2021 Microchip Technology Inc. DS00003118C-Page 102
AN3118
APPENDIX T: CONCERT MODE
ENDLESS GROUPING
Endless grouping can use GAC (General Access
Code) and DAC (Dedicated Access Code) for
grouping. After “back to last mode”, the system can
undergo endless grouping so the central can connect a
new peripheral or previously connected peripheral.
FIGURE 116: CONCERT MODE ENDLESS GROUPING
After enabling the endless grouping, the "Endless
Grouping GAC Interval" and "Endless Grouping DAC
Interval" can be set as the following figure. The unit of
the interval is 5 seconds. For example, if the user sets
"2" for the GAC interval and sets "3" for the DAC
interval, there will be 10 seconds in the "General
grouping interval" and 15 seconds in the "Specific
Grouping Interval”.
FIGURE 117: MSPK SETUP WINDOW
Under Host mode, the UART command 0x4B is used to
set up GAC and DAC timing dynamically. The
command structure is "0x4B Role GAC-time DAC-
time." This command issues grouping action if GAC-
time or DAC-time are not all 0. If there is current
grouping action from the MMI action command (such
as E0/E1/E2/F6), current grouping action will be
replaced by 4B grouping action. Furthermore, this
command will cancel grouping action if GAC-time and
DAC-time are both 0. This command overwrites the
endless grouping configuration, which is configured by
the Config GUI Tool. For more information, refer to
AudioUARTCommdnSet_v2.08.
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