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/****************************************************************************
* examples/examples/adc/adc.h
*
* Copyright (C) 2011 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_ADC_ADC_H
#define __APPS_EXAMPLES_ADC_ADC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* CONFIG_NSH_BUILTIN_APPS - Build the ADC test as an NSH built-in function.
* Default: Built as a standalone problem
* CONFIG_EXAMPLES_ADC_DEVPATH - The default path to the ADC device. Default: /dev/adc0
* CONFIG_EXAMPLES_ADC_NSAMPLES - If CONFIG_NSH_BUILTIN_APPS
* is defined, then the number of samples is provided on the command line
* and this value is ignored. Otherwise, this number of samples is
* collected and the program terminates. Default: Samples are collected
* indefinitely.
* CONFIG_EXAMPLES_ADC_GROUPSIZE - The number of samples to read at once.
* Default: 4
*/
#ifndef CONFIG_ADC
# error "ADC device support is not enabled (CONFIG_ADC)"
#endif
#ifndef CONFIG_EXAMPLES_ADC_DEVPATH
# define CONFIG_EXAMPLES_ADC_DEVPATH "/dev/adc0"
#endif
#ifndef CONFIG_EXAMPLES_ADC_GROUPSIZE
# define CONFIG_EXAMPLES_ADC_GROUPSIZE 4
#endif
/* Debug ********************************************************************/
#ifdef CONFIG_CPP_HAVE_VARARGS
# ifdef CONFIG_DEBUG
# define message(...) syslog(__VA_ARGS__)
# define msgflush()
# else
# define message(...) printf(__VA_ARGS__)
# define msgflush() fflush(stdout)
# endif
#else
# ifdef CONFIG_DEBUG
# define message syslog
# define msgflush()
# else
# define message printf
# define msgflush() fflush(stdout)
# endif
#endif
/****************************************************************************
* Public Types
****************************************************************************/
struct adc_state_s
{
bool initialized;
FAR char *devpath;
#if defined(CONFIG_NSH_BUILTIN_APPS) || defined(CONFIG_EXAMPLES_ADC_NSAMPLES)
int count;
#endif
};
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: adc_devinit()
*
* Description:
* Perform architecuture-specific initialization of the ADC hardware. This
* interface must be provided by all configurations using apps/examples/adc
*
****************************************************************************/
int adc_devinit(void);
#endif /* __APPS_EXAMPLES_ADC_ADC_H */
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