Sorry, but I don't know how (or where) I should see "BCLK and LRCLK toggling".
I don't have a USB analyzer.
I succeed to see threads anc backtrace:
C:\Users\User\Desktop>xgdb app_usb_aud_xk_216_mc_2i10o10xxxxxx.xe
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..
(gdb) connect
0x00040000 in _start ()
(gdb) run
Loading setup image to XCore 0
Loading section .text, size 0x18c lma 0x40000
Loading section .cp.rodata, size 0x18 lma 0x4018c
Loading section .dp.data, size 0x1c lma 0x401a4
Start address 0x40000, load size 448
Transfer rate: 29 KB/sec, 149 bytes/write.
Loading setup image to XCore 1
Loading section .text, size 0x40 lma 0x40000
Loading section .cp.rodata, size 0x18 lma 0x40040
Loading section .dp.data, size 0x8 lma 0x40058
Start address 0x40000, load size 96
Transfer rate: 768 bits in <1 sec, 32 bytes/write.
First stage multi-node boot started
First stage multi-node boot completed
Loading application image to XCore 0
Loading section .crt, size 0xac lma 0x40000
Loading section .init, size 0x1a lma 0x400ac
Loading section .fini, size 0x2e lma 0x400c6
Loading section .text, size 0x3b2c lma 0x400f4
Loading section .eh_frame, size 0x24 lma 0x43c20
Loading section .cp.rodata, size 0x32 lma 0x43c44
Loading section .cp.rodata.4, size 0x2a0 lma 0x43c78
Loading section .cp.const4, size 0x3c lma 0x43f18
Loading section .cp.rodata.cst4, size 0x94 lma 0x43f54
Loading section .ctors, size 0x3c lma 0x43fe8
Loading section .dtors, size 0x3c lma 0x44024
Loading section .dp.data, size 0x508 lma 0x44060
Loading section .dp.data.4, size 0x30 lma 0x44568
Loading section .dp.rodata, size 0x20 lma 0x44598
Loading section .dp.rodata.4, size 0x40 lma 0x445b8
Start address 0x40000, load size 17910
Transfer rate: 141 KB/sec, 1194 bytes/write.
Loading application image to XCore 1
Loading section .crt, size 0xac lma 0x40000
Loading section .init, size 0x1a lma 0x400ac
Loading section .fini, size 0x2e lma 0x400c6
Loading section .text, size 0x572c lma 0x40100
Loading section .eh_frame, size 0x24 lma 0x45830
Loading section .cp.rodata, size 0x72 lma 0x45858
Loading section .cp.rodata.4, size 0x4c lma 0x458cc
Loading section .cp.const4, size 0x40 lma 0x45918
Loading section .cp.rodata.const4, size 0x4 lma 0x45958
Loading section .cp.rodata.cst4, size 0x78 lma 0x4595c
Loading section .cp.rodata.string, size 0xdd lma 0x459d4
Loading section .ctors, size 0x3c lma 0x45ab4
Loading section .dtors, size 0x3c lma 0x45af0
Loading section .dp.data, size 0x808 lma 0x45b30
Loading section .dp.data.4, size 0x4c lma 0x46338
Loading section .dp.rodata.4, size 0x3c lma 0x46384
Start address 0x40000, load size 25507
Transfer rate: 159 KB/sec, 1594 bytes/write.
Program received signal SIGINT, Interrupt.
deliver (divide=0, curSamFreq=0, c_out=<value optimized out>, c_spd_out=<value optimized out>, c_adc=<value optimized out>)
at C:/Users/User/Desktop/XK-AUDIO-216-MC-AB/Prova/module_usb_audio/audio.xc:727
727 asm volatile("in %0, res[%1]" : "=r"(sample) : "r"(p_i2s_adc[index++]));
(gdb) info threads
6 tile[1] core[3] 0x0004414e in XUD_Manager ()
5 tile[1] core[2] XUD_GetSetupData_Retry () at C:/Users/User/Desktop/XK-AUDIO-216-MC-AB/Prova/module_xud/src/XUD_EpFuncs.S:41
4 tile[1] core[1] (dual issue) buffer (c_aud_out=2147681794, c_aud_in=2147683330, c_sof=2147681282, c_aud_ctl=2147684098, p_off_mclk=<value optimized out>,
c_hid=2147682818) at C:/Users/User/Desktop/XK-AUDIO-216-MC-AB/Prova/module_usb_audio/usb_buffer/usb_buffer.xc:732
3 tile[1] core[0] (dual issue) decouple (c_mix_out=2147680258) at C:/Users/User/Desktop/XK-AUDIO-216-MC-AB/Prova/module_usb_audio/usb_buffer/decouple.xc:911
2 tile[0] core[1] (dual issue) mixer1 (c_host=2147614722, c_mix_ctl=2147614978, c_mixer2=2147615490)
at C:/Users/User/Desktop/XK-AUDIO-216-MC-AB/Prova/module_usb_audio/mixer/mixer.xc:363
* 1 tile[0] core[0] (dual issue) deliver (divide=0, curSamFreq=0, c_out=<value optimized out>, c_spd_out=<value optimized out>, c_adc=<value optimized out>)
at C:/Users/User/Desktop/XK-AUDIO-216-MC-AB/Prova/module_usb_audio/audio.xc:727
(gdb)