2006-06-20 10:53:14 AD1854 Audio Out on BF537 EZLITE
Falk Hatzfeld (GERMANY)
Message: 9182 Compared to the 537 STAMP the 537 EZLITE has an audio DAC (and ADC) polulated. Is it possible to use this AD1854 with uClinux as well? (Driver / settings)?
Falk
QuoteReplyEditDelete
2006-06-20 11:01:10 RE: AD1854 Audio Out on BF537 EZLITE
ralf neuhaus (GERMANY)
Message: 9184 Hello Falk,
the trick is here to connect the SPI pins of the AD1854 to the SPI P9 pins of the EZ-KIt lite. Therfore you have to lift the AD1854 SPI pins, because these are pulled to ground. BTW. I am working on the driver and I
QuoteReplyEditDelete
2006-06-20 11:04:19 RE: AD1854 Audio Out on BF537 EZLITE
ralf neuhaus (GERMANY)
Message: 9185 ... I will finished it in a couple of days. The other thing is to use the AD1836 driver and you are able to stream data over SPORT but without control of the registers e.g. Mute, Volume etc..(SPI function is needed )
--Ralf
QuoteReplyEditDelete
2006-06-20 11:28:33 RE: AD1854 Audio Out on BF537 EZLITE
Falk Hatzfeld (GERMANY)
Message: 9187 hmm.. there are various settings for the 1836
So it might be difficult to find out the settings to use a 1854
TDM or I2S
3Stereo or 5.1
SPORT
SPI (ignore)
Seems to be the best to wait for your new driver and documentation. I guess the SPI has to be connected anyway which seem to be the pins CCLK CLATCH CDATA.
Thanks
Falk
QuoteReplyEditDelete
2006-06-20 12:07:53 RE: AD1854 Audio Out on BF537 EZLITE
ralf neuhaus (GERMANY)
Message: 9192 Hi
the AD1854 Pins DPM0 and DPM1 -> I2S,
CDATA, CLATCH and CCLK -> SPI connect to P9 jack on EZ-Kit,
no 3Stereo or 5.1 functionality for the AD1854
QuoteReplyEditDelete
2006-06-20 14:27:33 RE: AD1854 Audio Out on BF537 EZLITE
Falk Hatzfeld (GERMANY)
Message: 9204 So if I get you and the schematics / data sheets right I will pull down IDPM1 (allready is)
pull up IDPM0 (is there too) to select I2S mode.
The chip is properly connected to sport 0.
CCLK goes SPI_SCK CLATCH to SPI_SSEL4 and CDATA to SPI_MOSI
QuoteReplyEditDelete
2007-04-28 15:43:07 RE: AD1854 Audio Out on BF EZLITE
renjith kumar (INDIA)
Message: 25027 hi all,
If any body has made a Driver for Audio 1854 ,
please help me to get it.
I have a bf561 connected to 1854 Audio chip through, SPI and SPORT.
Regards ,
Renjith
QuoteReplyEditDelete
2008-10-10 10:14:29 RE: AD1854 Audio Out on BF537 EZLITE
Henrik Karlsson (SWEDEN)
Message: 63417
Two years later....
Does anybody know the progress of the AD1854 driver?
// Henrik
QuoteReplyEditDelete
2008-10-10 10:26:09 RE: AD1854 Audio Out on BF537 EZLITE
Appalayagari Sreedhar (INDIA)
Message: 63418
Hi,
Its pretty simple DAC with only 2 registers interfaced with SPI.
Try it yourself it will be easy to implement.
Best Regards, Sreedhar.
QuoteReplyEditDelete
2008-10-10 10:37:21 RE: AD1854 Audio Out on BF537 EZLITE
Robin Getz (UNITED STATES)
Message: 63421
Henrik:
No one uses that audio configuration in production - so we have not spent any time on it.
The AD1836 I2S driver seems to work fine (according to some).
-Robin
QuoteReplyEditDelete
2008-10-13 04:26:13 RE: AD1854 Audio Out on BF537 EZLITE
Henrik Karlsson (SWEDEN)
Message: 63531
Thanks guys!
Robin: Hmm, I'll check that out! On the other hand, I could use a driver implementation execise.
// Henrik
QuoteReplyEditDelete
2008-10-13 05:21:40 RE: AD1854 Audio Out on BF537 EZLITE
Lars Weber Rasmussen (DENMARK)
Message: 63533
Hi Henrik!
The AD1854 is a simple dac which only needs a I2S dataport. You can use the AD1836 driver in I2S mode and get audio out. You wont be able to use the ADC on the EZ-kit.
BR
Lars
QuoteReplyEditDelete
2008-10-13 11:25:18 RE: AD1854 Audio Out on BF537 EZLITE
Henrik Karlsson (SWEDEN)
Message: 63563
That was exactly what I did. I did a very small hack in the driver for AD1836 (in the init the driver checks if the ad1836 board is connected by talking with it over SPI) I removed that check, and just to be on the safe side, I removed the other two SPI read/writes as well) and it worked like a charm!