README
======
This directory contains a collection of Unit Tests that can be used to verify
NXWidgets.:
Contents
========
o Installing and Building the Unit Tests
1. Setup NuttX
a) Configure NuttX
b) Enable C++ Support
c) Enable Debug Options
d) Other Possible nuttx/.config changes
e) Other Possible apps/.config changes
2. Configure in the Selected Unit Test
o Work-Arounds
1. Build Issues
2. Stack Size Issues with the X11 Simulation
o Theory of Operation
o Unit Test Directories
o Example
Installing and Building the Unit Tests
======================================
1. Setup NuttX
a) Configure NuttX
Configure NuttX to run one of the target configurations. For example,
let's assume that you are using the sim/nsh2 configuration. The sim/nsh2
configuration was specially created for use NXWidgets on the simulation
platform. A similar, special configuration stm3210e-eval/nsh2 is also
for the STM3210E-EVAL available. However, the unit test can be run on
other configurations (see steps d and e below).
We will assume the sim/nsh2 configuration in this discussion. The
sim/nsh2 configuration is installed as follows:
cd <nuttx-directory-path>
make distclean
cd tools
./configure.sh sim/nsh2
Where:
<nuttx-directory-path> is the full, absolute path to the NuttX build directory
If you are using the sim/nsh2 or stm3210e-eval configurations, then skip
to step 2.
There may be certain requirements for the configuration that you select...
for example, certain widget tests may require touchscreen support or special
font selections. These test-specific requirements are addressed below under
"Unit Test Directories"
b) Enable C++ Support
If you are not using the sim/nsh2 or stm3210e-eval, you will need to add
the following definitions to the nuttx configuration at nuttx/.config to
enable C++ support:
CONFIG_HAVE_CXX=y
Check first, some configurations already have C++ support enabled (As of this
writing *ONLY* the sim/nsh2 and stm321-e-eval configurations have C++ support
pre-enabled).
c) Enable Debug Options
If you are running on a simulated target, then you might also want to
enable debug symbols:
CONFIG_DEBUG_SYMBOLS=y
Then you can run the simulation using GDB or DDD which is a very powerful
debugging environment!
d) Other nuttx/.config changes -- NSH configurations only.
If the configuration that you are using supports NSH and NSH built-in tasks
then all is well. If it is an NSH configuration, then you will have to define
the following in your nuttx/.config file as well (if it is not already defined):
CONFIG_NSH_BUILTIN_APPS=y
sim/nsh2 and stm3210e-eval/nsh2 already has this setting. You do not need
to change anything further in the nuttx/.config file if you are using either
of these configurations.
e) Other apps/.config changes -- NON-NSH configurations only.
For non-NSH configurations (such as the sim/touchscreen) you will have to
remove the CONFIGURED_APPS seting that contains the user_start function so
that you use the user_start in the unit test code instead. So, for example,
with the sim/touchscreen configuration you need to remove the following from
the apps/.config file:
CONFIGURED_APPS += examples/<example> ## REMOVE
The following step will then install the new, correct directory containing
the user_start function for the selected unit test. If you see that NSH
is configured:
CONFIGURED_APPS += examples/nsh ## DO NOT REMOVE
Then DO NOT REMOVE the CONFIGURED_APPS setting. Go back and re-read c)
above. Do either c) or d). Don't do both!
sim/nsh2 and stm3210e-eval/nsh2 both NSH configurations. You do not need
to change anything further in the apps/.config file for any NSH configuration.
2. Configure/Install the Selected Unit Test
Then reconfigure that to use the Unit Test of your choice:
cd <nxwidgets-directory>/tools
./install.sh <apps-directory-path> <test-sub-directory>
Where:
<apps-directory-path> is the full, absolute path to the NuttX apps/ directory
<test-sub-directory> is the name of a sub-directory in the UnitTests directory
3. Instantiate the Configuration
Before we can make the NXWidgets Library, we have to instantiate the NuttX
configuration with the installed unit test:
cd <nuttx-directory-path>
. ./setenv.sh
make context
This will create auto-generated files and will setup symbolic links needed
in order to build the NXWidgets Library.
