if (TARGET _imxrt_family_inclusion_marker)
  return()
endif ()

add_library(_imxrt_family_inclusion_marker INTERFACE)

if (NOT BOARD)
  message(FATAL_ERROR "BOARD not specified")
endif ()

# TOP is path to root directory
set(TOP "${CMAKE_CURRENT_LIST_DIR}/../../..")

# toolchain set up
set(CMAKE_SYSTEM_PROCESSOR cortex-m7 CACHE INTERNAL "System Processor")
set(CMAKE_TOOLCHAIN_FILE ${TOP}/tools/cmake/toolchain/arm_${TOOLCHAIN}.cmake)

set(FAMILY_MCUS MIMXRT CACHE INTERNAL "")

# include board specific
include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)


#------------------------------------
# BOARD_TARGET
#------------------------------------
# only need to be built ONCE for all examples
set(BOARD_TARGET board_${BOARD})
if (NOT TARGET ${BOARD_TARGET})
  set(SDK_DIR ${TOP}/hw/mcu/nxp/mcux-sdk)
  set(CMSIS_DIR ${TOP}/lib/CMSIS_5)

  add_library(${BOARD_TARGET} STATIC
    ${SDK_DIR}/drivers/common/fsl_common.c
    ${SDK_DIR}/drivers/igpio/fsl_gpio.c
    ${SDK_DIR}/drivers/lpuart/fsl_lpuart.c
    ${SDK_DIR}/devices/${MCU_VARIANT}/system_${MCU_VARIANT}.c
    ${SDK_DIR}/devices/${MCU_VARIANT}/xip/fsl_flexspi_nor_boot.c
    ${SDK_DIR}/devices/${MCU_VARIANT}/project_template/clock_config.c
    ${SDK_DIR}/devices/${MCU_VARIANT}/drivers/fsl_clock.c
    )
  target_compile_definitions(${BOARD_TARGET} PUBLIC
    CFG_TUSB_MCU=OPT_MCU_MIMXRT
    __ARMVFP__=0
    __ARMFPV5__=0
    XIP_EXTERNAL_FLASH=1
    XIP_BOOT_HEADER_ENABLE=1
    )
  target_include_directories(${BOARD_TARGET} PUBLIC
    ${CMSIS_DIR}/CMSIS/Core/Include
    ${SDK_DIR}/devices/${MCU_VARIANT}
    ${SDK_DIR}/devices/${MCU_VARIANT}/project_template
    ${SDK_DIR}/devices/${MCU_VARIANT}/drivers
    ${SDK_DIR}/drivers/common
    ${SDK_DIR}/drivers/igpio
    ${SDK_DIR}/drivers/lpuart
    )
  update_board(${BOARD_TARGET})

  if (NOT DEFINED LD_FILE_${TOOLCHAIN})
    set(LD_FILE_gcc ${SDK_DIR}/devices/${MCU_VARIANT}/gcc/${MCU_VARIANT}xxxxx_flexspi_nor.ld)
  endif ()

  if (TOOLCHAIN STREQUAL "gcc")
    target_sources(${BOARD_TARGET} PUBLIC
      ${SDK_DIR}/devices/${MCU_VARIANT}/gcc/startup_${MCU_VARIANT}.S
      )
    target_link_options(${BOARD_TARGET} PUBLIC
      "LINKER:--script=${LD_FILE_gcc}"
      "LINKER:-Map=$<IF:$<BOOL:$<TARGET_PROPERTY:OUTPUT_NAME>>,$<TARGET_PROPERTY:OUTPUT_NAME>,$<TARGET_PROPERTY:NAME>>${CMAKE_EXECUTABLE_SUFFIX}.map"
      # nanolib
      --specs=nosys.specs
      --specs=nano.specs
      # force linker to look for these symbols
      -Wl,-uimage_vector_table
      -Wl,-ug_boot_data
      )
  else ()
    # TODO support IAR
  endif ()
endif () # BOARD_TARGET

#------------------------------------
# Functions
#------------------------------------
function(family_configure_target TARGET)
  # set output name to .elf
  set_target_properties(${TARGET} PROPERTIES OUTPUT_NAME ${TARGET}.elf)

