On Fri, Oct 16, 2009 at 12:44 PM, Jeff Angielski <j...@theptrgroup.com> wrote: > > We are using the Cypress USB Host (CY7C67300) with a Freescale MPC8544 and > can only get it to work if we add a delay after writing to the hardware > registers through the HPI. > > We tried playing with the SCY settings in the GPCM but nothing helps. It is > only when we add usecs of delay after our write() functions that the > hardware works. > > The datasheets make no mention of any write-then-read requirements and the > FAEs are stumped right now. > > I was just hoping somebody had some experiencing interfacing this chip to > the PowerPC and that they could offer some suggestions or ideas.
I've worked with the part attached to the ppc440 inside a Xilinx FPGA. Though I ran into many problems, I haven't seen the problem that you describe. Sorry. g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
