0x46 Request Radio UI

Radio 0x68 → GT 0x3b

The radio has limited control of the display in order to manage it’s own interface.

However, the radio is ultimately subserveant to the GT and it’s UI state will always be overridden by 0x45.

Related

• 0x37 Radio Tone/Select
• 0x45 Set Radio UI

Examples

68 04 3B 46 01 10
68 04 3B 46 02 13
68 04 3B 46 04 15
68 04 3B 46 08 19
68 04 3B 46 0C 1D
68 04 3B 46 0E 1F

Parameters

Fixed length. One byte bitfield.

PRIORITY      = 0b0000_0001
HIDE_HEADER   = 0b0000_0010
HIDE_BODY     = 0b0000_1100

Priority 0b0000_0001

PRIORITY_RAD  = 0
PRIORITY_GT   = 1

When set to 1, the radio is relinquishing the display.

When set to 0, the radio is managing it’s own display functions (outlined in Use Cases).

Note: the radio won’t ever set 0 of it’s own accord. When the radio is turned on, it will just assume control of the display and begin writing to it, at which point the GT is inherently aware of the radio being in the foreground.

Hide Header 0b0000_0010

HIDE_HEADER         = 0b0000_0010

Hide Body 0b0000_1100

HIDE_BODY_SELECT    = 0b0000_0100
HIDE_BODY_TONE      = 0b0000_1000
HIDE_BODY_MENU      = 0b0000_1100

Use Cases

Hide Tone

C23 BM

F0 04 68 48 04 D0           # TONE button: Press 
F0 04 68 48 84 50           # TONE button: Release
68 07 3B 37 80 00 00 10 F3  # Show Tone (and set parameters)
# Timeout...
68 04 3B 46 08 19           # Hide Tone

BM53

F0 04 68 48 04 D0           # TONE button: Press 
F0 04 68 48 84 50           # TONE button: Release
68 07 3B 37 90 10 01 01 E3  # Show Tone (and set parameters)
# Timeout...
68 04 3B 46 08 19           # Hide Tone
68 04 3B 46 0C 1D           # Hide Menu

Hide Select

C23 BM

F0 04 68 48 20 F4   # SELECT button: Press 
F0 04 68 48 A0 74   # SELECT button: Release
68 04 3B 37 40 20   # Show Select
# Timeout...
68 04 3B 46 04 15   # Hide Select

BM53

F0 05 FF 47 00 0F 42 # SELECT button: Press 
68 04 3B 37 04 64 # Show Select
F0 05 FF 47 00 8F C2 # SELECT button: Release
# Timeout...
68 04 3B 46 04 15 # Hide Select
68 04 3B 46 0C 1D # Hide Menu

Main Menu

A MENU press does not get sent to radio, but is broadcast, and instead handled by the GT 0x3b, which will in turn, message the radio 0x68, requesting it relegate itself to the background.

If the radio is on, but in the background, it will still write to the display for certain events (e.g. changing radio station, CD track etc), but will automatically return to the background after an ~8 second timeout.

GT will only send 0x45 if radio is on.

C23 BM

F0 04 FF 48 34 77   # MENU button: press
3B 04 68 45 01 13   # GT (legacy) requesting radio relinquish display
68 04 3B 46 01 10   # Radio relinquishing display

# Note the additional 0x45 bit set if Audio OBC enabled:
F0 04 FF 48 34 77
3B 04 68 45 03 11
68 04 3B 46 01 10

BM53

Similar to the C23 BM, however with one quirk- the BM53 sends 0x46 twice. (I suspect this is something to do with the updated UI.)

F0 04 FF 48 34 77   # MENU button press
3B 04 68 45 91 83   # GT (4-1/00) requesting radio relinquish foreground
68 04 3B 46 01 10   # Radio relinquishing foreground
68 04 3B 46 01 10   # Note: BM53 sends this command TWICE

Hide Overlay

When pressing the OVERLAY button, the radio relinquishes the display. The radio will still write titles, but automatically hide overlay again after ~8 seconds

Unlike a MENU button press, the OVERLAY button press is sent directly to the radio.

BM C23

F0 04 68 48 30 E4   # BMBT Overlay button press
68 04 3B 46 0E 1F   # Radio exits overlay mode

The radio will still write titles, but relinquish the display again after the timeout:

# Radio writes to display: "FM ☐101.1☐   "
68 12 3B 23 40 20 46 4D 20 03 31 30 31 2E 31 04 20 20 20 21

# 8 seconds pass...

# Radio automatically hides overlay
68 04 3B 46 0E 1F

BM53

Similar to C23 BM, but 0x46 is sent twice.

# BMBT Overlay button press
F0 04 68 48 30 E4

# Radio hides overlay
68 04 3B 46 02 13
68 04 3B 46 0C 1D

The BM53 will still write titles, but relinquish the display after a timeout.

# "☐ 90.7☐      "
68 12 3B 23 62 10 03 20 39 30 2E 37 04 20 20 20 20 20 20 27

# 8 seconds pass...

# Radio hides overlay
68 04 3B 46 02 13
68 04 3B 46 0C 1D

Radio Off

C23 BM

F0 04 68 48 06 D2   # POWER button: Press 
68 04 F0 4A 00 D6   # BMBT radio LED: Off
68 04 3B 46 0E 1F   # Hide Menu, Hide Header
F0 04 68 4B 05 D2   # Tape: none
F0 04 68 48 86 52   # POWER button: Release

BM53

F0 04 68 48 06 D2   # POWER button: press
68 04 F0 4A 00 D6   # BMBT radio LED: off
68 04 3B 46 0E 1F   # Hide Menu, Hide Header
F0 04 68 4B 05 D2   # Tape: none
F0 04 68 48 86 52   # POWER button: Release