my_ringbuff.h
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#ifndef __MY_RINGBUFF_H_
#define __MY_RINGBUFF_H_
#include "stm32f4xx.h"
typedef struct
{
char *buffer; /*缓冲区的数据*/
int size; /*缓冲区大小*/
int pRead; /*读指针，名义上的指针，只是为了记录位置而已*/
int pWrite; /*写指针，名义上的指针，只是为了记录位置而已*/
}ringBuf_t;
/*先不考虑互斥锁*/
/*先不考虑写覆盖和读重复问题，后续设计有效数据记录变量来解决*/
ringBuf_t *ringBufInit(ringBuf_t* ringBuffer,int size);
int ringBufRead(ringBuf_t *ringBuffer,char *readBuf,int readLength);
int ringBufWrite(ringBuf_t *ringBuffer,char *writeBuf,int writeLength);
int ringBufDataLen(ringBuf_t *ringBuffer);
void ringBufFree(ringBuf_t *ringBuffer);
void ringBufReset(ringBuf_t *ringBuffer,uint16_t size);
#endif