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/*
FIFO Ring Buffer uint8_t array ring_buffer (example length is 8)
with data (x) and read and write index:
--- --- --- --- --- --- --- ---
| | | x | x | x | | | |
--- --- --- --- --- --- --- ---
^ ^
| |
read_index |
write_index
--- --- --- --- --- --- --- ---
| x | x | | | | x | x | x |
--- --- --- --- --- --- --- ---
^ ^
| |
write_index |
read_index
- input data goes to position of write_index
- output data comes from read_index position
- after input/output operation the according index has to be modified
- according to the idea of ring buffers the write_index could be
smaller than the read_index
*/
#ifndef FIFO_H
#define FIFO_H
#include <stdint.h>
#include <stdlib.h>
typedef struct FIFO{
uint8_t *buffer_ptr;
uint16_t bufferlength;
uint16_t read_index;
uint16_t write_index;
} FIFO;
void fifo_init(FIFO *fifo, uint8_t *buffer, uint16_t bufferlength);
uint16_t fifo_get_buffersize(FIFO *fifo);
uint16_t fifo_bytes_available(FIFO *fifo);
uint16_t fifo_lines_available(FIFO *fifo);
void fifo_move_read_index(FIFO *fifo);
void fifo_move_write_index(FIFO *fifo);
void fifo_get_byte(FIFO *fifo, uint8_t *data_sink);
void fifo_put_byte(FIFO *fifo, uint8_t *data_source);
#endif /* FIFO_H */
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