Custom instructions for the CV32E40X on an ASIC using SKY130.
I created a small setup script that needs to be placed alongside the cloned repository.
.
├── tristan-asic (this repository)
├── dependencies (create this folder)
└── setup.sh
The contents of the script setup.sh are:
#!/bin/bash
# Absolute path to this script
SCRIPT=$(readlink -f "$0")
# Absolute path this script is in
SCRIPTPATH=$(dirname "$SCRIPT")
echo $SCRIPTPATH
export OPENLANE_ROOT=$SCRIPTPATH/dependencies/openlane_src
export PDK_ROOT=$SCRIPTPATH/dependencies/pdks
export PDK=sky130B
Before doing anything in this repository, first activate this script:
> source setup.sh
To install OpenLane run the following inside the root directory of this repository:
> make setup
Clone all submodules:
> git submodule update --init --recursive
Next build the preprocessed design in tristan/:
> make preprocessed.v
Add the power pins manually to the cv32e40x_top module in preprocessed.v:
`ifdef USE_POWER_PINS
inout vccd1, // User area 1 1.8V supply
inout vssd1, // User area 1 digital ground
`endif
Inside the root directory harden the macros:
> make cv32e40x_top
Planned SoC:
Peripherals:
- GPIO
- 2xTimer
- UART
- WFG
- Blinky
