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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file i2s.h
* @brief I2S Driver macros and structures.
*
* @addtogroup I2S
* @{
*/
#ifndef _I2S_H_
#define _I2S_H_
#if HAL_USE_I2S || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
I2S_UNINIT = 0, /**< Not initialized. */
I2S_STOP = 1, /**< Stopped. */
I2S_READY = 2, /**< Ready. */
I2S_ACTIVE = 3, /**< Active. */
I2S_COMPLETE = 4 /**< Transmission complete. */
} i2sstate_t;
/**
* @brief Type of a structure representing a I2S driver.
*/
typedef struct I2SDriver I2SDriver;
#include "i2s_lld.h"
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @name Macro Functions
* @{
*/
/**
* @brief Starts a I2S transmission.
* @details The transmission is started and it is executes until the specified
* buffer has entirely transmitted.
* @post A callback is invoked when the buffer has been fully transmitted.
*
* @param[in] i2sp pointer to the @p I2SDriver object
* @param[in] n number of samples to send
* @param[in] txbuf the pointer to the transmit buffer
*
* @iclass
*/
#define i2sStartSendOnceI(i2sp, n, txbuf) \
i2s_lld_start_send_once(i2sp, n, txbuf)
/**
* @brief Starts a continuous I2S transmission.
* @details The transmission is started and it is executes continuously
* until @p i2sStopSend() has been explicitly invoked .
* @post A callback is invoked when the buffer has been half transmitted
* and fully transmitted.
*
* @param[in] i2sp pointer to the @p I2SDriver object
* @param[in] n number of samples to send
* @param[in] txbuf the pointer to the transmit buffer
*
* @api
*/
#define i2sStartSendContinuousI(i2sp, n, txbuf) \
i2s_lld_start_send_continuous(i2sp, n, txbuf)
/**
* @brief Stops the ongoing transmission.
* @details The ongoing transmission, if any, is stopped, if the driver
* was not transmitting the function does nothing.
*
* @param[in] i2sp pointer to the @p I2SDriver object
*
* @iclass
*/
#define i2sStopSendI(i2sp) \
i2s_lld_stop_send(i2sp)
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void i2sInit(void);
void i2sObjectInit(I2SDriver *i2sp);
void i2sStart(I2SDriver *i2sp, const I2SConfig *config);
void i2sStop(I2SDriver *i2sp);
void i2sStartSendOnce(I2SDriver *i2sp,
size_t n,
const i2ssample_t *txbuf);
void i2sStartSendContinuous(I2SDriver *i2sp,
size_t n,
const i2ssample_t *txbuf);
void i2sStopSend(I2SDriver *i2sp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_I2S */
#endif /* _I2S_H_ */
/** @} */
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