queue.h

按键是比较复杂。可以用状态机表示。 每10mS执行一次键盘扫描任务 0、无键

#ifndef _QUEUE_LXF_H
#define _QUEUE_LXF_H

#define QUEUESIZE	64
struct queue_t{
	// 多1个空间不用，方便判断队列是否满和空
	unsigned char mdata[QUEUESIZE+1];	
	unsigned char head, tail;
};

#define	queue_clear		queue_init
extern void queue_init(struct queue_t *p);
extern void queue_destory(void);
extern void queue_insert(struct queue_t *p, unsigned char x);
extern unsigned char queue_delete(struct queue_t *p);
extern unsigned char queue_isempty(struct queue_t *p);
extern void queue_insert_front(struct queue_t *p, unsigned char x);
extern unsigned char queue_delete_tail(struct queue_t *p);

#endif