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208 lines
6.9 KiB
208 lines
6.9 KiB
/**************************************************************************** |
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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 <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 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: tc_main |
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****************************************************************************/ |
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int tc_main(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("tc_main: nsamples: %d\n", nsamples); |
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#elif defined(CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES) |
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message("tc_main: 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("tc_main: 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("tc_main: 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("tc_main: 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("tc_main: 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("tc_main: 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("tc_main: 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("tc_main: 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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