async.h
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上传日期:2022-07-16
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- /* ----------------------------------------------------------------------------
- * ATMEL Microcontroller Software Support
- * ----------------------------------------------------------------------------
- * Copyright (c) 2008, Atmel Corporation
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the disclaimer below.
- *
- * Atmel's name may not be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
- * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ----------------------------------------------------------------------------
- */
- #ifndef ASYNC_H
- #define ASYNC_H
- //------------------------------------------------------------------------------
- // Global definitions
- //------------------------------------------------------------------------------
- /// Transfer is still pending.
- #define ASYNC_STATUS_PENDING 0xFF
- //------------------------------------------------------------------------------
- // Global types
- //------------------------------------------------------------------------------
- //------------------------------------------------------------------------------
- /// Asynchronous transfer descriptor.
- //------------------------------------------------------------------------------
- typedef struct _Async {
- // Asynchronous transfer status.
- volatile unsigned char status;
- // Callback function to invoke when transfer completes or fails.
- void *callback;
- // Driver storage area; do not use.
- unsigned int pStorage[4];
- } Async;
- //------------------------------------------------------------------------------
- // Global functions
- //------------------------------------------------------------------------------
- extern unsigned char ASYNC_IsFinished(Async *pAsync);
- #endif //#ifndef ASYNC_H