Am Dienstag, 19. September 2006 11:27 schrieb Takashi Iwai: > At Fri, 15 Sep 2006 21:11:03 +0200, > First you should make clear whether the codec chip is connected via > the vt1724's standard connection or 3-wired SPI connection via GPIO. > The most boards use the latter method while pontis board uses the > former. In the latter case, the address is usually 2 bit, so you can > do a wild guess more easily. I figured out that the WM8766 is connected through a 3-wired SPI-connection. I also figured out that the GPIOs 16,17,18 are used. pontis.c already includes a SPI-implementation, but according to the WM8766 specs (look at wolfsonmico.com) this device does not await an address, but only 2 bytes of data: register address/values. Actually trying to initializing the chip leads to silence, in comparison to the noise coming out before, when the chip was in default mode. I assume that there must be some timing problem with the data-transmission or similiar. I will do some more testing today. Maybe I'll send in a patch if I can't find a problem, anyway. -Julian ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
