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/*
ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file i2s_lld.c
* @brief PLATFORM I2S subsystem low level driver source.
*
* @addtogroup I2S
* @{
*/
#include "hal.h"
#if HAL_USE_I2S || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/** @brief I2S2 driver identifier.*/
#if PLATFORM_I2S_USE_I2S1 || defined(__DOXYGEN__)
I2SDriver I2SD1;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level I2S driver initialization.
*
* @notapi
*/
void i2s_lld_init(void) {
#if PLATFORM_I2S_USE_I2S1
i2sObjectInit(&I2SD1);
#endif
}
/**
* @brief Configures and activates the I2S peripheral.
*
* @param[in] i2sp pointer to the @p I2SDriver object
*
* @notapi
*/
void i2s_lld_start(I2SDriver *i2sp) {
/* If in stopped state then enables the SPI and DMA clocks.*/
if (i2sp->state == I2S_STOP) {
#if PLATFORM_I2S_USE_I2S1
if (&I2SD1 == i2sp) {
}
#endif
}
/**
* @brief Deactivates the I2S peripheral.
*
* @param[in] i2sp pointer to the @p I2SDriver object
*
* @notapi
*/
void i2s_lld_stop(I2SDriver *i2sp) {
/* If in ready state then disables the SPI clock.*/
if (i2sp->state == I2S_READY) {
#if PLATFORM_I2S_USE_I2S1
if (&I2SD1 == i2sp) {
}
#endif
}
}
/**
* @brief Starts a I2S data exchange.
*
* @param[in] i2sp pointer to the @p I2SDriver object
*
* @notapi
*/
void i2s_lld_start_exchange(I2SDriver *i2sp) {
(void)i2sp;
}
/**
* @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
*
* @notapi
*/
void i2s_lld_stop_exchange(I2SDriver *i2sp) {
(void)i2sp;
}
#endif /* HAL_USE_I2S */
/** @} */
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