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| author | Tomas Vanek <vanekt@fbl.cz> | 2021-11-23 13:17:47 +0100 |
|---|---|---|
| committer | Antonio Borneo <borneo.antonio@gmail.com> | 2021-12-03 21:52:12 +0000 |
| commit | af723387be87fadd02abb1f01a2734d004cbb5bc (patch) | |
| tree | 318609f8bc48bcf7e34ae64c9124e5ad2bf3c6e8 /doc | |
| parent | 57d9fd9bbc79e0bf7d642754f41390f17987d8cc (diff) | |
| download | riscv-openocd-af723387be87fadd02abb1f01a2734d004cbb5bc.zip riscv-openocd-af723387be87fadd02abb1f01a2734d004cbb5bc.tar.gz riscv-openocd-af723387be87fadd02abb1f01a2734d004cbb5bc.tar.bz2 | |
doc: mention SWD multidrop
Change-Id: I361dc351c407b67613eadef4d29e27ed0e00bd05
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/6744
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/openocd.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 3373281..4b93a89 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -3433,6 +3433,17 @@ Parameters are currently the same as "jtag newtap" but this is expected to change. @end deffn +@cindex SWD multi-drop +The newer SWD devices (SW-DP v2 or SWJ-DP v2) support the multi-drop extension +of SWD protocol: two or more devices can be connected to one SWD adapter. +SWD transport works in multi-drop mode if @ref{dap_create,DAP} is configured +with both @code{-dp-id} and @code{-instance-id} parameters regardless how many +DAPs are created. + +Not all adapters and adapter drivers support SWD multi-drop. Only the following +adapter drivers are SWD multi-drop capable: +cmsis_dap (use an adapter with CMSIS-DAP version 2.0), ftdi, all bitbang based. + @subsection SPI Transport @cindex SPI @cindex Serial Peripheral Interface @@ -4346,6 +4357,7 @@ instead of "@option{-chain-position} @var{dotted.name}" when the target is creat The @command{dap} command group supports the following sub-commands: +@anchor{dap_create} @deffn {Command} {dap create} dap_name @option{-chain-position} dotted.name configparams... Declare a DAP instance named @var{dap_name} linked to the JTAG tap @var{dotted.name}. This also creates a new command (@command{dap_name}) |