I2S not working on Jetson Nano Devkit

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hi, I’m trying to setup i2s4 on a Jetson Nano Devkit (p3448 + p3449 b00) in order to control a HiLetgo PCM5102 module.

  1. I have enabled i2s4 using jetson-io.py.

  2. And then connected i2s4 to ADMAIF1 using amixer -c tegrasndt210ref cset name='I2S4 Mux' ADMAIF1.

  3. I set up a logic analyzer probes on pin 12, 35 and 39.

But when I launch speaker-test -D hw:tegrasndt210ref,0 -r 48000 -c 2 -F S16_LE -t sine, I see no signal on my logic analyzer…

What have I missed ? Thanks in advance !

4

Hi ! Bumping this subject !

5

Hi Valentin,
Can you attach the log after running speaker-test.

Refer the below right probe point pins for I2S mapping on 40 pin header

I2S4_FS 35
I2S4_SCLK 12
I2S4_SDIN 38
I2S4_SDOUT 40

Cross check the pinmux of I2S4 on target. I assume none of the I2S signal are coming out?. If so it could be pinmux issue, provide the below dump log

sudo grep dap4 /sys/kernel/debug/tegra_pinctrl_reg