Hello Nordic Team, I am working with the nRF9151 DK and exploring audio output using the TLV320DAC3100 DAC. I see that I2C is clearly available in the DK schematic , but I2S signals are not obvious or exposed , even though Zephyr provides I2S drivers for the nRF91 series . Could you please clarify: Whether I2S testing is officially supported on the nRF9151 DK ? If supported, how the I2S pins are expected to be accessed on the DK. If not, whether testing TLV320DAC3100 with nRF9151 is recommended , or if another DK is better suited. Thanks for your guidance. Best regards, Subhiksha

nRF9151 DK – I2S support and TLV320DAC3100 testing

Hello Nordic Team,

I am working with the nRF9151 DK and exploring audio output using the TLV320DAC3100 DAC.

I see that I2C is clearly available in the DK schematic, but I2S signals are not obvious or exposed, even though Zephyr provides I2S drivers for the nRF91 series.

Could you please clarify:

Whether I2S testing is officially supported on the nRF9151 DK?
If supported, how the I2S pins are expected to be accessed on the DK.
If not, whether testing TLV320DAC3100 with nRF9151 is recommended, or if another DK is better suited.

Thanks for your guidance.

Best regards,
Subhiksha

0 Subhiksha 12 days ago in reply to Simon D-M

Hi Simon,

Thanks a lot for taking the time to create and share the overlay example — really appreciate it.

Based on your suggestion, I’ve captured the full pristine build logs, along with the overlay snippet and relevant project details from my setup. Even though the overlay structure matches the expected pinctrl-based configuration, I am still running into build‑time devicetree errors (including NRF_PSEL() evaluation issues and pinctrl-related failures) in my setup.

I am sharing below:

The overlay file currently used in my project
The complete pristine build logs for reference

It would be very helpful if you could take a look and let me know if I’m missing any nRF9151‑specific requirement (for example, expected pinctrl include paths, differences in _ns build handling, or any prerequisite configuration when enabling I2S).

Thanks again for your support and for sharing a buildable reference. Looking forward to your guidance.

Best regards,

subhiksha

Fullscreen 6076.build_logs.txt Download

Executing task: nRF Connect: Build [incremental]: at_monitor/build/at_monitor 

Building at_monitor
west build --build-dir d:/vscode_workspace/at_monitor/build --domain at_monitor

