3.
Codec Board Quick Start Guide
3.1
Getting Started
The codec board is supplied with a right angle, 10 way connector that can be used to connect
it to the main developers kit. If required, this should be soldered to the main board.
Alternatively other connectors or ribbon cables can be used.
3.2
Equipment Required (not supplied)
•
Headsets (with microphone) (Standard PC headsets are fine)
•
EZURiO Wireless Developers Kit
•
BISM II
Bluetooth
module (Firmware release V9_20_22 onwards supports audio volume
control)
Normally two sets of development kit are required to test both ends of an audio link. If an
application is being developed with an existing endpoint, such as a mobile phone or headset,
only one set may be needed.
3.3
Motherboard Jumper Settings
Before using the codec board, there is a jumper setting on the motherboard that needs to be
checked. This is CB1, next to the USB adaptor, which
must be removed
. If fitted it will
short out the PCM output from the codec and prevent it operating. CB1 is only relevant for
the WLAN 802.11 data module.
REMOVE
3.4
Procedure:
1)
Plug the BISM II into the socket on the Dev Kit, connect to a PC serial port and power up.
See the dev kit manual for different power supply options.
2)
Check that AT commands are working using EZURiO terminal. (Refer to blu2i Quick Start
Guide if needed)
3)
Run the “ATI3” command to find out the firmware release number. If it is less than
V9_20_22, contact EZURiO to get a firmware upgrade for the BISM II. (Note: older
versions of firmware will work, but audio output will be at half the full volume and the
ats589=7 command will not be recognised)
4)
Power down, plug the codec board into the dev kit and power up. Check that AT
commands are working.
APN_06002_1v03 Winbond Audio Board Application Note
4