DCH Commands #

Use the DCH commands to view statistics and configure protocol version and enabled message types.

For more information about DCH, see the DCH overview.


Commands	Description
dch info	Get statistics about packets that have passed through DCH.
dch message	Select DCH message types and DCH protocol version.

dch info#

Get statistics about packets that have passed through DCH.

Command Line Syntax

$ dch info$ dch info

Command Line Example

$ dch info
------ Data Channel Statistics ------
AEM sent packets                 :       1070 packets
AEM skipped buffers              :          1 buffers
PCS skip count                   :          0 samples
PCS sent count                   :          0 buffers
PCS overflow                     :          0 buffers
PCS buffer status                :          0 of max 252 samples
EXC skip count                   :          0 samples
EXC sent count                   :          0 buffers
EXC overflow                     :          0 buffers
EXC items                        :          0 of max 337 samples
DCH sent bytes                   :    1708590 bytes
DCH skipped bytes                :          0 bytes
DCH Sent                         :       1075 packets
DCH Timeouts                     :          0 errors
DCH Partial sends                :          0 errors
DCH Pipe full                    :          0 errors
DCH Other Errors                 :          0 errors
VUART sent upstream              :          0 bytes
VUART skip upstream              :          0 bytes
VUART sent downstream            :          0 bytes
VUART skip downstream            :          0 bytes
VUART RTT errors                 :          0 errors
Logic Analyzer sent packets      :          5 packets$ dch info
------ Data Channel Statistics ------
AEM sent packets                 :       1070 packets
AEM skipped buffers              :          1 buffers
PCS skip count                   :          0 samples
PCS sent count                   :          0 buffers
PCS overflow                     :          0 buffers
PCS buffer status                :          0 of max 252 samples
EXC skip count                   :          0 samples
EXC sent count                   :          0 buffers
EXC overflow                     :          0 buffers
EXC items                        :          0 of max 337 samples
DCH sent bytes                   :    1708590 bytes
DCH skipped bytes                :          0 bytes
DCH Sent                         :       1075 packets
DCH Timeouts                     :          0 errors
DCH Partial sends                :          0 errors
DCH Pipe full                    :          0 errors
DCH Other Errors                 :          0 errors
VUART sent upstream              :          0 bytes
VUART skip upstream              :          0 bytes
VUART sent downstream            :          0 bytes
VUART skip downstream            :          0 bytes
VUART RTT errors                 :          0 errors
Logic Analyzer sent packets      :          5 packets

dch message#

The command supports two subcommands:

Set the DCH protocol version: Accepts version numbers 2 or 3.
Set the DCH message type: Supports the following types: aem (Advanced Energy Monitor), exc (exception), pcs (Program Counter sample), pti (Packet Trace interface), and logic (logic analyzer).

Command Line Syntax

$ dch message
$ dch message version [versionNumber]
$ dch message <messageType> <enable/disable>$ dch message
$ dch message version [versionNumber]
$ dch message <messageType> <enable/disable>

Command Line Examples

$ dch message
Message version  : 3
Messages enabled : aem logic 

$ dch message aem enable
Message type aem is enabled.

$ dch message version 3
Current version = 3$ dch message
Message version  : 3
Messages enabled : aem logic 

$ dch message aem enable
Message type aem is enabled.

$ dch message version 3
Current version = 3