ice40-rs

This is an embedded-hal driver for configuration of iCE40 series FPGAs from Lattice.

See technical note TN1248 - iCE40 Programming and Configuration on how the slave configuration interfaceworks.

Quickstart

[dependencies]
ice40-rs = "0.3"

Example

// Configure device with bitstream
let mut device = ice40::Device::new(spi, ss, done, reset, DummyDelay);
device
    .configure(&bitstream[..])
    .expect("Failed to configure FPGA");

The examples folder contains a utility for configuring a device using linux and ftdi embedded-hal.

You can use them with the following commands:

FTDI

Assumes the FTDI circuit is connected like the ice40-breakout board.

cargo run --example ftdi -- my_image.bin

ice40-rs/ftdi 0.1.0
FTDI demo

USAGE:
    ftdi [OPTIONS] <binary>

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

OPTIONS:
    -f, --frequency <frequency>    Bus frequency [default: 3000000]

ARGS:
    <binary>    Binary file

Linux

Default arguments are for a Raspberry pi Model 4.

cargo run --example linux -- my_image.bin

ice40-rs/linux 0.1.0
Linux demo

USAGE:
    linux [OPTIONS] <binary>

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

OPTIONS:
        --cdone <cdone>            CDONE pin [default: 24]
        --creset <creset>          CRESET pin [default: 25]
    -f, --frequency <frequency>    Bus frequency [default: 3000000]
        --spi <spi>                SPI bus [default: /dev/spidev0.0]
        --ss <ss>                  SS pin [default: 8]

ARGS:
    <binary>    Binary file

Limitations

The library only support volatile configuration of the device, not external nonvolatile memory.