2006-06-20 10:53:14     AD1854 Audio Out on BF537 EZLITE

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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

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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

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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

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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

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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

 

 

 

 

 

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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

 

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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

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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

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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.

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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

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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

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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

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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!

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