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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 | #define NO_ITLine 0xFFFF |
|
6 | 7 | ||
7 | // the fifo object |
8 | // the fifo object |
8 | typedef struct |
9 | typedef struct |
9 | { |
10 | { |
10 | u8 *buffer; // pointer to start of the ringbuffer |
11 | u8 *buffer; // pointer to start of the ringbuffer |
11 | u8 count; // number of characters in FIFO |
12 | u16 count; // number of bytes in FIFO |
12 | u16 size; // buffer size |
13 | u16 size; // buffer size |
13 | u8 *pread; // read pointer |
14 | u8 *pread; // read pointer |
14 | u8 *pwrite; // write pointer |
15 | u8 *pwrite; // write pointer |
- | 16 | u16 putvicsource; // IRQ source to block, during put |
|
- | 17 | u16 getvicsource; // IRQ source to block, during get |
|
15 | } fifo_t; |
18 | } fifo_t; |
16 | 19 | ||
17 | /* |
20 | /* |
18 | The initialization of the FIFO sets the read/write pointers etc.. |
21 | The initialization of the FIFO sets the read/write pointers etc.. |
19 | The FIFO uses the buffer 'buf' which byte length must 'size'. |
22 | The FIFO uses the buffer 'buf' which byte length must 'size'. |
20 | Returns 1 on success ans 0 in case of an error. |
23 | Returns 1 on success ans 0 in case of an error. |
21 | */ |
24 | */ |
22 | u8 fifo_init (fifo_t* f, u8* buf, const u16 size); |
25 | u8 fifo_init (fifo_t* f, u8* buffer, const u16 size, u16 putvicsource, u16 getvicsource); |
23 | 26 | ||
24 | /* |
27 | /* |
25 | Puts a byte into the FIFO. Returns 1 on success and 0 in case of FIFO overflow. |
28 | Puts a byte into the FIFO. Returns 1 on success and 0 in case of FIFO overflow. |
26 | */ |
29 | */ |
27 | u8 fifo_put (fifo_t* f, const u8 data); |
30 | u8 fifo_put (fifo_t* f, const u8 data); |
28 | 31 | ||
29 | /* |
32 | /* |
30 | Get the next byte from the FIFO. Returns 0 if the FIFO is empty. |
33 | Get the next byte from the FIFO. Returns 0 if the FIFO is empty. |
31 | */ |
34 | */ |
32 | u8 fifo_get (fifo_t* f, u8* pdata); |
35 | u8 fifo_get (fifo_t* f, u8* pdata); |
33 | 36 | ||
34 | /* |
37 | /* |
35 | Get the next byte out of the FIFO. If the FIFO is empty the function blocks |
38 | 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. |
39 | until the next byte is put into the FIFO. |
37 | */ |
40 | */ |
38 | u8 fifo_get_wait (fifo_t* f, u8* pdata); |
41 | u8 fifo_get_wait (fifo_t* f, u8* pdata); |
39 | 42 | ||
40 | /* |
43 | /* |
41 | Purges the FIFO so that it is empty afterwards |
44 | Purges the FIFO so that it is empty afterwards |
42 | */ |
45 | */ |
43 | void fifo_purge (fifo_t* f); |
46 | void fifo_purge (fifo_t* f); |
44 | 47 | ||
45 | #endif /* _FIFO_H_ */ |
48 | #endif /* _FIFO_H_ */ |
46 | 49 |