-- west build: building domain(s): at_monitor
[1/19] Linking C static library zephyr\drivers\serial\libdrivers__serial.a
[2/19] Building C object CMakeFiles/app.dir/src/tlv320dac3100.c.obj
FAILED: CMakeFiles/app.dir/src/tlv320dac3100.c.obj 
C:\ncs\toolchains\fd21892d0f\opt\zephyr-sdk\arm-zephyr-eabi\bin\arm-zephyr-eabi-gcc.exe -DKERNEL -DK_HEAP_MEM_POOL_SIZE=8192 -DNRF54L_CONFIGURATION_56_ENABLE=0 -DNRF9120_XXAA -DNRF_SKIP_FICR_NS_COPY_TO_RAM -DPICOLIBC_DOUBLE_PRINTF_SCANF -DUSE_PARTITION_MANAGER=1 -D__LINUX_ERRNO_EXTENSIONS__ -D__PROGRAM_START -D__ZEPHYR__=1 -ID:/vscode_workspace/at_monitor/include -ID:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated/zephyr -IC:/ncs/v3.2.4/zephyr/include -ID:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated -IC:/ncs/v3.2.4/zephyr/soc/nordic -IC:/ncs/v3.2.4/zephyr/lib/posix/options/getopt -IC:/ncs/v3.2.4/zephyr/soc/nordic/nrf91/. -IC:/ncs/v3.2.4/zephyr/soc/nordic/common/. -IC:/ncs/v3.2.4/zephyr/subsys/shell/modules/kernel_service/thread/.. -IC:/ncs/v3.2.4/nrf/include -IC:/ncs/v3.2.4/nrf/tests/include -IC:/ncs/v3.2.4/modules/hal/cmsis_6/CMSIS/Core/Include -IC:/ncs/v3.2.4/zephyr/modules/cmsis_6/. -IC:/ncs/v3.2.4/nrf/modules/hal_nordic/. -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/include -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/bsp/stable -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/bsp/stable/templates -IC:/ncs/v3.2.4/zephyr/modules/hal_nordic/nrfx/. -isystem C:/ncs/v3.2.4/zephyr/lib/libc/common/include -isystem C:/ncs/v3.2.4/nrfxlib/crypto/nrf_cc310_platform/include -fno-strict-aliasing -Os -imacros D:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated/zephyr/autoconf.h -fno-common -g -gdwarf-4 -fdiagnostics-color=always -mcpu=cortex-m33 -mthumb -mabi=aapcs -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mfp16-format=ieee -mtp=soft --sysroot=C:/ncs/toolchains/fd21892d0f/opt/zephyr-sdk/arm-zephyr-eabi/arm-zephyr-eabi -imacros C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/zephyr_stdint.h -Wall -Wformat -Wformat-security -Wno-format-zero-length -Wdouble-promotion -Wno-pointer-sign -Wpointer-arith -Wexpansion-to-defined -Wno-unused-but-set-variable -Werror=implicit-int -fno-pic -fno-pie -fno-asynchronous-unwind-tables -ftls-model=local-exec -fno-reorder-functions --param=min-pagesize=0 -fno-defer-pop -fmacro-prefix-map=D:/vscode_workspace/at_monitor=CMAKE_SOURCE_DIR -fmacro-prefix-map=C:/ncs/v3.2.4/zephyr=ZEPHYR_BASE -fmacro-prefix-map=C:/ncs/v3.2.4=WEST_TOPDIR -ffunction-sections -fdata-sections -specs=picolibc.specs -D_POSIX_THREADS -std=c99 -MD -MT CMakeFiles/app.dir/src/tlv320dac3100.c.obj -MF CMakeFiles\app.dir\src\tlv320dac3100.c.obj.d -o CMakeFiles/app.dir/src/tlv320dac3100.c.obj -c D:/vscode_workspace/at_monitor/src/tlv320dac3100.c
D:/vscode_workspace/at_monitor/src/tlv320dac3100.c:20:10: fatal error: zephyr/include/zephyr/sys/clock.h: No such file or directory
   20 | #include <zephyr/include/zephyr/sys/clock.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[3/19] Linking C static library zephyr\drivers\timer\libdrivers__timer.a
[4/19] Linking C static library modules\nrf\drivers\hw_cc3xx\lib..__nrf__drivers__hw_cc3xx.a
[5/19] Building C object CMakeFiles/app.dir/src/main.c.obj
FAILED: CMakeFiles/app.dir/src/main.c.obj 
