sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Add NX kbd input support to NxConsole

Browse Source 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4753 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-05-20 16:05:15 +00:00
parent 1d5e3bbc75
commit d2a564f8c8
11 changed files with 670 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
ChangeLog
View File

@ -2781,3 +2781,12 @@
things happen.
6.19 2012-xx-xx Gregory Nutt <gnutt@nuttx.org>
* graphics/nxconsole/nxcon_kbdin.c: If selected, the NxConsole will take
input from the NX keyboard input callback. If this option is set, then
the interface nxcon_kdbin() is enabled. That interface may be driven by
window callback functions so that keyboard input *only* goes to the top
window. If CONFIG_NXCONSOLE_NXKBDIN is not selected, then the NxConsole
will receive its input from stdin (/dev/console). This works great but
cannot be shared between different windows. Chaos will ensue if you
try to support multiple NxConsole windows without CONFIG_NXCONSOLE_NXKBDIN

24
Documentation/NXGraphicsSubsystem.html
View File

@ -3358,10 +3358,17 @@ int nxf_convert_32bpp(FAR uint32_t *dest, uint16_t height,
<h2>B.7 <a name="nxconsoleconfig">NxConsole Configuration Settings</a></h2>
<p>General NxConsole settings.</p>
<ul>
<dl>
<dt><code>CONFIG_NXCONSOLE</code>:
<dd>Enables building of the NxConsole driver.
</dl>
</ul>
<p>NxConsole output text/graphics options:</p>
<ul>
<dl>
<dt><code>CONFIG_NXCONSOLE_BPP</code>:
<dd>Currently, NxConsole supports only a single pixel depth.
This configuration setting must be provided to support that single pixel depth.
@ -3399,6 +3406,23 @@ int nxf_convert_32bpp(FAR uint32_t *dest, uint16_t height,
</dl>
</ul>
<p>NxConsole input options:</p>
<ul>
<dl>
<dt><code>CONFIG_NXCONSOLE_NXKBDIN</code>:
<dd>Take input from the NX keyboard input callback.
By default, keyboard input is taken from stdin (<code>/dev/console</code>).
If this option is set, then the interface<code>nxcon_kdbin()</code> is enabled.
That interface may be driven by window callback functions so that keyboard input <i>only</i> goes to the top window.
<dt><code>CONFIG__NXCONSOLE_KBDBUFSIZE</code>:
<dd>If <code>CONFIG_NXCONSOLE_NXKBDIN</code> is enabled, then this value may be used to
define the size of the per-window keyboar input buffer. Default: 16
<dt><code>CONFIG_NXCONSOLE_NPOLLWAITERS</code>:
<dd>The number of threads that can be waiting for read data available.
Default: 4
</dl>
</ul>
<table width ="100%">
<tr bgcolor="#e4e4e4">
<td>

4
graphics/Makefile
View File

@ -1,8 +1,8 @@
############################################################################
# graphics/Makefile
#
# Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <spudmonkey@racsa.co.cr>
# Copyright (C) 2008-2009, 2011-2012 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions

30
graphics/README.txt
View File

@ -232,6 +232,9 @@ Installing New Fonts
Configuration Settings
^^^^^^^^^^^^^^^^^^^^^^
General NX Settings
-------------------
CONFIG_NX
Enables overall support for graphics library and NX
CONFIG_NX_MULTIUSER
@ -273,6 +276,9 @@ CONFIG_NXFONTS_CHARBITS
The number of bits in the character set. Current options are only 7 and 8.
The default is 7.
Font Selections
---------------
CONFIG_NXFONT_SANS17X22
This option enables support for a tiny, 17x22 san serif font
(font ID FONTID_SANS17X22 == 14).
@ -325,10 +331,14 @@ CONFIG_NXFONT_SERIF38X49B
This option enables support for a large, 38x49 bold font (with serifs)
(font ID FONTID_SERIF38X49B == 13).
NxConsole Configuration Settings:
NxConsole Configuration Settings
--------------------------------
CONFIG_NXCONSOLE
Enables building of the NxConsole driver.
NxConsole output text/graphics options:
CONFIG_NXCONSOLE_BPP
Currently, NxConsole supports only a single pixel depth. This
configuration setting must be provided to support that single pixel depth.
@ -361,7 +371,23 @@ CONFIG_NXCONSOLE_NOWRAP
of the window. This setting can be defining to change this behavior so
that the text is simply truncated until a new line is encountered.
NX Multi-user only options:
NxConsole Input options
CONFIG_NXCONSOLE_NXKBDIN
Take input from the NX keyboard input callback. By default, keyboard
input is taken from stdin (/dev/console). If this option is set, then
the interface nxcon_kdbin() is enabled. That interface may be driven
by window callback functions so that keyboard input *only* goes to the
top window.
CONFIG__NXCONSOLE_KBDBUFSIZE
If CONFIG_NXCONSOLE_NXKBDIN is enabled, then this value may be used to
define the size of the per-window keyboard input buffer. Default: 16
CONFIG_NXCONSOLE_NPOLLWAITERS
The number of threads that can be waiting for read data available.
Default: 4
NX Multi-user only options
--------------------------
CONFIG_NX_BLOCKING
Open the client message queues in blocking mode. In this case,

