十五届蓝桥杯省赛真题及代码

已于 2024-04-29 17:34:16 修改
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文章标签： 蓝桥杯 职场和发展
于 2024-04-22 20:55:38 首次发布
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本文链接：https://blog.youkuaiyun.com/Strider_Ma/article/details/137743163
版权
该博客分享了十五届蓝桥杯省赛真题及代码，涉及main.c、Timer.c等多个文件，不过提到LED部分可能存在问题。此外，博主表示省赛成绩为省二前几名，突击失败。

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十五届蓝桥杯省赛真题及代码

LED部分可能有点问题

程序设计题：

代码如下：

main.c:

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


#include "Timer.h"
#include "bsp_init.h"
#include "bsp_ds1302.h"
#include "bsp_iic.h"
#include "bsp_key.h"
#include "bsp_led.h"
#include "bsp_NE555.h"
#include "bsp_seg.h"

void Key_Proc();
void Seg_Proc();
void Led_Proc();


unsigned int Key_Slow_Down=0;
unsigned int Seg_Slow_Down=0;
unsigned int Led_Slow_Down=0;

unsigned long ms_tick=0;

unsigned char Key_Value,Key_Down,Key_Old;

unsigned char seg_buf[8]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
unsigned char seg_string[10];
unsigned char pos;

unsigned char ucled=0xff;

//ds1302
unsigned char Rtc[3]={23,59,55};
unsigned char max_freq_hour=0;
unsigned char max_freq_min=0;
unsigned char max_freq_sec=0;
//555
int freq=0;
int max_freq=0;
int beyond_freq=2000;
int fix_freq=0;
int fixed_freq=0;

//DAC
float k=0;
float b=0;
unsigned char dac=0;


unsigned char screen_flag=1;//1是频率，2是参数，3是时间，4是回显

unsigned char screen_set_num=1;//参数设置切换
unsigned char screen_back=1;//回显设置切换


void main()
{
	Cls();
	Timer1Init();
	EA=1;
	NE555_Timer0Init();
	Set_Rtc(Rtc);
	//Led_Disp(ucled);
	while(1)
	{
		Key_Proc();
		Seg_Proc();
		Led_Proc();
	}
}

void tm0_isr() interrupt 3
{
    ms_tick++;
	
	if(++Key_Slow_Down==10) Key_Slow_Down=0;
	if(++Seg_Slow_Down==80) Seg_Slow_Down=0;
	if(++Led_Slow_Down==80) Led_Slow_Down=0;
	
	if((ms_tick%1000)==0)
	{
		freq=((TH0<<8)|TL0);
		TH0=0;
		TL0=0;
	}
	
	Seg_Disp(seg_buf,pos);
	if(++pos==8) pos=0;
	
	Led_Disp(ucled);
}

void Key_Proc()
{
	if(Key_Slow_Down) return;
	Key_Slow_Down=1;
	
	//
	Key_Value=Key_Read();
	Key_Down=Key_Value&(Key_Value^Key_Old);
	Key_Old=Key_Value;
	
	switch(Key_Down)
	{
		case 4:
			if(++screen_flag==5) screen_flag=1;;
			break;
		case 5:
			if(screen_flag==2) 
			{
				if(++screen_set_num==3)
				 screen_set_num=1;
			}
			if(screen_flag==4) 
			{
				if(++screen_back==3)
				 screen_back=1;
			}
			break;
		case 8:
			if(screen_set_num==1) //超限
			{
				beyond_freq+=2000;
				if(beyond_freq==10000) beyond_freq=9000;
			}
			else if(screen_set_num==2) //校准
			{
				fix_freq+=200;
				if(fix_freq==1000) fix_freq=900;
			}
		case 9:
			if(screen_set_num==1) //超限
			{
				beyond_freq-=1000;
				if(beyond_freq==0) beyond_freq=1000;
			}
			else if(screen_set_num==2) //校准
			{
				fix_freq-=100;
				if(fix_freq==-1000) fix_freq=-900;
			}
	}
}

void Seg_Proc()
{
	if(Seg_Slow_Down) return;
	Seg_Slow_Down=1;
	
