GPS RECEIVER SOFTWARE UPLOAD

1
GPS RECEIVER SOFTWARE UPLOAD

• GPS BLACKJACK RECEIVER OPERATION IS HIGHLY
  AUTONOMOUS RESETING ITSELF AUTOMATICALLY IN
  RESPONSE TO A TRACKING PROBLEM OR SINGLE EVENT
  UPSETS. HOWEVER, IF NECESSARY, SOFTWARE UPLOADS
  CAN BE ACCOMPLISHED IN EITHER PROM MONITOR (BEEP)
  OR IN TRACKING MODE.

2
PROM MONITOR (BEEP) MODE

• COMMAND "BEEP" MODE INHIBITS NORMAL RECEIVER
  OPERATION
• SEND UPLOAD COMMAND
• UPLOAD FILE CONTAINS WRAPPED PACKETS
• PERFORMS DATA INTEGRITY CHECKS, STORES DATA IN
  RAM, AND THEN LOADS INTO FLASH MEMORY.
• SEND RESET COMMAND WITHIN 24 HOURS TO EXECUTE
  THE NEW UPLOAD.

3
TRACKING MODE

• SEND UPLOAD COMMAND
• SEND IMAGE SOFTWARE COMMANDS.
• PACKETS ACKNOWLEDGED AND STORED IN FLASH MEMORY
  (AUXILIARY AREA) UNTIL ENTIRE UPLOAD IS RECEIVED.
• RECEIVER OPERATES NORMALLY DURING THE ENTIRE
  UPLOADING PROCESS.
• LIBRARY CURRENTLY RUNNING REPLACED IN FLASH.
  AUXILIARY AREA ERASED.

4
TRACKING MODE(continued)

• RESETS REQUIRE RESTART AT ANY POINT PRIOR TO THE
  RESET.
• UPLOAD PROCESS TOLERATES INTERRUPTION AND RESUMES
  WHERE LEFT OFF.
• INTERLEAVE UPLOADS FROM DIFFERENT LIBRARIES
  POSSIBLE.
• SEND RESET COMMAND TO EXECUTE NEW CODE.