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Platform_extender: FT4222 library refactor

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Updates to make the FT4222 platform extender more usable.

Previous implementation opened libft4222.so and loaded symbols as
needed.  This implementation removes dynamic loading of libft4222 in
favor of creating a new shared libary which links against libft4222.so.
The dynamic loading is now done in mraa.c.  One C method is exposed in
libmraa-platform-ft4222.so for finding/initializing an FT4222:

mraa_platform_t mraa_usb_platform_extender(mraa_board_t* board);

Mraa.c attempts to open this platform library and calls the
mraa_usb_platform_extender method.  If an ftdi4222 is connected, the
user gets added IO from the extender.  If no FT4222 device is connected,
continue as normal.

    * Create a new platform library for the FT4222
    * Expose only 1 C method from the library -
      mraa_usb_platform_extender
    * libmraa-platform-ft4222.so contains CXX code (as well as previous
      C code).  All *allocs have been removed in favor of global
      C++ stl containers.
    * Previously, the FT4222 would only initialize correctly if 2 ftdi
      devices existed.  Now, initialize FT4222 devices based on the
      device id.
    * Many fixes for various problems with the FT4222
    * Added unit test for platform extender (minimal functionality w/o hw)
    * Updated to FindFtd4222.cmake module to handle standard arguments
    * Removed CMAKE_C_FLAGS addition of -DFTDID2XX and -DFTDI4222 since
      these are NOT used anywhere in source.
    * Building the FTDI4222 shim requires libft4222.h which requires
      ftd2xx.h.  Updated CMakeLists.txt to require both when building
      the shim.

Signed-off-by: Noel Eck <noel.eck@intel.com>
This commit is contained in:
Noel Eck
2018-06-01 14:59:39 -07:00
parent 47728b4c1d
commit fc4b2a554d
15 changed files with 1591 additions and 1291 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
cmake/modules/FindFtd2xx.cmake
View File

@@ -27,11 +27,11 @@ else (LIBFTD2XX_LIBRARIES AND LIBFTD2XX_INCLUDE_DIRS)
/usr/local/include
/opt/local/include
/sw/include
)
)
SET(FTD2XX_LIBNAME ftd2xx)
IF(WIN32)
SET(FTD2XX_LIBNAME ftd2xx.lib)
SET(FTD2XX_LIBNAME ftd2xx.lib)
ENDIF(WIN32)
find_library(LIBFTD2XX_LIBRARY
@@ -42,16 +42,16 @@ else (LIBFTD2XX_LIBRARIES AND LIBFTD2XX_INCLUDE_DIRS)
/usr/local/lib
/opt/local/lib
/sw/lib
)
)
if(LIBFTD2XX_INCLUDE_DIR)
set(LIBFTD2XX_INCLUDE_DIRS
set(LIBFTD2XX_INCLUDE_DIRS
${LIBFTD2XX_INCLUDE_DIR}
)
)
endif(LIBFTD2XX_INCLUDE_DIR)
set(LIBFTD2XX_LIBRARIES
${LIBFTD2XX_LIBRARY}
)
)
if (LIBFTD2XX_INCLUDE_DIRS AND LIBFTD2XX_LIBRARIES)
set(LIBFTD2XX_FOUND TRUE)
@@ -59,14 +59,17 @@ else (LIBFTD2XX_LIBRARIES AND LIBFTD2XX_INCLUDE_DIRS)
if (LIBFTD2XX_FOUND)
if (NOT libftd2xx_FIND_QUIETLY)
message(STATUS "Found libftd2xx: ${LIBFTD2XX_LIBRARIES}")
message(STATUS "Found libftd2xx: ${LIBFTD2XX_LIBRARIES}")
endif (NOT libftd2xx_FIND_QUIETLY)
else (LIBFTD2XX_FOUND)
if (libftd2xx_FIND_REQUIRED)
message(FATAL_ERROR "Could not find libftd2xx")
message(FATAL_ERROR "Could not find libftd2xx")
endif (libftd2xx_FIND_REQUIRED)
endif (LIBFTD2XX_FOUND)
find_package_handle_standard_args(Ftd2xx
REQUIRED_VARS LIBFTD2XX_INCLUDE_DIRS)
# show the LIBFTD2XX_INCLUDE_DIRS and LIBFTD2XX_LIBRARIES variables only in the advanced view
mark_as_advanced(LIBFTD2XX_INCLUDE_DIRS LIBFTD2XX_LIBRARIES)

