84 lines
3.5 KiB
Markdown
84 lines
3.5 KiB
Markdown
<!--
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SPDX-License-Identifier: LGPL-3.0-or-later
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See Notices.txt for copyright information
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-->
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# Fayalite
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Fayalite is a library for designing digital hardware -- a hardware description language (HDL) embedded in the Rust programming language. Fayalite's semantics are based on [FIRRTL] as interpreted by [LLVM CIRCT](https://circt.llvm.org/docs/Dialects/FIRRTL/FIRRTLAnnotations/).
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[FIRRTL]: https://github.com/chipsalliance/firrtl-spec
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# Building the [Blinky example] for the Arty A7 100T on Linux
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[Blinky example]: crates/fayalite/examples/blinky.rs
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This uses the container image containing all the external programs and files that Fayalite needs to build for FPGAs, the sources for the container image are in https://git.libre-chip.org/libre-chip/fayalite-deps
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Steps:
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Install podman (or docker).
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Run:
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```bash
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podman run --rm --security-opt label=disable --volume="$(pwd):$(pwd)" -w="$(pwd)" -it git.libre-chip.org/libre-chip/fayalite-deps:latest cargo run --example blinky yosys-nextpnr-xray --nextpnr-xilinx-chipdb-dir /opt/fayalite-deps/nextpnr-xilinx/xilinx --prjxray-db-dir /opt/fayalite-deps/prjxray-db --platform arty-a7-100t -o target/blinky-out
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```
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To actually program the FPGA, you'll need to install [openFPGALoader] on your host OS:
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[openFPGALoader]: https://github.com/trabucayre/openFPGALoader
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On Debian 12:
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```bash
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sudo apt update && sudo apt install openfpgaloader
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```
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Then program the FPGA:
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```bash
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sudo openFPGALoader --board arty_a7_100t target/blinky-out/blinky.bit
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```
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This will program the FPGA but leave the Flash chip unmodified, so the FPGA will revert when the board is power-cycled.
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To program the Flash also, so it stays programmed when power-cycling the board:
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```bash
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sudo openFPGALoader --board arty_a7_100t -f target/blinky-out/blinky.bit
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```
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# Building the [Transmit-only UART example] for the Arty A7 100T on Linux
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[Transmit-only UART example]: crates/fayalite/examples/tx_only_uart.rs
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Follow the steps above of building the Blinky example, but replace `blinky` with `tx_only_uart`.
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View the output using [tio](https://github.com/tio/tio) which you can install in Debian using `apt`.
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Find the correct USB device:
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```bash
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sudo tio --list
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```
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You want the device with a name like (note the `if01`, `if00` is presumably the JTAG port):
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`/dev/serial/by-id/usb-Digilent_Digilent_USB_Device_210319B4A51E-if01-port0`
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Connect to the serial port:
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```bash
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sudo tio -b115200 /dev/serial/by-id/put-your-device-id-here
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```
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You'll see (repeating endlessly):
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```text
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Hello World from Fayalite!!!
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Hello World from Fayalite!!!
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Hello World from Fayalite!!!
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```
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Press Ctrl+T then `q` to exit tio.
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# Funding
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## NLnet Grants
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* [Libre-Chip CPU with proof of No Spectre bugs](https://nlnet.nl/project/Libre-Chip-proof/) 2024-12-324 [(progress)](https://git.libre-chip.org/libre-chip/grant-tracking/src/branch/master/nlnet-2024-12-324/progress.md)
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This project was funded through the [NGI0 Commons Fund](https://nlnet.nl/commonsfund), a fund established by [NLnet](https://nlnet.nl/) with financial support from the European Commission's [Next Generation Internet](https://ngi.eu) programme, under the aegis of [DG Communications Networks, Content and Technology](https://commission.europa.eu/about-european-commission/departments-and-executive-agencies/communications-networks-content-and-technology_en) under grant agreement № [101135429](https://cordis.europa.eu/project/id/101135429). Additional funding is made available by the [Swiss State Secretariat for Education, Research and Innovation](https://www.sbfi.admin.ch/sbfi/en/home.html) (SERI).
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