题目

题目解析

串口初始化配置

源码

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题目

题目解析

这套模拟题考了一个非常非常不常考的外设——串口。但是串口模块的代码也不难，可以在网上参考一下，串口的初始化也可以使用stc-isp烧录软件进行配置。

串口初始化配置

一份串口初始化代码，轻轻松松到手。

源码

main.h

#ifndef __MAIN_H_
#define __MAIN_H_

#define uchar unsigned char
#define uint unsigned int

#include <STC15F2K60S2.H>
#include <string.h>
#include <stdio.h>

#include "Init.h"
#include "SMG.h"
#include "DSQ.h"
#include "YanShi.h"
#include "JZKey.h"
#include "CSB.h"
#include "ChuanKou.h"

void LED_Show();

#endif

main.c

#include "main.h"

uchar key_num=0;
uchar key_num_old=0;
uchar JieMian=0;//界面。0：距离显示界面；1：参数显示界面
int JuLi_CanShu=30;//距离参数
uint ju_li=0;//距离
uchar date[50];
uchar L3_flag=0;
uint L3_time=0;
uchar ji_li_time=0;

void main(){
	Init_BZ();
	SMG_Init();
	ChuanKou_Init();
	DSQ_2_Init();
	JZKey_Init();
	while(1){
		key_num_old=key_num;
		key_num=JZKEy_GetKeynum();
		if(key_num_old!=key_num){
			if(key_num==4){
				JieMian++;
				JieMian=JieMian%2;
			}
			else if(key_num==8&&JieMian==0){
				JuLi_CanShu=ju_li;
			}
			else if(key_num==12&&JieMian==1){
				JuLi_CanShu=JuLi_CanShu+10;
				if(JuLi_CanShu>=999){
					JuLi_CanShu=999;
				}
			}
			else if(key_num==16&&JieMian==1){
				JuLi_CanShu=JuLi_CanShu-10;
				if(JuLi_CanShu<=0){
					JuLi_CanShu=0;
				}
			}
			else if(key_num==9){
				sprintf(date,"Distance；%dcm\n",ju_li);
				SendString(&date);
				memset(&date,'\0',sizeof(date));
			}
		}
		
		if(ji_li_time>=50){
			ju_li=CSB_GetJuLi();
			ji_li_time=0;
		}
	}
}

void DSQ_2_ZD() interrupt 12{
	ji_li_time++;
	if(JieMian){
		if(JuLi_CanShu>=100){
			SMG_Show(25,2,16,16,16,JuLi_CanShu/100,(JuLi_CanShu/10)%10,JuLi_CanShu%10);
		}
		else if(JuLi_CanShu>=10){
			SMG_Show(25,2,16,16,16,16,JuLi_CanShu/10,JuLi_CanShu%10);
		}
		else if(JuLi_CanShu>=0){
			SMG_Show(25,2,16,16,16,16,16,JuLi_CanShu);
		}
	}
	else{
		if(ju_li>=100){
			SMG_Show(25,1,16,16,16,ju_li/100,(ju_li/10)%10,ju_li%10);
		}
		else if(ju_li>=10){
			SMG_Show(25,1,16,16,16,16,ju_li/10,ju_li%10);
		}
		else if(ju_li>=0){
			SMG_Show(25,1,16,16,16,16,16,ju_li);
		}
	}
	
	if(ju_li>JuLi_CanShu){
		L3_time++;
		L3_flag=1;
		if(L3_time>=400){
			L3_time=0;
		}
	}
	else{
		L3_time=0;
		L3_flag=0;
	}
	
	LED_Show();
}

void LED_Show(){
	uchar L1_2=0xff;
	uchar L3=0xff;
	if(JieMian){	
		L1_2=0xfd;
	}
	else{
		L1_2=0xfe;
	}
	if(L3_flag){
		if(L3_time<200){
			L3=0xfb;
		}
	}
	P0=L1_2&L3;
	P2=(P2&0x1f)|0x80;
	P2=(P2&0x1f)|0x00;
}

Init.h

#ifndef __INIT_H_
#define __INIT_H_

#include <STC15F2K60S2.H>

void Init_BZ();

#endif

Init.c

#include "Init.h"

void Init_BZ(){
	P2=(P2&0x1f)|0xa0;
	P0=0x00;
	P2=(P2&0x1f)|0x80;
	P0=0xff;
}

SMG.h

#ifndef __SMG_H_
#define __SMG_H_

#include <STC15F2K60S2.H>

void SMG_Init();
void SMG_Show(unsigned char n1,n2,n3,n4,n5,n6,n7,n8);

#endif

SMG.c

#include "SMG.h"

unsigned char code t_display[]={                       //????
//   0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
    0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
//black  -     H    J    K    L    N    o   P    U     t    G    Q    r   M    y
    0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
    0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46};    //0. 1. 2. 3. 4. 5. 6. 7. 8. 9. -1

void SMG_Init(){
	P2=(P2&0x1f)|0xc0;
	P0=0xff;
	P2=(P2&0x1f)|0xe0;
	P0=0xff;
}

void SMG_Show(unsigned char n1,n2,n3,n4,n5,n6,n7,n8){
	static unsigned char i=0;
	i++;
	i=i%8;
	P2=(P2&0x1f)|0xc0;
	switch(i){
		case 1:{
			P0=0x01;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n1];
			break;
		}
		case 2:{
			P0=0x02;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n2];
			break;
		}
		case 3:{
			P0=0x04;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n3];
			break;
		}
		case 4:{
			P0=0x08;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n4];
			break;
		}
		case 5:{
			P0=0x10;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n5];
			break;
		}
		case 6:{
			P0=0x20;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n6];
			break;
		}
		case 7:{
			P0=0x40;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n7];
			break;
		}
		case 0:{
			P0=0x80;
			P2=(P2&0x1f)|0xe0;
			P0=~t_display[n8];
			break;
		}
	}
	P2=(P2&0x1f)|0x00;
}

