Digilent Pmod I2S2 test

[NelsonWee88]

Hello. Would like to use notebook audio in/out (mic/headphones or speaker) to test Pmod i2s2 loop back test ? Is there any such example to pump notebook audio out to pmod i2s2 linein

and loopback 12-pin pmod connector loop-back , then pmod i2s2 lineout to notebook audio in or mic input ? Some sort of simple loopback test ?

Regards.

[jpeyron]

Hi @NelsonWee88,

The Pmod I2S2 's resource center here has an FPGA IP Core example for different FPGA boards.  What development board are you using.

thank you,

Jon

[NelsonWee88]

Hello Jon,

Using Trenz TE0630 Fpga module with carrier board (FPGA Module with Spartan-6 LX150). Can we just have simple test just for Pmod i2s2 module alone (set freq for LRCK

and sclk , then monitor with oscilloscope) ?

And what the difference if pmod use as master or slave ?

Lastly could we do simple test (attachment pdf. Set mode as master . Then provide MCLK (LineIn) , connect A/D LRCK n SCLK to D/A LRCK n SCLK). Sinewave input to  line-in  input and monitor line-out output with oscilloscope ?

 

Regards.

testpmodi2s2.pdf

[NelsonWee88]

Hello. If we use microphone line-in to input voice to pmod i2s2 (with given mclk 22.579MHz , sclk 2.822 MHz and lrck 44kHz) and pass-thru to pmod line out to headphone.

Is it strong enough (our voice) to enable pass thru ?

i2s2.pdf

[jpeyron]

Hi @NelsonWee88,

Here is a verilog pass through project for the PmodI2S2 that should be helpful.  It uses a 22.521 MHz clock made by the clocking wizard. So I believe that the 22.521 MHz is strong enough to enable pass thru.

thank you,

Jon