SPIDAP

SPIDAP allows you to use CMSIS-DAP compatible probes in JTAG mode to access SPI flash memories directly, using the JTAG signals to emulate SPI.

The probe must be connected directly to the SPI flash:

JTAG signal	SPI Flash
JTMS	CS
JTCK	CLK
JTDI	SDI
JTDO	SDO

This crate uses jtagdap to handle CMSIS-DAP and JTAG, and spi-flash-rs to handle the SPI flash itself. For programming ECP5 FPGAs over JTAG using CMSIS-DAP probes, check out ecpdap, which uses the same libraries.

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.
• libusb is recommended to use the higher-speed CMSIS-DAPv2 protocol, where supported by your probe.
• You may need to set up drivers or permissions to access the USB device.

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

cargo install spidap

Or, building locally after checking out this repository:

cargo build --release

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

Usage

Run spidap help for detailed usage. Commonly used commands:

• spidap probes: List all detected CMSIS-DAP probes
• spidap id: Read the flash manufacturer and product IDs
• spidap scan: Read the flash SFDP metadata and status registers
• spidap write data.bit: Write data.bit to flash memory.

Licence

spidap is licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.