	
	/*数据采集*/
	fixed_freq = freq+fix_freq;
	if(fixed_freq>max_freq)//最大频率
	{
		max_freq=fixed_freq;
		Read_Rtc(Rtc);
		max_freq_hour=Rtc[0];
		max_freq_min=Rtc[1];
		max_freq_sec=Rtc[2];
		
	}
		
	/*DAC*/
	if(fixed_freq<beyond_freq)
	dac=((4/((float)beyond_freq-500.0))*fixed_freq+(1-(2000/((float)beyond_freq-500))))*51;
	else if(fixed_freq<0)
	{
		dac=0;
	}
	Pcf8591_Dac(dac);
	
	/*显示区*/
	
	
	
	if(screen_flag==1)//频率界面
	{
		if(fixed_freq>0)
		{
			sprintf(seg_string,"F  %5d",fixed_freq);
			
		}
		else {
			sprintf(seg_string,"F     LL");
			//ucled&=(~0x02);
			//ucled|=0x02;
		};
	}
	else if(screen_flag==2)//参数界面
	{
		if(screen_set_num==1)//超限
		  sprintf(seg_string,"P1  %4d",beyond_freq);
		else //校准
		{
			sprintf(seg_string,"P2  %4d",fix_freq);
		}
	}
	else if(screen_flag==3)//时间界面
	{
		Read_Rtc(Rtc);
		sprintf(seg_string,"%02d-%02d-%02d",(unsigned int)Rtc[0],(unsigned int)Rtc[1],(unsigned int)Rtc[2]);
	}
	else if(screen_flag==4)//回显界面
	{
		if(screen_back==1)
		  sprintf(seg_string,"HF %5d",max_freq);
		else
		{
			sprintf(seg_string,"HA%02d%02d%02d",(unsigned int)max_freq_hour,(unsigned int)max_freq_min,(unsigned int)max_freq_sec);
		}
	}
	
	Seg_Tran(seg_string,seg_buf);
}

void Led_Proc()
{
	if(Led_Slow_Down) return;
	Led_Slow_Down=1;
	
    if((screen_flag==1)&&(fix_freq<beyond_freq))
	{
		ucled&=0x01;
		ucled^=0x01;
		if(fix_freq<0)
			ucled|=0x02;
	}
	else if(fix_freq<0)
	{
		ucled&=0x02;
		ucled|=0x02;
	}
	else if((screen_flag!=1)&&(fix_freq>beyond_freq))ucled&=0xfe;
	else 
	{
		ucled&=0x02;
		ucled^=0x02;
		if(fix_freq<0)
			ucled|=0x02;
	}

	
}

Timer.c

#include "Timer.h"

void Timer1Init(void)		//1毫秒@12.000MHz
{
	AUXR &= 0xBF;		//定时器时钟12T模式
	TMOD &= 0x0F;		//设置定时器模式
	TL1 = 0x18;		//设置定时初值
	TH1 = 0xFC;		//设置定时初值
	TF1 = 0;		//清除TF1标志
	TR1 = 1;		//定时器1开始计时
	
	ET1=1;
}

bsp_init.c

#include "bsp_init.h"


void Cls()
{
	P0=0xff;//LED
	P2=P2&0x1f|0x80;
	P2&=0x1f;
	
	P0=0x00;//relay
	P2=P2&0x1f|0xa0;
	P2&=0x1f;
	
}

bsp_ds1302.c

/*	# 	DS1302代码片段说明
	1. 	本文件夹中提供的驱动代码供参赛选手完成程序设计参考。
	2. 	参赛选手可以自行编写相关代码或以该代码为基础，根据所选单片机类型、运行速度和试题
		中对单片机时钟频率的要求，进行代码调试和修改。
*/				
#include "intrins.h"
#include "bsp_ds1302.h"
sbit SCK = P1^7;
sbit SDA = P2^3;
sbit RST =P1^3;
//
void Write_Ds1302(unsigned  char temp) 
{
	unsigned char i;
	for (i=0;i<8;i++)     	
	{ 
		SCK = 0;
		SDA = temp&0x01;
		temp>>=1; 
		SCK=1;
	}
}   

