riscv-openocd/tcl/interface/spidev_example.cfg

# SPDX-License-Identifier: GPL-2.0-or-later

# Example config for using Linux spidev as a SWD adapter.

adapter driver linuxspidev
adapter speed 3000
spidev path "/dev/spidev0.0"
spidev mode 3
spidev queue_entries 64
Add Linux SPI device SWD adapter support To alleviate the need to bitbang SWD, I've written a SWD SPI implementation. This code is inspired by the work of luppy@appkaki.com as shown at github.com/lupyuen/openocd-spi but with the desire to be more generic. This implementation makes use of the more common 4 wire SPI port using full duplex transfers to be able to capture the SWD ACK bits when a SWD TX operation is in progress. TEST: Connects successfully with the following combinations: Hosts: Raspberry Pi 4B Unnamed Qualcomm SoC with QUPv3 based SPI port Targets: Raspberry Pi 2040 Nordic nRF52840 NXP RT500 Change-Id: Ic2f38a1806085d527e6f999a3d15aea6f32d1019 Signed-off-by: Richard Pasek <rpasek@google.com> Reviewed-on: https://review.openocd.org/c/openocd/+/8645 Reviewed-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com> Reviewed-by: zapb <dev@zapb.de> Tested-by: jenkins 2024-12-10 23:43:57 -06:00			`# SPDX-License-Identifier: GPL-2.0-or-later`

			`# Example config for using Linux spidev as a SWD adapter.`

			`adapter driver linuxspidev`
			`adapter speed 3000`
			`spidev path "/dev/spidev0.0"`
			`spidev mode 3`
			`spidev queue_entries 64`