async.h

Atmel的AT91SAM7X256的和24系列EEPROM通讯的源程序

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support  -  ROUSSET  -
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 * Copyright (c) 2007, Atmel Corporation

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#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