C:\ncs\toolchains\fd21892d0f\opt\zephyr-sdk\arm-zephyr-eabi\bin\arm-zephyr-eabi-gcc.exe -DKERNEL -DK_HEAP_MEM_POOL_SIZE=8192 -DNRF54L_CONFIGURATION_56_ENABLE=0 -DNRF9120_XXAA -DNRF_SKIP_FICR_NS_COPY_TO_RAM -DPICOLIBC_DOUBLE_PRINTF_SCANF -DUSE_PARTITION_MANAGER=1 -D__LINUX_ERRNO_EXTENSIONS__ -D__PROGRAM_START -D__ZEPHYR__=1 -ID:/vscode_workspace/at_monitor/include -ID:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated/zephyr -IC:/ncs/v3.2.4/zephyr/include -ID:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated -IC:/ncs/v3.2.4/zephyr/soc/nordic -IC:/ncs/v3.2.4/zephyr/lib/posix/options/getopt -IC:/ncs/v3.2.4/zephyr/soc/nordic/nrf91/. -IC:/ncs/v3.2.4/zephyr/soc/nordic/common/. -IC:/ncs/v3.2.4/zephyr/subsys/shell/modules/kernel_service/thread/.. -IC:/ncs/v3.2.4/nrf/include -IC:/ncs/v3.2.4/nrf/tests/include -IC:/ncs/v3.2.4/modules/hal/cmsis_6/CMSIS/Core/Include -IC:/ncs/v3.2.4/zephyr/modules/cmsis_6/. -IC:/ncs/v3.2.4/nrf/modules/hal_nordic/. -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/include -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/bsp/stable -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/bsp/stable/templates -IC:/ncs/v3.2.4/zephyr/modules/hal_nordic/nrfx/. -isystem C:/ncs/v3.2.4/zephyr/lib/libc/common/include -isystem C:/ncs/v3.2.4/nrfxlib/crypto/nrf_cc310_platform/include -fno-strict-aliasing -Os -imacros D:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated/zephyr/autoconf.h -fno-common -g -gdwarf-4 -fdiagnostics-color=always -mcpu=cortex-m33 -mthumb -mabi=aapcs -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mfp16-format=ieee -mtp=soft --sysroot=C:/ncs/toolchains/fd21892d0f/opt/zephyr-sdk/arm-zephyr-eabi/arm-zephyr-eabi -imacros C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/zephyr_stdint.h -Wall -Wformat -Wformat-security -Wno-format-zero-length -Wdouble-promotion -Wno-pointer-sign -Wpointer-arith -Wexpansion-to-defined -Wno-unused-but-set-variable -Werror=implicit-int -fno-pic -fno-pie -fno-asynchronous-unwind-tables -ftls-model=local-exec -fno-reorder-functions --param=min-pagesize=0 -fno-defer-pop -fmacro-prefix-map=D:/vscode_workspace/at_monitor=CMAKE_SOURCE_DIR -fmacro-prefix-map=C:/ncs/v3.2.4/zephyr=ZEPHYR_BASE -fmacro-prefix-map=C:/ncs/v3.2.4=WEST_TOPDIR -ffunction-sections -fdata-sections -specs=picolibc.specs -D_POSIX_THREADS -std=c99 -MD -MT CMakeFiles/app.dir/src/main.c.obj -MF CMakeFiles\app.dir\src\main.c.obj.d -o CMakeFiles/app.dir/src/main.c.obj -c D:/vscode_workspace/at_monitor/src/main.c
In file included from C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/gcc.h:98,
                 from C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain.h:52,
                 from C:/ncs/v3.2.4/zephyr/include/zephyr/kernel_includes.h:23,
                 from C:/ncs/v3.2.4/zephyr/include/zephyr/kernel.h:17,
                 from D:/vscode_workspace/at_monitor/src/main.c:18:
D:/vscode_workspace/at_monitor/src/main.c: In function 'audio_thread_fn':
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:41: error: '__device_dts_ord_78' undeclared (first use in this function); did you mean '__device_dts_ord_18'?
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                         ^~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/common.h:168:26: note: in definition of macro '_DO_CONCAT'
  168 | #define _DO_CONCAT(x, y) x ## y
      |                          ^
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:33: note: in expansion of macro '_CONCAT'
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                 ^~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:297:37: note: in expansion of macro 'DEVICE_NAME_GET'
  297 | #define DEVICE_DT_NAME_GET(node_id) DEVICE_NAME_GET(Z_DEVICE_DT_DEV_ID(node_id))
      |                                     ^~~~~~~~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:314:34: note: in expansion of macro 'DEVICE_DT_NAME_GET'
