EV-2 Datasheet, PDF (41/44 Pages) Cirrus Logic – Digital Audio Networking Processor

CobraNet™ EV-2
Example: led green toggle.
This will change the state of the green LED. If it was on it will be off. If the LED was in
blink mode the LED will continue to blink but will assume the opposite state prior to the
toggle command if blinking is stopped.
Query <what>
This is a command to return information about the EV-2 and/or CM.
<what> =
system: returns information such as MAC address and software/firmware revision levels.
hex: returns the value of the hex switches on the EV-2 board.
status: Returns the status of the device. Generally the EV-2 and CM will be in one of two
states: Ready or Calibrating. The latter indicates that the EV-2 has the ADC and DAC in
calibration mode. This latter mode occurs only after power up and lasts for about 10 sec-
onds.
cnmute: This returns the state of the mute signal coming from the CM. This is not to be
confused with the mute choice of the route command. This is a signal on the CM interface
that the CM controls. It is in either a muted or unmuted state. Querying this will return the
state.
mac: The CM Ethernet MAC address is returned.
device: This will return the module type, CM-1 or CM-2.
hack: Returns the state of the CM HACK# signal, either a “0” or a “1”.
hreq: Returns the state of the CM HREQ# signal, either a “0” or a “1”.
mute: Returns a list of the outputs paths which are muted .
route: Returns a list of the input to output routing information.
gain: This parameter returns the gain information for the EV-2 sinewave.
frequency: Returns a number from 0x1 to 0x8. See Audio frequency below.
Audio <operation> [value]
<operation> =
samplerate
[value] = 48k: changes the CM samplerate to 48k.
96k: changes the CM samplerate to 96k.
calibrate: put the audio converters through a calibration cycle
[value] = N/A
gain: sets the gain for the EV-2 test sinewave.
[value] = 0dB, -6dB, -12dB, -18dB
Default is 0dB.
frequency: sets the frequency for the EV-2 test sinewave.
[value] = 0x1-0x8 This value is a multiple of the fundamental frequency which is
1.5kHz for the 48kHz sample rate and 3.0 kHz for the 96kHz sample rate. Default
is the fundamental.
hpf: enables (0) or disables (1) the high pass filter in the ADC, see the Cirrus Logic
CS5381 data sheet for more details on the operation of the high pass filter.
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Rev. 2.1