4
graphics/nxconsole/Make.defs
View File

@ -39,6 +39,10 @@ NXCON_CSRCS += nxcon_redraw.c nxcon_register.c nxcon_scroll.c
NXCON_CSRCS += nxcon_vt100.c nxcon_unregister.c nxtk_register.c
NXCON_CSRCS += nxtool_register.c
ifeq ($(CONFIG_NXCONSOLE_NXKBDIN),y)
NXCON_CSRCS += nxcon_kbdin.c
endif
ifeq ($(CONFIG_DEBUG),y)
NXCON_CSRCS += nxcon_sem.c
endif

25
graphics/nxconsole/nxcon_driver.c
View File

@ -64,6 +64,24 @@ static ssize_t nxcon_write(FAR struct file *filep, FAR const char *buffer,
****************************************************************************/
/* This is the common NX driver file operations */
#ifdef CONFIG_NXCONSOLE_NXKBDIN
const struct file_operations g_nxcon_drvrops =
{
nxcon_open, /* open */
0, /* close */
nxcon_read, /* read */
nxcon_write, /* write */
0, /* seek */
0 /* ioctl */
#ifndef CONFIG_DISABLE_POLL
,
nxcon_poll /* poll */
#endif
};
#else /* CONFIG_NXCONSOLE_NXKBDIN */
const struct file_operations g_nxcon_drvrops =
{
nxcon_open, /* open */
@ -73,10 +91,13 @@ const struct file_operations g_nxcon_drvrops =
0, /* seek */
0 /* ioctl */
#ifndef CONFIG_DISABLE_POLL
, 0 /* poll */
,
0 /* poll */
#endif
};
#endif /* CONFIG_NXCONSOLE_NXKBDIN */
/****************************************************************************
* Private Data
****************************************************************************/
@ -104,11 +125,13 @@ static int nxcon_open(FAR struct file *filep)
/* Verify that the driver is opened for write-only access */
#ifndef CONFIG_NXCONSOLE_NXKBDIN
if ((filep->f_oflags & O_RDOK) != 0)
{
gdbg("Attempted open with read access\n");
return -EACCES;
}
#endif
/* Assign the driver structure to the file */

30
graphics/nxconsole/nxcon_internal.h
View File

@ -144,6 +144,9 @@ struct nxcon_state_s
#ifdef CONFIG_DEBUG
pid_t holder; /* Deadlock avoidance */
#endif
/* Text output support */
struct nxgl_point_s fpos; /* Next display position */
uint16_t maxchars; /* Size of the bm[] array */
@ -168,6 +171,26 @@ struct nxcon_state_s
/* Glyph cache data storage */
struct nxcon_glyph_s glyph[CONFIG_NXCONSOLE_CACHESIZE];
/* Keyboard input support */
#ifdef CONFIG_NXCONSOLE_NXKBDIN
sem_t waitsem; /* Supports waiting for input data */
uint8_t nwaiters; /* Number of threads waiting for data */
uint8_t head; /* rxbuffer head/input index */
uint8_t tail; /* rxbuffer tail/output index */
uint8_t rxbuffer[CONFIG_NXCONSOLE_KBDBUFSIZE];
/* The following is a list if poll structures of threads waiting for
* driver events. The 'struct pollfd' reference for each open is also
* retained in the f_priv field of the 'struct file'.
*/
#ifndef CONFIG_DISABLE_POLL
struct pollfd *fds[CONFIG_RAMLOG_NPOLLWAITERS];
#endif
#endif /* CONFIG_NXCONSOLE_NXKBDIN */
};
/****************************************************************************
@ -197,6 +220,13 @@ FAR struct nxcon_state_s *nxcon_register(NXCONSOLE handle,
FAR struct nxcon_window_s *wndo, FAR const struct nxcon_operations_s *ops,
int minor);
#ifdef CONFIG_NXCONSOLE_NXKBDIN
ssize_t nxcon_read(FAR struct file *filep, FAR char *buffer, size_t len);
#ifndef CONFIG_DISABLE_POLL
int nxcon_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup);
#endif
#endif
/* VT100 Terminal emulation */
enum nxcon_vt100state_e nxcon_vt100(FAR struct nxcon_state_s *priv, char ch);