DSQ.h

#ifndef __DSQ_H_
#define __DSQ_H_

#include <STC15F2K60S2.H>

void DSQ_2_Init();

#endif

DSQ.c

#include "DSQ.h"

void DSQ_2_Init(){
	AUXR |= 0x04;		//定时器时钟1T模式
	T2L = 0x20;		//设置定时初值
	T2H = 0xD1;		//设置定时初值
	AUXR |= 0x10;		//定时器2开始计时
	AUXR=AUXR&0xf7;
	IE2=IE2|0x04;
	EA=1;
}

YanShi.h

#ifndef __YANSHI_H_
#define __YANSHI_H_

#include <STC15F2K60S2.H>
#include "intrins.h"

void Delay10ms();

#endif

YanShi.c

#include "YanShi.h"

void Delay10ms()		//@12.000MHz
{
	unsigned char i, j;

	i = 117;
	j = 184;
	do
	{
		while (--j);
	} while (--i);
}

JZKey.h

#ifndef __JZKEY_H_
#define __JZKEY_H_

#include "YanShi.h"

void JZKey_Init();
unsigned char JZKEy_GetKeynum();

#endif

JZKey.c

#include "JZKey.h"

void JZKey_Init(){
	P32=1;
	P33=1;
	P34=0;
	P35=0;
	P42=0;
	P44=0;
}

unsigned char JZKEy_GetKeynum(){
	unsigned char key_num=0;
	if(P32==0){
		P32=0;
		P42=1;
		if(P42==0){
			Delay10ms();
			if(P42==0){
				key_num=9;
			}
			//while(P42==0);
		}
	}
	else if(P33==0){
		P33=0;
		P34=1;
		P35=1;
		P42=1;
		P44=1;
		if(P34==0){
			Delay10ms();
			if(P34==0){
				key_num=16;
			}
			//while(P34==0);
		}
		else if(P35==0){
			Delay10ms();
			if(P35==0){
				key_num=12;
			}
			//while(P35==0);
		}
		else if(P42==0){
			Delay10ms();
			if(P42==0){
				key_num=8;
			}
			//while(P42==0);
		}
		else if(P44==0){
			Delay10ms();
			if(P44==0){
				key_num=4;
			}
			//while(P44==0);
		}
	}
	JZKey_Init();
	return key_num;
}

CSB.h

#ifndef __CSB_H_
#define __CSB_H_

#include <STC15F2K60S2.H>
#include "intrins.h"

#define FS P10
#define JS P11

void Delay13us();
void CSB_FS_MC();
float CSB_GetJuLi();

#endif

CSB.c

#include "CSB.h"

void Delay13us()		//@12.000MHz
{
	unsigned char i;

	_nop_();
	_nop_();
	i = 36;
	while (--i);
}

void CSB_FS_MC(){
	unsigned char i;
	for(i=0;i<8;i++){
		FS=1;
		Delay13us();
		FS=0;
		Delay13us();
	}
}

float CSB_GetJuLi(){
	float ju_li;
	unsigned int time=0;
	AUXR |= 0x80;		//定时器时钟1T模式
	TMOD &= 0xF0;		//设置定时器模式
	TL0=0;
	TH0=0;
	ET0=0;
	TF0=0;
	
	CSB_FS_MC();
	TR0=1;
	while(JS==1&&TF0==0);
	TR0=0;
	if(JS==0&&TF0==0){
		time=((unsigned int)TH0<<8)|(unsigned int)TL0;
		ju_li=(time*1.0*0.017)/12.0;
	}
	else{
		ju_li=999.0;
		TF0=0;
	}
	TH0=0;
	TL0=0;
	return ju_li;
}

ChuanKou.h

#ifndef __CHUANKOU_H_
#define __CHUANKOU_H_

#include <STC15F2K60S2.H>

void ChuanKou_Init();
void SendData(unsigned char date);
void SendString(char *s);

#endif

ChuanKou.c

#include "ChuanKou.h"

void ChuanKou_Init(){
	SCON = 0x50;		//8位数据,可变波特率
	AUXR |= 0x40;		//定时器1时钟为Fosc,即1T
	AUXR &= 0xFE;		//串口1选择定时器1为波特率发生器
	TMOD &= 0x0F;		//设定定时器1为16位自动重装方式
	TL1 = 0xC7;		//设定定时初值
	TH1 = 0xFE;		//设定定时初值
	ET1 = 0;		//禁止定时器1中断
	TR1 = 1;		//启动定时器1
	ES=0;
	EA=1;
}

void SendData(unsigned char date){
	SBUF=date;
	while(TI==0);
	TI=0;
}

void SendString(unsigned char *s){
	while (*s!='\0'){//检测字符串结束标志
		SendData(*s++);//发送当前字符
	}
}

蓝桥杯单片机第14届省赛模拟程序题参考答案

题目

题目解析

串口初始化配置

源码

main.h

main.c

Init.h

Init.c

SMG.h

SMG.c

DSQ.h

DSQ.c

YanShi.h

YanShi.c

JZKey.h

JZKey.c

CSB.h

CSB.c

ChuanKou.h

ChuanKou.c

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