Hello,
I'm trying to hash through application XAPP806 "Determining the Optimal DCM Phase Shift for the DDR Feedback Clock" as an exercise in MicroBlaze, EDK, BSB, Platformw Studio, XPS, whatever.
About page 3 the document ask you to set up a
2 bit GPIO. I'm not sure why it needs to be bidirectional. These bits are to be the controls to the variable phase delay in the clock feedback loop.Being a novice with this Platform Studio, I don't know how to do this. In the BSB wizard under add peripherals, all I have are OPB BRAM IF CNTLR, OPB TIMEBASE WDT, and OPB TIMER options. I am running an 7.1 EDK and the author of the document, Norbert Melnikov, did not state what he was using.
So the short question is where do I find the generic GPIO pcore? The application note implied that the number of bits was selectable.
Does the P in pcores stand for peripheral? Are pcores the way ISE projects can join the XPS environment?
Thanks,
Brad Smallridge Ai Vision