# use directory name for project id
option(USE_USBCDC_FOR_STDIO "Export an extra USB-CDC interface for stdio, instead of echoing it to a UART port (and requiring UART loopback for receiving stdio output on a host computer)." OFF)
set(FAMILY "rp2040" CACHE STRING "Board/MCU family, decides which drivers to use. Set to RP2040 by default.")
set(BOARD "raspberry_pi_pico" CACHE STRING "Board used, determines the pinout. Defaults to the Raspberry Pi Pico.")

set(PROJECT "picoftdi")
#set(PROJECT ${BOARD}-${PROJECT})

# TOP is absolute path to root directory of TinyUSB git repo

# Check for -DFAMILY=
if(FAMILY STREQUAL "rp2040")
  option(PICO_NO_FLASH "Disable writing the compiled program to flash, and only load it to RAM. Useful for testing, but not much else (OFF by default)." ON)
  option(PICO_COPY_TO_RAM "Run all code in RAM, while the program is also stored on flash. On bootup, everything will be copied to RAM (OFF by default)." OFF)

  cmake_minimum_required(VERSION 3.12)
  set(TOP "$ENV{PICO_SDK_PATH}/lib/tinyusb")
  get_filename_component(TOP "${TOP}" REALPATH)
  include(cmake/pico_sdk_import.cmake)

  include(${TOP}/hw/bsp/${FAMILY}/family.cmake)

  #family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
  project(${PROJECT})
  family_initialize_project(PROJECT ${CMAKE_CURRENT_LIST_DIR}) # calls pico_sdk_init()
  #pico_sdk_init()

  add_executable(${PROJECT})

  if(USE_USBCDC_FOR_STDIO)
    # we're going to manually implement this case
    #pico_enable_stdio_uart(${PROJECT} 0)
    target_compile_definitions(${PROJECT} PUBLIC USE_USBCDC_FOR_STDIO=1)
  else()
    #pico_enable_stdio_uart(${PROJECT} 1)
  endif()

  # TODO: separate flag for disabling this one?
  pico_enable_stdio_uart(${PROJECT} 1)
  pico_enable_stdio_usb(${PROJECT} 0)
  # Example source
  target_sources(${PROJECT} PUBLIC
    ${CMAKE_CURRENT_SOURCE_DIR}/libco/libco.S
    ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
    ${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
    ${CMAKE_CURRENT_SOURCE_DIR}/src/thread.c
    ${CMAKE_CURRENT_SOURCE_DIR}/src/ftdi.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/cdc_stdio.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/unique.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/asyncbb.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/cpufifo.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/fifo.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/ftdi_hw.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/ftdi_proto.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/mcuhost.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/mpsse.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/syncbb.c
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/uart.c
  )

 # Example include
  target_include_directories(${PROJECT} PUBLIC
    ${CMAKE_CURRENT_SOURCE_DIR}/libco/
    ${CMAKE_CURRENT_SOURCE_DIR}/src/
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/
    ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/
  )

  # Example defines
  target_compile_definitions(${PROJECT} PUBLIC
  )

  target_link_libraries(${PROJECT} pico_stdlib pico_unique_id hardware_spi
    hardware_i2c hardware_adc hardware_pio hardware_dma hardware_pwm
    pico_fix_rp2040_usb_device_enumeration
    tinyusb_device tinyusb_board tinyusb_additions)

  if(USE_USBCDC_FOR_STDIO)
    target_include_directories(${PROJECT} PUBLIC
      ${PICO_SDK_PATH}/src/rp2_common/pico_stdio_usb/include/
    )

    # extremely ugly hack to prevent the Pico SDK to declare *its* TinyUSB config
    # and also to modify the tinyusb board.h file a bit
    target_compile_definitions(${PROJECT} PUBLIC
      _PICO_STDIO_USB_TUSB_CONFIG_H=1
      BOARD_H_=1
    )

    target_link_libraries(${PROJECT} pico_stdio)
  endif()

  pico_generate_pio_header(${PROJECT} ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/ftdi_uart_rx.pio)
  pico_generate_pio_header(${PROJECT} ${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/ftdi/ftdi_uart_tx.pio)

  pico_add_extra_outputs(${PROJECT})
else()
  message(FATAL_ERROR "Invalid FAMILY specified")
endif()

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Werror=implicit-function-declaration -Werror=return-type -Werror=maybe-uninitialized")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--cref")