diff options
Diffstat (limited to 'nuttx/graphics/nxconsole/nxcon_driver.c')
| -rwxr-xr-x | nuttx/graphics/nxconsole/nxcon_driver.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/nuttx/graphics/nxconsole/nxcon_driver.c b/nuttx/graphics/nxconsole/nxcon_driver.c new file mode 100755 index 000000000..c647f97bb --- /dev/null +++ b/nuttx/graphics/nxconsole/nxcon_driver.c @@ -0,0 +1,257 @@ +/**************************************************************************** + * nuttx/graphics/nxconsole/nxcon_driver.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 <sys/types.h> +#include <stdbool.h> +#include <string.h> +#include <fcntl.h> +#include <assert.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/fs/fs.h> + +#include "nxcon_internal.h" + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static int nxcon_open(FAR struct file *filep); +static ssize_t nxcon_write(FAR struct file *filep, FAR const char *buffer, + size_t buflen); + +/**************************************************************************** + * Public Data + ****************************************************************************/ +/* 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 */ + 0, /* close */ + 0, /* read */ + nxcon_write, /* write */ + 0, /* seek */ + 0 /* ioctl */ +#ifndef CONFIG_DISABLE_POLL + , + 0 /* poll */ +#endif +}; + +#endif /* CONFIG_NXCONSOLE_NXKBDIN */ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxcon_open + ****************************************************************************/ + +static int nxcon_open(FAR struct file *filep) +{ + FAR struct inode *inode = filep->f_inode; + FAR struct nxcon_state_s *priv = inode->i_private; + + DEBUGASSERT(filep && filep->f_inode); + + /* Get the driver structure from the inode */ + + inode = filep->f_inode; + priv = (FAR struct nxcon_state_s *)inode->i_private; + DEBUGASSERT(priv); + + /* Verify that the driver is opened for write-only access */ + +#ifndef CONFIG_NXCONSOLE_NXKBDIN + if ((filep->f_oflags & O_RDOK) != 0) + { + gdbg("ERROR: Attempted open with read access\n"); + return -EACCES; + } +#endif + + /* Assign the driver structure to the file */ + + filep->f_priv = priv; + return OK; +} + +/**************************************************************************** + * Name: nxcon_write + ****************************************************************************/ + +static ssize_t nxcon_write(FAR struct file *filep, FAR const char *buffer, + size_t buflen) +{ + FAR struct nxcon_state_s *priv; + enum nxcon_vt100state_e state; + ssize_t remaining; + 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 */ + + ret = nxcon_semwait(priv); + if (ret < 0) + { + return ret; + } + + /* Hide the cursor while we update the display */ + + nxcon_hidecursor(priv); + + /* Loop writing each character to the display */ + + for (remaining = (ssize_t)buflen; remaining > 0; remaining--) + { + /* Get the next character from the user buffer */ + + ch = *buffer++; + + /* Check if this character is part of a VT100 escape sequence */ + + do + { + /* Is the character part of a VT100 escape sequnce? */ + + state = nxcon_vt100(priv, ch); + switch (state) + { + /* Character is not part of a VT100 escape sequence (and no + * characters are buffer. + */ + + default: + case VT100_NOT_CONSUMED: + { + /* We can output the character to the window */ + + nxcon_putc(priv, (uint8_t)ch); + } + break; + + /* The full VT100 escape sequence was processed (and the new + * character was consumed) + */ + + case VT100_PROCESSED: + + /* Character was consumed as part of the VT100 escape processing + * (but the escape sequence is still incomplete. + */ + + case VT100_CONSUMED: + { + /* Do nothing... the VT100 logic owns the character */ + } + break; + + /* Invalid/unsupported character in escape sequence */ + + case VT100_ABORT: + { + int i; + + /* Add the first unhandled character to the window */ + + nxcon_putc(priv, (uint8_t)priv->seq[0]); + + /* Move all buffer characters down one */ + + for (i = 1; i < priv->nseq; i++) + { + priv->seq[i-1] = priv->seq[i]; + } + priv->nseq--; + + /* Then loop again and check if what remains is part of a + * VT100 escape sequence. We could speed this up by + * checking if priv->seq[0] == ASCII_ESC. + */ + } + break; + } + } + while (state == VT100_ABORT); + } + + /* Show the cursor at its new position */ + + nxcon_showcursor(priv); + nxcon_sempost(priv); + return (ssize_t)buflen; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + |