forked from Archive/PX4-Autopilot
139 lines
4.6 KiB
C
139 lines
4.6 KiB
C
/****************************************************************************
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* examples/keypadtest/keypadtest_main.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <errno.h>
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#include <nuttx/input/keypad.h>
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Sanity checking */
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/* Provide some default values for other configuration settings */
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#ifndef CONFIG_EXAMPLES_KEYPAD_DEVNAME
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# define CONFIG_EXAMPLES_KEYPAD_DEVNAME "/dev/keypad"
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: keypadtest_main
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****************************************************************************/
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int keypadtest_main(int argc, char *argv[])
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{
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char buffer[256];
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ssize_t nbytes;
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int fd;
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int ret;
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/* First, register the keyboard device(s) */
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printf("keypadtest_main: Register keyboard device\n");
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ret = keypad_kbdinit();
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if (ret != OK)
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{
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printf("keypadtest_main: Failed to register the KBD class\n");
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fflush(stdout);
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return 1;
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}
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/* Open the configured keyboard device. */
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printf("keypadtest_main: Opening device %s\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME);
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fd = open(CONFIG_EXAMPLES_KEYPAD_DEVNAME, O_RDONLY);
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if (fd < 0)
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{
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printf("keypadtest_main: open() failed: %d\n", errno);
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fflush(stdout);
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return 1;
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}
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printf("keypadtest_main: Device %s opened\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME);
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fflush(stdout);
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/* Loop until there is a read failure */
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do
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{
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/* Read a buffer of data */
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nbytes = read(fd, buffer, 256);
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if (nbytes > 0)
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{
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/* On success, echo the buffer to stdout */
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(void)write(1, buffer, nbytes);
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}
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}
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while (nbytes >= 0);
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printf("keypadtest_main: Closing device %s: %d\n", CONFIG_EXAMPLES_KEYPAD_DEVNAME, (int)nbytes);
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fflush(stdout);
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close(fd);
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return 0;
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}
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