problems with data passing in WM8731

Quartus 10 is good. so u r using 2 wire mode program.. hmm, did u set csb to the ground? or is that PUSHB[1] represent the csb itself?

Here is one thing, I dont use slave mode because in this mode , u r going to need to take care of the clock very well. I tried before, but, in the end I would prefer to choose master mode since i do not need to create clock divider to distribute the clock rate from AUD_XCK. One less problem there. I dont see any problems regarding about your I2C data. It seems good.

I ll need to look again at my project, its been long(almost a year) because recently I am doing layout design. =="...

by the way, check ur pin assignment carefully before you download it into the FPGA.