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1 | #ifndef _FIFO_H_ |
1 | #ifndef _FIFO_H_ |
2 | #define _FIFO_H_ |
2 | #define _FIFO_H_ |
3 | 3 | ||
4 | #include <stdio.h> |
4 | #include <stdio.h> |
5 | #include "91x_lib.h" |
5 | #include "91x_lib.h" |
6 | 6 | ||
7 | // the fifo object |
7 | // the fifo object |
8 | typedef struct |
8 | typedef struct |
9 | { |
9 | { |
10 | u8 *buffer; // pointrer to start of the ringbuffer |
10 | u8 *buffer; // pointer to start of the ringbuffer |
11 | u8 count; // number of characters in FIFO |
11 | u8 count; // number of characters in FIFO |
12 | u8 size; // buffer size |
12 | u16 size; // buffer size |
13 | u8 *pread; // read pointer |
13 | u8 *pread; // read pointer |
14 | u8 *pwrite; // write pointer |
14 | u8 *pwrite; // write pointer |
15 | } fifo_t; |
15 | } fifo_t; |
16 | 16 | ||
17 | /* |
17 | /* |
18 | The initialization of the FIFO sets the read/write pointers etc.. |
18 | The initialization of the FIFO sets the read/write pointers etc.. |
19 | The FIFO uses the buffer 'buf' which byte length must 'size'. |
19 | The FIFO uses the buffer 'buf' which byte length must 'size'. |
20 | Returns 1 on success ans 0 in case of an error. |
20 | Returns 1 on success ans 0 in case of an error. |
21 | */ |
21 | */ |
22 | u8 fifo_init (fifo_t* f, u8* buf, const u8 size); |
22 | u8 fifo_init (fifo_t* f, u8* buf, const u16 size); |
23 | 23 | ||
24 | /* |
24 | /* |
25 | Puts a byte into the FIFO. Returns 1 on success and 0 in case of FIFO overflow. |
25 | Puts a byte into the FIFO. Returns 1 on success and 0 in case of FIFO overflow. |
26 | */ |
26 | */ |
27 | u8 fifo_put (fifo_t* f, const u8 data); |
27 | u8 fifo_put (fifo_t* f, const u8 data); |
28 | 28 | ||
29 | /* |
29 | /* |
30 | Get the next byte from the FIFO as int. Returns 0 if the FIFO is empty. |
30 | Get the next byte from the FIFO. Returns 0 if the FIFO is empty. |
31 | */ |
31 | */ |
32 | u8 fifo_get (fifo_t* f, u8* pdata); |
32 | u8 fifo_get (fifo_t* f, u8* pdata); |
33 | 33 | ||
34 | /* |
34 | /* |
35 | Get the next byte out of the FIFO. If the FIFO is empty the function blocks |
35 | Get the next byte out of the FIFO. If the FIFO is empty the function blocks |
36 | until the next byte is put into the FIFO. |
36 | until the next byte is put into the FIFO. |
37 | */ |
37 | */ |
38 | u8 fifo_get_wait (fifo_t* f, u8* pdata); |
38 | u8 fifo_get_wait (fifo_t* f, u8* pdata); |
39 | 39 | ||
- | 40 | /* |
|
40 | 41 | Purges the FIFO so that it is empty afterwards |
|
41 | - | ||
42 | - | ||
- | 42 | */ |
|
43 | 43 | void fifo_purge (fifo_t* f); |
|
44 | 44 | ||
45 | #endif /* _FIFO_H_ */ |
45 | #endif /* _FIFO_H_ */ |
46 | 46 |