forked from Archive/PX4-Autopilot
135 lines
5.1 KiB
C
135 lines
5.1 KiB
C
|
/****************************************************************************
|
||
|
|
* examples/examples/pwm/pwm.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011-2012 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 NuttX 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.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#ifndef __APPS_EXAMPLES_PWM_PWM_H
|
||
|
|
#define __APPS_EXAMPLES_PWM_PWM_H
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Included Files
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <nuttx/config.h>
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Definitions
|
||
|
|
****************************************************************************/
|
||
|
|
/* Configuration ************************************************************/
|
||
|
|
/* CONFIG_NSH_BUILTIN_APPS - Build the PWM test as an NSH built-in function.
|
||
|
|
* Default: Not built! The example can only be used as an NSH built-in
|
||
|
|
* application
|
||
|
|
* CONFIG_EXAMPLES_PWM_DEVPATH - The path to the PWM device. Default: /dev/pwm0
|
||
|
|
* CONFIG_EXAMPLES_PWM_FREQUENCY - The initial PWM frequency. Default: 100 Hz
|
||
|
|
* CONFIG_EXAMPLES_PWM_DUTYPCT - The initial PWM duty as a percentage. Default: 50%
|
||
|
|
* CONFIG_EXAMPLES_PWM_DURATION - The initial PWM pulse train duration in seconds.
|
||
|
|
* Used only if the current pulse count is zero (pulse count is only supported
|
||
|
|
* if CONFIG_PWM_PULSECOUNT is defined). Default: 5 seconds
|
||
|
|
* CONFIG_EXAMPLES_PWM_PULSECOUNT - The initial PWM pulse count. This option is
|
||
|
|
* only available if CONFIG_PWM_PULSECOUNT is defined. Default: 0 (i.e., use
|
||
|
|
* the duration, not the count).
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef CONFIG_PWM
|
||
|
|
# error "PWM device support is not enabled (CONFIG_PWM)"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_NSH_BUILTIN_APPS
|
||
|
|
# warning "The PWM example only works as an NSH built-in application (CONFIG_NSH_BUILTIN_APPS)"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_EXAMPLES_PWM_DEVPATH
|
||
|
|
# define CONFIG_EXAMPLES_PWM_DEVPATH "/dev/pwm0"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_EXAMPLES_PWM_FREQUENCY
|
||
|
|
# define CONFIG_EXAMPLES_PWM_FREQUENCY 100
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_EXAMPLES_PWM_DUTYPCT
|
||
|
|
# define CONFIG_EXAMPLES_PWM_DUTYPCT 50
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_EXAMPLES_PWM_DURATION
|
||
|
|
# define CONFIG_EXAMPLES_PWM_DURATION 5
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef CONFIG_EXAMPLES_PWM_COUNT
|
||
|
|
# define CONFIG_EXAMPLES_PWM_COUNT 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Debug ********************************************************************/
|
||
|
|
|
||
|
|
#ifdef CONFIG_CPP_HAVE_VARARGS
|
||
|
|
# ifdef CONFIG_DEBUG
|
||
|
|
# define message(...) lib_rawprintf(__VA_ARGS__)
|
||
|
|
# define msgflush()
|
||
|
|
# else
|
||
|
|
# define message(...) printf(__VA_ARGS__)
|
||
|
|
# define msgflush() fflush(stdout)
|
||
|
|
# endif
|
||
|
|
#else
|
||
|
|
# ifdef CONFIG_DEBUG
|
||
|
|
# define message lib_rawprintf
|
||
|
|
# define msgflush()
|
||
|
|
# else
|
||
|
|
# define message printf
|
||
|
|
# define msgflush() fflush(stdout)
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Types
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Variables
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Function Prototypes
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: pwm_devinit()
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Perform architecuture-specific initialization of the PWM hardware. This
|
||
|
|
* interface must be provided by all configurations using apps/examples/pwm
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
int pwm_devinit(void);
|
||
|
|
|
||
|
|
#endif /* __APPS_EXAMPLES_PWM_PWM_H */
|