83e0293f7b
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 |
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| manual | ||
| usb_adapters | ||
| .gitattributes | ||
| Makefile.am | ||
| checkpatch.rst | ||
| fdl.texi | ||
| openocd.1 | ||
| openocd.texi | ||