diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/openocd.texi | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 8547fda4..bb96a2e6 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -5295,11 +5295,23 @@ Several of the parameters must reflect the trace port capabilities, which are a function of silicon capabilties (exposed later using @command{etm info}) and of what hardware is connected to that port (such as an external pod, or ETB). -The @var{width} must be either 4, 8, or 16. -The @var{mode} must be @option{normal}, @option{multiplexted}, -or @option{demultiplexted}. +The @var{width} must be either 4, 8, or 16, +except with ETMv3.0 and newer modules which may also +support 1, 2, 24, 32, 48, and 64 bit widths. +(With those versions, @command{etm info} also shows whether +the selected port width and mode are supported.) + +The @var{mode} must be @option{normal}, @option{multiplexed}, +or @option{demultiplexed}. The @var{clocking} must be @option{half} or @option{full}. +@quotation Warning +With ETMv3.0 and newer, the bits set with the @var{mode} and +@var{clocking} parameters both control the mode. +This modified mode does not map to the values supported by +previous ETM modules, so this syntax is subject to change. +@end quotation + @quotation Note You can see the ETM registers using the @command{reg} command. Not all possible registers are present in every ETM. |