149 lines
5.0 KiB
C
149 lines
5.0 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file i2s.h
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* @brief I2S Driver macros and structures.
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*
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* @addtogroup I2S
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* @{
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*/
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#ifndef _I2S_H_
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#define _I2S_H_
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#if HAL_USE_I2S || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @name I2S modes
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* @{
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*/
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#define I2S_MODE_SLAVE 0
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#define I2S_MODE_MASTER 1
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#define I2S_MODE_TX 2
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#define I2S_MODE_RX 4
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#define I2S_MODE_TXRX (I2S_MODE_TX | I2S_MODE_RX)
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/** @} */
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Driver state machine possible states.
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*/
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typedef enum {
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I2S_UNINIT = 0, /**< Not initialized. */
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I2S_STOP = 1, /**< Stopped. */
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I2S_READY = 2, /**< Ready. */
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I2S_ACTIVE = 3, /**< Active. */
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I2S_COMPLETE = 4 /**< Transmission complete. */
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} i2sstate_t;
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/**
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* @brief Type of a structure representing a I2S driver.
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*/
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typedef struct I2SDriver I2SDriver;
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#include "i2s_lld.h"
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @name Macro Functions
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* @{
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*/
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/**
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* @brief Starts a I2S data exchange.
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*
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* @param[in] i2sp pointer to the @p I2SDriver object
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*
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* @iclass
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*/
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#define i2sStartExchangeI(i2sp) { \
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i2s_lld_start_exchange(i2sp); \
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(i2sp)->state = I2S_ACTIVE; \
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}
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/**
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* @brief Starts a I2S data exchange in continuous mode.
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*
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* @param[in] i2sp pointer to the @p I2SDriver object
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*
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* @iclass
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*/
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#define i2sStartExchangeContinuousI(i2sp) { \
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i2s_lld_start_exchange_continuous(i2sp); \
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(i2sp)->state = I2S_ACTIVE; \
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}
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/**
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* @brief Stops the ongoing data exchange.
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* @details The ongoing data exchange, if any, is stopped, if the driver
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* was not active the function does nothing.
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*
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* @param[in] i2sp pointer to the @p I2SDriver object
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*
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* @iclass
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*/
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#define i2sStopExchangeI(i2sp) { \
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i2s_lld_stop_exchange(i2sp); \
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(i2sp)->state = I2S_READY; \
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}
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void i2sInit(void);
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void i2sObjectInit(I2SDriver *i2sp);
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void i2sStart(I2SDriver *i2sp, const I2SConfig *config);
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void i2sStop(I2SDriver *i2sp);
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void i2sStartExchange(I2SDriver *i2sp);
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void i2sStopExchange(I2SDriver *i2sp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_I2S */
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#endif /* _I2S_H_ */
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/** @} */
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