On 09/07/2007 10:34 AM, Krzysztof Helt wrote: > According to a datasheet, the AD1848K (which was a popular version of > AD1848) is full-duplex (can work in single-dma mode or with two dma > channels). Yes, I see... > The AD1848 in my SC-6000 is not the K version (at least it is not marked > on the chip) but I saw a photo on the net with SC-6000 and AD1848K (it > had no YMF-262 chip but a different one). > > I am looking for the AD1848 datasheet for the pre-K version (or list of > differences between K and earlier versions). Can also only find the K datasheet. Not sure what's up with that -- the existing ad1848 driver is simplex only. > Also, I would like to know how you put your SG card into full-duplex > mode. That may be the easiest test yes. Try setting bit 2 of mss_config (| 4). This seems to be the generic way to enable duplex on mss/wss and it works here. The capture channel is fixed for a fiven playback channel: P = 0 ==> C = 1 P = 1 ==> C = 0 P = 3 ==> C = 0 By the way -- I'm running into a bug somewhere in cs4231_lib where sometimes the playback IRQ stops firing when you start a capture. Stopping both the capture and playback and then re-starting the playback works, after which things may or may not hang again at re-starting the capture. Could also be a hardware bug I guess -- will need to test further again (sigh). But just in case you'd also run into this, don't give up on ful-duplex if it only sometimes doesn't work right, as there might very well be a bug lurking in cs4231_lib. (bug cannot be in my own code, as that's just setup and nowhere to be found anymore when things are running). Rene. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
