Hello, On Fri, Sep 29, 2006 at 11:32:17PM +0100, Jochen Voss wrote: > 1. Input channels: > > [...] > > It would be nice if the ALSA driver would get a control to select > the input channel (it just needs to allow to set the lower three > bits of register 0x01). This should be easy. The patch I sent separately solves this problem. > 2. PT2258 Volume Controller: > > [...] > > So we can control this volume controller by playing with GPIO 6 and > 7. This project will be a bit more challenging. One has to shift > the data to the chip bit by bit, we have to use pin 6 as the clock > (max 100kbit/s), pin 7 is only allowed to change while 6 is low and > the chip read the data while 6 is high. After every byte the chips > sends back one acknoledge bit. And the chip wants a 200ms delay > after power up. The data sheet is at > > http://www.princeton.com.tw/webSite/downloadprocess/downloadfile.asp?mydownload=PT2258_2.pdf > > It would be nice if the ALSA driver would allow access to these > volume controls. I will need a bit of help with this. Is there any driver which implements a similar serial protocol which I could look at to learn how to do this? Many thanks, Jochen -- http://seehuhn.de/
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