19
cmake/modules/FindFtd4222.cmake
View File

@@ -28,11 +28,11 @@ else (LIBFT4222_LIBRARIES AND LIBFT4222_INCLUDE_DIRS)
/usr/local/include
/opt/local/include
/sw/include
)
)
SET(FTD4222_LIBNAME ft4222)
IF(WIN32)
SET(FTD4222_LIBNAME LibFT4222.lib)
SET(FTD4222_LIBNAME LibFT4222.lib)
ENDIF(WIN32)
find_library(LIBFT4222_LIBRARY
@@ -43,16 +43,16 @@ else (LIBFT4222_LIBRARIES AND LIBFT4222_INCLUDE_DIRS)
/usr/local/lib
/opt/local/lib
/sw/lib
)
)
if(LIBFT4222_INCLUDE_DIR)
set(LIBFT4222_INCLUDE_DIRS
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)
@@ -60,14 +60,17 @@ else (LIBFT4222_LIBRARIES AND LIBFT4222_INCLUDE_DIRS)
if (LIBFT4222_FOUND)
if (NOT LIBFT4222_FIND_QUIETLY)
message(STATUS "Found LIBFT4222: ${LIBFT4222_LIBRARIES}")
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")
message(FATAL_ERROR "Could not find LIBFT4222")
endif (LIBFT4222_FIND_REQUIRED)
endif (LIBFT4222_FOUND)
find_package_handle_standard_args(Ftd4222
REQUIRED_VARS LIBFT4222_INCLUDE_DIRS LIBFT4222_LIBRARIES)
# show the LIBFT4222_INCLUDE_DIRS and LIBFT4222_LIBRARIES variables only in the advanced view
mark_as_advanced(LIBFT4222_INCLUDE_DIRS LIBFT4222_LIBRARIES)

1
docker-compose.yaml
View File

@@ -108,6 +108,7 @@ services:
ftdi4442:
extends: all
environment:
- USBPLAT=ON
- FTDI4222=ON
command: bash -c "./scripts/run-cmake.sh && make -Cbuild"

7
include/mraa_internal.h
View File

@@ -79,13 +79,6 @@ mraa_platform_t mraa_mips_platform();
*/
mraa_platform_t mraa_mock_platform();
/**
* runtime detect running usb platform extender
*
* @return mraa_platform_t of the detected platform extender
*/
mraa_platform_t mraa_usb_platform_extender(mraa_board_t* board);
/**
* runtime detect iio subsystem
*

12
include/mraa_internal_types.h
View File

@@ -497,3 +497,15 @@ typedef struct {
uint8_t iio_device_count; /**< IIO device count */
} mraa_iio_info_t;
#endif
/**
* Function pointer typedef for use with platform extender libraries.
* Currently only the FT42222.
*
* @param board Pointer to valid board structure. If a mraa_board_t
* is initialized, it will be added to board->sub_platform
*
* @return MRAA_SUCCESS if a valid subplaform has been initialized,
* otherwise return MRAA_ERROR_PLATFORM_NOT_INITIALISED
*/
typedef mraa_result_t (*fptr_add_platform_extender)(mraa_board_t* board);

14
src/CMakeLists.txt
View File

@@ -176,22 +176,26 @@ endif()
if (USBPLAT)
message (STATUS "INFO - Adding USB platforms")
# USBPLAT is used in mraa.c to decide whether to attempt to load sub-platforms
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSBPLAT=1")
# Loading an FTDI platform extender library using dlopen requires
# mraa to link against libdl. Mraa does NOT link directly to the
# FT4222 shim library.
set (mraa_LIBS ${mraa_LIBS} dl)
if (FTDID2xx)
find_package (Ftd2xx)
if (${LIBFTD2XX_FOUND})
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DFTDID2XX=1")
set (mraa_LIBS ${mraa_LIBS} ${LIBFTD2XX_LIBRARIES})
else ()
message (SEND_ERROR "Enabled FTDID2xx support but library not found")
endif ()
endif ()
# The FTDI4222 shim includes libft4222.h (which includes ftd2xx.h), make sure
# both exist if building the FTDI4222 shim library
if (FTDI4222)
find_package (Ftd2xx REQUIRED)
find_package (Ftd4222)
if (${LIBFT4222_FOUND})
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DFTDI4222=1")
set (mraa_LIBS ${mraa_LIBS} dl)
else ()
if (NOT ${LIBFT4222_FOUND})
message (SEND_ERROR "Enabled FTDI4222 support but library not found")
endif ()
endif ()

