Factory Test Procedure - Kauai Labs VMX-pi User Manual

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Updating Firmware
vmx-pi_X.Y.ZZZ.hex
(X = Major Version Number Y = Minor Version Number Z = Revision Number)
1. Press and hold down the "CAL" button on the VMX-pi circuit board. While holding this
button down, connect a USB-micro cable from a Windows PC to the VMX-pi circuit
board. Use the micro-usb connector immediately to the left of the VMX-pi power
connector. Applying power when the "CAL" button is held down places the board into
"bootloader" mode, at which point the firmware can be loaded.
2. From your Start Menu, select "Kauai Labs" and then click on the VMXFirmwareUpdater
menu item, and follow the directions included in the program.
3. Once you have downloaded the firmware, you can use the "Currently-loaded Firmware
Version" tab of the VMXFirmwareUpdater to verify the version number you have just
installed.
The VMX-pi Factory Test Procedure verifies correct operation of the circuit board and it's key
components. The VMX-pi Factory Test Procedure is performed in the factory to verify initial
correct operation, and may be run at any later point in time to re-verify correct operation.
Test Procedure
1. Press the "Reset" button on the board to begin executing the firmware self-tests
Test1 (Reset Button Test): Verify that the "RESET" button successfully causes
the software to restart
Test2 (Orange/Green LED Test): Verify all LEDs are working. The Orange
"CAL" Led and the two Green "S1" and "S2" LEDs should turn on briefly after
the firmware restarts.
Test3 (MPU-9250 Sensor Selftest): Sensor Selftest. NOTE: The circuit must
be still, and it must have the top of the circuit board pointing directly up
(away from the earth), in order to pass successfully. The first time (and only
the first time) the board is started after firmware is reloaded, a self-test will run
(for approximately 5 seconds). If this succeeds, proceed to Test 8. If this fails,
the "CAL" Led will continue to flash quickly, and the selftest will be run again
until it passes. If it succeeds, the software will proceed automatically to Test 8
(see below).

Factory Test Procedure

Failure indicates a problem w/the "RESET" button or associated pull-up
resistor.
Failure indicates a problem w/one or more of the LEDs or their
corresponding current-limiting resistors.
There are two possible reasons for failure of the self test:
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