl: Not implemented

verify-memory-gl: Not implemented

verify-video-gl: Not implemented

verify-core-gl: Not implemented

Need to do

  • Investigate why core is not actually being built
  • Write remaining tests (and fix everything until they pass)
  • Fix timing violations

Could do

  • Flash controller
  • JTAG core management controller
  • CSRs
  • More tests
  • Tile map rendering

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.