#ifndef __RINGFRAME_H
#define __RINGFRAME_H

/**@brief   A FIFO instance structure.
 * @details Keeps track of which bytes to read and write next.
 *          Also, it keeps the information about which memory is allocated for the buffer
 *          and its size. This structure must be initialized by app_fifo_init() before use.
 */
typedef enum
{
	ringframe_size_4 		  = 0x0004U,
	ringframe_size_8 		  = 0x0008U,
	ringframe_size_16 		= 0x0010U,								 	                            
	ringframe_size_32 		= 0x0020U,
	ringframe_size_64 		= 0x0040U,
	ringframe_size_128 		= 0x0080U,
  ringframe_size_256 		= 0x0100U,         
	ringframe_size_512 		= 0x0200U,
	ringframe_size_1024 	= 0x0400U,
	ringframe_size_2048 	= 0x0800U,
	ringframe_size_4096 	= 0x1000U,
	ringframe_size_8192 	= 0x2000U,
	ringframe_size_16384	= 0x4000U,
	ringframe_size_32768	= 0x8000U,
}ringframe_size_t;

typedef struct
{
  volatile unsigned short front;          //!< ringframe front index.
  volatile unsigned short back;           //!< ringframe back index.
	void           		* p_buffer;          //!< Pointer to the memory that is used as storage.
	ringframe_size_t  size;									//单位为字节
	unsigned short    element_count;
	unsigned short 		freespace;
} ringframe_t;

/******************************API 接口*************************************/
#define RINGFRAME_DEF( _name, _size)        								  \
				unsigned char   _name##_ringframe_buffer[(_size)];    \
				ringframe_t _name=                             			  \
								{                             							  \
									.front 					= 0,              				  \
									.back 					= 0,                    	  \
									.p_buffer 			= _name##_ringframe_buffer, \
									.size  					= (_size),          			  \
									.element_count	= 0,											  \
									.freespace      = (_size)-1,       				  \
								}    

//返回0表示操作成功，否则失败
unsigned short ringframe_in(ringframe_t * p_ringframe, void * p_data,unsigned char data_size);
//返回0表示操作成功，否则失败								
unsigned short ringframe_out(ringframe_t * p_ringframe, void * p_data,unsigned char * data_size);
								
void ringframe_reset(ringframe_t * p_ringframe);
//返回0表示操作成功，否则失败																	
unsigned short ringframe_peek(ringframe_t * p_ringframe, void * p_data,unsigned char * data_size);
//返回0表示操作成功，否则失败									
unsigned short ringframe_throw(ringframe_t * p_ringframe);
								
								
#endif