Just for context - the description of the two 'd' remote bitbang "packets":
* SWD write 0 0: https://github.com/openocd-org/openocd/blob/44e02e1f49cc09703cb3b4088d0c1c4f9e2d9c87/doc/manual/jtag/drivers/remote_bitbang.txt#L70 * Sleep for 1 microsecond: https://github.com/openocd-org/openocd/blob/44e02e1f49cc09703cb3b4088d0c1c4f9e2d9c87/doc/manual/jtag/drivers/remote_bitbang.txt#L81