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tillitis-key/doc/toolchain_setup.md

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Toolchain setup

Here are instructions for setting up the tools required to build the project. Tested on Ubuntu 22.04 LTS.

Gateware: icestorm toolchain

These steps are used to build and install the icestorm toolchain (in /usr/local). Note that nextpnr replaces Arachne-PNR.

sudo apt install build-essential clang lld bison flex libreadline-dev \
                     gawk tcl-dev libffi-dev git mercurial graphviz   \
                     xdot pkg-config python3 libftdi-dev \
                     python3-dev libboost-dev libeigen3-dev \
                     libboost-dev libboost-filesystem-dev \
                     libboost-thread-dev libboost-program-options-dev \
                     libboost-iostreams-dev cmake

git clone https://github.com/YosysHQ/icestorm
cd icestorm
make -j$(nproc)
sudo make install
cd ..

# Custom iceprog for the RPi 2040-based programmer (will be upstreamed).
git clone -b interfaces https://github.com/tillitis/icestorm tillitis--icestorm
cd tillitis--icestorm/iceprog
make
sudo make PROGRAM_PREFIX=tillitis- install
cd ../..

git clone https://github.com/YosysHQ/yosys
cd yosys
# Avoiding current issue with yosys & icebram, filed in:
# https://github.com/YosysHQ/yosys/issues/3478
git checkout 06ef3f264afaa3eaeab45cc0404d8006c15f02b1
make -j$(nproc)
sudo make install
cd ..

git clone https://github.com/YosysHQ/nextpnr
cd nextpnr
cmake -DARCH=ice40 -DCMAKE_INSTALL_PREFIX=/usr/local .
make -j$(nproc)
sudo make install

References:

Firmware: riscv toolchain

The Tillitis Key 1 implements a picorv32 soft core CPU, which is a RISC-V microcontroller with the M and C instructions (RV32IMC). You can read more about it.

The project uses the LLVM/Clang suite, where version 14 is the latest stable (as of writing). Usually the LLVM/Clang packages that are part of your distro will work, if not, there are installations instructions for "Install (stable branch)" at https://apt.llvm.org/ for Debian and Ubuntu.

References:

Optional

These tools are used for specific sub-components of the project, and are not required for general development

Kicad 6.0: Circuit board designs

The circuit board designs were all created in KiCad 6.0.

mta1-usb-v1-programmer: RPi 2040 toolchain

These tools are needed to build the programmer firmware for the mta1-usb-v1-programmer

TODO

mta1-usb-v1: ch552 USB to Serial firmware

The USB to Serial firmware runs on the CH552 microcontroller, and provides a USB CDC profile which should work with the default drivers on all major operating systems.

TODO

References: