Updated to having the flash controller on the wishbone bus. Also added more sram to cores and video device.
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  1. .github/
  2. def/
  3. docs/
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  6. mag/
  7. maglef/
  8. openlane/
  9. sdc/
  10. sdf/
  11. signoff/
  12. spef/
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  14. verilog/
  15. .gitignore
  16. LICENSE
  17. Makefile
  18. README.md
README.md

ExperiarSoC

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

Features

Block diagram of Experiar SoC

  • 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

ToDo

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

Reference work and inspiration

  • 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.
  • 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.
  • Zero to ASIC Course: Complete course on ASIC design. Also has useful references and terminology definitions.