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| Rev 244 | Rev 272 | ||
|---|---|---|---|
| Line 11... | Line 11... | ||
| 11 | return(1); |
11 | return(1); |
| 12 | } |
12 | } |
| Line 13... | Line 13... | ||
| 13 | 13 | ||
| 14 | u8 fifo_put (fifo_t *f, const u8 data) |
14 | u8 fifo_put (fifo_t *f, const u8 data) |
| - | 15 | { |
|
| 15 | { |
16 | if(f->buffer == 0) return(0); |
| 16 | if (f->count >= f->size) return(0); // return 0 in case of FIFO overflow. |
17 | if (f->count >= f->size) return(0); // return 0 in case of FIFO overflow. |
| 17 | if(f->putvicsource != NO_ITLine) VIC_ITCmd(f->putvicsource, DISABLE); |
18 | if(f->putvicsource != NO_ITLine) VIC_ITCmd(f->putvicsource, DISABLE); |
| 18 | *(f->pwrite++) = data; // copy data byte to buffer |
19 | *(f->pwrite++) = data; // copy data byte to buffer |
| 19 | if(f->pwrite >= f->buffer + f->size) f->pwrite = f->buffer; // start at the begining after reaching the end |
20 | if(f->pwrite >= f->buffer + f->size) f->pwrite = f->buffer; // start at the begining after reaching the end |
| Line 22... | Line 23... | ||
| 22 | return(1); |
23 | return(1); |
| 23 | } |
24 | } |
| Line 24... | Line 25... | ||
| 24 | 25 | ||
| 25 | u8 fifo_get (fifo_t *f, u8 *pdata) |
26 | u8 fifo_get (fifo_t *f, u8 *pdata) |
| - | 27 | { |
|
| 26 | { |
28 | if(f->buffer == 0) return(0); |
| 27 | if(!f->count) return(0); |
29 | if(!f->count) return(0); |
| 28 | if(f->getvicsource != NO_ITLine) VIC_ITCmd(f->getvicsource, DISABLE); |
30 | if(f->getvicsource != NO_ITLine) VIC_ITCmd(f->getvicsource, DISABLE); |
| 29 | *pdata = *(f->pread++); |
31 | *pdata = *(f->pread++); |
| 30 | if(f->pread >= f->buffer + f->size) f->pread = f->buffer; // start at the begining after reaching the end |
32 | if(f->pread >= f->buffer + f->size) f->pread = f->buffer; // start at the begining after reaching the end |