cmake: add FTDI FT4222 support

Existing FTDI D2xx support is just for serial comms library
but FT4222 needs a different library for i2c operation.

Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

CMakeLists.txt

@@ -56,6 +56,7 @@ option (BUILDSWIGNODE "Build swig node modules." ON)
 option (BUILDSWIGJAVA "Build Java API." OFF)
 option (USBPLAT "Detection USB platform." ON)
 option (FTDID2XX "Build with FTDI D2xx subplatform support." OFF)
+option (FTDI4222 "Build with FTDI FT4222 subplatform support." OFF)
 option (IPK "Generate IPK using CPack" OFF)
 option (RPM "Generate RPM using CPack" OFF)
 option (BUILDPYTHON3 "Use python3 for building/installing" OFF)

cmake/modules/FindFtd4222.cmake

@@ -0,0 +1,75 @@
+# - Try to find LIBFT4222
+# Once done this will define
+#
+#  LIBFT4222_FOUND - system has LIBFT4222
+#  LIBFT4222_INCLUDE_DIRS - the LIBFT4222 include directory
+#  LIBFT4222_LIBRARIES - Link these to use LIBFT4222
+#  LIBFT4222_DEFINITIONS - Compiler switches required for using LIBFT4222
+#
+#  Adapted from cmake-modules Google Code project
+#
+#  Copyright (c) 2006 Andreas Schneider <mail@cynapses.org>
+#
+#  (Changes for LIBFTD2XX) Copyright (c) 2008 Kyle Machulis <kyle@nonpolynomial.com>
+#  (Changes for LIBFT4222) Henry Bruce <henry.bruce@intel.com> Copyright (c) 2015 Intel Corporation. 
+#
+# Redistribution and use is allowed according to the terms of the New BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+if (LIBFT4222_LIBRARIES AND LIBFT4222_INCLUDE_DIRS)
+  # in cache already
+  set(LIBFT4222_FOUND TRUE)
+else (LIBFT4222_LIBRARIES AND LIBFT4222_INCLUDE_DIRS)
+  find_path(LIBFT4222_INCLUDE_DIR
+    NAMES
+    libft4222.h
+    PATHS
+    /usr/include
+    /usr/local/include
+    /opt/local/include
+    /sw/include
+	)
+
+  SET(FTD4222_LIBNAME ft4222)
+  IF(WIN32)
+	SET(FTD4222_LIBNAME LibFT4222.lib)
+  ENDIF(WIN32)
+
+  find_library(LIBFT4222_LIBRARY
+    NAMES
+    ${FTD4222_LIBNAME}
+    PATHS
+    /usr/lib
+    /usr/local/lib
+    /opt/local/lib
+    /sw/lib
+	)
+
+  if(LIBFT4222_INCLUDE_DIR)
+	set(LIBFT4222_INCLUDE_DIRS
+      ${LIBFT4222_INCLUDE_DIR}
+	  )
+  endif(LIBFT4222_INCLUDE_DIR)
+  set(LIBFT4222_LIBRARIES
+    ${LIBFT4222_LIBRARY}
+	)
+
+  if (LIBFT4222_INCLUDE_DIRS AND LIBFT4222_LIBRARIES)
+    set(LIBFT4222_FOUND TRUE)
+  endif (LIBFT4222_INCLUDE_DIRS AND LIBFT4222_LIBRARIES)
+
+  if (LIBFT4222_FOUND)
+    if (NOT LIBFT4222_FIND_QUIETLY)
+	  message(STATUS "Found LIBFT4222: ${LIBFT4222_LIBRARIES}")
+    endif (NOT LIBFT4222_FIND_QUIETLY)
+  else (LIBFT4222_FOUND)
+    if (LIBFT4222_FIND_REQUIRED)
+	  message(FATAL_ERROR "Could not find LIBFT4222")
+    endif (LIBFT4222_FIND_REQUIRED)
+  endif (LIBFT4222_FOUND)
+
+  # show the LIBFT4222_INCLUDE_DIRS and LIBFT4222_LIBRARIES variables only in the advanced view
+  mark_as_advanced(LIBFT4222_INCLUDE_DIRS LIBFT4222_LIBRARIES)
+
+endif (LIBFT4222_LIBRARIES AND LIBFT4222_INCLUDE_DIRS)
+

