Yu-Lun Tsai / Mbed 2 deprecated KetDiary_revision

nRF51822 serves as the bridge between BLE central and MCU, which makes cental able to fetch photos from serial camera.

Dependencies:   BLE_API mbed nRF51822

Fork of nRF51822_blinky by RedBearLab

inc/ringBuffer.h

Committer:
stormysun513
Date:
2016-05-22
Revision:
21:4753996b0bcb
Parent:
12:7060e287bdae

File content as of revision 21:4753996b0bcb:

#ifndef RINGBUFFER_H
#define RINGBUFFER_H

#include <stdint.h>

#define RX_BUFF_SIZE            129 
#define BYTES_PER_INTERRUPT     1

typedef struct {
    uint8_t buffer[RX_BUFF_SIZE];
    uint16_t length;
    uint16_t start;
    uint16_t end;
} RingBuffer;

void RingBuffer_init(RingBuffer *buffer);

int16_t RingBuffer_read(RingBuffer *buffer, uint8_t *target, uint16_t amount);
int16_t RingBuffer_write(RingBuffer *buffer, uint8_t *data, uint16_t amount);
bool RingBuffer_readbyte(RingBuffer *buffer, uint8_t *target);
bool RingBuffer_writebyte(RingBuffer *buffer, uint8_t byte);

bool RingBuffer_isEmpty(RingBuffer *buffer);
bool RingBuffer_isFull(RingBuffer *buffer);
uint16_t RingBuffer_availableDataAmount(RingBuffer *buffer);
uint16_t RingBuffer_avalailableSpaceAmount(RingBuffer *buffer);


#define RingBuffer_available_data(B) (((B)->end + (B)->length - (B)->start) % (B)->length)
#define RingBuffer_available_space(B) ((B)->length - 1 - RingBuffer_available_data((B)))
#define RingBuffer_full(B) (RingBuffer_available_data((B)) - ((B)->length - 1) == 0)
#define RingBuffer_empty(B) (RingBuffer_available_data((B)) == 0)
#define RingBuffer_puts(B, D) RingBuffer_write((B), bdata((D)), blength((D)))
#define RingBuffer_get_all(B) RingBuffer_gets((B), RingBuffer_available_data((B)))
#define RingBuffer_starts_at(B) ((B)->buffer + (B)->start)
#define RingBuffer_ends_at(B) ((B)->buffer + (B)->end)
#define RingBuffer_commit_read(B, A) ((B)->start = ((B)->start + (A)) % (B)->length)
#define RingBuffer_commit_write(B, A) ((B)->end = ((B)->end + (A)) % (B)->length)

#endif