---

bcl:app - unknow argument

добавил:
zephyr_code_relocate(FILES ${RESAMPLE_SRC_DIR}/resamplesubs.c LOCATION ITCM_TEXT)
zephyr_code_relocate(FILES src/main.c LOCATION ITCM_TEXT)

но всё равно ITCM пустой:
ng: orphan section `datas' from `app/libapp.a(resamplesubs.c.obj)' being placed in section `datas'
[178/178] Linking C executable zephyr/zephyr.elf
/home/vovan/ZEPHYR_RTOS/zephyrsdk/zephyr-sdk-0.16.3/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: orphan section `datas' from `app/libapp.a(resamplesubs.c.obj)' being placed in section `datas'
Memory region         Used Size  Region Size  %age Used
           FLASH:      114644 B         4 MB      2.73%
             RAM:     1095488 B        32 MB      3.26%
            ITCM:          0 GB       128 KB      0.00%
            DTCM:          0 GB        64 KB      0.00%
           OCRAM:          0 GB        64 KB      0.00%
        IDT_LIST:          0 GB        32 KB      0.00%