318 lines
9.8 KiB
C
318 lines
9.8 KiB
C
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/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file STM32/i2s_lld.h
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* @brief I2S Driver subsystem low level driver header template.
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*
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* @addtogroup I2S
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* @{
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*/
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#ifndef _I2S_LLD_H_
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#define _I2S_LLD_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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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @name Configuration options
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* @{
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*/
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/**
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* @brief I2S2 driver enable switch.
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* @details If set to @p TRUE the support for I2S2 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_I2S_USE_I2S2) || defined(__DOXYGEN__)
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#define STM32_I2S_USE_I2S2 FALSE
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#endif
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/**
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* @brief I2S3 driver enable switch.
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* @details If set to @p TRUE the support for I2S3 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_I2S_USE_I2S3) || defined(__DOXYGEN__)
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#define STM32_I2S_USE_I2S3 FALSE
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#endif
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/**
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* @brief I2S2 interrupt priority level setting.
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*/
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#if !defined(STM32_I2S_I2S2_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S2_IRQ_PRIORITY 10
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#endif
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/**
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* @brief I2S3 interrupt priority level setting.
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*/
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#if !defined(STM32_I2S_I2S3_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S3_IRQ_PRIORITY 10
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#endif
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/**
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* @brief I2S2 DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_I2S_I2S2_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S2_DMA_PRIORITY 1
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#endif
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/**
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* @brief I2S3 DMA priority (0..3|lowest..highest).
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*/
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#if !defined(STM32_I2S_I2S2_DMA_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S2_DMA_PRIORITY 1
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#endif
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/**
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* @brief I2S DMA error hook.
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*/
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#if !defined(STM32_I2S_DMA_ERROR_HOOK) || defined(__DOXYGEN__)
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#define STM32_I2S_DMA_ERROR_HOOK(i2sp) chSysHalt()
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#endif
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#if STM32_ADVANCED_DMA || defined(__DOXYGEN__)
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/**
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* @brief DMA stream used for I2S2 RX operations.
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* @note This option is only available on platforms with enhanced DMA.
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*/
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#if !defined(STM32_I2S_I2S2_RX_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S2_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 0)
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#endif
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/**
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* @brief DMA stream used for I2S2 TX operations.
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* @note This option is only available on platforms with enhanced DMA.
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*/
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#if !defined(STM32_I2S_I2S2_TX_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 4)
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#endif
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/**
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* @brief DMA stream used for I2S3 RX operations.
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* @note This option is only available on platforms with enhanced DMA.
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*/
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#if !defined(STM32_I2S_I2S3_RX_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S3_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 0)
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#endif
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/**
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* @brief DMA stream used for I2S3 TX operations.
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* @note This option is only available on platforms with enhanced DMA.
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*/
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#if !defined(STM32_I2S_I2S3_TX_DMA_STREAM) || defined(__DOXYGEN__)
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#define STM32_I2S_I2S3_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 7)
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#endif
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#else /* !STM32_ADVANCED_DMA */
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/* Fixed streams for platforms using the old DMA peripheral, the values are
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valid for both STM32F1xx and STM32L1xx.*/
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#define STM32_I2S_I2S2_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 4)
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#define STM32_I2S_I2S2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 5)
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#define STM32_I2S_I2S3_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 1)
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#define STM32_I2S_I2S3_TX_DMA_STREAM STM32_DMA_STREAM_ID(2, 2)
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#endif /* !STM32_ADVANCED_DMA */
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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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#if STM32_I2S_USE_I2S2 && !STM32_HAS_SPI2
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#error "SPI2 not present in the selected device"
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#endif
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#if STM32_I2S_USE_I2S3 && !STM32_HAS_SPI3
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#error "SPI3 not present in the selected device"
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#endif
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#if !STM32_I2S_USE_I2S2 && !STM32_I2S_USE_I2S3
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#error "I2S driver activated but no I2S peripheral assigned"
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#endif
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#if STM32_I2S_USE_I2S2 && \
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!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S2_RX_DMA_STREAM, STM32_SPI2_RX_DMA_MSK)
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#error "invalid DMA stream associated to I2S2 RX"
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#endif
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#if STM32_I2S_USE_I2S2 && \
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!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S2_TX_DMA_STREAM, STM32_SPI2_TX_DMA_MSK)
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#error "invalid DMA stream associated to I2S2 TX"
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#endif
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#if STM32_I2S_USE_I2S3 && \
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!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S3_RX_DMA_STREAM, STM32_SPI3_RX_DMA_MSK)
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#error "invalid DMA stream associated to I2S3 RX"
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#endif
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#if STM32_I2S_USE_I2S3 && \
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!STM32_DMA_IS_VALID_ID(STM32_I2S_I2S3_TX_DMA_STREAM, STM32_SPI3_TX_DMA_MSK)
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#error "invalid DMA stream associated to I2S3 TX"
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#endif
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#if !defined(STM32_DMA_REQUIRED)
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#define STM32_DMA_REQUIRED
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#endif
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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 I2S mode type.