31
src/mraa.c
View File

@@ -29,6 +29,7 @@
#endif
#include <stddef.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <sched.h>
#include <string.h>
@@ -195,18 +196,21 @@ imraa_init()
}
#if defined(USBPLAT)
// Now detect sub platform, note this is not an else since we could be in
// an error case and fall through to MRAA_ERROR_PLATFORM_NOT_INITIALISED
if (plat != NULL) {
mraa_platform_t usb_platform_type = mraa_usb_platform_extender(plat);
// if we have no known platform just replace usb platform with platform
if (plat->platform_type == MRAA_UNKNOWN_PLATFORM && usb_platform_type != MRAA_UNKNOWN_PLATFORM) {
plat->platform_type = usb_platform_type;
}
}
if (plat == NULL) {
printf("mraa: FATAL error, failed to initialise platform\n");
return MRAA_ERROR_PLATFORM_NOT_INITIALISED;
syslog(LOG_NOTICE, "Searching for USB plaform extender libraries...");
/* If a usb platform lib is present, attempt to load and look for
* necessary symbols for adding extended I/O */
void* usblib = dlopen("libmraa-platform-ft4222.so", RTLD_LAZY);
if (usblib)
{
syslog(LOG_NOTICE, "Found USB platform extender library: libmraa-platform-ft4222.so");
syslog(LOG_NOTICE, "Detecting FT4222 subplatforms...");
fptr_add_platform_extender add_ft4222_platform =
(fptr_add_platform_extender)dlsym(usblib, "mraa_usb_platform_extender");
/* If this method exists, call it to add a subplatform */
syslog(LOG_NOTICE, "Detecting FT4222 subplatforms complete, found %i subplatform/s",
((add_ft4222_platform != NULL) && (add_ft4222_platform(plat) == MRAA_SUCCESS))
? 1 : 0);
}
#endif
@@ -273,7 +277,8 @@ mraa_deinit()
free(plat->adv_func);
}
mraa_board_t* sub_plat = plat->sub_platform;
if (sub_plat != NULL) {
/* No alloc's in an FTDI_FT4222 platform structure */
if ((sub_plat != NULL) && (sub_plat->platform_type != MRAA_FTDI_FT4222)) {
if (sub_plat->pins != NULL) {
free(sub_plat->pins);
}

13
src/usb/CMakeLists.txt
View File

@@ -1,12 +1 @@
set (mraa_LIB_USB_SRCS_NOAUTO ${PROJECT_SOURCE_DIR}/src/usb/usb.c)
if (FTDI4222)
message (INFO " - FTDI4222")
set (mraa_LIB_USB_SRCS_NOAUTO ${mraa_LIB_USB_SRCS_NOAUTO}
${PROJECT_SOURCE_DIR}/src/usb/ftdi_ft4222.c
)
endif ()
set (mraa_LIB_PLAT_SRCS_NOAUTO ${mraa_LIB_PLAT_SRCS_NOAUTO}
${mraa_LIB_USB_SRCS_NOAUTO} PARENT_SCOPE)
add_subdirectory(ft4222)

19
src/usb/ft4222/CMakeLists.txt Normal file
View File

@@ -0,0 +1,19 @@
if (FTDI4222)
set(target_name mraa-platform-ft4222)
add_library(${target_name} SHARED ftdi_ft4222.cxx ftdi_ft4222.hpp)
target_link_libraries(${target_name} ${LIBFT4222_LIBRARIES})
install(TARGETS ${target_name} DESTINATION ${LIB_INSTALL_DIR})
set_target_properties(
${target_name}
PROPERTIES
SOVERSION ${mraa_VERSION_MAJOR}
VERSION ${mraa_VERSION_STRING}
)
if (MSYS)
# Under MSYS we have to put our generated DLL into bin, otherwise it's not picked up
install(TARGETS ${target_name} DESTINATION ${CMAKE_INSTALL_BINDIR})
else ()
install(TARGETS ${target_name} DESTINATION ${LIB_INSTALL_DIR})
endif ()
endif()

1451
src/usb/ft4222/ftdi_ft4222.cxx Normal file
View File

File diff suppressed because it is too large Load Diff

21
include/usb/ftdi_ft4222.h → src/usb/ft4222/ftdi_ft4222.hpp
View File

@@ -1,3 +1,6 @@
#ifndef _EXPORT_USERS_NECK_MRAA_FT4222_SRC_USB_FT4222_FTDI_FT4222_HPP
#define _EXPORT_USERS_NECK_MRAA_FT4222_SRC_USB_FT4222_FTDI_FT4222_HPP
/*
* Author: Henry Bruce <henry.bruce@intel.com>
* Copyright (c) 2015 Intel Corporation.
@@ -26,16 +29,22 @@
#ifdef __cplusplus
extern "C" {
#endif
#include <dlfcn.h>
#include "mraa_internal.h"
mraa_result_t mraa_ftdi_ft4222_init();
mraa_result_t mraa_ftdi_ft4222_get_version(unsigned int* versionChip, unsigned int* versionLib);
mraa_board_t* mraa_ftdi_ft4222();
void *libft4222_lib;
/**
* Attempt to initialize a mraa_board_t for a UMFT4222EV module
*
* @param board Pointer to valid board structure. If a mraa_board_t
* is initialized, it will be added to board->sub_platform
*
* @return MRAA_SUCCESS if a valid subplaform has been initialized,
* otherwise return MRAA_ERROR_PLATFORM_NOT_INITIALISED
*/
mraa_result_t mraa_usb_platform_extender(mraa_board_t* board);
#ifdef __cplusplus
}
#endif
#endif

