GPS Node Display in rocketview

Note: Message IDs are described in the form DEFINED_MESSAGE_NAME = [16bit ID] = [11bit ID] [RTR] [length] [byte0] ... [byte7], where the 16bit ID is the 16 bit "packed value" of the ID (11 bits CAN ID + 1 bit RTR + 4 bits length).

If the data is unknown - for example, because no message has been received yet - then display a dash (-).

GPS Node ([-|Safe|Armed])

Lat:  [-|xx deg xx.xxx']N
Lon:  [-|xxx deg xx.xxx']W
Alt:  [-|[xx,xxx]m (xx,xxxft)]

Sats: [-/-|0/0]

Locked:   [-|Yes|No]
Solution: [-|OK|Propated|Alt. used|PM]
Validity: [-|OK|Alt. used|Num sats|EHPE|EVPE]

sequencer, running on the flight computer, takes the RAW binary GPS messages from the CAN bus and parses them into shorter messages for rocketview to display.

The GPS mode is set by GPS_REPORT_MODE = 4B10 = 258 0 1 [mode] where mode is:

0x34 = Safe
0x88 = Armed

Solution (the GPS solution type, or quality) is set by FC_GPS_NAVSOL byte 0 and byte 1 (which combine to make a 16 bit integer):

if bit 0 = 1 then display Propogated
if bit 1 = 1 then display Alt. used
if bit 3 = 1 then display PM
if bits 0, 1 and 3 are all 0 (we don't care about the other bits) then display OK

Validity (the validity of the solution) is set by FC_GPS_NAVSOL byte 2 and byte 3 (which combine to make a 16 bit integer):

if bit 0 = 1 then display Alt. used
if bit 2 = 1 then display <4 sats
if bit 3 = 1 then display EHPE
if bit 4 = 1 then display EVPE
if bits 0,2,3 and 4 are all 0 (we don't care about the other bits) then display OK

Locked (a summary of the type and validity of the solution) is set by:

If Solution is OK and validity is OK then display Yes else No

Is FC_GPS_TIME is used to display the time for the rocket in rocketview?

Lat is set by FC_GPS_LATLON (first 32 bits)

Lon is set by FC_GPS_LATLON (second 32 bits)

Alt is set by FC_GPS_HEIGHT (32 bits).

Sats (the number of satellites used over how many should be visible) is set by FC_GPS_SATS_VIS byte 0 / FC_GPS_SATS_USED byte 0