TX2 I2S pin and recording problems

Calmcar-Bao · March 12, 2018, 10:24am

My I2S1 can play audio aplay test.wav
But connected to I2S2, no sound is played
Pins are as follows:
J26：
BCK --I2S1_LRCLK
LRCK–I2S1_CLK
DIN-- I2S1_SDIN
There are recording problems, executive instructions

arecord -c 2 -d 5 -r 48000 -f S16_LE test.wav

The logic analyzer detects that the MCLK BCK LRCK has a signal, but DIN has no signal. What is the reason?

Calmcar-Bao · March 13, 2018, 1:58am

Audio files are recorded, file size increases over time

nvidia@tegra-ubuntu:~$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 0: ADMAIF1 CIF ADMAIF1-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 1: ADMAIF2 CIF ADMAIF2-1 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 2: ADMAIF3 CIF ADMAIF3-2 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 3: ADMAIF4 CIF ADMAIF4-3 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 4: ADMAIF5 CIF ADMAIF5-4 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 5: ADMAIF6 CIF ADMAIF6-5 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 6: ADMAIF7 CIF ADMAIF7-6 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 7: ADMAIF8 CIF ADMAIF8-7 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 8: ADMAIF9 CIF ADMAIF9-8 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 9: ADMAIF10 CIF ADMAIF10-9 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 10: ADMAIF11 CIF ADMAIF11-10 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 11: ADMAIF12 CIF ADMAIF12-11 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 12: ADMAIF13 CIF ADMAIF13-12 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 13: ADMAIF14 CIF ADMAIF14-13 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 14: ADMAIF15 CIF ADMAIF15-14 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 15: ADMAIF16 CIF ADMAIF16-15 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 16: ADMAIF17 CIF ADMAIF17-16 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 17: ADMAIF18 CIF ADMAIF18-17 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 18: ADMAIF19 CIF ADMAIF19-18 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 19: ADMAIF20 CIF ADMAIF20-19 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 154: ADSP PCM1 ADSP-FE1-154 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: tegrasndt186ref [tegra-snd-t186ref-mobile-rt565x], device 155: ADSP PCM2 ADSP-FE2-155 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I use tx2 28.1

Calmcar-Bao · March 13, 2018, 2:00am

nvidia@tegra-ubuntu:~$ arecord -t wav -c 1 -d 5 -v test.wav
Recording WAVE 'test.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
Plug PCM: Rate conversion PCM (48000, sformat=U8)
Converter: libspeex (builtin)
Protocol version: 10002
Its setup is:
  stream       : CAPTURE
  access       : RW_INTERLEAVED
  format       : U8
  subformat    : STD
  channels     : 1
  rate         : 8000
  exact rate   : 8000 (8000/1)
  msbits       : 8
  buffer_size  : 2730
  period_size  : 682
  period_time  : 85333
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 682
  period_event : 0
  start_threshold  : 1
  stop_threshold   : 2730
  silence_threshold: 0
  silence_size : 0
  boundary     : 768426686420090880
Slave: Route conversion PCM (sformat=S8)
  Transformation table:
    0 <- 0*0.5 + 1*0.5
Its setup is:
  stream       : CAPTURE
  access       : MMAP_INTERLEAVED
  format       : U8
  subformat    : STD
  channels     : 1
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 8
  buffer_size  : 16384
  period_size  : 4096
  period_time  : 85333
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 4096
  period_event : 0
  start_threshold  : 6
  stop_threshold   : 16384
  silence_threshold: 0
  silence_size : 0
  boundary     : 4611686018427387904
Slave: Hardware PCM card 1 'tegra-snd-t186ref-mobile-rt565x' device 0 subdevice 0
Its setup is:
  stream       : CAPTURE
  access       : MMAP_INTERLEAVED
  format       : S8
  subformat    : STD
  channels     : 2
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 8
  buffer_size  : 16384
  period_size  : 4096
  period_time  : 85333
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 4096
  period_event : 0
  start_threshold  : 6
  stop_threshold   : 16384
  silence_threshold: 0
  silence_size : 0
  boundary     : 4611686018427387904
  appl_ptr     : 0
  hw_ptr       : 0

ShaneCCC · March 13, 2018, 2:49am

@Calmcar-Bao
Could you try the JetPack 3.2/r28.2 there have some fix for the i2s.

Calmcar-Bao · March 13, 2018, 6:59am

After the logic analyzer checks the MCLK of TX2 to give 12.5MHZ instead of 12.288HZ, what should I do?

ShaneCCC · March 13, 2018, 7:40am

How about the MCLK when use I2S1? Does it matter with this issue?

Calmcar-Bao · March 13, 2018, 7:47am

Yes, I use I2S1 for audio input, PCM1802 for audio decoder, I2S1 for clock frequency, PCM1802 for 12.28MHZ, and when I input arecord instruction, I see the MCLK clock output is 12.5MHZ? I doubt if there is any sound in the recording

ShaneCCC · March 16, 2018, 2:37am

Would you try the new release BSP 28.2?

Calmcar-Bao · March 16, 2018, 3:09am

Temporarily failed to upgrade 28.1,I switched to TX1, 28.1 now has a signal, but it is all noise。
arecord -c 1 -d 5 -r 48000 -f S16_LE test.wav

[url]腾讯微云
[url]腾讯微云
Attachments are pictures and sounds

jonathanh · March 16, 2018, 2:20pm

Hello!

With regard to commment #9, can you tell me …

What device is connected to the I2S port?
What I2S port are you using?
Are you using the Tegra AUD_MCLK to clock the external device?
Which device is the I2S bit and frame clock masters?
Is the data format normal I2S? If so is there only data on one channel because you are using ‘-c 1’?

Thanks
Jon

Calmcar-Bao · March 19, 2018, 3:46am

Input is PCM1802 to MIC
Yes, provide 12288000 frequency to PCM1802
PCM1802 is a slave device, TX2/TX1 is the master device
Is normal I2S ,-c 2
There is no signal on DIN now

Calmcar-Bao · March 19, 2018, 6:06am

The MIC I use is mono

jonathanh · March 19, 2018, 9:54am

If the I2S bit clock and frame clock are operating at the correct frequency but there is no data on DIN, then you need to check the PCM1802 configuration. Given that this is a TI device, you would need to verify with TI if it is configured correctly.

Regards,
Jon

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TX2 I2S pin and recording problems

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