蓝桥杯之单片机设计与开发（28）——2013_第四届_蓝桥杯_省赛——“模拟智能灌溉系统”

版权声明：让结局不留遗憾，让过程更加完美。 https://blog.csdn.net/Xiaomo_haa/article/details/88397501

昨天还在跟小傻子说不会同时用到DS1302、DS18B20、AD、E2PROM三个及以上模块，今天就被啪啪打脸。=，=

1、题目

虽然这个题用到了DS1302、AD、E2PROM等三个模块，但是真的很简单。我在调试的过程中，由于记错了蜂鸣器和继电器的控制管脚，导致这俩货一直不能正常工作，后来差了原理图才发现自己记错了。

蜂鸣器buzz是P06控制，继电器relay是P04控制。

2、代码

下载链接：https://download.csdn.net/download/xiaomo_haa/11012084

main.c

#include <stc15.h>
#include "sys.h"

bit mode = 1;			//0-手动模式，1-自动模式
bit flag_buzz = 1, flag_relay = 0;
bit flag_option = 0, flag_write = 0;
bit flag_100ms = 0;
u8 wet_value = 50, real_wet;
u8 Realtime[] = {0x19, 0x03, 0x11, 0x08, 0x30, 0x00, 0x02};

void main(void)
{
	static u8 index = 0;
	
	All_Init();
	InitDS1302();
	Timer0Init();
	
	if(Read_E2PROM(0) == 0x12)
		wet_value = Read_E2PROM(1);
	
	EA = 1;
	while(1)
	{
		if(flag_100ms)
		{
			flag_100ms = 0;
			
			//更新时间程序
			real_wet = Read_AIN(0x03);
			GetRealTime(Realtime);
			
			//写E2PROM程序
			if(flag_write == 1)
			{
				if(index == 0)
					Write_E2PROM(index, 0x12);
				else if(index == 1)
				{
					Write_E2PROM(index, wet_value);
					flag_write = 0;
					index = 0;
				}
				index ++;
			}
		}
		
		Key_press();
		Nixie_Show();
	}
}

sys.c

#include "sys.h"


void All_Init(void)
{
	P2 = (P2 & 0x1f) | 0x80;	//打开Y4C（LED）
	P0 = 0xff;			//关闭LED
	P2 = (P2 & 0x1f) | 0xe0;	//打开Y7C（数码管）
	P0 = 0xff;			//关闭数码管
	P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
	P0 = 0x00;			//关闭蜂鸣器、继电器
	P2 = P2 & 0x1f;			//关闭所有使能
}
	
void Timer0Init(void)		//2毫秒@11.0592MHz
{
	AUXR |= 0x80;		//定时器时钟1T模式
	TMOD &= 0xF0;		//设置定时器模式
	TL0 = 0x9A;		//设置定时初值
	TH0 = 0xA9;		//设置定时初值
	TF0 = 0;		//清除TF0标志
	TR0 = 1;		//定时器0开始计时
	ET0 = 1;
}

void Timer0(void) interrupt 1
{
	static u8 T0count1 = 0;
	
	//100ms定时程序
	T0count1 ++;
	if(T0count1 >= 50)			//100ms
	{
		T0count1 = 0;
		flag_100ms = 1;
	}
	
	if(flag_option == 0)
		Working_control();
	
	Nixie_Scan();
	Key_Scan();
}

void Working_control(void)
{	
	//手动模式继电器控制程序
	if((mode == 0) && (flag_relay == 1))
	{
		Led_illume(0xfe);
		P0 = 0x00;
		P04 = 1;			//打开继电器
		P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
		P2 = P2 & 0x1f;			//关闭所有使能
	}
	else if((mode == 0) && (flag_relay == 0))
	{
		Led_illume(0xff);
		P0 = 0x00;
		P04 = 0;			//关闭继电器
		P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
		P2 = P2 & 0x1f;			//关闭所有使能
	}
	
	//手动模式蜂鸣器控制程序
	if((real_wet < wet_value) && (flag_buzz == 1) && (mode == 0))
	{
		P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
		P06 = 1;			//打开蜂鸣器
		P2 = P2 & 0x1f;			//关闭所有使能
	}
	else if(((real_wet >= wet_value) || (flag_buzz == 0)) && (mode == 0))
	{
		P06 = 0;			//关闭蜂鸣器
		P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
		P2 = P2 & 0x1f;			//关闭所有使能
	}
	
	//自动模式继电器控制程序
	if((real_wet < wet_value) && (mode == 1))
	{
		Led_illume(0xfd);
		P0 = 0x00;
		P04 = 1;			//打开继电器
		P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
		P2 = P2 & 0x1f;			//关闭所有使能
	}
	else if((real_wet >= wet_value) && (mode == 1))
	{
		Led_illume(0xff);
		P0 = 0x00;
		P04 = 0;			//关闭继电器
		P2 = (P2 & 0x1f) | 0xa0;	//打开Y5C
		P2 = P2 & 0x1f;			//关闭所有使能
	}
}

sys.h

#ifndef _SYS_H_
#define _SYS_H_

typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;