470
graphics/nxconsole/nxcon_kbdin.c Normal file
View File

@ -0,0 +1,470 @@
/****************************************************************************
* nuttx/graphics/nxconsole/nxcon_kbdin.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <fcntl.h>
#include <sched.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include "nxcon_internal.h"
#ifdef CONFIG_NXCONSOLE_NXKBDIN
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxcon_pollnotify
****************************************************************************/
#ifndef CONFIG_DISABLE_POLL
static void nxcon_pollnotify(FAR struct nxcon_state_s *priv, pollevent_t eventset)
{
FAR struct pollfd *fds;
irqstate_t flags;
int i;
/* This function may be called from an interrupt handler */
for (i = 0; i < CONFIG_NXCONSOLE_NPOLLWAITERS; i++)
{
flags = irqsave();
fds = priv->fds[i];
if (fds)
{
fds->revents |= (fds->events & eventset);
if (fds->revents != 0)
{
sem_post(fds->sem);
}
}
irqrestore(flags);
}
}
#else
# define nxcon_pollnotify(priv,event)
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxcon_read
*
* Description:
* The optional NxConsole read method
*
****************************************************************************/
ssize_t nxcon_read(FAR struct file *filep, FAR char *buffer, size_t len)
{
FAR struct nxcon_state_s *priv;
ssize_t nread;
char ch;
int ret;
/* Recover our private state structure */
DEBUGASSERT(filep && filep->f_priv);
priv = (FAR struct nxcon_state_s *)filep->f_priv;
/* Get exclusive access to the driver structure */
ret = nxcon_semwait(priv);
if (ret < 0)
{
return ret;
}
/* Loop until something is read */
for (nread = 0; nread < len; )
{
/* Get the next byte from the buffer */
if (priv->head == priv->tail)
{
/* The circular buffer is empty. Did we read anything? */
if (nread > 0)
{
/* Yes.. break out to return what we have. */
break;
}
/* If the driver was opened with O_NONBLOCK option, then don't wait.
* Just return EGAIN.
*/
if (filep->f_oflags & O_NONBLOCK)
{
nread = -EAGAIN;
break;
}
/* Otherwise, wait for something to be written to the circular
* buffer. Increment the number of waiters so that the nxcon_write()
* will not that it needs to post the semaphore to wake us up.
*/
sched_lock();
priv->nwaiters++;
nxcon_sempost(priv);
/* We may now be pre-empted! But that should be okay because we
* have already incremented nwaiters. Pre-emption is disabled
* but will be re-enabled while we are waiting.
*/
ret = sem_wait(&priv->waitsem);
/* Pre-emption will be disabled when we return. So the decrementing
* nwaiters here is safe.
*/
priv->nwaiters--;
sched_unlock();
/* Did we successfully get the waitsem? */
if (ret >= 0)
{
/* Yes... then retake the mutual exclusion semaphore */
ret = nxcon_semwait(priv);
}
/* Was the semaphore wait successful? Did we successful re-take the
* mutual exclusion semaphore?
*/
if (ret < 0)
{
/* No.. One of the two sem_wait's failed. */
int errval = errno;
/* Were we awakened by a signal? Did we read anything before
* we received the signal?
*/
if (errval != EINTR || nread >= 0)
{
/* Yes.. return the error. */
nread = -errval;
}
/* Break out to return what we have. Note, we can't exactly
* "break" out because whichever error occurred, we do not hold
* the exclusion semaphore.
*/
goto errout_without_sem;
}
}
else
{
/* The circular buffer is not empty, get the next byte from the
* tail index.
*/
ch = priv->rxbuffer[priv->tail];
/* Increment the tail index and re-enable interrupts */
if (++priv->tail >= CONFIG_NXCONSOLE_KBDBUFSIZE)
{
priv->tail = 0;
}
/* Add the character to the user buffer */
buffer[nread] = ch;
nread++;
}
}
/* Relinquish the mutual exclusion semaphore */
sem_post(&priv->exclsem);
/* Notify all poll/select waiters that they can write to the FIFO */
errout_without_sem:
#ifndef CONFIG_DISABLE_POLL
if (nread > 0)
{
nxcon_pollnotify(priv, POLLOUT);
}
#endif
/* Return the number of characters actually read */
return nread;
}
/****************************************************************************
* Name: nxcon_poll
****************************************************************************/
#ifndef CONFIG_DISABLE_POLL
int nxcon_poll(FAR struct file *filep, FAR struct pollfd *fds, bool setup)
