St100 Board Self-Test Command - Globalstar ST100 User Manual

8545-0194-01 v1.0

4.3. ST100 BOARD SELF-TEST COMMAND

This command is used to initiate an internal self-test of the ST100 BOARD. When this command is received by the ST100 board,
there will be a 2 - 5 second delay before the response is returned (self-test in progress).
Note that as a binary command to the ASIC, this is specifically a self-test of the ASIC. The following operations are tested:
• A test transmission is sent, testing the transmitter and oscillator operation from end to end.
• The GPS is powered up and checked that it is generating correctly formatted and readable NMEA messages. As the "view of
the sky" cannot be known, only communication to the GPS is tested, not signal strengths.
• The I2C link to the Accelerometer is tested for proper communication to the accelerometer.
• NOTE: If the custom hardware configuration is ordered wherein the accelerometer is connected to the Nordic processor
rather than to the ASIC processor, this portion of the self-test will indicate a fail.
BYTE BITS
0 0 - 7
1 0 - 7
2 0 - 7
3 0 - 7
4-5 0 - 15
Example Command: AA 06 FD 0E 9A 71
BYTE BITS
0 0 - 7
1 0 - 7
2 0 - 7
3 0 - 7
4 0 - 7
5-6 0 - 15
ST100 User Manual v1
SELF-TEST COMMAND
PARAMETER
Leader
Length
Command Code
Sub Command Code
CRC
TRANSMITTER SELF-TEST RESPONSE
PARAMETER
Leader
Length
Command Code
Sub Command Code
Result Code
CRC
Confidential & Proprietary Information
DESCRIPTION
Always a value of 0xAA
0x06
0xFD
0x0E (Perform Self Test)
DESCRIPTION
Always a value of 0xAA
0x07
0xFD
0x0E (Perform Self-Test)
The following bit flags indicate a pass or fail of each subsystem.
0x01 = Transmitter (0 = failed 1 = passed)
0x02 = GPS (0 = failed 1 = passed)
0x04 = Accelerometer (0 = failed 1 = passed)
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