Hi Erik
You can find FlexTimer and PIT single-shot references in the Open Source uTasker project for KEA128 (including timer simulation in Visual Studio).
http://www.utasker.com/docs/uTasker/uTaskerHWTimers.PDF
Attached are two binaries for FRDM and TRK board that show a single shot timer interrupt (FlexTimer) toggling an LED (red on FRDM, second blue one on TRK). Each time it fires it increases the time by 100us and repeats so that the toggling gets slower the longer it runs for.
There is a command line interface on the OpenSDA VCOM at 115200 Baud - in the I/O menu there are commands to read memory so you can view the timer setup if required.
Regards
Mark

Kinetis: http://www.utasker.com/kinetis.html
Kinetis KEA128:
- http://www.utasker.com/kinetis/TRK-KEA128.html
- http://www.utasker.com/kinetis/FRDM-KEAZ128Q80.html
S32 Design Studio: http://www.utasker.com/kinetis/compilers.html#S32
Free Open Source solution: https://github.com/uTasker/uTasker-Kinetis
Working project in 15 minutes video: https://youtu.be/K8ScSgpgQ6M
For better, faster, cheaper product developments consider the uTasker developer's version, professional Kinetis support, one-on-one training and complete fast-track project solutions to set you apart from the herd : http://www.utasker.com/support.html