149 lines
4.9 KiB
C
149 lines
4.9 KiB
C
/*
|
|
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. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @name I2S modes
|
|
* @{
|
|
*/
|
|
#define I2S_MODE_SLAVE 0
|
|
#define I2S_MODE_MASTER 1
|
|
#define I2S_MODE_TX 2
|
|
#define I2S_MODE_RX 4
|
|
#define I2S_MODE_TXRX (I2S_MODE_TX | I2S_MODE_RX)
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* 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 data exchange.
|
|
*
|
|
* @param[in] i2sp pointer to the @p I2SDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define i2sStartExchangeI(i2sp) { \
|
|
i2s_lld_start_exchange(i2sp); \
|
|
(i2sp)->state = I2S_ACTIVE; \
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a I2S data exchange in continuous mode.
|
|
*
|
|
* @param[in] i2sp pointer to the @p I2SDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define i2sStartExchangeContinuousI(i2sp) { \
|
|
i2s_lld_start_exchange_continuous(i2sp); \
|
|
(i2sp)->state = I2S_ACTIVE; \
|
|
}
|
|
|
|
/**
|
|
* @brief Stops the ongoing data exchange.
|
|
* @details The ongoing data exchange, if any, is stopped, if the driver
|
|
* was not active the function does nothing.
|
|
*
|
|
* @param[in] i2sp pointer to the @p I2SDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define i2sStopExchangeI(i2sp) { \
|
|
i2s_lld_stop_exchange(i2sp); \
|
|
(i2sp)->state = I2S_READY; \
|
|
}
|
|
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* 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 i2sStartExchange(I2SDriver *i2sp);
|
|
void i2sStopExchange(I2SDriver *i2sp);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_I2S */
|
|
|
|
#endif /* _I2S_H_ */
|
|
|
|
/** @} */
|