  # TOP is path to root directory
  set(TOP "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../../..")

  #---------- Port Specific ----------
  # These files are built for each example since it depends on example's tusb_config.h
  target_sources(${TARGET} PUBLIC
    # TinyUSB Port
    ${TOP}/src/portable/chipidea/ci_hs/dcd_ci_hs.c
    ${TOP}/src/portable/chipidea/ci_hs/hcd_ci_hs.c
    ${TOP}/src/portable/ehci/ehci.c
    # BSP
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/family.c
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../board.c
    )
  target_include_directories(${TARGET} PUBLIC
    # family, hw, board
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../../
    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/boards/${BOARD}
    )

  #---------- TinyUSB ----------
  # tinyusb target is built for each example since it depends on example's tusb_config.h
  set(TINYUSB_TARGET_PREFIX ${TARGET}-)
  add_library(${TARGET}-tinyusb_config INTERFACE)

  target_include_directories(${TARGET}-tinyusb_config INTERFACE
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    )
  target_compile_definitions(${TARGET}-tinyusb_config INTERFACE
    CFG_TUSB_MCU=OPT_MCU_MIMXRT
    )

  # tinyusb's CMakeList.txt
  add_subdirectory(${TOP}/src ${CMAKE_CURRENT_BINARY_DIR}/tinyusb)

  # Link dependencies
  target_link_libraries(${TARGET} PUBLIC ${BOARD_TARGET} ${TARGET}-tinyusb)

  # group target (not yet supported by clion)
  set_target_properties(${TARGET}-tinyusb ${TARGET}-tinyusb_config
    PROPERTIES FOLDER ${TARGET}_sub
    )

  #---------- Flash ----------
  # Flash using pyocd
  add_custom_target(${TARGET}-pyocd
    DEPENDS ${TARGET}
    COMMAND pyocd flash -t ${PYOCD_TARGET} $<TARGET_FILE:${TARGET}>
    )

  # Flash using NXP LinkServer (redlink)
  # https://www.nxp.com/design/software/development-software/mcuxpresso-software-and-tools-/linkserver-for-microcontrollers:LINKERSERVER
  # LinkServer has a bug that can only execute with full path otherwise it throws:
  # realpath error: No such file or directory
  execute_process(COMMAND which LinkServer OUTPUT_VARIABLE LINKSERVER_PATH OUTPUT_STRIP_TRAILING_WHITESPACE)
  add_custom_target(${TARGET}-nxplink
    DEPENDS ${TARGET}
    COMMAND ${LINKSERVER_PATH} flash ${NXPLINK_DEVICE} load $<TARGET_FILE:${TARGET}>
    )

  # Flash using jlink
  set(JLINKEXE JLinkExe)
  file(GENERATE
    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.jlink
    CONTENT "halt
loadfile $<TARGET_FILE:${TARGET}>
r
go
exit"
    )
  add_custom_target(${TARGET}-jlink
    DEPENDS ${TARGET}
    COMMAND ${JLINKEXE} -device ${JLINK_DEVICE} -if swd -JTAGConf -1,-1 -speed auto -CommandFile ${CMAKE_CURRENT_BINARY_DIR}/${TARGET}.jlink
    )

endfunction()


function(family_add_freertos TARGET)
  # freertos_config
  add_subdirectory(${CMAKE_CURRENT_FUNCTION_LIST_DIR}/FreeRTOSConfig ${CMAKE_CURRENT_BINARY_DIR}/freertos_config)

  ## freertos
  if (NOT TARGET freertos_kernel)
    add_subdirectory(${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../../../lib/FreeRTOS-Kernel ${CMAKE_CURRENT_BINARY_DIR}/freertos_kernel)
  endif ()

  # Add FreeRTOS option to tinyusb_config
  target_compile_definitions(${TARGET}-tinyusb_config INTERFACE
    CFG_TUSB_OS=OPT_OS_FREERTOS
    )
  # link tinyusb with freeRTOS kernel
  target_link_libraries(${TARGET}-tinyusb PUBLIC
    freertos_kernel
    )
  target_link_libraries(${TARGET} PUBLIC
    freertos_kernel
    )
endfunction()

function(family_configure_device_example TARGET)
  family_configure_target(${TARGET})
endfunction()

function(family_configure_host_example TARGET)
  family_configure_target(${TARGET})
endfunction()

function(family_configure_dual_usb_example TARGET)
  family_configure_target(${TARGET})
endfunction()