User`s manual

AMBE-3000™-HDK Development Board
User’s Manual Version 1.1
Page 19
Operation
Operation
DVSI Confidential Proprietary
Operating Modes
The HDK provides different operating modes to allow testing and evaluation of data to and from the
AMBE-3000™ vocoder chip at various stages along the data path. This gives the user the opportunity
to understand how the AMBE-3000™ vocoder chip needs to be implemented and how to use the HDK
as a tool to verify a new design.
The user can select what mode the HDK will be in on start-up or after a reset through setting of Switch
2. See Table 19 HDK Boot-up Mode Selection. This allows the user to set the mode of the HDK without
having to connect to a PC. If the use a PC is desired then switch SW2 must be set so that the HDK
boot mode is set to IDLE.
SW2 Switch Position
Boot Up Mode
Position 4 Position 3 Position 2
Idle
OFF OFF OFF
Packet Mode
OFF OFF ON
Loopback Mode - PPT
OFF ON ON
Loopback Mode - UART
OFF ON OFF
A3kdirect Mode
ON ON OFF
Dual HDK Mode Skew ON
ON OFF OFF
Dual HDK Mode Skew OFF
ON OFF ON
Table 19 HDK Boot-up Mode Selection
The following is the list of operating modes:
HDK Mode Description
Option Command hdkcom.exe Option Description
IDLE Mode --- The HDK is ready to accept commands from the PC.
-mode idle
Sets the HDK mode to Idle
Codec Play/Record Mode* --- The HDK plays an audio file out the analog audio output, or record the
audio input to a file or do both at the same time.
-mode codec
This sets the HDK to stay in Codec Play/Record mode and the HDK is ready
to process audio
-play
Send a file to the HDK to be decoded and heard through the analog output.
-record
To record the audio input to an encoded file
-playrecord
Send an encoded speech file to the HDK to be decoded and played through
the analog output while simultaneously recording an encoded file using the
analog input as an audio source.
Packet Mode*--- The HDK is ready to encode a PCM file and save it to the PC, or Decode an
encoded file and save it to the PC, or do both at the same time.
-mode packet
This sets the HDK to stay in packet mode and the HDK is ready to process
files
Digital Voice Systems, Inc.
The Speech Compression Specialists