mirror of https://github.com/rusefi/ChibiOS.git
151 lines
4.4 KiB
C
151 lines
4.4 KiB
C
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/*
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ChibiOS - Copyright (C) 2006..2015 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 hal_buffers.h
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* @brief I/O Buffers macros and structures.
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*
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* @addtogroup HAL_BUFFERS
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* @{
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*/
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#ifndef _HAL_BUFFERS_H_
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#define _HAL_BUFFERS_H_
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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#define HAL_BUFFERS_QUEUE_SIZE 2
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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 Type of an I/O buffer.
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*/
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typedef struct hal_buffer io_buffer_t;
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/**
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* @brief Structure of a generic buffer.
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*/
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struct hal_buffer {
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/**
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* @brief Pointer to the buffer in memory.
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*/
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uint8_t *buffer;
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/**
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* @brief Pointer to the first non-used location in the buffer.
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*/
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uint8_t *limit;
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/**
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* @brief Pointer to the buffer boundary.
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*/
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uint8_t *top;
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};
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/**
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* @brief Type of a generic double buffer.
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*/
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typedef struct io_double_buffer io_double_buffer_t;
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/**
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* @brief Double buffer notification callback type.
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*
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* @param[in] iodbp the double buffer pointer
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*/
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typedef void (*dbnotify_t)(io_double_buffer_t *iodbp);
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/**
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* @brief Structure of a generic double buffer.
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*/
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struct io_double_buffer {
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/**
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* @brief Queue of waiting threads.
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*/
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threads_queue_t waiting;
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/**
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* @brief Active buffers counter.
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*/
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volatile size_t counter;
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/**
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* @brief Buffer write pointer.
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*/
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io_buffer_t *bwrptr;
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/**
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* @brief Buffer read pointer.
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*/
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io_buffer_t *brdptr;
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/**
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* @brief Pointer for R/W sequential access.
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*/
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uint8_t *ptr;
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/**
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* @brief Queue of buffer objects.
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*/
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io_buffer_t buffers[HAL_BUFFERS_QUEUE_SIZE];
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/**
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* @brief Data notification callback.
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*/
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dbnotify_t notify;
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/**
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* @brief Application defined field.
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*/
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void *link;
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};
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/**
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* @brief Type of an input double buffer.
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*/
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typedef io_double_buffer_t input_double_buffer_t;
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/**
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* @brief Type of an output double buffer.
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*/
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typedef io_double_buffer_t output_double_buffer_t;
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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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#ifdef __cplusplus
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extern "C" {
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#endif
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void iobInit(io_buffer_t *iobp, uint8_t *bp, size_t size);
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void idbObjectInit(input_double_buffer_t *idbp,
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uint8_t *b1p, uint8_t *b2p, size_t size,
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dbnotify_t infy, void *link);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _HAL_BUFFERS_H_ */
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/** @} */
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