C51 队列 方式 中断接收 查询发送

Keil C51没有 《stdbool.h》头文件，自己做一个

stdbool.h

#ifndef  __STDBOOL_H__#define  __STDBOOL_H__typedef enum{    false = 0,    true  = 1,}bool;#endif

最简单的数组模拟循环队列

Queue.h

#ifndef __QUEUE__#define __QUEUE__#include <REGX52.H>#include "stdbool.h"#define u8       unsigned char#define Maxsize 10typedef struct{u8 element[Maxsize];u8 front;u8 rear;}SeqCycleQueue;void Init_Cycle_Queue(SeqCycleQueue *Q);bool Entry_Queue(SeqCycleQueue *Q,u8 x);bool Delete_Queue(SeqCycleQueue *Q,u8 *x);bool Get_front_value(SeqCycleQueue *Q,u8 *x);bool Is_Queue_Full(SeqCycleQueue *Q);bool Is_Queue_Empty(SeqCycleQueue *Q);#endif

Queue.c

#include "Queue.h"SeqCycleQueue Q;void Init_Cycle_Queue(SeqCycleQueue *Q){Q->front = 0;Q->rear  = 0;}bool Entry_Queue(SeqCycleQueue *Q,u8 x){if((Q->rear+1) % Maxsize == Q->front)    {return false;    }Q->element[Q->rear] = x;Q->rear = (Q->rear+1) % Maxsize;return true;}bool Delete_Queue(SeqCycleQueue *Q,u8 *x){if(Q->front == Q->rear)return false;*x = Q->element[Q->front];Q->front = (Q->front+1) % Maxsize;return true;}bool Get_front_value(SeqCycleQueue *Q,u8 *x){if(Q->front == Q->rear)    {        return false;    }    else    {        *x = Q->element[Q->front];        return true;    }}bool Is_Queue_Full(SeqCycleQueue *Q){    if((Q->rear+1) % Maxsize == Q->front){         return true;    }    else    {    return false;    }}bool Is_Queue_Empty(SeqCycleQueue *Q){if(Q->front == Q->rear)    {return true;    }    else    {        return false;    }}

main.c

#include "Queue.h"volatile unsigned char rx_data;extern SeqCycleQueue Q;void Send_Char(u8 ch){    SBUF = ch;    while(TI == 0);    TI = 0;}//----------------------------------------------void main (void){    volatile unsigned char tmp = 0;    TMOD = 0x20;   //T1方式2    TH1 = 0xFD;    //Baud:9600bps@11.0592MHz    TL1 = 0xFD;    TR1 = 1;       //启动定时器1        SCON = 0x50;   //串口方式1, 8-n-1, 允许接收    REN = 1;      //使能串口接收    EA  = 1;      //打开总中断    ES  = 1;      //打开串口中断开关    Init_Cycle_Queue(&Q);    while(1)    {        if(!Is_Queue_Empty(&Q))        {            Delete_Queue(&Q, &tmp);            Send_Char(tmp);        }    }}//----------------------------------------------void serial(void) interrupt 4{    if(RI)    {        rx_data = SBUF;        //P1 = rx_data;        Entry_Queue(&Q, rx_data);        RI = 0;    }} //----------------------------------------------

阅读 51 手册，发送缓冲与接收缓冲是独立的两个SBUF(虽然都对应 名字一样的SUBF 特殊功能寄存器)

很遗憾，但就是没实现中断接收与中断发送的实验。