Hi，
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
To provide the fastest possible support, I'd highly recommend you refer to the iled_blinky demo which resides ~\boards\evkbimxrt1050\demo_apps\led_blinky of SDK library, as the demo shows how to use the systick timer.
Further, the download link of the SDK library for the MIMXRT1050 is attached below.
https://mcuxpresso.nxp.com/en/welcome
Have a great day,
TIC
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