  314 | #define DEVICE_DT_GET(node_id) (&DEVICE_DT_NAME_GET(node_id))
      |                                  ^~~~~~~~~~~~~~~~~~
D:/vscode_workspace/at_monitor/src/main.c:154:36: note: in expansion of macro 'DEVICE_DT_GET'
  154 |     const struct device *i2s_dev = DEVICE_DT_GET(I2S_NODE);
      |                                    ^~~~~~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:41: note: each undeclared identifier is reported only once for each function it appears in
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                         ^~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/common.h:168:26: note: in definition of macro '_DO_CONCAT'
  168 | #define _DO_CONCAT(x, y) x ## y
      |                          ^
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:33: note: in expansion of macro '_CONCAT'
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                 ^~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:297:37: note: in expansion of macro 'DEVICE_NAME_GET'
  297 | #define DEVICE_DT_NAME_GET(node_id) DEVICE_NAME_GET(Z_DEVICE_DT_DEV_ID(node_id))
      |                                     ^~~~~~~~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:314:34: note: in expansion of macro 'DEVICE_DT_NAME_GET'
  314 | #define DEVICE_DT_GET(node_id) (&DEVICE_DT_NAME_GET(node_id))
      |                                  ^~~~~~~~~~~~~~~~~~
D:/vscode_workspace/at_monitor/src/main.c:154:36: note: in expansion of macro 'DEVICE_DT_GET'
  154 |     const struct device *i2s_dev = DEVICE_DT_GET(I2S_NODE);
      |                                    ^~~~~~~~~~~~~
In file included from D:/vscode_workspace/at_monitor/src/main.c:25:
D:/vscode_workspace/at_monitor/src/main.c: In function 'cmd_vol':
D:/vscode_workspace/at_monitor/src/main.c:287:41: warning: implicit conversion from 'float' to 'double' when passing argument to function [-Wdouble-promotion]
  287 |                 _vol_db, (float)_vol_db * 0.5f);
      |                          ~~~~~~~~~~~~~~~^~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/shell/shell.h:1267:47: note: in definition of macro 'shell_print'
 1267 |         shell_fprintf_normal(_sh, _ft "\n", ##__VA_ARGS__)
      |                                               ^~~~~~~~~~~
[6/19] Building C object modules/hal_nordic/modules/hal_nordic/nrfx/CMakeFiles/modules__hal_nordic__nrfx.dir/C_/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/src/nrfx_clock_hfclkaudio.c.obj
[7/19] Building C object modules/hal_nordic/modules/hal_nordic/nrfx/CMakeFiles/modules__hal_nordic__nrfx.dir/C_/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/src/nrfx_clock_xo.c.obj
[8/19] Building C object modules/hal_nordic/modules/hal_nordic/nrfx/CMakeFiles/modules__hal_nordic__nrfx.dir/C_/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/src/nrfx_clock_hfclk.c.obj
[9/19] Building C object modules/hal_nordic/modules/hal_nordic/nrfx/CMakeFiles/modules__hal_nordic__nrfx.dir/C_/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/src/nrfx_twi_twim.c.obj
[10/19] Building C object modules/hal_nordic/modules/hal_nordic/nrfx/CMakeFiles/modules__hal_nordic__nrfx.dir/C_/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/src/nrfx_twim.c.obj
[11/19] Building C object modules/hal_nordic/modules/hal_nordic/nrfx/CMakeFiles/modules__hal_nordic__nrfx.dir/C_/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/src/nrfx_gpiote.c.obj
ninja: build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: 'C:\ncs\toolchains\fd21892d0f\opt\bin\cmake.EXE' --build D:/vscode_workspace/at_monitor/build/at_monitor

