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蓝桥杯省一之路06——第十二届省赛真题第二场

2022-04-23 16:41:00 【c语言的神】

一，代码部分

1，iic.c

/*
  程序说明: IIC总线驱动程序
  软件环境: Keil uVision 4.10 
  硬件环境: CT107单片机综合实训平台 8051，12MHz
  日    期: 2011-8-9
*/

#include "reg52.h"
#include "intrins.h"

#define DELAY_TIME 5

#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1

//总线引脚定义
sbit SDA = P2^1;  /* 数据线 */
sbit SCL = P2^0;  /* 时钟线 */

void IIC_Delay(unsigned char i)
{
    do{_nop_();}
    while(i--);        
}
//总线启动条件
void IIC_Start(void)
{
    SDA = 1;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 0;
    IIC_Delay(DELAY_TIME);
    SCL = 0;	
}

//总线停止条件
void IIC_Stop(void)
{
    SDA = 0;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}

//发送应答
void IIC_SendAck(bit ackbit)
{
    SCL = 0;
    SDA = ackbit;  					// 0：应答，1：非应答
    IIC_Delay(DELAY_TIME);
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SCL = 0; 
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}

//等待应答
bit IIC_WaitAck(void)
{
    bit ackbit;
	
    SCL  = 1;
    IIC_Delay(DELAY_TIME);
    ackbit = SDA;
    SCL = 0;
    IIC_Delay(DELAY_TIME);
    return ackbit;
}

//通过I2C总线发送数据
void IIC_SendByte(unsigned char byt)
{
    unsigned char i;

    for(i=0; i<8; i++)
    {
        SCL  = 0;
        IIC_Delay(DELAY_TIME);
        if(byt & 0x80) SDA  = 1;
        else SDA  = 0;
        IIC_Delay(DELAY_TIME);
        SCL = 1;
        byt <<= 1;
        IIC_Delay(DELAY_TIME);
    }
    SCL  = 0;  
}

//从I2C总线上接收数据
unsigned char IIC_RecByte(void)
{
    unsigned char i, da;
    for(i=0; i<8; i++)
    {   
    	SCL = 1;
	IIC_Delay(DELAY_TIME);
	da <<= 1;
	if(SDA) da |= 1;
	SCL = 0;
	IIC_Delay(DELAY_TIME);
    }
    return da;    
}

2,smgshow.c

#include "reg52.h"
void Delay(int t)
{
	while(t--);
}
void HC573(unsigned char channel, unsigned char dat)
{
	P0=dat;
	switch(channel)
	{
		case 4:
			P2=(P2 & 0x1f) | 0x80;//选通Y4C,LED
		  break;
		case 5:
			P2=(P2 & 0x1f) | 0xa0;//选通Y5C,蜂鸣器，继电器
		  break;
		case 6:
			P2=(P2 & 0x1f) | 0xc0;//选通Y6C,数码管位选
		  break;
		case 7:
			P2=(P2 & 0x1f) | 0xe0;//选通Y7C,数码管段码
		  break;
	}
	P2=(P2 & 0x1f) | 0x00;
}
void Display_SMG(unsigned char pos,unsigned char val)
{

	HC573(6,0x01<<pos);
	HC573(7,val);
	Delay(500);
//	HC573(6,0x01<<pos);
	HC573(7,0xff);//消隐
}	
void Display_ALL(unsigned char dat)
{
	HC573(6,0xff);
	HC573(7,dat);
}

3,main.c

#include "reg52.h"
#include "smgshow.h"
#include "iic.h"
sbit S4=P3^3;
sbit S5=P3^2;
sbit S6=P3^1;
sbit S7=P3^0;
unsigned char sta_smg=0;
unsigned char u_sta=0;
unsigned char switch_LED=0;
void Init_Timer()
{
	 TR1=1;
	 TR0=1;
	 TMOD=0x16;
	 TH0=0xff;
	 TL0=0xff;
	 TH1=(0-10000)/256;
	 TL1=(0-10000)%256;
	 EA=1;
	 ET0=1;
	 ET1=1;
} 
unsigned int t;
void Service_T0() interrupt 1
{
	t=t+1;
}
unsigned int count=0;
unsigned int count_key=0;
unsigned F_key=0;
unsigned int count_t=0;
unsigned int count_f=0;
unsigned int t_mem=65535;
float f;
void Service_T1() interrupt 3
{
	TH1=(0-10000)/256;
	TL1=(0-10000)%256;
	count+=1;
	if(count==100)
	{
		count=0;
		count_t=t;
		f=1.0/t;
		count_f=f*1000000;
		f=0;
		t=0;
	}
	if(F_key==1)
	{
		count_key+=1;
	}
}
float u_guanming=0; 
unsigned int u_guanming_smg;
void Read_guanming()
{
	unsigned char temp1;
	
