AnsweredAssumed Answered

K60 USB device code not working

Question asked by RN . on May 7, 2012
Latest reply on May 8, 2012 by Gavin Li

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

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