build: uf2: set offset when building RAM images

if(CONFIG_BUILD_OUTPUT_BIN AND CONFIG_BUILD_OUTPUT_UF2)

  if(CONFIG_BUILD_OUTPUT_UF2_USE_FLASH_BASE)

    set(flash_addr "${CONFIG_FLASH_BASE_ADDRESS}")

    set(code_address "${CONFIG_FLASH_BASE_ADDRESS}")

  else()

    set(flash_addr "${CONFIG_FLASH_LOAD_OFFSET}")

    set(code_address "${CONFIG_FLASH_LOAD_OFFSET}")

  endif()

  if(CONFIG_BUILD_OUTPUT_UF2_USE_FLASH_OFFSET)

    # Note, the `+ 0` in formula below avoids errors in cases where a Kconfig

    #       variable is undefined and thus expands to nothing.

    math(EXPR flash_addr

        "${flash_addr} + ${CONFIG_FLASH_LOAD_OFFSET} + 0"

    math(EXPR code_address

        "${code_address} + ${CONFIG_FLASH_LOAD_OFFSET} + 0"

         OUTPUT_FORMAT HEXADECIMAL

    )

  endif()

  # No-XIP images (such as ones for RP2350 with CONFIG_XIP=n)

  # are typically loaded to RAM

  if(NOT CONFIG_XIP)

    if(CONFIG_BUILD_OUTPUT_ADJUST_LMA)

      math(EXPR code_address

          "${CONFIG_SRAM_BASE_ADDRESS} + ${CONFIG_BUILD_OUTPUT_ADJUST_LMA} + 0"

          OUTPUT_FORMAT HEXADECIMAL

      )

    else()

      set(code_address "${CONFIG_SRAM_BASE_ADDRESS}")

    endif()

  endif()

  list(APPEND

    post_build_commands

    COMMAND ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/build/uf2conv.py

            -c

            -f ${CONFIG_BUILD_OUTPUT_UF2_FAMILY_ID}

            -b ${flash_addr}

            -b ${code_address}

            -o ${KERNEL_UF2_NAME}

            ${KERNEL_BIN_NAME}

  )