EV-2 Datasheet, PDF (42/44 Pages) Cirrus Logic – Digital Audio Networking Processor

CobraNet™ EV-2
TestEV <what>
This is used for manufacturing tests of the EV-2 and in general only the ‘resetcn’ will be useful to
the user.
<what> =
memory – performs an EV-2 memory test, returns either a pass or fail.
watchdog – checks the CM watchdog signal to make sure it is in tolerance. Returns pass
or fail and measured frequency of CM watchdog signal
host – performs a host test, returns pass or fail.
resetcn – resets the CM.
Packet <what> <arg2>
This command will perform a packet transfer between CM/EV-2 boards and is used to demonstrate
and test the Cobranet packet bridge feature. Two packet types are supported, either command
based or text based. The command packet will send an EV-2 line command to the other EV-2
which will return any results (an example would be a query command) as a text based packet. A
text based packet will send text to the other EV-2 to be put out its 8051 serial port. This is much
like an instant message.
<what> =
command: This tells the receiving CM that the following <arg2> is a line command.
<arg2>: this is any valid line command as described in this document.
text: this tells the receiving CM that the following <arg2> is text and will output the text
to the serial port.
<arg2>: text that may be separated by spaces. Everything that follows the “text”
parameter will be considered text.
on: turns packet processing on.
off: turns packet processing off.
Examples:
packet command query device
This example will return what type of CN module is on the other EV-2.
packet text how are you today?
This will send out the 8051 serial port of the other EV-2 the text: how are you
today?
Please note that the on and off commands are from the perspective of the EV-2 and not the CM, i.e., the
CM will still process commands from other sources if set up to do so.
Rev. 2.1
42