ECPDAP

ECPDAP allows you to program ECP5 FPGAs and attached SPI flash using CMSIS-DAP probes in JTAG mode.

JTAG Scan Chains

ECP5 FPGAs can be programmed on arbitrary JTAG scan chains; you may need to specify --ir-lengths and possibly specify a higher --scan-chain-length depending on the other devices on your scan chain.

However, the attached SPI flashes require that the ECP5 is the only device on the scan chain (in other words, the probe TDI and TDO connect directly to the ECP5 pins).

Pre-built Binaries

Pre-built binaries are available for Windows and Linux on the [Releases] page. You must have [libusb] installed or available on your system, and you must have permissions or drivers set up to access your CMSIS-DAP probe.

Building

• You must have a working Rust compiler installed. Visit rustup.rs to install Rust.
• You must have [libusb] installed.
• You'll need to set up drivers or permissions to access the USB device.

Build and install for your user, without checking out the repository:

cargo install ecpdap

Building locally after checking out this repository:

cargo build --release

You can either run the ecpdap executable directly from target/release/ecpdap, or you can install it for your user using cargo install --path ..

Usage

Run ecpdap help for detailed usage. Commonly used commands:

• ecpdap probes
• ecpdap scan
• ecpdap program bitstream.bit
• ecpdap flash id
• ecpdap flash scan
• ecpdap flash write bitstream.bit