You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
4 years ago
|
/**
|
||
|
|
* \file
|
||
|
|
*
|
||
|
|
* \brief I/O related functionality declaration.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
|
||
|
|
*
|
||
|
|
* \asf_license_start
|
||
|
|
*
|
||
|
|
* \page License
|
||
|
|
*
|
||
|
|
* Subject to your compliance with these terms, you may use Microchip
|
||
|
|
* software and any derivatives exclusively with Microchip products.
|
||
|
|
* It is your responsibility to comply with third party license terms applicable
|
||
|
|
* to your use of third party software (including open source software) that
|
||
|
|
* may accompany Microchip software.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
|
||
|
|
* WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
|
||
|
|
* INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
|
||
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
|
||
|
|
* LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
|
||
|
|
* LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
|
||
|
|
* SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
|
||
|
|
* POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT
|
||
|
|
* ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
|
||
|
|
* RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
|
||
|
|
* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
|
||
|
|
*
|
||
|
|
* \asf_license_stop
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _HAL_IO_INCLUDED
|
||
|
|
#define _HAL_IO_INCLUDED
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \addtogroup doc_driver_hal_helper_io I/O Driver
|
||
|
|
*
|
||
|
|
*@{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <compiler.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief I/O descriptor
|
||
|
|
*
|
||
|
|
* The I/O descriptor forward declaration.
|
||
|
|
*/
|
||
|
|
struct io_descriptor;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief I/O write function pointer type
|
||
|
|
*/
|
||
|
|
typedef int32_t (*io_write_t)(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief I/O read function pointer type
|
||
|
|
*/
|
||
|
|
typedef int32_t (*io_read_t)(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief I/O descriptor
|
||
|
|
*/
|
||
|
|
struct io_descriptor {
|
||
|
|
io_write_t write; /*! The write function pointer. */
|
||
|
|
io_read_t read; /*! The read function pointer. */
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief I/O write interface
|
||
|
|
*
|
||
|
|
* This function writes up to \p length of bytes to a given I/O descriptor.
|
||
|
|
* It returns the number of bytes actually write.
|
||
|
|
*
|
||
|
|
* \param[in] descr An I/O descriptor to write
|
||
|
|
* \param[in] buf The buffer pointer to story the write data
|
||
|
|
* \param[in] length The number of bytes to write
|
||
|
|
*
|
||
|
|
* \return The number of bytes written
|
||
|
|
*/
|
||
|
|
int32_t io_write(struct io_descriptor *const io_descr, const uint8_t *const buf, const uint16_t length);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \brief I/O read interface
|
||
|
|
*
|
||
|
|
* This function reads up to \p length bytes from a given I/O descriptor, and
|
||
|
|
* stores it in the buffer pointed to by \p buf. It returns the number of bytes
|
||
|
|
* actually read.
|
||
|
|
*
|
||
|
|
* \param[in] descr An I/O descriptor to read
|
||
|
|
* \param[in] buf The buffer pointer to story the read data
|
||
|
|
* \param[in] length The number of bytes to read
|
||
|
|
*
|
||
|
|
* \return The number of bytes actually read. This number can be less than the
|
||
|
|
* requested length. E.g., in a driver that uses ring buffer for
|
||
|
|
* reception, it may depend on the availability of data in the
|
||
|
|
* ring buffer.
|
||
|
|
*/
|
||
|
|
int32_t io_read(struct io_descriptor *const io_descr, uint8_t *const buf, const uint16_t length);
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
/**@}*/
|
||
|
|
#endif /* _HAL_IO_INCLUDED */
|