144 lines
4.5 KiB
C
144 lines
4.5 KiB
C
/*
|
|
ChibiOS - Copyright (C) 2006..2016 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 hal_i2s_lld.h
|
|
* @brief PLATFORM I2S subsystem low level driver header.
|
|
*
|
|
* @addtogroup I2S
|
|
* @{
|
|
*/
|
|
|
|
#ifndef HAL_I2S_LLD_H
|
|
#define HAL_I2S_LLD_H
|
|
|
|
#if (HAL_USE_I2S == TRUE) || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @name PLATFORM configuration options
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief I2SD1 driver enable switch.
|
|
* @details If set to @p TRUE the support for I2S1 is included.
|
|
* @note The default is @p FALSE.
|
|
*/
|
|
#if !defined(PLATFORM_I2S_USE_I2S1) || defined(__DOXYGEN__)
|
|
#define PLATFORM_I2S_USE_I2S1 FALSE
|
|
#endif
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Type of a structure representing an I2S driver.
|
|
*/
|
|
typedef struct I2SDriver I2SDriver;
|
|
|
|
/**
|
|
* @brief I2S notification callback type.
|
|
*
|
|
* @param[in] i2sp pointer to the @p I2SDriver object
|
|
* @param[in] offset offset in buffers of the data to read/write
|
|
* @param[in] n number of samples to read/write
|
|
*/
|
|
typedef void (*i2scallback_t)(I2SDriver *i2sp, size_t offset, size_t n);
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
* @note It could be empty on some architectures.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Transmission buffer pointer.
|
|
* @note Can be @p NULL if TX is not required.
|
|
*/
|
|
const void *tx_buffer;
|
|
/**
|
|
* @brief Receive buffer pointer.
|
|
* @note Can be @p NULL if RX is not required.
|
|
*/
|
|
void *rx_buffer;
|
|
/**
|
|
* @brief TX and RX buffers size as number of samples.
|
|
*/
|
|
size_t size;
|
|
/**
|
|
* @brief Callback function called during streaming.
|
|
*/
|
|
i2scallback_t end_cb;
|
|
/* End of the mandatory fields.*/
|
|
} I2SConfig;
|
|
|
|
/**
|
|
* @brief Structure representing an I2S driver.
|
|
*/
|
|
struct I2SDriver {
|
|
/**
|
|
* @brief Driver state.
|
|
*/
|
|
i2sstate_t state;
|
|
/**
|
|
* @brief Current configuration data.
|
|
*/
|
|
const I2SConfig *config;
|
|
/* End of the mandatory fields.*/
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#if (PLATFORM_I2S_USE_I2S1 == TRUE) && !defined(__DOXYGEN__)
|
|
extern I2SDriver I2SD1;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void i2s_lld_init(void);
|
|
void i2s_lld_start(I2SDriver *i2sp);
|
|
void i2s_lld_stop(I2SDriver *i2sp);
|
|
void i2s_lld_start_exchange(I2SDriver *i2sp);
|
|
void i2s_lld_stop_exchange(I2SDriver *i2sp);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_I2S == TRUE */
|
|
|
|
#endif /* HAL_I2S_LLD_H */
|
|
|
|
/** @} */
|