examples/CMakeLists.txt

@@ -14,7 +14,7 @@ add_executable (mraa-i2c mraa-i2c.c)
 add_executable (spi_max7219 spi_max7219.c)
 
 include_directories(${PROJECT_SOURCE_DIR}/api)
-# FIXME Hack to access internal types used by mraa-i2c
+# FIXME Hack to access mraa internal types used by mraa-i2c
 include_directories(${PROJECT_SOURCE_DIR}/include)
 include_directories(${PROJECT_SOURCE_DIR}/api/mraa)
 

src/CMakeLists.txt

@@ -48,7 +48,7 @@ if (ARMPLAT)
 endif()
 
 if (USBPLAT)
-  add_subdirectory(usb)
+  message (INFO " - Adding USB platforms")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSBPLAT=1")
   find_package (Ftd2xx)
   if (FTDID2xx)
@@ -59,9 +59,18 @@ if (USBPLAT)
       message (WARNING " - Enabled FTDID2xx support but library not found")
     endif ()
   endif ()
+  find_package (Ftd4222)
+  if (FTDI4222)
+    if (${LIBFT4222_FOUND})
+      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DFTDI4222=1")
+      set (mraa_LIBS ${mraa_LIBS} ${LIBFT4222_LIBRARIES})
+    else ()
+      message (WARNING " - Enabled FTDI4222 support but library not found")
+    endif ()
+  endif ()
+  add_subdirectory(usb)
 endif ()
 
-
 set (mraa_LIB_SRCS
   ${mraa_LIB_PLAT_SRCS_NOAUTO}
 # autogenerated version file

src/usb/CMakeLists.txt

@@ -1,12 +1,14 @@
-message (INFO " - Adding USB platforms")
 set (mraa_LIB_SRCS_NOAUTO ${mraa_LIB_SRCS_NOAUTO}
   ${PROJECT_SOURCE_DIR}/src/usb/usb.c
-  PARENT_SCOPE
 )
-if (FTDID2XX)
-  set (mraa_LIB_SRCS_NOAUTO
+
+if (FTDI4222)
+   message (INFO " - FTDI4222")
+  set (mraa_LIB_SRCS_NOAUTO ${mraa_LIB_SRCS_NOAUTO}
     ${PROJECT_SOURCE_DIR}/src/usb/ftdi_ft4222.c
     PARENT_SCOPE
   )
 endif ()
 
+
+

src/usb/usb.c

@@ -26,7 +26,7 @@
 #include <string.h>
 
 #include "mraa_internal.h"
-#ifdef FTDID2XX
+#ifdef FTDI4222
 #include "usb/ftdi_ft4222.h"
 #endif
 
@@ -35,7 +35,7 @@ mraa_platform_t
 mraa_usb_platform_extender(mraa_board_t* board)
 {
     mraa_platform_t platform_type = MRAA_UNKNOWN_PLATFORM;
-#ifdef FTDID2XX
+#ifdef FTDI4222
     if (mraa_ftdi_ft4222_init() == MRAA_SUCCESS) {
         unsigned int versionChip, versionLib;
         if (mraa_ftdi_ft4222_get_version(&versionChip, &versionLib) == MRAA_SUCCESS) {
@@ -43,13 +43,17 @@ mraa_usb_platform_extender(mraa_board_t* board)
             platform_type = MRAA_FTDI_FT4222;        
         }
     }  
+#endif
     switch (platform_type) {
+#ifdef FTDI4222
         case MRAA_FTDI_FT4222:
             mraa_ftdi_ft4222(board);
             break;
+#endif
         default:
             syslog(LOG_ERR, "Unknown USB Platform Extender, currently not supported by MRAA");
     }
-#endif
+
     return platform_type;
 }
+