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Diffstat (limited to 'openpcd/firmware/src/fifo.h')
-rw-r--r-- | openpcd/firmware/src/fifo.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/openpcd/firmware/src/fifo.h b/openpcd/firmware/src/fifo.h new file mode 100644 index 0000000..68430ee --- /dev/null +++ b/openpcd/firmware/src/fifo.h @@ -0,0 +1,23 @@ +#ifndef _FIFO_H +#define _FIFO_H + +struct fifo { + u_int16_t size; /* actual FIFO size, can be smaller than 'data' */ + u_int16_t producer; /* index of producer */ + u_int16_t consumer; /* index of consumer */ + u_int16_t watermark; + u_int8_t irq; + u_int8_t irq_en; + u_int8_t status; + void (*callback)(struct fifo *fifo, u_int8_t event, void *data); + void *cb_data; + u_int8_t data[FIFO_SIZE]; +}; + + +extern int fifo_init(struct fifo *fifo, u_int16_t size, void *cb_data); +extern u_int16_t fifo_data_get(struct fifo *fifo, u_int16_t len, u_int8_t *data); +extern u_int16_t fifo_data_put(struct fifo *fifo, u_int16_t len, u_int8_t *data); +extern int fifo_available(struct fifo *fifo); + +#endif |