	IIC_Start();
  IIC_SendByte(0x90);
	IIC_WaitAck();
  IIC_SendByte(0x01);
	IIC_WaitAck();

  IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	temp1=IIC_RecByte();//0~255
	IIC_SendAck(1); 
	IIC_Stop();  
	u_guanming=temp1*5/255.0;
	u_guanming_smg=u_guanming*100;
}
float u_dianweiqi=0; 
unsigned int u_dianweiqi_smg;
float u_mem=99;
void Read_dianweiqi()
{
	unsigned char temp2;
	
	IIC_Start();
  IIC_SendByte(0x90);
	IIC_WaitAck();
  IIC_SendByte(0x03);
	IIC_WaitAck();

  IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	temp2=IIC_RecByte();//0~255
	IIC_SendAck(1); 
	IIC_Stop();  
	u_dianweiqi=temp2*5/255.0;
	u_dianweiqi_smg=u_dianweiqi*100;
}
void SMGWork()
{
	switch(sta_smg)
	{
		case 0:
			Display_SMG(0,0x8e);
		  if(count_t>999999)
			{
				Display_SMG(1,SMGnotdotduanma[count_t/1000000%10]);
			}
			if(count_t>99999)
			{
				Display_SMG(2,SMGnotdotduanma[count_t/100000%10]);
			}
			if(count_t>9999)
			{
				Display_SMG(3,SMGnotdotduanma[count_t/10000%10]);
			}
			if(count_t>999)
			{
				Display_SMG(4,SMGnotdotduanma[count_t/1000%10]);
			}
			if(count_t>99)
			{
				Display_SMG(5,SMGnotdotduanma[count_t/100%10]);
			}
			if(count_t>9)
			{
				Display_SMG(6,SMGnotdotduanma[count_t/10%10]);
			}
		  	Display_SMG(7,SMGnotdotduanma[count_t%10]);  
		  break;
			case 1:
			  Display_SMG(0,0xc8);
		    if(count_f>999999)
				{
					Display_SMG(1,SMGnotdotduanma[count_f/1000000]);
				}
				if(count_f>99999)
				{
					Display_SMG(2,SMGnotdotduanma[count_f/100000%10]);
				}
				if(count_f>9999)
				{
					Display_SMG(3,SMGnotdotduanma[count_f/10000%10]);
				}
				if(count_f>999)
				{
					Display_SMG(4,SMGnotdotduanma[count_f/1000%10]);
				}
				if(count_f>99)
				{
					Display_SMG(5,SMGnotdotduanma[count_f/100%10]);
				}
				if(count_f>9)
				{
					Display_SMG(6,SMGnotdotduanma[count_f/10%10]);
				}
				Display_SMG(7,SMGnotdotduanma[count_f%10]);
			break;
			case 2:
				Display_SMG(0,0xc1);
			  Display_SMG(1,~0x40);
			if(u_sta==0)
			{
			  Display_SMG(2,SMGnotdotduanma[1]);
			  Display_SMG(5,SMGdotduanma[u_guanming_smg/100%10]);
			  Display_SMG(6,SMGnotdotduanma[u_guanming_smg/10%10]);
        Display_SMG(7,SMGnotdotduanma[u_guanming_smg%10]);
			}
			else
			{
				Display_SMG(2,SMGnotdotduanma[3]);
			  Display_SMG(5,SMGdotduanma[u_dianweiqi_smg/100%10]);
			  Display_SMG(6,SMGnotdotduanma[u_dianweiqi_smg/10%10]);
        Display_SMG(7,SMGnotdotduanma[u_dianweiqi_smg%10]);
			}
		  break;	
	}
}
void Scan_key()
{
	if(S4==0)
	{
		Delay(500);
		if(S4==0)
		{
			if(sta_smg==0)
			{
				sta_smg=1;
				
