Imported from GitHub: jboone/tedium · commit c7de561 · license BSD-3-Clause

Description

TDM telephony experimentation

README

tedium-soc

This is the firmware that runs on the "system-on-chip" (SoC) on the FPGA, and works closely with the framer IC to provide a tidy and expeditious interface to the host over USB.

Building

As of Rust 1.61, the .cargo configuration for this firmware sub-project will be ignored if you compile from the project root, where the Cargo.toml that itemizes the project workspaces. You will need to build from the directory this README.md is in, in order to have cargo compile for the correct RISC-V architecture.

# Make sure the necessary RISC-V Rust compiler is installed.
$ rustup target add riscv32i-unknown-none-elf
# Build the firmware.
$ cargo build --release
# Strip the resulting ELF binary to just the sections to load into the SoC.
$ riscv32-unknown-linux-gnu-objcopy -Obinary target/riscv32i-unknown-none-elf/release/tedium-soc tedium-soc.bin

Downloading to FPGA

This firmware's binary is loaded via the lambdasoc BIOS running on the RISC-V in the FPGA.

$ python ~/src/tedium-project/lambdasoc/lambdasoc/tools/flterm.py --kernel tedium-soc.bin /dev/ttyUSB2
BIOS> serialboot
# ...and the firmware is downloaded and executed by the SoC.
# You may now interact with Tedium via the Rust runtime tools.