//
void Write_Ds1302_Byte( unsigned char address,unsigned char dat )     
{
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1; 	_nop_();  
 	Write_Ds1302(address);	
 	Write_Ds1302(dat);		
 	RST=0; 
}

//
unsigned char Read_Ds1302_Byte ( unsigned char address )
{
 	unsigned char i,temp=0x00;
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
 	RST=1;	_nop_();
 	Write_Ds1302(address);
 	for (i=0;i<8;i++) 	
 	{		
		SCK=0;
		temp>>=1;	
 		if(SDA)
 		temp|=0x80;	
 		SCK=1;
	} 
 	RST=0;	_nop_();
 	SCK=0;	_nop_();
	SCK=1;	_nop_();
	SDA=0;	_nop_();
	SDA=1;	_nop_();
	return (temp);			
}

void Set_Rtc(unsigned char *Rtc)
{
	unsigned char temp;
	Write_Ds1302_Byte(0x8e,0);
	
	temp=(((Rtc[0]/10)<<4)|(Rtc[0]%10));
	Write_Ds1302_Byte(0x84,temp);
	temp=(((Rtc[1]/10)<<4)|(Rtc[1]%10));
	Write_Ds1302_Byte(0x82,temp);
	temp=(((Rtc[2]/10)<<4)|(Rtc[2]%10));
	Write_Ds1302_Byte(0x80,temp);
	
	Write_Ds1302_Byte(0x8e,0x80);
}


void Read_Rtc(unsigned char *Rtc)
{
	unsigned char temp;
	temp=Read_Ds1302_Byte(0x85);
	Rtc[0]=(((temp>>4)*10)+((temp&0x0f)));
	
	temp=Read_Ds1302_Byte(0x83);
	Rtc[1]=(((temp>>4)*10)+((temp&0x0f)));
	
	temp=Read_Ds1302_Byte(0x81);
	Rtc[2]=(((temp>>4)*10)+((temp&0x0f)));
}

bsp_iic.c

/*	#   I2C代码片段说明
	1. 	本文件夹中提供的驱动代码供参赛选手完成程序设计参考。
	2. 	参赛选手可以自行编写相关代码或以该代码为基础，根据所选单片机类型、运行速度和试题
		中对单片机时钟频率的要求，进行代码调试和修改。
*/
#include "bsp_iic.h"
#include "intrins.h"
#define DELAY_TIME	5
sbit sda=P2^1;
sbit scl=P2^0;
//
static void I2C_Delay(unsigned char n)
{
    do
    {
        _nop_();
    }
    while(n--);      	
}

//
void I2CStart(void)
{
    sda = 1;
    scl = 1;
	I2C_Delay(DELAY_TIME);
    sda = 0;
	I2C_Delay(DELAY_TIME);
    scl = 0;    
}

//
void I2CStop(void)
{
    sda = 0;
    scl = 1;
	I2C_Delay(DELAY_TIME);
    sda = 1;
	I2C_Delay(DELAY_TIME);
}

//
void I2CSendByte(unsigned char byt)
{
    unsigned char i;
	
    for(i=0; i<8; i++){
        scl = 0;
		I2C_Delay(DELAY_TIME);
        if(byt & 0x80){
            sda = 1;
        }
        else{
            sda = 0;
        }
		I2C_Delay(DELAY_TIME);
        scl = 1;
        byt <<= 1;
		I2C_Delay(DELAY_TIME);
    }
	
    scl = 0;  
}

//
//unsigned char I2CReceiveByte(void)
//{
//	unsigned char da;
//	unsigned char i;
//	for(i=0;i<8;i++){   
//		scl = 1;
//		I2C_Delay(DELAY_TIME);
//		da <<= 1;
//		if(sda) 
//			da |= 0x01;
//		scl = 0;
//		I2C_Delay(DELAY_TIME);
//	}
//	return da;    
//}

