Moog Crossbow GNAV540 - Manual (Page 105)

GNAV540 User Manual
7430‐0808‐01 Rev. B Page 105
hardwareStatus Field
The hardwareStatus field contains flags that indicate various internal hardware conditions and alerts that are not
errors or problems. The hardwareStatus flag in the BITstatus field is the bit‐wise OR of the logical AND of the
hardwareStatus field and the hardwareStatusEnable field. The hardwareStatusEnable field is a bit mask that
enables selecting items of interest that will logically flow up to the masterStatus flag.
Table 89 hardwareStatus Field
hardwareStatus Field Bits Values
unlocked1PPS 0 0 = not asserted, 1 = asserted
unlockedInternalGPS 1 0 = not asserted, 1 = asserted
noDGPS 2 0 = DGPS lock, 1 = no DGPS
unlockedEEPROM 3 0=loc
enab
ked, WE disabled, 1=unlocked, WE
led
Reserved 4:15 N/A
comStatus Field
The comStatus field contains flags that indicate various external communication conditions and alerts that are not
errors or problems. The comStatus flag in the BITstatus field is the bit‐wise OR of the logical AND of the comStatus
field and the comStatusEnable field. The comStatusEnable field is a bit mask that enables selecting items of interest
that will logically flow up to the masterStatus flag.
Table 90 comStatus Field
comStatus Field Bits Values
noExternalGPS 0 0 = external GPS data is being receive
o external GPS data is available
d
1 = n
Reserved 1:15 N/A
SoftwareStatus Field
The softwareStatus field contains flags that indicate various software conditions and alerts that are not errors or
problems. The softwareStatus flag in the BITstatus field is the bit‐wise OR of the logical AND of the softwareStatus
field and the softwareStatusEnable field. The softwareStatusEnable field is a bit mask that enables selecting items of
interest that will logically flow up to the masterStatus flag.
Table 91 softwareStatus Field
softwareStatus Field Bits Values
algorithmInit 0 0 = normal, 1 = the algorithm is in ini
mode
tialization
highGain 1 0 = low gain mode, 1 high gain mode
attitudeOnlyAlgorithm 2 0 = navigation state tracking, 1 = attitude only
state tracking