Hi all,
I have downloaded the USB device code provided by freescale developers to my Cortex M4 K60 board where i have not used any external pullups and MAX3353EEUE IC for the circuit,
i made few changes in the code, those are
1. Disabled weak pull downs ==> USB0_USBCTRL &= ~0x40;(Because DP line was detecting its Voltage up to +1.2V only) in USB.C
2. sellected Clock source as FLL insted of PLL in USB.H
3.defined NO_PLL_INIT = 1 in sysinit.C
my problems are
1.after running the program its contineously displays "Enter USB Reset handler"
please help me to solve this problem....
Thank you so much
We never get the USB working with FLL. you'd better use PEE mode.
Even don't try to use internal clock for UART, the baudrate difference is too big.