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/****************************************************************************
* examples/keypadtest/keypadtest_main.c
*
* Copyright (C) 2011 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 Gregory Nutt 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 <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sched.h>
#include <errno.h>
#include <nuttx/input/keypad.h>
#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
# include <nuttx/streams.h>
# include <nuttx/input/kbd_codec.h>
#endif
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Sanity checking */
/* Provide some default values for other configuration settings */
#ifndef CONFIG_EXAMPLES_KEYPAD_DEVNAME
# define CONFIG_EXAMPLES_KEYPAD_DEVNAME "/dev/keypad"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
struct keypad_instream_s
{
struct lib_instream_s stream;
FAR char *buffer;
ssize_t nbytes;
};
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: keypad_getstream
*
* Description:
* Get one character from the keyboard.
*
****************************************************************************/
#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
static int keypad_getstream(FAR struct lib_instream_s *this)
{
FAR struct keypad_instream_s *kbdstream = (FAR struct keypad_instream_s *)this;
DEBUGASSERT(kbdstream && kbdstream->buffer);
if (kbdstream->nbytes > 0)
{
kbdstream->nbytes--;
kbdstream->stream.nget++;
return (int)*kbdstream->buffer++;
}
return EOF;
}
#endif
/****************************************************************************
* Name: keypad_decode
*
* Description:
* Decode encoded keyboard input
*
****************************************************************************/
#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
static void keypad_decode(FAR char *buffer, ssize_t nbytes)
{
struct keypad_instream_s kbdstream;
struct kbd_getstate_s state;
uint8_t ch;
int ret;
/* Initialize */
memset(&state, 0, sizeof(struct kbd_getstate_s));
kbdstream.stream.get = keypad_getstream;
kbdstream.stream.nget = 0;
kbdstream.buffer = buffer;
kbdstream.nbytes = nbytes;
/* Loop until all of the bytes have been consumed. We implicitly assume
* that the the escaped sequences do not cross buffer boundaries. That
* might be true if the read buffer were small or the data rates high.
*/
for (;;)
{
/* Decode the next thing from the buffer */
ret = kbd_decode((FAR struct lib_instream_s *)&kbdstream, &state, &ch);
if (ret == KBD_ERROR)
{
break;
}
/* Normal data? Or special key? */
switch (ret)
{
case KBD_PRESS: /* Key press event */
printf("Normal Press: %c [%02x]\n", isprint(ch) ? ch : '.', ch);
break;
case KBD_RELEASE: /* Key release event */
printf("Normal Release: %c [%02x]\n", isprint(ch) ? ch : '.', ch);
break;
case KBD_SPECPRESS: /* Special key press event */
printf("Special Press: %d\n", ch);
break;
case KBD_SPECREL: /* Special key release event */
printf("Special Release: %d\n", ch);
break;
case KBD_ERROR: /* Error or end-of-file */
printf("EOF: %d\n", ret);
break;
default:
printf("Unexpected: %d\n", ret);
break;
}
}
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: keypadtest_main
****************************************************************************/
int keypadtest_main(int argc, char *argv[])
{
char buffer[256];
ssize_t nbytes;
int fd;
int ret;
/* First, register the keyboard device(s) */
printf("keypadtest_main: Register keyboard device\n");
ret = keypad_kbdinit();
if (ret != OK)
{
printf("keypadtest_main: Failed to register the KBD class\n");
fflush(stdout);
return 1;
}
/* Open the configured keyboard device. */
printf("keypadtest_main: Opening device %s\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME);
fd = open(CONFIG_EXAMPLES_KEYPAD_DEVNAME, O_RDONLY);
if (fd < 0)
{
printf("keypadtest_main: open() failed: %d\n", errno);
fflush(stdout);
return 1;
}
printf("keypadtest_main: Device %s opened\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME);
fflush(stdout);
/* Loop until there is a read failure */
do
{
/* Read a buffer of data */
nbytes = read(fd, buffer, 256);
if (nbytes > 0)
{
/* On success, echo the buffer to stdout */
#ifdef CONFIG_EXAMPLES_KEYPADTEST_ENCODED
keypad_decode(buffer, nbytes);
#else
(void)write(1, buffer, nbytes);
#endif
}
}
while (nbytes >= 0);
printf("keypadtest_main: Closing device %s: %d\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME, (int)nbytes);
fflush(stdout);
close(fd);
return 0;
}
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