4. Adjust the Stack Size
If using an simulation configuration (like sim/nsh2) and your unit test
uses X11 as its display device, then you would have to increase the size
of unit test stack as described below under "Stack Size Issues with the
X11 Simulation."
5. Build the NXWidgets Library
cd <nxwidgets-directory>/libnxwidgets
make TOPDIR=<nuttx-directory-path>
6. Build NuttX including the unit test and the NXWidgets library
cd <nuttx-directory-path>
. ./setenv.sh
make
Work-Arounds
============
Build Issues
------------
1. I have seen this error on Cygwin building C++ code:
LD: nuttx.rel
ld: skipping incompatible /home/patacongo/projects/nuttx/nuttx/trunk/nuttx/libxx//liblibxx.a when searching for -llibxx
ld: cannot find -llibxx
The problem seems to be caused because gcc build code for 32-bit mode and g++ builds code for 64-bit mode. Add the -m32 option to the g++ command line seems to fix the problem. In Make.defs:
CXXFLAGS = -m32 $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) \
$(ARCHCPUFLAGSXX) $(ARCHINCLUDESXX) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
2. Stack Size Issues with the X11 Simulation
When you run the NuttX simulation, it uses stacks allocated by NuttX from the
NuttX heap. The memory management model is exactly the same in the simulation
as it is real, target system. This is good because this produces a higher
fidelity simulation.
However, when the simulation calls into Linux/Cygwin libraries, it will still
use these small simulation stacks. This happens, for example, when you call
into the system to get and put characters to the console window or when you
make x11 calls into the system. The programming model within those libraries
will assume a Linux/Cygwin environment where the stack size grows dynamically
As a consequence, those system libraries may allocate large data structures
on the stack and overflow the small NuttX stacks. X11, in particular,
requires large stacks. If you are using X11 in the simulation, make sure
that you set aside a "lot" of stack for the X11 system calls (maybe 8 or 16Kb).
The stack size for the thread that begins with user start is controlled
by the configuration setting CONFIG_USERMAIN_STACKSIZE; you may need to
increase this value to larger number to survive the X11 system calls.
If you are running X11 applications as NSH add-on programs, then the stack
size of the add-on program is controlled in another way. Here are the
steps for increasing the stack size in that case:
cd ../apps/namedapps # Go to the namedapps directory
vi namedapps_list.h # Edit this file and increase the stack size of the add-on
rm .built *.o # This will force the namedapps logic to rebuild
Theory Of Operation
===================
The NuttX application Makefile at apps/Makefile has some special hooks for
building "external" applications. In particular, it will automatically
build in the contents any directory call "external/" that may appear in the
apps/ directory. There is no external/ directory in the repository. Rather,
this directory may be provided by the user (possibly as a symbolic link) to
add libraries and applications to the standard build from the repository.
The script at tools/install.sh, then, just does a lot of careful validation and
sanity checking. Then it installs the UnitTest test sub-directory in the apps/
directory by creating a symbolic link in the apps/ directory call "external".
That symbolic link will refer to the selected UnitTest sub-directory.
UnitTests
=========
The following provide simple unit tests for each of the NXWidgets. In
addition, these unit tests provide examples for the use of each widget
type.
CButton
Exercises the CButton widget
Depends on CLabel
CButtonArray
Exercises the CButtonArray widget
CCheckBox
Exercises the CCheckBox widget
Depends on CLabel and CButton.
CGlyphButton
Exercises the CGlyphButton widget.
Depends on CLabel and CButton.
CImage
Exercises the CImage widget
CLabel
Exercises the CLabel widget
CProgressBar
Exercises the CProgressBar widget
CRadioButton
Exercises the CRadioButton and CRadioButtonGroup widgets.