 *  The terminal process terminated with exit code: 1. 
 *  Terminal will be reused by tasks, press any key to close it.

0 Simon D-M 12 days ago in reply to Subhiksha

Hi,

There are 2 errors from what I can see from the logs:

FAILED: CMakeFiles/app.dir/src/tlv320dac3100.c.obj 
C:\ncs\toolchains\fd21892d0f\opt\zephyr-sdk\arm-zephyr-eabi\bin\arm-zephyr-eabi-gcc.exe -DKERNEL -DK_HEAP_MEM_POOL_SIZE=8192 -DNRF54L_CONFIGURATION_56_ENABLE=0 -DNRF9120_XXAA -DNRF_SKIP_FICR_NS_COPY_TO_RAM -DPICOLIBC_DOUBLE_PRINTF_SCANF -DUSE_PARTITION_MANAGER=1 -D__LINUX_ERRNO_EXTENSIONS__ -D__PROGRAM_START -D__ZEPHYR__=1 -ID:/vscode_workspace/at_monitor/include -ID:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated/zephyr -IC:/ncs/v3.2.4/zephyr/include -ID:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated -IC:/ncs/v3.2.4/zephyr/soc/nordic -IC:/ncs/v3.2.4/zephyr/lib/posix/options/getopt -IC:/ncs/v3.2.4/zephyr/soc/nordic/nrf91/. -IC:/ncs/v3.2.4/zephyr/soc/nordic/common/. -IC:/ncs/v3.2.4/zephyr/subsys/shell/modules/kernel_service/thread/.. -IC:/ncs/v3.2.4/nrf/include -IC:/ncs/v3.2.4/nrf/tests/include -IC:/ncs/v3.2.4/modules/hal/cmsis_6/CMSIS/Core/Include -IC:/ncs/v3.2.4/zephyr/modules/cmsis_6/. -IC:/ncs/v3.2.4/nrf/modules/hal_nordic/. -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/drivers/include -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/bsp/stable -IC:/ncs/v3.2.4/modules/hal/nordic/nrfx/bsp/stable/templates -IC:/ncs/v3.2.4/zephyr/modules/hal_nordic/nrfx/. -isystem C:/ncs/v3.2.4/zephyr/lib/libc/common/include -isystem C:/ncs/v3.2.4/nrfxlib/crypto/nrf_cc310_platform/include -fno-strict-aliasing -Os -imacros D:/vscode_workspace/at_monitor/build/at_monitor/zephyr/include/generated/zephyr/autoconf.h -fno-common -g -gdwarf-4 -fdiagnostics-color=always -mcpu=cortex-m33 -mthumb -mabi=aapcs -mfpu=fpv5-sp-d16 -mfloat-abi=hard -mfp16-format=ieee -mtp=soft --sysroot=C:/ncs/toolchains/fd21892d0f/opt/zephyr-sdk/arm-zephyr-eabi/arm-zephyr-eabi -imacros C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/zephyr_stdint.h -Wall -Wformat -Wformat-security -Wno-format-zero-length -Wdouble-promotion -Wno-pointer-sign -Wpointer-arith -Wexpansion-to-defined -Wno-unused-but-set-variable -Werror=implicit-int -fno-pic -fno-pie -fno-asynchronous-unwind-tables -ftls-model=local-exec -fno-reorder-functions --param=min-pagesize=0 -fno-defer-pop -fmacro-prefix-map=D:/vscode_workspace/at_monitor=CMAKE_SOURCE_DIR -fmacro-prefix-map=C:/ncs/v3.2.4/zephyr=ZEPHYR_BASE -fmacro-prefix-map=C:/ncs/v3.2.4=WEST_TOPDIR -ffunction-sections -fdata-sections -specs=picolibc.specs -D_POSIX_THREADS -std=c99 -MD -MT CMakeFiles/app.dir/src/tlv320dac3100.c.obj -MF CMakeFiles\app.dir\src\tlv320dac3100.c.obj.d -o CMakeFiles/app.dir/src/tlv320dac3100.c.obj -c D:/vscode_workspace/at_monitor/src/tlv320dac3100.c
D:/vscode_workspace/at_monitor/src/tlv320dac3100.c:20:10: fatal error: zephyr/include/zephyr/sys/clock.h: No such file or directory
   20 | #include <zephyr/include/zephyr/sys/clock.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Your "#include" path is wrong. You don't have to put "zephyr/include/..." you should directly include <zephyr/sys/clock.h>.