{
FAR struct inode *inode = filep->f_inode;
FAR struct nxcon_state_s *priv;
pollevent_t eventset;
int ndx;
int ret;
int i;
/* Some sanity checking */
DEBUGASSERT(inode && inode->i_private);
priv = inode->i_private;
/* Get exclusive access to the driver structure */
ret = nxcon_semwait(priv);
if (ret < 0)
{
return ret;
}
/* Are we setting up the poll? Or tearing it down? */
if (setup)
{
/* This is a request to set up the poll. Find an available
* slot for the poll structure reference
*/
for (i = 0; i < CONFIG_NXCONSOLE_NPOLLWAITERS; i++)
{
/* Find an available slot */
if (!priv->fds[i])
{
/* Bind the poll structure and this slot */
priv->fds[i] = fds;
fds->priv = &priv->fds[i];
break;
}
}
if (i >= CONFIG_NXCONSOLE_NPOLLWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
goto errout;
}
/* Should immediately notify on any of the requested events?
* This driver is always available for transmission.
*/
eventset = POLLOUT;
/* Check if the receive buffer is empty */
if (priv->head != priv->tail)
{
eventset |= POLLIN;
}
if (eventset)
{
nxcon_pollnotify(priv, eventset);
}
}
else if (fds->priv)
{
/* This is a request to tear down the poll. */
struct pollfd **slot = (struct pollfd **)fds->priv;
#ifdef CONFIG_DEBUG
if (!slot)
{
ret = -EIO;
goto errout;
}
#endif
/* Remove all memory of the poll setup */
*slot = NULL;
fds->priv = NULL;
}
errout:
nxcon_sempost(priv);
return ret;
}
#endif
/****************************************************************************
* Name: nxcon_kdbin
*
* Description:
* This function should be driven by the window kbdin callback function
* (see nx.h). When the NxConsole is the top window and keyboard input is
* received on the top window, that window callback should be directed to
* this function. This function will buffer the keyboard data and may
* it available to the NxConsole as stdin.
*
* If CONFIG_NXCONSOLE_NXKBDIN is not selected, then the NxConsole will
* receive its input from stdin (/dev/console). This works great but
* cannot be shared between different windows. Chaos will ensue if you
* try to support multiple NxConsole windows without CONFIG_NXCONSOLE_NXKBDIN
*
* Input Parameters:
* handle - A handle previously returned by nx_register, nxtk_register, or
* nxtool_register.
* buffer - The array of characters
* buflen - The number of characters that are available in buffer[]
*
* Returned Value:
* None
*
****************************************************************************/
void nxcon_kdbin(NXCONSOLE handle, FAR const uint8_t *buffer, uint8_t buflen)
{
FAR struct nxcon_state_s *priv;
ssize_t nwritten;
int nexthead;
char ch;
DEBUGASSERT(handle);
/* Get the reference to the driver structure from the handle */
priv = (FAR struct nxcon_state_s *)handle;
/* Loop until all of the bytes have been written. This function may be
* called from an interrupt handler! Semaphores cannot be used!
*
* The write logic only needs to modify the head index. Therefore,
* there is a difference in the way that head and tail are protected:
* tail is protected with a semaphore; tail is protected by disabling
* interrupts.
*/
for (nwritten = 0; nwritten < buflen; nwritten++)
{
/* Add the next character */
ch = buffer[nwritten];
/* Calculate the write index AFTER the next byte is add to the ring
* buffer
*/
nexthead = priv->head + 1;
if (nexthead >= CONFIG_NXCONSOLE_KBDBUFSIZE)
{
nexthead = 0;
}
/* Would the next write overflow the circular buffer? */
if (nexthead == priv->tail)
{
/* Yes... Return an indication that nothing was saved in the buffer. */
gdbg("ERROR: Keyboard data overrun\n");
break;
}
/* No... copy the byte */
priv->rxbuffer[priv->head] = ch;
priv->head = nexthead;
}
/* Was anything written? */
#ifndef CONFIG_DISABLE_POLL
if (nwritten > 0)
{
int i;
/* Are there threads waiting for read data? */
sched_lock();
for (i = 0; i < priv->nwaiters; i++)
{
/* Yes.. Notify all of the waiting readers that more data is available */
sem_post(&priv->waitsem);
}
/* Notify all poll/select waiters that they can write to the FIFO */
nxcon_pollnotify(priv, POLLIN);
sched_unlock();
}
#endif
nxcon_sempost(priv);
}
#endif /* CONFIG_NXCONSOLE_NXKBDIN */