			}
			else if(sta_smg==1)
			{
				sta_smg=2;
				u_sta=0;
			}
			else 
			{
				sta_smg=0;
			}
			while(S4==0)
			{
				SMGWork();
			}
		}
	}
	if(S5==0)
	{
		Delay(500);
		if(S5==0)
		{
			if(sta_smg==2 && u_sta==0)
			{
			    u_sta=1;
			}
			else if(sta_smg==2 && u_sta==1)
			{
				  u_sta=0;
			}
			while(S5==0)
			{
				SMGWork();
			}
		}
	}
	if(S6==0)
	{
		Delay(500);
		if(S6==0)
		{
			 Read_dianweiqi();
			 u_mem=u_dianweiqi;
		}
		while(S6==0)
		{
			SMGWork();
		}
	}
	if(S7==0)
	{
		Delay(500);
		if(S7==0)
		{
			F_key=1;
			count_key=0;
	
			while(S7==0)
		{
			SMGWork();
		}
		  F_key=0;
		if(count_key>100)
		{
			switch_LED =! switch_LED;
		}
			else
			{
				t_mem=count_t;
			}
			
		}
	}
}
unsigned char sta_LED=0xff;
void LED()
{
	if(switch_LED==0)
	{	
		if(sta_smg != 2)
		Read_dianweiqi();
		
	if(u_dianweiqi>u_mem)
	{
		sta_LED &= ~0x01;
		HC573(4,sta_LED);
	}
	else
	{
		sta_LED |= 0x01;
		HC573(4,sta_LED);
	}
	
	if(count_t>t_mem)
	{
		sta_LED &= ~0x02;
		HC573(4,sta_LED);
	}
	else
	{
		sta_LED |= 0x02;
		HC573(4,sta_LED);
	}
	if(sta_smg==0)
	{
		sta_LED &= ~0x04;
		HC573(4,sta_LED);
	}
	else
	{
		sta_LED |= 0x04;
		HC573(4,sta_LED);
	}
	if(sta_smg==1)
	{
		sta_LED &= ~0x08;
		HC573(4,sta_LED);
	}
	else
	{
		sta_LED |= 0x08;
		HC573(4,sta_LED);
	}
	if(sta_smg==2)
	{
		sta_LED &= ~0x10;
		HC573(4,sta_LED);
	}
	else
	{
		sta_LED |= 0x10;
		HC573(4,sta_LED);
	}
}
	else
	{
		sta_LED=0xff;
		HC573(4,sta_LED);
	}
}
void Init_system()
{
	HC573(4,0xff);
	HC573(5,0x00);
	Display_ALL(0xff);
}
void main()
{
	Init_system();
	Init_Timer();
	while(1)
	{
	 if(u_sta==0)
		{
		Read_guanming();
		Delay(100);
		}
	 else
		{
		Read_dianweiqi();
			Delay(100);
		}
		SMGWork();
		Scan_key();
		LED();
	}
}

第十二届第二场除了通道三实时电压大于缓存电压时L1亮起，只能在电压采集U-3界面实现（题目并没有说的很清楚，个人理解时在全界面有效）。这个问题的出现的原因是，我把读通道一和通道三的2个函数同时放在循环中读取，我发现读取的数值会混乱，本该显示通道一的电压结果显示出通道三，读取通道三会显示出通道一，有大佬路过可以帮忙答疑下。主要觉得自己把电压读取跟显示函数捆绑在一起了，只有在显示该通道时才读取该通道的电压，这几天尝试过很多新写法，不太理想，后续在进行优化。

在这道题目还学习到了如何判断按键的长按与短按，思路为在按下开关时，标志位置1（记住要让计数为清0，便于下一次计数），要设置while（）循环，判断开关按下，便于定时器开始计时，每10ms计数位+1，判断计数位的时间来决定执行的内容。

二，总结

       看了前面代码的朋友，应该会发现引用的头文件少了，因为最近写代码发现模块化太多的时候要定义很多的变量去接收，修改这些数值，太过繁琐，而且自身的编程水平太低无法做到对应的模块化有很强的移植性。

        这几天才完成了这道题，刷题最重要的是能在一道题目学习到什么，而不是一味的一天一道，能学习到新知识才是最重要的，共勉。

版权声明
本文为[c语言的神]所创，转载请带上原文链接，感谢
https://blog.csdn.net/weixin_58931449/article/details/124346337

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