configs/lpcxpresso-lpc54628: Add a Twm4Nx configuration.

configs/lpcxpresso-lpc54628/README.txt

@@ -508,3 +508,20 @@ Configurations
     graphic (based on the rotating line of apps/examples/nslines).
 
       2019-03-20:  Everything works fine!
+
+  twm4nx:
+
+    This configuration exercises the port of TWM to NuttX.  A description of
+    that port is available at apps/graphics/twm4nx/README.txt.
+
+    NOTES:
+    1. This version uses the on-board display with the touchscreen for
+       positional input (instead of a mouse).  Keyboard input is currently
+       disabled only because (1) there is no Twm4Nx application that needs
+       it, and (2) I will first need to create a USB host driver to support
+       a USB keyboard.
+
+    STATUS:
+    2019-05-04:  Initial display is clean but touchscren input is not yet
+       functional.  Left-click main menu functionality is required to test
+       much more.

configs/lpcxpresso-lpc54628/twm4nx/defconfig

@@ -0,0 +1,99 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_ARCH_FPU is not set
+# CONFIG_NXFONTS_DISABLE_16BPP is not set
+# CONFIG_NXTK_DEFAULT_BORDERCOLORS is not set
+# CONFIG_NX_DISABLE_16BPP is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="lpcxpresso-lpc54628"
+CONFIG_ARCH_BOARD_LPCXPRESSO_LPC54628=y
+CONFIG_ARCH_CHIP_LPC54628=y
+CONFIG_ARCH_CHIP_LPC54XX=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARCH_STDARG_H=y
+CONFIG_BOARD_LOOPSPERMSEC=21082
+CONFIG_EXPERIMENTAL=y
+CONFIG_FS_PROCFS=y
+CONFIG_FT5X06_POLLMODE=y
+CONFIG_FT5X06_SINGLEPOINT=y
+CONFIG_FT5X06_SWAPXY=y
+CONFIG_GRAPHICS_TWM4NX=y
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_INPUT=y
+CONFIG_INPUT_FT5X06=y
+CONFIG_LIB_HOSTNAME="LPCXpresso-LPC54628"
+CONFIG_LPC54_EMC=y
+CONFIG_LPC54_EMC_DYNAMIC_CS0=y
+CONFIG_LPC54_EMC_DYNAMIC_CS0_OFFSET=0x00080000
+CONFIG_LPC54_EMC_DYNAMIC_CS0_SIZE=0x00f80000
+CONFIG_LPC54_GPIOIRQ=y
+CONFIG_LPC54_I2C2_MASTER=y
+CONFIG_LPC54_LCD=y
+CONFIG_LPC54_LCD_BGR=y
+CONFIG_LPC54_LCD_BPP16_565=y
+CONFIG_LPC54_LCD_HBACKPORCH=43
+CONFIG_LPC54_LCD_HFRONTPORCH=8
+CONFIG_LPC54_LCD_VBACKPORCH=12
+CONFIG_LPC54_LCD_VFRONTPORCH=4
+CONFIG_LPC54_LCD_VPULSE=10
+CONFIG_LPC54_LCD_VRAMBASE=0xa0000000
+CONFIG_LPC54_USART0=y
+CONFIG_MAX_TASKS=16
+CONFIG_MAX_WDOGPARMS=2
+CONFIG_MM_REGIONS=2
+CONFIG_MQ_MAXMSGSIZE=64
+CONFIG_NFILE_DESCRIPTORS=8
+CONFIG_NFILE_STREAMS=8
+CONFIG_NX=y
+CONFIG_NXFONT_SANS22X29B=y
+CONFIG_NXFONT_SANS23X27=y
+CONFIG_NXTERM=y
+CONFIG_NXTERM_CACHESIZE=32
+CONFIG_NXTERM_CURSORCHAR=95
+CONFIG_NXTERM_MXCHARS=325
+CONFIG_NXTERM_NXKBDIN=y
+CONFIG_NXTK_BORDERCOLOR1=0x5cb7
+CONFIG_NXTK_BORDERCOLOR2=0x21c9
+CONFIG_NXTK_BORDERCOLOR3=0xffdf
+CONFIG_NXWIDGETS_BPP=16
+CONFIG_NXWIDGETS_CUSTOM_EDGECOLORS=y
+CONFIG_NXWIDGETS_CUSTOM_FILLCOLORS=y
+CONFIG_NXWIDGETS_DEFAULT_BACKGROUNDCOLOR=0x9dfb
+CONFIG_NXWIDGETS_DEFAULT_HIGHLIGHTCOLOR=0xc618
+CONFIG_NXWIDGETS_DEFAULT_SELECTEDBACKGROUNDCOLOR=0xd73e
+CONFIG_NXWIDGETS_DEFAULT_SHADOWEDGECOLOR=0x21e9
+CONFIG_NXWIDGETS_DEFAULT_SHINEEDGECOLOR=0xffdf
+CONFIG_NXWIDGETS_SIZEOFCHAR=1
+CONFIG_NX_BLOCKING=y
+CONFIG_NX_KBD=y
+CONFIG_NX_SWCURSOR=y
+CONFIG_NX_XYINPUT_TOUCHSCREEN=y
+CONFIG_PREALLOC_MQ_MSGS=64
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_PREALLOC_WDOGS=8
+CONFIG_RAM_SIZE=163840
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_ONEXIT=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_SDCLONE_DISABLE=y
+CONFIG_START_DAY=4
+CONFIG_START_MONTH=5
+CONFIG_START_YEAR=2019
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_TWM4NX_ARCHINIT=y
+CONFIG_TWM4NX_NOKEYBOARD=y
+CONFIG_TWM4NX_TOUCHSCREEN=y
+CONFIG_USART0_SERIAL_CONSOLE=y
+CONFIG_USER_ENTRYPOINT="twm4nx_main"
+CONFIG_WDOG_INTRESERVE=0

