Content originally posted in LPCWare by nickuse on Fri Sep 07 10:02:05 MST 2012
Dear All,
I download example code that is AN11232.
I try to running the HID+MSC+CDC example on LPC11U14.
but , it's always stop at SystemInit().
In function SystemInit()
....
LPC_SYSCON->USBPLLCLKUEN = 0x01; /* Update Clock Source */
LPC_SYSCON->USBPLLCLKUEN = 0x00; /* Toggle Update Register */
LPC_SYSCON->USBPLLCLKUEN = 0x01;
while (!(LPC_SYSCON->USBPLLCLKUEN & 0x01)); /* Wait Until Updated */
LPC_SYSCON->USBPLLCTRL = USBPLLCTRL_Val;
while (!(LPC_SYSCON->USBPLLSTAT & 0x01)); /* Wait Until PLL Locked */ <------ stop there
....
The program always stop there, seems USB PLL cannot be locked.
Could you help me to solve this problem?
