322 lines
9.9 KiB
C
322 lines
9.9 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 STM32/i2s_lld.h
|
|
* @brief I2S Driver subsystem low level driver header template.
|
|
*
|
|
* @addtogroup I2S
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _I2S_LLD_H_
|
|
#define _I2S_LLD_H_
|
|
|
|
#if HAL_USE_I2S || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @name Configuration options
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief I2S2 driver enable switch.
|
|
* @details If set to @p TRUE the support for I2S2 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(STM32_I2S_USE_I2S2) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_USE_I2S2 FALSE
|
|
#endif
|
|
|
|
/**
|
|
* @brief I2S3 driver enable switch.
|
|
* @details If set to @p TRUE the support for I2S3 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(STM32_I2S_USE_I2S3) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_USE_I2S3 FALSE
|
|
#endif
|
|
|
|
/**
|
|
* @brief I2S2 interrupt priority level setting.
|
|
*/
|
|
#if !defined(STM32_I2S_I2S2_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S2_IRQ_PRIORITY 10
|
|
#endif
|
|
|
|
/**
|
|
* @brief I2S3 interrupt priority level setting.
|
|
*/
|
|
#if !defined(STM32_I2S_I2S3_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S3_IRQ_PRIORITY 10
|
|
#endif
|
|
|
|
/**
|
|
* @brief I2S2 DMA priority (0..3|lowest..highest).
|
|
*/
|
|
#if !defined(STM32_I2S_I2S2_DMA_PRIORITY) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S2_DMA_PRIORITY 1
|
|
#endif
|
|
|
|
/**
|
|
* @brief I2S3 DMA priority (0..3|lowest..highest).
|
|
*/
|
|
#if !defined(STM32_I2S_I2S2_DMA_PRIORITY) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S2_DMA_PRIORITY 1
|
|
#endif
|
|
|
|
/**
|
|
* @brief I2S DMA error hook.
|
|
*/
|
|
#if !defined(STM32_I2S_DMA_ERROR_HOOK) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_DMA_ERROR_HOOK(i2sp) chSysHalt()
|
|
#endif
|
|
|
|
#if STM32_ADVANCED_DMA || defined(__DOXYGEN__)
|
|
|
|
/**
|
|
* @brief DMA stream used for I2S2 RX operations.
|
|
* @note This option is only available on platforms with enhanced DMA.
|
|
*/
|
|
#if !defined(STM32_I2S_I2S2_RX_DMA_STREAM) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S2_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 0)
|
|
#endif
|
|
|
|
/**
|
|
* @brief DMA stream used for I2S2 TX operations.
|
|
* @note This option is only available on platforms with enhanced DMA.
|
|
*/
|
|
#if !defined(STM32_I2S_I2S2_TX_DMA_STREAM) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 4)
|
|
#endif
|
|
|
|
/**
|
|
* @brief DMA stream used for I2S3 RX operations.
|
|
* @note This option is only available on platforms with enhanced DMA.
|
|
*/
|
|
#if !defined(STM32_I2S_I2S3_RX_DMA_STREAM) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S3_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 0)
|
|
#endif
|
|
|
|
/**
|
|
* @brief DMA stream used for I2S3 TX operations.
|
|
* @note This option is only available on platforms with enhanced DMA.
