I'm developing an application which uses the High speed USB in device mode from the Kinetis 66. I based my code on the CDC + MSC lite example code from the MCUXpresso SDK.
I got it to build in our custom environment (after removing the MSC part, I don't need it). But the processor gets stuck in the APPInit, when it is checking for the USBPHY PLL to lock (function bool CLOCK_EnableUsbhs0PhyPllClock(clock_usb_phy_src_t src, uint32_t freq)).
I've found several topics covering the issue, and walked through them:
- we use the xtal mode, not extosc, so no ERRATA_ID_9712 dependency (https://community.nxp.com/message/852272)
- correct xtal (16 MHz)
- I have a correct voltage on USB VREG pin (3v3) delivered from VREG_IN1 and VREG_IN0
- all assert() statements in the beginning of the function checked out correctly
-- 32k is running
I didn't check any runmode in previous init routines, but can they interfere with the settings introduced in this function, stopping the PLL to lock?