Request Data Output - Garmin Apollo SL30 COMM Installation Manual

Serial Interface Specifications
R D
EQUEST ATA
This input is used to request an output message to be sent by the SL30.
Message format:
"V".................Message class. This is a VHF NAV message.
"24"................Message identifier.
ii .....................Output identifier of requested message, two ASCII characters.
dd ...................Message data, two encoded hex
a......................Request type: (ASCII) "0" = output once; "L" = output repeatedly at low
Table 5 - Data Output Requests
ii Output
"20" Reset Status
"21" CDI, GSI, and Flags
"22" Decoded OBS Setting
"23" Radial from Active VOR
"24" Radial from Standby VOR
"25" Decoded Station Identifier
"28" Receiver Status
"29" NAV Audio Mode
"30" NAV Microcontroller
Software Version
"31" NAV DSP Software
Version
"32" ADC Data Output
"35" Comm Transceiver Status
"36" Comm Software Version
Example messages:
$PMRRV242100L<chksm><CR><LF>
Request periodic output of CDI, GSI, and related flags at low (1 Hz) rate.
$PMRRV2432050<chksm><CR><LF>
Request a single output of ADC data from channel 5.
3
Encoded hex: each character consists of 4 bits of data placed in the low order nibble +30h. For example, the 8-bit
value 5Fh would be encoded as two characters with values of 35h and 3Fh, which map to the ASCII characters "5"
and "?", respectively.
66
O
UTPUT
output request. Set to "00" if not needed. These characters are used for
such items as selecting a specific EEPROM address to output.
speed (1 Hz); "H" = output repeatedly at high speed (10 Hz).
Dd
"00"
"00"
"00"
"00"
"00"
"00"
"00"
"00"
"00"
"00"
cc
"00"
"00"
3
characters (30h-3Fh), used for specific
Data Description
ADC channel: "00" to "08"
Apollo SL30 Installation Manual
a
"0",
"0", "L", "H"
"0", "L", "H"
"0", "L", "H"
"0", "L"
"0", "L"
"0"
"0"
"0"
"0"
"0"
"0"
"0"