108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/****************************************************************************
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* examples/pca9635/pca9635_main.c
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*
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* Copyright (C) 2015 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/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <nuttx/leds/pca9635pw.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define CONFIG_EXAMPLES_PCA9635_DEVNAME "/dev/leddrv0"
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/****************************************************************************
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* Private Data
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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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* pca9635_main
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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struct pca9635pw_setled_brightness_arg_s ledbright;
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int led;
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int bright;
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int fd;
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int ret;
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fd = open(CONFIG_EXAMPLES_PCA9635_DEVNAME, O_RDONLY);
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if (fd < 0)
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{
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fprintf(stderr, "ERROR: Failed to open %s: %d\n",
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CONFIG_EXAMPLES_PCA9635_DEVNAME, errno);
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return -1;
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}
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for (; ; )
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{
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for (bright = 0; bright <= 255; bright++)
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{
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for (led = LED_0; led <= LED_15; led++)
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{
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ledbright.led = led;
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ledbright.brightness = bright;
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ret = ioctl(fd, PWMIOC_SETLED_BRIGHTNESS, (unsigned long)&ledbright);
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if (ret < 0)
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{
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_err("ERROR: ioctl(PWMIOC_SETLED_BRIGHTNESS) failed: %d\n", errno);
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}
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}
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usleep(100);
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}
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}
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close(fd);
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return 0;
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}
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