# "THE ANY BEVERAGE-WARE LICENSE" (Revision 42 - based on beer-ware
# license):
# <dev@layer128.net> wrote this file. As long as you retain this notice
# you can do whatever you want with this stuff. If we meet some day, and
# you think this stuff is worth it, you can buy me a be(ve)er(age) in
# return. (I don't like beer much.)
#
# Matthias Kleemann

# tools to beused for programming the AVR
set(AVR_UPLOADTOOL avrdude)
set(AVR_PROGRAMMER arduino)
set(AVR_UPLOADTOOL_PORT /dev/ttyUSB0)
set(AVR_UPLOADTOOL_OPTIONS -b57600)

# AVR and fuses needs to be set
set(AVR_MCU atmega328p)
set(AVR_H_FUSE 0xd9)
set(AVR_L_FUSE 0x62)
set(AVR_E_FUSE 0xff)

# needs to be defined for AVR toolchain
set(MCU_SPEED "16000000UL")

include("${CMAKE_MODULE_PATH}/generic-gcc-avr.cmake")

# status messages
message(STATUS "Current uploadtool is: ${AVR_UPLOADTOOL}")
message(STATUS "Current programmer is: ${AVR_PROGRAMMER}")
message(STATUS "Current upload port is: ${AVR_UPLOADTOOL_PORT}")
message(STATUS "Current uploadtool options are: ${AVR_UPLOADTOOL_OPTIONS}")
message(STATUS "Current MCU is set to: ${AVR_MCU}")
message(STATUS "Current MCU_SPEED is set to: ${MCU_SPEED}")
message(STATUS "Current H_FUSE is set to: ${AVR_H_FUSE}")
message(STATUS "Current L_FUSE is set to: ${AVR_L_FUSE}")
message(STATUS "Current E_FUSE is set to: ${AVR_E_FUSE}")

# set build type
if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE Release)
endif(NOT CMAKE_BUILD_TYPE)

# some cmake cross-compile necessities
if(DEFINED ENV{AVR_FIND_ROOT_PATH})
    set(CMAKE_FIND_ROOT_PATH $ENV{AVR_FIND_ROOT_PATH})
else(DEFINED ENV{AVR_FIND_ROOT_PATH})
    if(EXISTS "/opt/local/avr")
      set(CMAKE_FIND_ROOT_PATH "/opt/local/avr")
    elseif(EXISTS "/usr/avr")
      set(CMAKE_FIND_ROOT_PATH "/usr/avr")
    elseif(EXISTS "/usr/lib/avr")
      set(CMAKE_FIND_ROOT_PATH "/usr/lib/avr")
    else(EXISTS "/opt/local/avr")
      message(FATAL_ERROR "Please set AVR_FIND_ROOT_PATH in your environment.")
    endif(EXISTS "/opt/local/avr")
endif(DEFINED ENV{AVR_FIND_ROOT_PATH})
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
# not added automatically, since CMAKE_SYSTEM_NAME is "generic"
set(CMAKE_SYSTEM_INCLUDE_PATH "${CMAKE_FIND_ROOT_PATH}/include")
set(CMAKE_SYSTEM_LIBRARY_PATH "${CMAKE_FIND_ROOT_PATH}/lib")

# status messages for generating
message(STATUS "Set CMAKE_FIND_ROOT_PATH to ${CMAKE_FIND_ROOT_PATH}")
message(STATUS "Set CMAKE_SYSTEM_INCLUDE_PATH to ${CMAKE_SYSTEM_INCLUDE_PATH}")
message(STATUS "Set CMAKE_SYSTEM_LIBRARY_PATH to ${CMAKE_SYSTEM_LIBRARY_PATH}")

# set compiler options for build types
if(CMAKE_BUILD_TYPE MATCHES Release)
   set(CMAKE_C_FLAGS_RELEASE "-Os")
   set(CMAKE_CXX_FLAGS_RELEASE "-Os")
endif(CMAKE_BUILD_TYPE MATCHES Release)

if(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)
   set(CMAKE_C_FLAGS_RELWITHDEBINFO "-Os -save-temps -g -gdwarf-3 -gstrict-dwarf")
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-Os -save-temps -g -gdwarf-3 -gstrict-dwarf")
endif(CMAKE_BUILD_TYPE MATCHES RelWithDebInfo)

if(CMAKE_BUILD_TYPE MATCHES Debug)
   set(CMAKE_C_FLAGS_DEBUG "-O0 -save-temps -g -gdwarf-3 -gstrict-dwarf")
   set(CMAKE_CXX_FLAGS_DEBUG "-O0 -save-temps -g -gdwarf-3 -gstrict-dwarf")
endif(CMAKE_BUILD_TYPE MATCHES Debug)

# compiler options for all build types
add_definitions("-DBUILD_AVR")
add_definitions("-DF_CPU=${MCU_SPEED}")
add_definitions("-fpack-struct")
add_definitions("-fshort-enums")
add_definitions("-Wall")
add_definitions("-Werror")
add_definitions("-Wno-shift-count-overflow")
add_definitions("-pedantic")
add_definitions("-pedantic-errors")
add_definitions("-funsigned-char")
add_definitions("-funsigned-bitfields")
add_definitions("-ffunction-sections")
add_definitions("-c")
add_definitions("-std=gnu99")
add_definitions("-Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000")

