If you look at Board Control Status Register 2 of the LITE DW you will see that bit 21 allows you to route PA7 to PC15. This allows you to apply a 1KHz signal on PC15. The microcode patch uses this 1KHz signal to generate an SOF.
-----Original Message----- From: curt brune [mailto:[EMAIL PROTECTED] Sent: Monday, March 24, 2003 9:10 PM To: Linuxppc-Embedded (E-mail) Subject: USB on RPXLite-DW w/ ppc-823e + ELDK Hello, I am trying to get USB working on an RPXLite board with a 823e processor. I am using the ELDK 2.4.4 kernel from CVS -- in arch/ppc/8xx_io/ I see several files (uart.c, micropatch.c, etc.) that depend on CONFIG_USB_MPC8xxx, but I do not see how to set CONFIG_USB_MPC8xxx from "make menuconfig". I am also wondering about a potential hardware modification required to make the USB work on the RPXLite -- from a previous posting to this list I read: > The 823e, and newer 850 (Rev. B) processors have some modifications > to better allow USB host support. These require some external > support (looping a clock back to the I/O pin) and the downloading of > a microcode patch for properly generating SOF timing. Is this modification still necesarry? Does anyone know the details? Cheers, Curt ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
