28 lines
735 B
C
28 lines
735 B
C
#ifndef _FIFO_H
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#define _FIFO_H
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#include <include/types.h>
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#define FIFO_SIZE 1024
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struct fifo {
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u_int16_t size; /* actual FIFO size, can be smaller than 'data' */
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u_int16_t producer; /* index of producer */
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u_int16_t consumer; /* index of consumer */
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u_int16_t watermark;
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u_int8_t irq;
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u_int8_t irq_en;
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u_int8_t status;
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void (*callback)(struct fifo *fifo, u_int8_t event, void *data);
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void *cb_data;
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u_int8_t data[FIFO_SIZE];
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};
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extern int fifo_init(struct fifo *fifo, u_int16_t size, void *cb_data);
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extern u_int16_t fifo_data_get(struct fifo *fifo, u_int16_t len, u_int8_t *data);
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extern u_int16_t fifo_data_put(struct fifo *fifo, u_int16_t len, u_int8_t *data);
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extern int fifo_available(struct fifo *fifo);
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#endif
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