ONLY USE S/PDIF Transmitter IN adsp21565？

Hi,

There is an example code for SPDIF in ADSP-21569 BSP, could you please refer that code for SPDIF configuration which may helpful for your application. Please find the BSP link below
download.analog.com/.../ADI_EV-2156x_EZ-KIT-Rel1.0.1.exe

Path: \Analog Devices\EV-2156x_EZ-KIT-Rel1.0.1\EV-2156x_EZ-KIT\Examples\drivers\adc\SPDIF_ASRC_DAC_AudioPassthrough

Also, for further assistance, please explain more about what issue you're facing ?

Regards,
Divya.P

 i dont  need to use DAC and ASRC AND I JUST WANT ONLY USE SPDIF (the route: sport3B(tx)---------SPDIF TX0 (tx) ---------DAI0_PIN08(TX))  IT IS RIGHT?

Hi,

Apologies for the delay

Regarding "I want ONLY use  S/PDIF Transmitte  in adsp21565 and i encount some issue "

>> Could you please explain the issue your facing, so that it will be helpful to assist you better on the configurations.

Regards,

Divya.P

When playing music, the oscilloscope measures the pins （DAI0_08), showing a waveform at around 2.0MHz. Even when music playback stops, the oscilloscope still displays a waveform, but it's at 1.5MHz. I connected the pins（DAI0_08) TAHT WITH RAC connector to a computer using a device, attempted to record audio on the computer, but there was no audio output.

I assure you that the device （IT IS used to connect PC and RAC) is functioning properly.

I can record audio now, but there is some distortion and a lot of background noise.

so what should i do to address this  issue （the output left channel audio with noise，and right channel audio is worse than  left channel audio)

Hi,

From the given configuration, seems you are using the same PCG (PCG_Device_B) to provide clock for both SPDIF_TX_CLK and SPDIF_TX_HFCLK. As shown in the image HFCLK should be 256xFS ,it should not be the same as SPDIF_TX_CLK.  So please configure the HCLK as per the below condition and try configuring with different PCGs for each clock.

Please refer the below application note which discusses briefly about SPDIF,
https://www.analog.com/media/en/technical-documentation/application-notes/ee.266.rev.2.08.07.pdf

Also, Are you using 16 bit Data or 32 bit Data could you please confirm this?

Regards,
Divya.P

thank for your  reply

but the issue（the output left channel audio with noise，and right channel audio is worse than  left channel audio) is still exist。

 1 the next is my update setting:

pcg B clk:3.072MHz

pcg A clk:12.288MHz

pcg B FS:48KHZ

2. adi_sport_ConfigData.nWordLength only in 23 or 24,the device can record audio( with noise).

3 how  to set an right value about adi_sport_ConfigClock.nClockRatio and  adi_sport_ConfigFrameSync.nFsDivisor , and what other sport api  should be set exclude adi_sport_ConfigMC ,adi_sport_SelectChannel,adi_sport_ConfigClock ,adi_sport_ConfigData

4 some thing meke me confused when adi_sport_Open.ADI_SPORT_MODE is  ADI_SPORT_MC_MODE , the  device can record audio( with noise).

5 i only ste the api about spdif TX that adi_spdif_Tx_Open and adi_spdif_Tx_Enable, what other spdif tx api  should be set?

Finally, do you have any other contact information? I want to resolve this issue quickly. Thank you

32 bit data