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NXP^TM LPC2XXX and LPC17XX / USB Port # 2 trouble - LPC 2378

« on: December 13, 2007, 12:30:52 AM »

Hey Guys-
 
   I am using Keil''s Demo board MCB2300 on which the USB port used is port # 1 However, on our alpha boards we have hooked up USB Port # 2 for USB communication.

However, I am not able to get the port up and running, even after setting register

  PCONP |= 0x80000000;                    /* USB PCLK -> enable USB Per.  */

  OTG_CLK_CTRL = 0x12;                     /* Dev clock, AHB clock enable  */
  while ((OTG_CLK_STAT & 0x12) != 0x12);

  OTG_CLK_CTRL = (OTG_CLK_STAT | 0x8);                     /* Dev clock, AHB clock enable  */
  while ((OTG_CLK_STAT & (0x1a)) != (0x1a)); 

  USBPortSel = 0x03;

  while (USBPortSel != 0x03)
       USBPortSel = 0x03;

I have read the manual several times, and I do not think I am missing anything. But it maybe possible that I am missing some bit or register somewhere.

However, the same code works if I enable USB Port # 1.

thanx
Vrajesh