User`s manual

AMBE-3000™-HDK Development Board
User’s Manual Version 1.1
Page 40
DVSI Confidential Proprietary
Operation
A3kdirect Command Example
C:\ Command Prompt
- ’ X
hdkcom.exe –port COM4 460800 –r <rate index or rate words in hex> –mode
a3kdirect
where:
-port COM4 is the PC’s COM port that the HDK communicates on as indicated by Windows
Device Manger
460800 is the baud rate of the PC connection
-r is the rate index of the bit rate the file is to be decoded at. See Table 23 Standard Rate Table
for AMBE-3000. To use rate words to set the rate – the format must be six words in hex separated
by a space as shown in the following example:
-r 0x0460 0x0986 0x0000 0x0000 0x0000 0x5660
-mode dsp is to set the board into A3kdirect Mode
Note: Once the HDK is set to A3kdirect Mode it will stay in this mode until another command is issued
to put it into another mode. It is recommended to always switch back into Idle Mode before switching in
between modes.
Dual HDK Mode (Full Duplex)
The AMBE-3000 HDK can be directly connected to a second AMBE-3000 HDK using the RS-232
channel interface (P2). This physical link establishes a real-time, full-duplex communication connection
between the two units. Each board can select either the handset or line-in input as the audio source.
The analog voice from the first HDK Board is encoded and sent across the RS-232 interface to the
second HDK Board where the incoming channel packets get decoded and played out on the audio
output of the second HDK Board. At the same time the second AMBE-3000™-HDK Vocoder board can
encode speech from its analog input and send the encoded packet across the RS-232 channel to be