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*/
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typedef uint32_t i2smode_t;
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/**
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* @brief Type of a structure representing an I2S driver.
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*/
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typedef struct I2SDriver I2SDriver;
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/**
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* @brief I2S notification callback type.
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*
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* @param[in] i2sp pointer to the @p I2SDriver object
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* @param[in] buffer pointer to the buffer
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* @param[in] n number of sample positions starting from @p buffer
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*/
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typedef void (*i2scallback_t)(I2SDriver *i2sp, void *buffer, size_t n);
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/**
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* @brief Driver configuration structure.
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* @note It could be empty on some architectures.
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*/
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typedef struct {
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/**
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* @brief I2S mode selection.
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*/
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i2smode_t mode;
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/**
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* @brief Transmission buffer pointer.
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*/
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const void *tx_buffer;
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/**
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* @brief Transmission buffer size in number of samples.
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*/
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size_t tx_size;
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/**
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* @brief Callback function associated to the transmission or @p NULL.
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*/
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i2scallback_t tx_cb;
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/**
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* @brief Receive buffer pointer.
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*/
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void *rx_buffer;
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/**
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* @brief Receive buffer size in number of samples.
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*/
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size_t rx_size;
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/**
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* @brief Callback function associated to the reception or @p NULL.
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*/
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i2scallback_t rx_cb;;
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/* End of the mandatory fields.*/
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/**
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* @brief Configuration of the I2SCFGR register.
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* @details See the STM32 reference manual, this register is used for
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* the I2S configuration, the following bits must not be
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* specified because handled directly by the driver:
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* - I2SMOD
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* - I2SE
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* - I2SCFG
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* .
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*/
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int16_t i2scfgr;
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/**
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* @brief Configuration of the I2SPR register.
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* @details See the STM32 reference manual, this register is used for
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* the I2S clock setup.
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*/
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int16_t i2spr;
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} I2SConfig;
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/**
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* @brief Structure representing an I2S driver.
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*/
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struct I2SDriver {
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/**
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* @brief Driver state.
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*/
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i2sstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const I2SConfig *config;
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/* End of the mandatory fields.*/
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/**
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* @brief Pointer to the SPIx registers block.
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*/
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SPI_TypeDef *spi;
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/**
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* @brief DMA stream.
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*/
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const stm32_dma_stream_t *dma;
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/**
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* @brief DMA mode bit mask.
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*/
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uint32_t dmamode;
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if STM32_I2S_USE_I2S2 && !defined(__DOXYGEN__)
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extern I2SDriver I2SD2;
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#endif
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#if STM32_I2S_USE_I2S3 && !defined(__DOXYGEN__)
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extern I2SDriver I2SD3;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void i2s_lld_init(void);
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void i2s_lld_start(I2SDriver *i2sp);
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void i2s_lld_stop(I2SDriver *i2sp);
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void i2s_lld_start_exchange(I2SDriver *i2sp);
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void i2s_lld_start_exchange_continuous(I2SDriver *i2sp);
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void i2s_lld_stop_exchange(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_LLD_H_ */
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/** @} */
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