#include <stc15.h>
#include <intrins.h>
#include "ds1302.h"
#include "iic.h"

extern bit mode;
extern bit flag_buzz, flag_relay;
extern bit flag_option, flag_write;
extern bit flag_100ms;
extern u8 wet_value, real_wet;
extern u8 Realtime[];


//function
void All_Init(void);
void Timer0Init(void);
void Working_control(void);

void Key_Scan(void);
void Key_drive(u8 key);
void Key_press(void);

void Nixie_Scan(void);
void Nixie_Show(void);
unsigned char BCDToNum(unsigned char bcd);
void Led_illume(u8 dat);

#endif

key.c

#include "sys.h"

u8 KeySta[] = {1, 1, 1, 1};			//键值存储区
u8 Keybackup[] = {1, 1, 1, 1};	//键值备份区

sbit S4 = P3^3;
sbit S5 = P3^2;
sbit S6 = P3^1;
sbit S7 = P3^0;

//按键扫描函数，在定时器中断里调用
void Key_Scan(void)
{
	static u8 Keybuff[] = {0xff, 0xff, 0xff, 0xff};	//按键缓冲区
	u8 i = 0;
	
	Keybuff[0] = (Keybuff[0] << 1) | S7;
	Keybuff[1] = (Keybuff[1] << 1) | S6;
	Keybuff[2] = (Keybuff[2] << 1) | S5;
	Keybuff[3] = (Keybuff[3] << 1) | S4;
	
	for(i = 0; i < 4; i++)
	{
		if(Keybuff[i] == 0xff)				//按键松开
			KeySta[i] = 1;
		else if(Keybuff[i] == 0x00)		//按键按下
			KeySta[i] = 0;
		else				//键值不稳定
		{}
	}
}

void Key_drive(u8 key)
{
	//手动模式
	if(mode == 0)	
	{
		if(key == 0)			//S7 切换工作状态
			mode = 1;
		else if(key == 1)	//S6 开关蜂鸣器
			flag_buzz = ~flag_buzz;
		else if(key == 2)	//S5 打开灌溉系统
			flag_relay = 1;
		else if(key == 3)	//S4 关闭灌溉系统
			flag_relay = 0;
	}
	
	//自动模式
	else if(mode == 1)
	{
		if(key == 0)			//切换工作状态
			mode = 0;
		else if(key == 1)	//S6 湿度阈值调整按键
		{
			if(flag_option == 0)			//进入设置模式
				flag_option = 1;
			else if(flag_option == 1)	//退出设置模式并写E2PROM
			{
				flag_option = 0;
				flag_write = 1;
			}
		}
		else if((key == 2) && (flag_option == 1))	//S5 +1
		{
			wet_value ++;
			if(wet_value >= 99)
				wet_value = 99;
		}
		else if((key == 3) && (flag_option == 1))	//S4 -1
		{
			wet_value --;
			if(wet_value <= 0)
				wet_value = 0;
		}
	}
}

//检测按键是否按下，在main函数调用
void Key_press(void)
{
	u8 i;
	
	for(i = 0; i < 4; i ++)
	{
		if(KeySta[i] != Keybackup[i])
		{
			if(Keybackup[i] != 0)		//按键松开时操作
				Key_drive(i);
			Keybackup[i] = KeySta[i];
		}
	}
}

display.c

#include "sys.h"

u8 code Nixie[] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 
		0x80, 0x90, 0x88, 0x83, 0xc6, 0xa1, 0x86, 0x8e, 
		0xff, 0xbf};	//共阳数码管码字
u8 NixieBuff[] = {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};	//数码管显示缓冲区，初值0xff确保启动时都不亮

u8 smg1,smg2,smg3,smg4,smg5,smg6,smg7,smg8;

//数码管显示
void Nixie_Scan(void)
{
	static u8 index = 0;
	
	P2 = (P2 & 0x1f) | 0xe0;	//数码管消隐
	P0 =0xff;
	
	P2 = (P2 & 0x1f) | 0xc0;	//数码管片选
	P0 = 0x01 << index;
	
	P2 = (P2 & 0x1f) | 0xe0;	//数码管段选
	P0 = NixieBuff[index];
	P2 &= 0x1f;
	index ++;
	index &= 0x07;
}

//数码管显示
void Nixie_Show(void)
{
	if(flag_option == 0)
	{
		smg1 = BCDToNum(Realtime[3]) / 10;
		smg2 = BCDToNum(Realtime[3]) % 10;
		if((BCDToNum(Realtime[5]) % 10) % 2 == 0)
			smg3 = 17;
		else
			smg3 = 16;
		smg4 = BCDToNum(Realtime[4]) / 10;
		smg5 = BCDToNum(Realtime[4]) % 10;
		smg6 = 16;
		smg7 = real_wet / 10;
		smg8 = real_wet % 10;
	}
	else if(flag_option == 1)
	{
		smg1 = smg2 = 17;
		smg3 = smg4 = smg5 = smg6 = 16;
		smg7 = wet_value / 10;
		smg8 = wet_value % 10;
	}
	
