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#ifndef _FIFO_H_
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#ifndef _FIFO_H_
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#define _FIFO_H_
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#define _FIFO_H_
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#include <stdio.h>
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#include <stdio.h>
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#include "91x_lib.h"
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#include "91x_lib.h"
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#define NO_ITLine 0xFFFF
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// the fifo object
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// the fifo object
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typedef struct
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typedef struct
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{
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{
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        u8 *buffer;                              // pointer to start of the ringbuffer
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        u8 *buffer;                             // pointer to start of the ringbuffer
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        u8 count;                        // number of characters in FIFO
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        u16 count;                              // number of bytes in FIFO
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        u16 size;                // buffer size
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        u16 size;                               // buffer size
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        u8 *pread;               // read pointer
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        u8 *pread;                              // read pointer
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        u8 *pwrite;              // write pointer
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        u8 *pwrite;                             // write pointer
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        u16 putvicsource;               // IRQ source to block, during put
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        u16 getvicsource;               // IRQ source to block, during get
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} fifo_t;
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} fifo_t;
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/*
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/*
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The initialization of the FIFO sets the read/write pointers etc..
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The initialization of the FIFO sets the read/write pointers etc..
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The FIFO uses the buffer 'buf' which byte length must 'size'.
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The FIFO uses the buffer 'buf' which byte length must 'size'.
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Returns 1 on success ans 0 in case of an error.
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Returns 1 on success ans 0 in case of an error.
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*/
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*/
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u8 fifo_init (fifo_t* f, u8* buf, const u16 size);
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u8 fifo_init (fifo_t* f, u8* buffer, const u16 size, u16 putvicsource, u16 getvicsource);
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/*
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/*
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Puts a byte into the FIFO. Returns 1 on success and 0 in case of FIFO overflow.
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Puts a byte into the FIFO. Returns 1 on success and 0 in case of FIFO overflow.
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*/
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*/
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u8 fifo_put (fifo_t* f, const u8 data);
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u8 fifo_put (fifo_t* f, const u8 data);
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/*
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/*
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Get the next byte from the FIFO. Returns 0 if the FIFO is empty.
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Get the next byte from the FIFO. Returns 0 if the FIFO is empty.
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*/
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*/
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u8 fifo_get (fifo_t* f, u8* pdata);
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u8 fifo_get (fifo_t* f, u8* pdata);
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/*
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/*
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Get the next byte out of the FIFO. If the FIFO is empty the function blocks
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Get the next byte out of the FIFO. If the FIFO is empty the function blocks
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until the next byte is put into the FIFO.
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until the next byte is put into the FIFO.
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*/
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*/
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u8 fifo_get_wait (fifo_t* f, u8* pdata);
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u8 fifo_get_wait (fifo_t* f, u8* pdata);
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/*
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/*
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Purges the FIFO so that it is empty afterwards
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Purges the FIFO so that it is empty afterwards
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*/
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*/
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void fifo_purge (fifo_t* f);
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void fifo_purge (fifo_t* f);
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#endif /* _FIFO_H_ */
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#endif /* _FIFO_H_ */
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