D:/vscode_workspace/at_monitor/src/main.c: In function 'audio_thread_fn':
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:41: error: '__device_dts_ord_78' undeclared (first use in this function); did you mean '__device_dts_ord_18'?
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                         ^~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/common.h:168:26: note: in definition of macro '_DO_CONCAT'
  168 | #define _DO_CONCAT(x, y) x ## y
      |                          ^
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:33: note: in expansion of macro '_CONCAT'
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                 ^~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:297:37: note: in expansion of macro 'DEVICE_NAME_GET'
  297 | #define DEVICE_DT_NAME_GET(node_id) DEVICE_NAME_GET(Z_DEVICE_DT_DEV_ID(node_id))
      |                                     ^~~~~~~~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:314:34: note: in expansion of macro 'DEVICE_DT_NAME_GET'
  314 | #define DEVICE_DT_GET(node_id) (&DEVICE_DT_NAME_GET(node_id))
      |                                  ^~~~~~~~~~~~~~~~~~
D:/vscode_workspace/at_monitor/src/main.c:154:36: note: in expansion of macro 'DEVICE_DT_GET'
  154 |     const struct device *i2s_dev = DEVICE_DT_GET(I2S_NODE);
      |                                    ^~~~~~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:41: note: each undeclared identifier is reported only once for each function it appears in
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                         ^~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/toolchain/common.h:168:26: note: in definition of macro '_DO_CONCAT'
  168 | #define _DO_CONCAT(x, y) x ## y
      |                          ^
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:96:33: note: in expansion of macro '_CONCAT'
   96 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id)
      |                                 ^~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:297:37: note: in expansion of macro 'DEVICE_NAME_GET'
  297 | #define DEVICE_DT_NAME_GET(node_id) DEVICE_NAME_GET(Z_DEVICE_DT_DEV_ID(node_id))
      |                                     ^~~~~~~~~~~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/device.h:314:34: note: in expansion of macro 'DEVICE_DT_NAME_GET'
  314 | #define DEVICE_DT_GET(node_id) (&DEVICE_DT_NAME_GET(node_id))
      |                                  ^~~~~~~~~~~~~~~~~~
D:/vscode_workspace/at_monitor/src/main.c:154:36: note: in expansion of macro 'DEVICE_DT_GET'
  154 |     const struct device *i2s_dev = DEVICE_DT_GET(I2S_NODE);
      |                                    ^~~~~~~~~~~~~
In file included from D:/vscode_workspace/at_monitor/src/main.c:25:
D:/vscode_workspace/at_monitor/src/main.c: In function 'cmd_vol':
D:/vscode_workspace/at_monitor/src/main.c:287:41: warning: implicit conversion from 'float' to 'double' when passing argument to function [-Wdouble-promotion]
  287 |                 _vol_db, (float)_vol_db * 0.5f);
      |                          ~~~~~~~~~~~~~~~^~~~~~
C:/ncs/v3.2.4/zephyr/include/zephyr/shell/shell.h:1267:47: note: in definition of macro 'shell_print'
 1267 |         shell_fprintf_normal(_sh, _ft "\n", ##__VA_ARGS__)
      |                                               ^~~~~~~~~~~

In your code, you have "const struct device *i2s_dev = DEVICE_DT_GET(I2S_NODE);". But it seems like either you didn't define I2S_NODE, or that it point to the wrong DTS node. You need to modify the alias in the overlay file to suit your need, and if I2S_NODE is not defied, please define it with the corresponding alias.

It looks to me that you are not very familiar with Zephyr and devicetree, I would recommend you taking the nRF Connect SDK Fundamental course on DevAcademy. It will help you understand how Zephyr actually works and how you can use devicetree correctly and so on.

Best regards,

Simon D-M