Depends on CLabel and CButton
CScrollBarHorizontal
Exercises the ScrollbarHorizontal
Depends on CSliderHorizontal and CGlyphButton
CScrollBarVertical
Exercises the ScrollbarHorizontal
Depends on CSliderVertical and CGlyphButton
CSliderHorizontal
Exercises the CSliderHorizontal
Depends on CSliderHorizontalGrip
CSliderVertical
Exercises the CSliderVertical
Depends on CSliderVerticalGrip
CTextBox
Exercises the CTextBox widget
Depends on CLabel
Example
=======
1. Configure sim/nsh2
Where: nuttx and nuttx/tools directory
$ cd tools/
$ ./configure.sh sim/nsh2
$ cd -
2. Edit nuttx/.config to enable C++ support
Do nothing... sim/nsh2 already has C++ support enabled.
3. Install the CButton C++ application (for example)
Where: <nxwidgets-directory>/tool
$ ./install.sh ~/projects/nuttx/nuttx/trunk/apps/ CButton
/home/patacongo/projects/nuttx/nuttx/trunk/apps//external already exists...
Removing the old symbolic link.
Creating symbolic link
- To /home/patacongo/projects/nuttx/nuttx/trunk/NxWidgets/UnitTests/CButton
- At /home/patacongo/projects/nuttx/nuttx/trunk/apps//external
4. Instantiate the Configuration
Where: nuttx directory
$ cd /home/patacongo/projects/nuttx/nuttx/trunk/nuttx
$ . ./setenv.sh
$ make context
This will create auto-generated files and will setup symbolic links needed
in order to build the NXWidgets Library.
6. Adjust the Stack Size
If using an simulation configuration (like sim/nsh2) and your unit test
uses X11 as its display device, then you would have to increase the size
of unit test stack as described above under "Stack Size Issues."
7. Build the NXWdigets Library
Where <nxwidgets-directory>/libnxwidgets
$ cd /home/patacongo/projects/nuttx/nuttx/trunk/NxWidgets/libnxwidgets
$ make TOPDIR=/home/patacongo/projects/nuttx/nuttx/trunk/nuttx
8. Build NuttX
Where: nuttx directory
$ cd /home/patacongo/projects/nuttx/nuttx/trunk/nuttx
$ make
...
8. Run the "bringup" task:
a. Start NuttX
Where: nuttx directory
./nuttx
NuttShell (NSH) NuttX-6.9
nsh>
b. Execute NuttX
Where: NSH command prompt
NOTE that when you run NSH as a simulation, the commands are echoed
twice -- once by Linux/Cygwin and once by NuttX:
nsh> help
help
...
Builtin Apps:
nx
nxhello
tc
bringup
nsh> bringup
bringup
bringup [2:128]
c. Then do a kludgy thing
Where: NSH command prompt
The I/O with the Linux/Cygwin simulation is blocking. So while NSH is
waiting for input nothing can run (see configs/sim/README.txt for more info).
One way to make NSH stop asking for input is to sleep.
nsh> sleep 10
sleep 10
NOTE 1: This is not a problem if CONFIG_SCHED_WAITPID is defined in the
configuration file. If CONFIG_SCHED_WAITPID is defined, NSH will wait
for the unit test to complete and it will not be necessary to sleep.
NOTE 2: CONFIG_SCHED_WAITPID is defined in the sim/nsh2 configuration
so you can probably ignore this kludgy thing.
d. The Unit Test runs
As soon as NSH sleeps, the unit test will run:
bringup_main: Saying hello from the dynamically constructed instance
CHelloWorld::HelloWorld: Hello, World!!
bringup_main: Saying hello from the instance constructed on the stack
CHelloWorld::HelloWorld: Hello, World!!
bringup_main: Saying hello from the statically constructed instance
CHelloWorld::HelloWorld: Hello, World!!
8. Debugging
Where: nuttx directory
In the simulation (only) you can use GDB or, better, the graphic
front-end DDD to debug the code. Most embedded targets do not
have good debugging capabilities.
In order to debug, you have to have build with CONFIG_DEBUG_SYMBOLS=y.
This setting is preselected in the sim/nsh2 configuration so that
you don't have to do anything.
Then under Linux or in a Cygwin X11 window, you can start the graphic
debugger like:
ddd nuttx &
d4f2f57522