As my first step I tried to change the pins of the already implementet 8 PDM-microphones to the pins of external PDM microphones. So I could see if that works. But I can´t find out how to do that.
In the module_usb_audio is a file called pcm_pdm_mic.xc in which I found the following code:
Code: Select all
/* Hardware resources */ in port p_pdm_clk = PORT_PDM_CLK; in buffered port:32 p_pdm_mics = PORT_PDM_DATA; in port p_mclk = PORT_PDM_MCLK; clock pdmclk = on tile[PDM_TILE]: XS1_CLKBLK_3;
Thanks for any help!!