ElemRV

Fully Open Source RISC-V Microcontroller written in SpinalHDL. The chip layout was done with the IHP SG13G2 PDK and the open RTL-to-GDSII tool OpenROAD.

Installation

ElemRV-init comes with a container image which has all required host dependencies installed. Therefore, only the sources have to be locally installed and you keep your host system clean.

• Install podman:

  sudo apt install podman
  

• Build the podman container:

  podman build -t elemrv:v1.0 .
  
  podman run \
      -v $XAUTHORITY:$XAUTHORITY:ro \
      -v /tmp/.X11-unix:/tmp/.X11-unix:ro \
      -e "DISPLAY" \
      -v $PWD:/srv/elemrv \
      --workdir=/srv/elemrv \
      --detach \
      --name elemrv_container \
      -it elemrv:v1.0 \
      sleep infinity
  

• Download all sources:

  ./init.sh
  

Container

This chapter is a quick introduction into container handling. After the installation, you should have a container called elemrv_container running on your system.

$ podman ps
CONTAINER ID  IMAGE                    COMMAND         CREATED        STATUS            PORTS       NAMES
6a4bc5082aeb  localhost/elemrv:v1.0    sleep infinity  5 minutes ago  Up 5 minutes ago              elemrv_container

If it's not running, you can check if the container exists.

$ podman container ls -a
CONTAINER ID  IMAGE                    COMMAND         CREATED        STATUS            PORTS       NAMES
6a4bc5082aeb  localhost/elemrv:v1.0    sleep infinity  7 minutes ago  Up 7 minutes ago              elemrv_container

When you're finished and you want to stop the container, run the following command to stop the ElemRV container.

podman stop elemrv_container

Obviously, before the next session, start the container again.

podman start elemrv_container

The next chapter guides through the ASIC flow. However, you can also go into the container and run all make targets there.

podman exec -it elemenrv_container bash

ASIC Flow

First, create a layout from the Verilog file.

podman exec -it elemenrv_container bash -c 'make sg13g2-synthesize'

Please check Known Issues in case the chip layout failed.

Next, open the chip yout and inspect it.

podman exec -it elemenrv_container bash -c 'make sg13g2-klayout'

Alternatively, run Design Rule Checks to verify the chip is good.

podman exec -it elemenrv_container bash -c 'make sg13g2-drc'

Use the make sg13g2-drc-gui target to show all DRC issues.

Known Issues

License

Copyright (c) 2024 Steffen Reith and Daniel Schultz. Released under the Apache License.