//
unsigned char I2CWaitAck(void)
{
	unsigned char ackbit;
	
    scl = 1;
	I2C_Delay(DELAY_TIME);
    ackbit = sda; 
    scl = 0;
	I2C_Delay(DELAY_TIME);
	
	return ackbit;
}

//
void I2CSendAck(unsigned char ackbit)
{
    scl = 0;
    sda = ackbit; 
	I2C_Delay(DELAY_TIME);
    scl = 1;
	I2C_Delay(DELAY_TIME);
    scl = 0; 
	sda = 1;
	I2C_Delay(DELAY_TIME);
}


//=======Pcf8591=================


void Pcf8591_Dac(unsigned char dat)
{
	I2CStart();
	I2CSendByte(0x90);
	I2CWaitAck();
	
	I2CSendByte(0x41);
	I2CWaitAck();
	
	I2CSendByte(dat);
	I2CSendAck(1);
	I2CStop();
}

bsp_key.c

#include "bsp_key.h"

unsigned char Key_Read()
{
	unsigned char Key_Value;
	unsigned int temp;
	P44=0;P42=1;//P35=1;//P34=1;
	temp=P3&0x0c;
	P44=1;P42=0;//P35=1;//P34=1;
	temp=((temp<<4)|(P3&0x0c));
	
	switch(temp)
	{
		case 0x4c: Key_Value= 4;break;
		case 0x8c: Key_Value= 5;break;
		
		case 0xc4: Key_Value= 8;break;
		case 0xc8: Key_Value= 9;break;
		
		default:Key_Value= 0;break;
	}
	
	return Key_Value;
}

bsp_led.c

#include "bsp_led.h"

void Led_Disp(unsigned char ucled)
{
	P0=(~ucled);//LED
	P2=P2&0x1f|0x80;
	P2&=0x1f;
}

NE_555.c

#include "bsp_NE555.h"

void NE555_Timer0Init(void)		//1毫秒@12.000MHz
{

	TMOD &= 0xF0;		//设置定时器模式
	TMOD |= 0x05;		//设置定时器模式
	TL0 = 0;		//设置定时初值
	TH0 = 0;		//设置定时初值

	TR0 = 1;		//定时器0开始计时
}

bsp_seg.c

#include "bsp_seg.h"


void Seg_Disp(unsigned char *seg_buf,unsigned char pos)
{
	P0=1<<pos;//LED
	P2=P2&0x1f|0xc0;
	P2&=0x1f;
	
	P0=0xff;//消影
	P2=P2&0x1f|0xe0;
	P2&=0x1f;
	
	P0=seg_buf[pos];//数码
	P2=P2&0x1f|0xe0;
	P2&=0x1f;
}

void Seg_Tran(unsigned char* seg_string,unsigned char *seg_buf)
	
{
	unsigned char i=0;
	unsigned char j=0;
	unsigned char temp;
	for(i=0;i<=7;i++,j++)
	{
		switch(seg_string[j])
		{
			case '0':temp=0xc0;break;
			case '1':temp=0xf9;break;
			case '2':temp=0xa4;break;
			case '3':temp=0xb0;break;
			case '4':temp=0x99;break;
			case '5':temp=0x92;break;
			case '6':temp=0x82;break;
			case '7':temp=0xf8;break;
			case '8':temp=0x80;break;
			case '9':temp=0x90;break;
			
			case 'A':temp=0x88;break;
			case 'F':temp=0x8e;break;
			case 'H':temp=0x89;break;
			case 'L':temp=0xC7;break;
			case 'N':temp=0xC8;break;
			case 'P':temp=0x8C;break;
			case 'U':temp=0xC1;break;

			
			case '-':temp=0xBF;break;
			case ' ':temp=0xFF;break;
			
			default:temp=0xff;break;
		}
		if(seg_string[j+1]=='.')
		{
			temp&=0x7f;
			j++;
		}
		seg_buf[i]=temp;
	}
}

==================================2024-04-14==============================

寄了，省二前几名，突击失败

==================================2024-04-29==============================

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