|
|
*/
|
|
#if !defined(STM32_I2S_I2S3_TX_DMA_STREAM) || defined(__DOXYGEN__)
|
|
#define STM32_I2S_I2S3_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 7)
|
|
#endif
|
|
|
|
#else /* !STM32_ADVANCED_DMA */
|
|
|
|
/* Fixed streams for platforms using the old DMA peripheral, the values are
|
|
valid for both STM32F1xx and STM32L1xx.*/
|
|
#define STM32_I2S_I2S2_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 4)
|
|
#define STM32_I2S_I2S2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 5)
|
|
#define STM32_I2S_I2S3_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 1)
|
|
#define STM32_I2S_I2S3_TX_DMA_STREAM STM32_DMA_STREAM_ID(2, 2)
|
|
|
|
#endif /* !STM32_ADVANCED_DMA */
|
|
/** @} */
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
#if STM32_I2S_USE_I2S2 && !STM32_HAS_SPI2
|
|
#error "SPI2 not present in the selected device"
|
|
#endif
|
|
|
|
#if STM32_I2S_USE_I2S3 && !STM32_HAS_SPI3
|
|
#error "SPI3 not present in the selected device"
|
|
#endif
|
|
|
|
#if !STM32_I2S_USE_I2S2 && !STM32_I2S_USE_I2S3
|
|
#error "I2S driver activated but no I2S peripheral assigned"
|
|
#endif
|
|
|
|
#if STM32_I2S_USE_I2S2 && \
|
|
!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S2_RX_DMA_STREAM, STM32_SPI2_RX_DMA_MSK)
|
|
#error "invalid DMA stream associated to I2S2 RX"
|
|
#endif
|
|
|
|
#if STM32_I2S_USE_I2S2 && \
|
|
!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S2_TX_DMA_STREAM, STM32_SPI2_TX_DMA_MSK)
|
|
#error "invalid DMA stream associated to I2S2 TX"
|
|
#endif
|
|
|
|
#if STM32_I2S_USE_I2S3 && \
|
|
!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S3_RX_DMA_STREAM, STM32_SPI3_RX_DMA_MSK)
|
|
#error "invalid DMA stream associated to I2S3 RX"
|
|
#endif
|
|
|
|
#if STM32_I2S_USE_I2S3 && \
|
|
!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S3_TX_DMA_STREAM, STM32_SPI3_TX_DMA_MSK)
|
|
#error "invalid DMA stream associated to I2S3 TX"
|
|
#endif
|
|
|
|
#if !defined(STM32_DMA_REQUIRED)
|
|
#define STM32_DMA_REQUIRED
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief I2S mode type.
|
|
*/
|
|
typedef uint32_t i2smode_t;
|
|
|
|
/**
|
|
* @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] buffer pointer to the buffer
|
|
* @param[in] n number of sample positions starting from @p buffer
|
|
*/
|
|
typedef void (*i2scallback_t)(I2SDriver *i2sp, void *buffer, size_t n);
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
* @note It could be empty on some architectures.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief I2S mode selection.
|
|
*/
|
|
i2smode_t mode;
|
|
/**
|
|
* @brief Transmission buffer pointer.
|
|
*/
|
|
const void *tx_buffer;
|
|
/**
|
|
* @brief Transmission buffer size in number of samples.
|
|
*/
|
|
size_t tx_size;
|
|
/**
|
|
* @brief Callback function associated to the transmission or @p NULL.
|
|
*/
|
|
i2scallback_t tx_cb;
|
|
/**
|
|
* @brief Receive buffer pointer.
|
|
*/
|
|
void *rx_buffer;
|
|
/**
|
|
* @brief Receive buffer size in number of samples.
|
|
*/
|
|
size_t rx_size;
|
|
/**
|
|
* @brief Callback function associated to the reception or @p NULL.
|
|
*/
|
|
i2scallback_t rx_cb;;
|
|
/* End of the mandatory fields.*/
|
|
/**
|
|
* @brief Configuration of the I2SCFGR register.
|
|
* @details See the STM32 reference manual, this register is used for
|
|
* the I2S configuration, the following bits must not be
|
|
* specified because handled directly by the driver:
|
|
* - I2SMOD
|
|
* - I2SE
|
|
* - I2SCFG
|
|
* .
|
|
*/
|
|
int16_t i2scfgr;
|
|
/**
|
|
* @brief Configuration of the I2SPR register.
|
|
* @details See the STM32 reference manual, this register is used for
|
|
* the I2S clock setup.
|
|
*/
|
|
int16_t i2spr;
|
|
} 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.*/
|
|
/**
|
|
* @brief Pointer to the SPIx registers block.
|
|
*/
|
|
SPI_TypeDef *spi;
|
|
/**
|
|
* @brief DMA stream.
|
|
*/
|
|
const stm32_dma_stream_t *dma;
|
|
/**
|
|
* @brief DMA mode bit mask.
|
|
*/
|
|
uint32_t dmamode;
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#if STM32_I2S_USE_I2S2 && !defined(__DOXYGEN__)
|
|
extern I2SDriver I2SD2;
|
|
#endif
|
|
|
|
#if STM32_I2S_USE_I2S3 && !defined(__DOXYGEN__)
|
|
extern I2SDriver I2SD3;
|
|
#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_start_exchange_continuous(I2SDriver *i2sp);
|
|
void i2s_lld_stop_exchange(I2SDriver *i2sp);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_I2S */
|
|
|
|
#endif /* _I2S_LLD_H_ */
|
|
|
|
/** @} */
|