HardFault when enabling usb_dump()

[dturner]

When I uncomment the following line in main.c:

usb_dump()

I get the following output over UART:

====== Freescale Freedom FRDM-KL25Z
Built: Sep  8 2017 23:15:55

Reset code: 0x00 0x04
Heap:  0x20000028 to 0x20001000 (4056 bytes used)
Stack: 0x20002fe7 to 0x20003000 (25 bytes used)
8167 bytes free
monitor> 
Inp** HARD FAULT **
  pc=0xe00
  msp=0x20002fb8
  psp=0xffff7f7c`

The LED then blinks RED slowly on and off.

[payne92]

Thanks for your note. usb_dump() is commented out because the USB code is unfinished, unstable and a work in progress. From the comments in usb.c:

// *******************************************************
//  TODO:  INCOMPLETE, work in progress
// *******************************************************

I wish it was further along, but the USB hardware is poorly documented by Freescale, aspects are undocumented, and getting stable USB code requires a lot more work.