Thanks Murali,

Any special consideration for using this driver with VDK?

Regards,

Yair

Hello Murali,

With VDK, should I use Deferred Callbacks with this driver, or can I used live callbacks?

Thanks,

Yair

Hi Murali,

I build the example successfully, and tried to run it on the board. I have board Rev 0.2

I got the following message on the console:

Loading: "C:\Users\EarsForMe\BF-Examples\Drivers\AudioCodec\Audio_Loopback\Debug\Audio_Loopback.dxe"...

Load complete.

ADI SSM2602 as Master device in USB Mode

Audio Loopback example with Line-In as record source

Set SW2:  1(ON),  2(ON)

Set SW5:  1(OFF), 2(OFF), 3(ON),  4(OFF), 5(ON),  6(ON)

Set SW15: 1(ON),  2(ON),  3(ON),  4(ON),  5(ON),  6(ON), 7(ON)

Set SW22: 1(OFF), 2(OFF), 3(OFF), 4(OFF), 5(OFF), 6(OFF)

Set SW23: 1(OFF), 2(OFF), 3(OFF), 4(OFF), 5(OFF), 6(OFF)

Failed to configure SSM2602 register fields, Error Code: 0x40000017

Program terminated abnormally with error code: 0x40000017

Looking at the code, I was that it uses the TWI interface. However, the board is configured by default to SPI interface.

Here are couple of discrepancies and issues I found with the switch settings:

SW5: You specify 6 switches; my board has only 4 switches.

According to the manual, SW16 controls the SPI/TWI connection to to the codec. By default, it specifies SPI connection.

I set it to TWI (according to the manual: OFF, OFF, OFF, ON, OFF, ON)

SW6, Positions 3, 4: Also, the default specifies SPI as the control interface; I set it to TWI (OFF, ON).

Regardless of these setup changes, I got the same error (0x40000017). From adi_dev.h: 0x0017 - TWI locked in other operation

Any ideas how can I make this sample code run correctly on the board?

Regards,

Yair

Looks like the code was indeed using TWI.

I changed the board settings to use SPI again, and modified the code to use SPI instead of TWI (by reading the examples in the driver manual).

Now the program runs correctly. I connected audio source to line in, and powered speakers to headphone out, and was able to hear the music.

I could only hear one channel though, but this might be a bad cable (or J5 connector), as when the cable was all the way in to J5, no audio was heard; when I wiggled the connector and took it out a bit, I heard the audio on both speakers, but the source was one side only.

Tomorrow I'll buy a new cable and try again.

Yair

Hi,

I just bought a new cable, but the result is the same.

When I insert the cable all the way in to J5 Line In, I hear no audio at the headphone output.

However, when I just insert part of the cable I hear the audio left channel on both outputs of the headphone.

I tested that there is connectivity between J5 Line input connector signals to FER2 and FER5 chokes at the input of the CODEC, and signal path is OK.

Any explanation to this phenomena? Is that software problem or a problem with my board?

Regards,

Yair

PS: I'm attaching my modified files (to enable using SPI instead of TWI). See previous messages.

Sorry for all the posts, but as I was wrapping up the session and pressed PB2, the program stopped running (as it should), but I was still listening to the music (left channel, as before).

So, probably, all the time I was able to hear something, it was via the loopback connections?

If that the case, than this program does not run as it should.

Any ideas how to fix that?

Again, I have Rev 0.2 of the ADSP-BF518 EZkit board.

Your help will be appreciated.

Regards,

Yair

Hi,

After close examination and looking at the schematics of the board, I made the following changes in the header file (for SPI mode):

/* SPI device connected to SSM2602 (SPI using PORTG MUX2 - so use the virtual SPI device number (device 0))*/

#define     SPI_DEVICE_NUMBER         0

/* SPI Chipselect connected to SSM2602 (SPISEL3) */

#define     SSM2602_SPI_CS             3

I changed the device number from 1 to 0, and CS to 3. Now it works like charm.

I assume the reason it does not work with TWI mode is wrong setup too.

Does the example program intended to run on the BF518 EZboard or another board?

Also: Can I use SPI CS3 and the Thumbwheel?

Thanks,

Yair

Hello Murali,

Thanks for your answer.

I was able to make the example work with TWI, so SPI0_CS3/CUD signal is now available for the thumbwheel.

Regards,

Yair