User`s manual

AMBE-3000™-HDK Development Board
User’s Manual Version 1.1
Page 20
DVSI Confidential Proprietary
Operation
-enc
To encode a PCM file and save it to File on the PC
-dec
To decode an encoded file and save it to a PCM File
-encdec
To encode a PCM file then decode it to a PCM File and save it on the PC
Loopback Mode --- Analog speech input from the handset or RCA jack input connections gets
encoded by the AMBE-3000™ Vocoder chip looped through either it’s PPT or UART interface and
played back out the analog audio outputs.
-mode loopback
Sets the HDK mode to loopback
A3kdirect Mode --- directly connects the AMBE-3000™ Vocoder Chip’s UART Interface to a PC using
the RS-232 port interface (P1) Note: a Serial to USB adapter is required.
-mode a3kdirect
Sets the HDK mode to a3kdirect
Dual HDK Mode --- directly connects two AMBE-3000 HDK’s together using the RS-232 channel
interface (P2).
-mode dualhdkskew
Sets the HDK mode to Dual HDK Mode with Skew ON
-mode dualhdk
Sets the HDK mode to Dual HDK Mode with Skew OFF
Table 20 HDK Modes
HDK to AMBE-3000™ Vocoder Chip Interface
The USB interface on the HDK is used for board setup and control. The HDK provides access to the
parallel and UART interfaces on the AMBE-3000™ vocoder chip. When running in Codec Play /Record
Mode, Packet Mode or Loopback Mode the user can select either PPT or UART interface to use. If the
UART is selected then a Null Modem Jumper cable between P1 and P2 is needed When running in
a3kdirect Mode the HDK connects the UART Interface of the AMBE-3000™ Vocoder Chip to the P1
serial port and needs a “serial to USB adapter” to achieve the required data rate. When running in Dual
HDK Mode the HDK uses the Parallel Interface of the AMBE-3000™ Vocoder Chip.
HDK to AMBE-3000™ Vocoder Chip Interface Selection
HDK Interfaces Description
Option Command Connection
PPT Interface
When using the PPT Interface in Codec Play /Record Mode, Packet Mode or
Loopback Mode, a USB Cable to the PC is required for configuration and control
-ppt
When using the PPT Interface in Dual HDK Mode, a USB Cable to the PC is
required and Null Modem Cable is required to connect P2 of HDK board ”A” to P2
of HDK board “B”
UART Interface
When using the UART Interface in Codec Play/Record Mode, Packet Mode or
Loopback Mode a Null Modem Jumper Cable is required to connect P1 to P2
-uart
When using the UART Interface in a3kdirect Mode a standard serial cable is
required to connect P1 to a COM Port on a PC (a “serial to USB adapter” may be
used)
Table 21 HDK AMBE-3000™ Interfaces
*Note: To run in Codec Play/Record or Packet Modes start in Idle Mode. When the
hdkcom.exe program is run with one of the process options –enc, -dec, -encdec, -play, -record,
-playrecord, the HDK will automatically switch into either Codec or Packet Mode. After the file
is processed the HDK will automatically switch back into Idle mode.