1161
src/usb/ftdi_ft4222.c
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File diff suppressed because it is too large Load Diff

70
src/usb/usb.c
View File

@@ -1,70 +0,0 @@
/*
* Author: Henry Bruce <henry.bruce@intel.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include "mraa_internal.h"
#ifdef FTDI4222
#include "usb/ftdi_ft4222.h"
#endif
mraa_platform_t
mraa_usb_platform_extender(mraa_board_t* board)
{
mraa_board_t* sub_plat = NULL;
mraa_platform_t platform_type = MRAA_UNKNOWN_PLATFORM;
#ifdef FTDI4222
libft4222_lib = dlopen("libft4222.so", RTLD_LAZY);
if (!libft4222_lib) {
syslog(LOG_WARNING, "libft4222.so not found, skipping");
} else {
if (mraa_ftdi_ft4222_init() == MRAA_SUCCESS) {
unsigned int versionChip, versionLib;
if (mraa_ftdi_ft4222_get_version(&versionChip, &versionLib) == MRAA_SUCCESS) {
// TODO: Add ft4222 version checks
platform_type = MRAA_FTDI_FT4222;
}
}
}
#endif
switch (platform_type) {
#ifdef FTDI4222
case MRAA_FTDI_FT4222:
sub_plat = mraa_ftdi_ft4222();
break;
#endif
default:
// this is not an error but more that we didn't find a USB platform extender we recognise
syslog(LOG_DEBUG, "Unknown USB Platform Extender, currently not supported by MRAA");
}
if (sub_plat != NULL) {
sub_plat->platform_type = platform_type;
board->sub_platform = sub_plat;
}
return platform_type;
}

13
tests/unit/CMakeLists.txt
View File

@@ -20,9 +20,20 @@ target_link_libraries(api_common_hpp_unit GTest::GTest GTest::Main mraa)
target_include_directories(api_common_hpp_unit PRIVATE "${CMAKE_SOURCE_DIR}/api")
gtest_add_tests(api_common_hpp_unit "" AUTO)
if (FTDI4222)
# Unit tests - Test platform extenders (as much as possible)
add_executable(platform_extender platform_extender/platform_extender.cxx)
target_link_libraries(platform_extender GTest::GTest GTest::Main mraa-platform-ft4222 dl)
target_include_directories(platform_extender PRIVATE "${PROJECT_SOURCE_DIR}/api"
"${PROJECT_SOURCE_DIR}/api/mraa"
"${PROJECT_SOURCE_DIR}/include")
gtest_add_tests(platform_extender "" AUTO)
endif ()
# Add a custom target for unit tests
add_custom_target(tests-unit ALL
DEPENDS
api_common_h_unit
api_common_hpp_unit
COMMENT "mraa unit test collection")
platform_extender
COMMENT "mraa unit test collection")

31
tests/unit/platform_extender/platform_extender.cxx Normal file
View File

@@ -0,0 +1,31 @@
#include <dlfcn.h>
#include "gtest/gtest.h"
#include "mraa/common.h"
#include "mraa_internal_types.h"
/* MRAA test fixture */
class plaform_extender : public ::testing::Test {};
/* Not much to test w/o hw - test a no-init case.
* Note, w/o a link to libmraa, this binary does NOT initialize mraa
* with the loader constructor attribute. This is intended. */
TEST_F(plaform_extender, test_no_init)
{
mraa_board_t plat = {};
void* usblib = dlopen("libmraa-platform-ft4222.so", RTLD_LAZY);
ASSERT_NE((void*)NULL, usblib)
<< "Failed to load libmraa-platform-ft4222.so, reason (" << dlerror()
<< ")";
fptr_add_platform_extender add_ft4222_platform =
(fptr_add_platform_extender)dlsym(usblib, "mraa_usb_platform_extender");
ASSERT_NE((void*)NULL, add_ft4222_platform) << "Symbol 'add_ft4222_platform' "
<< "does not exist in libmraa-platform-ft4222.so";
ASSERT_EQ(MRAA_ERROR_PLATFORM_NOT_INITIALISED, add_ft4222_platform(&plat))
<< "Initialization returned a valid platform. Make sure no Ft4222 "
<< "device is connected";
}