ringbuf.h

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#ifndef _RING_BUF_H_
#define _RING_BUF_H_

#include <esp8266.h>
#include "typedef.h"

typedef struct{
    U8* p_o;                /**< Original pointer */
    U8* volatile p_r;       /**< Read pointer */
    U8* volatile p_w;       /**< Write pointer */
    volatile I32 fill_cnt;  /**< Number of filled slots */
    I32 size;               /**< Buffer size */
}RINGBUF;

I16 ICACHE_FLASH_ATTR RINGBUF_Init(RINGBUF *r, U8* buf, I32 size);
I16 ICACHE_FLASH_ATTR RINGBUF_Put(RINGBUF *r, U8 c);
I16 ICACHE_FLASH_ATTR RINGBUF_Get(RINGBUF *r, U8* c);
#endif