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/****************************************************************************
* examples/examples/i2schar/i2schar.h
*
* Copyright (C) 2013 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_I2SCHAR_I2SCHAR_H
#define __APPS_EXAMPLES_I2SCHAR_I2SCHAR_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* CONFIG_NSH_BUILTIN_APPS - Build the I2SCHAR test as an NSH built-in
* function. Default: Built as a standalone problem
* CONFIG_EXAMPLES_I2SCHAR_DEVPATH - The default path to the I2S character
* device. Default: /dev/i2schar0
*/
#ifndef CONFIG_AUDIO_I2SCHAR
# error "I2S character device support is not enabled (CONFIG_AUDIO_I2SCHAR)"
#endif
#ifndef CONFIG_EXAMPLES_I2SCHAR_DEVPATH
# define CONFIG_EXAMPLES_I2SCHAR_DEVPATH "/dev/is2char0"
#endif
#ifdef CONFIG_EXAMPLES_I2SCHAR_TX
# ifndef CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS
# define CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS 4
# endif
# ifndef CONFIG_EXAMPLES_I2SCHAR_TXSTACKSIZE
# define CONFIG_EXAMPLES_I2SCHAR_TXSTACKSIZE 1536
# endif
#else
# undef CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS
# define CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS 0
#endif
#ifdef CONFIG_EXAMPLES_I2SCHAR_RX
# ifndef CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS
# define CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS 4
# endif
# ifndef CONFIG_EXAMPLES_I2SCHAR_RXSTACKSIZE
# define CONFIG_EXAMPLES_I2SCHAR_RXSTACKSIZE 1536
# endif
#else
# undef CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS
# define CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS 0
#endif
#ifndef CONFIG_EXAMPLES_I2SCHAR_BUFSIZE
# efine CONFIG_EXAMPLES_I2SCHAR_BUFSIZE 256
#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 i2schar_state_s
{
bool initialized;
FAR char *devpath;
#ifdef CONFIG_EXAMPLES_I2SCHAR_TX
int txcount;
#endif
#ifdef CONFIG_EXAMPLES_I2SCHAR_RX
int rxcount;
#endif
};
/****************************************************************************
* Public Variables
****************************************************************************/
extern struct i2schar_state_s g_i2schar;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: i2schar_devinit()
*
* Description:
* Perform architecuture-specific initialization of the I2s hardware and
* registration of the I2S character driver CHAR hardware. If
* CONFIG_EXAMPLES_I2SCHAR_DEVINIT is defined, then board-specific logic
* must provide this function.
*
****************************************************************************/
#ifdef CONFIG_EXAMPLES_I2SCHAR_DEVINIT
int i2schar_devinit(void);
#endif
/****************************************************************************
* Name: i2schar_transmitter()
*
* Description:
* This is the entry point for the transmitter thread.
*
****************************************************************************/
#ifdef CONFIG_EXAMPLES_I2SCHAR_TX
pthread_addr_t i2schar_transmitter(pthread_addr_t arg);
#endif
/****************************************************************************
* Name: i2schar_receiver()
*
* Description:
* This is the entry point for the receiver thread.
*
****************************************************************************/
#ifdef CONFIG_EXAMPLES_I2SCHAR_RX
pthread_addr_t i2schar_receiver(pthread_addr_t arg);
#endif
#endif /* __APPS_EXAMPLES_I2SCHAR_I2SCHAR_H */
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