configs/same70-xplained/README.txt

@@ -1684,3 +1684,14 @@ Configuration sub-directories
 
     STATUS:
       2019-04-28:  Configuration created.  Not verified.
+      2019-05-04:  Only partially functional.  VNC is a difficult way to
+         debug Twm4Nx because it has its own level of complexities due to
+         networking, mysterious VNC client behavior, and fragile VNC
+         configurations.  I am setting this on the shelf for the time
+         being.  I will stabilize Twm4Nx on another platform first.  Just
+         too many degrees of freedom.
+      2019-05-04:  Testing on hardware reveals that VNC is the source of
+         most of the issues.  Things look good on real, local hardware
+         (see configs/lpcxpresso-lpc54628/twm4nx).  VNC is just not mature
+         enough for this kind of usage at this time.
+

configs/sim/README.txt

@@ -672,6 +672,9 @@ nsh2
      may not even be usable in all of those environments without some "tweaking"
      See discussion below under the nx11 configuration).
 
+     For examples, it expects to be able to include X11/Xlib.h.  That currently
+     fails on my Linux box.
+
 nx
 
   Configures to use apps/examples/nx.
@@ -851,6 +854,11 @@ nxwm
      However, I will leave the above text in place until I get then
      oppotunity to verify that the new UART simulation fixes the problem.
 
+  2019-05-04:  Something has changed.  Today this configuration failed
+    to build because is requires CONFIG_NX_XYINPUT=y in the configuration.
+    That indicates mouse or touchscreen support.  Apparently, the current
+    NxWM will not build without this support.
+
 ostest
 
   The "standard" NuttX apps/examples/ostest configuration.

graphics/Makefile

@@ -155,4 +155,3 @@ distclean: clean
 	$(call DELFILE, .depend)
 
 -include Make.dep
-

graphics/nxterm/nxterm_sem.c

@@ -98,11 +98,9 @@ int nxterm_semwait(FAR struct nxterm_state_s *priv)
 
 int nxterm_sempost(FAR struct nxterm_state_s *priv)
 {
-  pid_t me = getpid();
-
   /* Make sure that I really hold the semaphore */
 
-  DEBUGASSERT(priv->holder == me);
+  DEBUGASSERT(priv->holder == getpid());
 
   /* Then let go of it */