forked from Archive/PX4-Autopilot
217 lines
7.2 KiB
C
217 lines
7.2 KiB
C
/****************************************************************************
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* examples/touchscreen/tc_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 <spudmonkey@racsa.co.cr>
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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 NuttX 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 <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/input/touchscreen.h>
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#include "tc.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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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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* Public 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: user_start/nxhello_main
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****************************************************************************/
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#ifdef CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN
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# define MAIN_NAME tc_main
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# define MAIN_STRING "tc_main: "
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#else
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# define MAIN_NAME user_start
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# define MAIN_STRING "user_start: "
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#endif
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int MAIN_NAME(int argc, char *argv[])
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{
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struct touch_sample_s sample;
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ssize_t nbytes;
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#if defined(CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN) || defined(CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES)
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long nsamples;
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#endif
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int fd;
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int errval = 0;
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int ret;
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/* If this example is configured as an NX add-on, then limit the number of
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* samples that we collect before returning. Otherwise, we never return
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*/
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#if defined(CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN)
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nsamples = 1;
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if (argc > 1)
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{
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nsamples = strtol(argv[1], NULL, 10);
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}
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message(MAIN_STRING "nsamples: %d\n", nsamples);
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#elif defined(CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES)
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message(MAIN_STRING "nsamples: %d\n", CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES);
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#endif
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/* Initialization of the touchscreen hardware is performed by logic
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* external to this test.
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*/
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message(MAIN_STRING "Initializing external touchscreen device\n");
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ret = arch_tcinitialize(CONFIG_EXAMPLES_TOUCHSCREEN_MINOR);
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if (ret != OK)
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{
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message(MAIN_STRING "arch_tcinitialize failed: %d\n", ret);
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errval = 1;
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goto errout;
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}
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/* Open the touchscreen device for reading */
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message(MAIN_STRING "Opening %s\n", CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH);
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fd = open(CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, O_RDONLY);
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if (fd < 0)
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{
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message(MAIN_STRING "open %s failed: %d\n",
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CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, errno);
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errval = 2;
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goto errout_with_tc;
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}
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/* Now loop the appropriate number of times, displaying the collected
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* touchscreen samples.
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*/
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#if defined(CONFIG_EXAMPLES_TOUCHSCREEN_BUILTIN)
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for (; nsamples > 0; nsamples--)
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#elif defined(CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES)
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for (nsamples = 0; nsamples < CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES; nsamples++)
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#else
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for (;;)
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#endif
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{
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/* Flush any output before the loop entered or from the previous pass
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* through the loop.
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*/
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msgflush();
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/* Read one sample */
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ivdbg("Reading...\n");
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nbytes = read(fd, &sample, sizeof(struct touch_sample_s));
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ivdbg("Bytes read: %d\n", nbytes);
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/* Handle unexpected return values */
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if (nbytes < 0)
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{
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errval = errno;
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if (errval != EINTR)
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{
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message(MAIN_STRING "read %s failed: %d\n",
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CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH, errval);
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errval = 3;
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goto errout_with_dev;
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}
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message(MAIN_STRING "Interrupted read...\n");
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}
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else if (nbytes != sizeof(struct touch_sample_s))
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{
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message(MAIN_STRING "Unexpected read size=%d, expected=%d, Ignoring\n",
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nbytes, sizeof(struct touch_sample_s));
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}
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/* Print the sample data on successful return */
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else
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{
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message("Sample :\n");
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message(" npoints : %d\n", sample.npoints);
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message("Point 1 :\n");
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message(" id : %d\n", sample.point[0].id);
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message(" flags : %02x\n", sample.point[0].flags);
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message(" x : %d\n", sample.point[0].x);
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message(" y : %d\n", sample.point[0].y);
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message(" h : %d\n", sample.point[0].h);
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message(" w : %d\n", sample.point[0].w);
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message(" pressure : %d\n", sample.point[0].pressure);
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}
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}
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errout_with_dev:
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close(fd);
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errout_with_tc:
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arch_tcuninitialize();
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errout:
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message("Terminating!\n");
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msgflush();
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return errval;
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}
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