單片機的FIFO(先入先出)循環(huán)隊列實現(xiàn)
// 文件:config.h
//////////////////////////////////////////////////////////
#ifndef __CONFIG_H
#define __CONFIG_H
//這一段無需改動
//This segmentshould not be modified
#ifndef TRUE
#define TRUE 1
#endif
#define __CONFIG_H
//這一段無需改動
//This segmentshould not be modified
#ifndef TRUE
#define TRUE
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define FALSE 0
#endif
typedef unsigned char uint8;
typedef signed char int8;
typedef unsigned short uint16;
typedef signed short int16;
typedef unsigned int uint32;
typedef signed int int32;
typedef float fp32;
typedef signed
typedef unsigned short uint16;
typedef signed
typedef unsigned int
typedef signed
typedef float
#i nclude "FIFOQUEUE.h"
#endif
//////////////////////////////////////////////////////////
// 文件:FIFOQUEUE.h
//////////////////////////////////////////////////////////
#ifndef _FIFOQUEUE_H
#define _FIFOQUEUE_H
#define _FIFOQUEUE_H
#define ElemType uint8
#define QueueSize 20 //fifo隊列的大小
#define QueueFull 0 //fifo滿置0
#define QueueEmpty 1 //FIFO空置1
#define QueueOperateOk 2 //隊列操作完成 賦值為2
#define QueueFull
#define QueueEmpty
#define QueueOperateOk 2
struct FifoQueue
{
uint16 front; //隊列頭
uint16 rear; //隊列尾
uint16 count; //隊列計數(shù)
ElemType dat[QueueSize];
};
{
};
//Queue Initalize
extern void QueueInit(struct FifoQueue *Queue);
extern void QueueInit(struct FifoQueue *Queue);
// Queue In
extern uint8 QueueIn(struct FifoQueue *Queue,ElemType sdat);
extern uint8 QueueIn(struct FifoQueue *Queue,ElemType sdat);
// Queue Out
extern uint8 QueueOut(struct FifoQueue *Queue,ElemType *sdat);
extern uint8 QueueOut(struct FifoQueue *Queue,ElemType *sdat);
#endif
//////////////////////////////////////////////////////////
// 文件:FIFOQUEUE.C
//////////////////////////////////////////////////////////
#i nclude "config.h"
//Queue Init
void QueueInit(struct FifoQueue *Queue)
{
Queue->front = Queue->rear;//初始化時隊列頭隊列首相連
Queue->count = 0; //隊列計數(shù)為0
}
void QueueInit(struct FifoQueue *Queue)
{
}
// Queue In
uint8 QueueIn(struct FifoQueue *Queue,ElemType sdat) //數(shù)據(jù)進入隊列
{
if((Queue->front == Queue->rear) && (Queue->count == QueueSize))
{ // full //判斷如果隊列滿了
return QueueFull; //返回隊列滿的標志
}else
{ // in
Queue->dat[Queue->rear] = sdat;
Queue->rear = (Queue->rear + 1) % QueueSize;
Queue->count = Queue->count + 1;
return QueueOperateOk;
}
}
uint8 QueueIn(struct FifoQueue *Queue,ElemType sdat) //數(shù)據(jù)進入隊列
{
}
// Queue Out
uint8 QueueOut(struct FifoQueue *Queue,ElemType *sdat)
{
if((Queue->front == Queue->rear) && (Queue->count == 0))
{ // empty
return QueueEmpty;
}else
{ // out
*sdat = Queue->dat[Queue->front];
Queue->front = (Queue->front + 1) % QueueSize;
Queue->count = Queue->count - 1;
return QueueOperateOk;
}
}
uint8 QueueOut(struct FifoQueue *Queue,ElemType *sdat)
{
}
//////////////////////////////////////////////////////////
// 文件:Main.C
//////////////////////////////////////////////////////////
#i nclude
#i nclude "config.h"
#i nclude "config.h"
void main(void)
{
struct FifoQueue MyQueue;
ElemType sh;
uint8 i;
{
}
隊列是一種先進先出(first infirst out,縮寫為FIFO)的線性表。它只允許在標的一端進行插入,而在另一端刪除元素。這和我們?nèi)粘I钪械呐抨犑且恢碌?,最早進入隊列的元素最早離開。在隊列中,允許插入的一端叫做隊尾(rear),允許刪除的一端則稱為對頭(front)(排隊買票,窗口一端叫對頭,末尾進隊叫隊尾)。
評論