3
graphics/nxconsole/nxcon_register.c
View File

@ -99,6 +99,9 @@ FAR struct nxcon_state_s *
memcpy(&priv->wndo, wndo, sizeof( struct nxcon_window_s));
sem_init(&priv->exclsem, 0, 1);
#ifdef CONFIG_NXCONSOLE_NXKBDIN
sem_init(&priv->waitsem, 0, 0);
#endif
/* Select the font */

3
graphics/nxconsole/nxcon_unregister.c
View File

@ -97,6 +97,9 @@ void nxcon_unregister(NXCONSOLE handle)
priv = (FAR struct nxcon_state_s *)handle;
sem_destroy(&priv->exclsem);
#ifdef CONFIG_NXCONSOLE_NXKBDIN
sem_destroy(&priv->waitsem);
#endif
/* Free all allocated glyph bitmap */

73
include/nuttx/nx/nxconsole.h
View File

@ -65,6 +65,9 @@
*
* CONFIG_NXCONSOLE
* Enables building of the NxConsole driver.
*
* Output text/graphics options:
*
* CONFIG_NXCONSOLE_BPP
* Currently, NxConsole supports only a single pixel depth. This
* configuration setting must be provided to support that single pixel depth.
@ -91,6 +94,21 @@
* By default, lines will wrap when the test reaches the right hand side
* of the window. This setting can be defining to change this behavior so
* that the text is simply truncated until a new line is encountered.
*
* Input options:
*
* CONFIG_NXCONSOLE_NXKBDIN
* Take input from the NX keyboard input callback. By default, keyboard
* input is taken from stdin (/dev/console). If this option is set, then
* the interface nxcon_kdbin() is enabled. That interface may be driven
* by window callback functions so that keyboard input *only* goes to the
* top window.
* CONFIG_NXCONSOLE_KBDBUFSIZE
* If CONFIG_NXCONSOLE_NXKBDIN is enabled, then this value may be used to
* define the size of the per-window keyboard input buffer. Default: 16
* CONFIG_NXCONSOLE_NPOLLWAITERS
* The number of threads that can be waiting for read data available.
* Default: 4
*/
/* Cursor character */
@ -141,6 +159,30 @@
# define CONFIG_NXCONSOLE_LINESEPARATION 0
#endif
/* Input options */
#ifndef CONFIG_NX_KBD
# undef CONFIG_NXCONSOLE_NXKBDIN
#endif
#ifdef CONFIG_NXCONSOLE_NXKBDIN
# ifndef CONFIG_NXCONSOLE_KBDBUFSIZE
# define CONFIG_NXCONSOLE_KBDBUFSIZE 16
# elif (CONFIG_NXCONSOLE_KBDBUFSIZE < 1) || (CONFIG_NXCONSOLE_KBDBUFSIZE > 255)
# error "CONFIG_NXCONSOLE_KBDBUFSIZE is out of range (1-255)"
# endif
# ifndef CONFIG_NXCONSOLE_NPOLLWAITERS
# define CONFIG_NXCONSOLE_NPOLLWAITERS 4
# endif
#else
# undef CONFIG_NXCONSOLE_KBDBUFSIZE
# define CONFIG_NXCONSOLE_KBDBUFSIZE 0
# define CONFIG_NXCONSOLE_NPOLLWAITERS 0
#endif
/****************************************************************************
* Public Types
****************************************************************************/
@ -285,6 +327,37 @@ EXTERN void nxcon_unregister(NXCONSOLE handle);
EXTERN void nxcon_redraw(NXCONSOLE handle, FAR const struct nxgl_rect_s *rect,
bool more);
/****************************************************************************
* Name: nxcon_kdbin
*
* Description:
* This function should be driven by the window kbdin callback function
* (see nx.h). When the NxConsole is the top window and keyboard input is
* received on the top window, that window callback should be directed to
* this function. This function will buffer the keyboard data and may
* it available to the NxConsole as stdin.
*
* If CONFIG_NXCONSOLE_NXKBDIN is not selected, then the NxConsole will
* receive its input from stdin (/dev/console). This works great but
* cannot be shared between different windows. Chaos will ensue if you
* try to support multiple NxConsole windows without CONFIG_NXCONSOLE_NXKBDIN
*
* Input Parameters:
* handle - A handle previously returned by nx_register, nxtk_register, or
* nxtool_register.
* buffer - The array of characters
* buflen - The number of characters that are available in buffer[]
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NXCONSOLE_NXKBDIN
EXTERN void nxcon_kdbin(NXCONSOLE handle, FAR const uint8_t *buffer,
uint8_t buflen);
#endif
#undef EXTERN
#if defined(__cplusplus)
}