	NixieBuff[0] = Nixie[smg1];
	NixieBuff[1] = Nixie[smg2];
	NixieBuff[2] = Nixie[smg3];
	NixieBuff[3] = Nixie[smg4];
	NixieBuff[4] = Nixie[smg5];
	NixieBuff[5] = Nixie[smg6];
	NixieBuff[6] = Nixie[smg7];
	NixieBuff[7] = Nixie[smg8];
}

unsigned char BCDToNum(unsigned char bcd)
{
	unsigned char a, b;
	
	a = (bcd >> 4);
	b = bcd & 0x0f;
	
	return (a * 10 + b);
}

void Led_illume(u8 dat)
{
	P0 = 0xff;
	P2 = (P2 & 0x1f) | 0x80;	//打开Y4C（LED）
	P0 = dat;					//点亮LED
	P2 = P2 & 0x1f;
}

ds1302.c

#include "sys.h"

sbit DS1302_IO = P2^3;
sbit DS1302_CK = P1^7;
sbit DS1302_CE = P1^3;

void DS1302ByteWrite(unsigned char dat) 
{
	unsigned char mask;
	DS1302_IO = 1;					//拉低IO总线
	for(mask = 0x01; mask != 0; mask <<= 1)	//低位在前，逐位移出
	{
		if((dat&mask) != 0)		//首先输出该位数据
			DS1302_IO = 1;
		else
			DS1302_IO = 0;
		DS1302_CK = 1;				//拉高时钟线
		DS1302_CK = 0;				//拉低时钟线，完成一个位的操作
	}
	DS1302_IO = 1;  				//写完之后确保释放IO总线
}  

unsigned char DS1302ByteRead(void)
{
	unsigned char mask, dat = 0;
	
	for(mask = 0x01; mask != 0; mask <<= 1)	//低位在前，逐位读取
	{
		if(DS1302_IO)			//首先读取此时的IO引脚，并设置dat中的对应位
			dat |= mask;

		DS1302_CK = 1;		//拉高时钟
		DS1302_CK = 0;		//再拉低时钟，完成一个位的操作
	}
	return dat;					//返回读到的字节数据
} 

void DS1302SingleWrite(unsigned char reg, unsigned char dat)     
{
	DS1302_CE = 1;					//使能片选信号
	DS1302ByteWrite((reg << 1) | 0x80);	//发送写寄存器指令
	DS1302ByteWrite(dat);		//写入字节数据
	DS1302_CE = 0;					//除能片选信号
}

unsigned char DS1302SingleRead(unsigned char reg)
{
	unsigned char dat;
	
	DS1302_CE = 1;					//使能片选信号
	DS1302ByteWrite((reg << 1) | 0x81);	//发送读寄存器指令
	dat = DS1302ByteRead();	//读取字节数据
	DS1302_CE = 0;					//除能片选信号
	
	DS1302_IO = 0;					//单字节读必须加的！
	
	return dat;         
}

void DS1302BurstWrite(unsigned char *dat)
{
	unsigned char i;
	
	DS1302_CE = 1;
	DS1302ByteWrite(0xBE);				//发送突发写寄存器指令
	for(i = 0; i < 7; i ++)				//连续写入8字节数据
		DS1302ByteWrite(*dat++);        
	DS1302_CE = 0;      
}

void DS1302BurstRead (unsigned char *dat)
{
	unsigned char i;
	
	DS1302_CE = 1;
	DS1302ByteWrite(0xBF);				//发送突发读寄存器指令
	for(i = 0; i < 7; i++)				//连续读取8个字节
		dat[i] = DS1302ByteRead();      
	DS1302_CE = 0;  
	
	DS1302_IO = 0;								//突发读必须加
}	

void GetRealTime(unsigned char *time)
{
	unsigned char buf[8];
	
	DS1302BurstRead(buf);
	time[0] = buf[6];
	time[1] = buf[4];
	time[2] = buf[3];
	time[3] = buf[2];
	time[4] = buf[1];
	time[5] = buf[0];
	time[6] = buf[5];
}

void SetRealTime(unsigned char *time)
{
	unsigned char buf[8];
	
	buf[7] = 0;
	buf[6] = time[0];
	buf[4] = time[1];
	buf[3] = time[2];
	buf[2] = time[3];
	buf[1] = time[4];
	buf[0] = time[5];
	buf[5] = time[6];
	DS1302BurstWrite(buf);
}

void InitDS1302(void)
{
	unsigned char dat;
	signed char i = 7;
	unsigned char timeinit[8] = {0x19, 0x03, 0x11, 0x08, 0x30, 0x00, 0x02};
	
	DS1302_CE = 0;								//初始化DS1302通信引脚
	DS1302_CK = 0;
	dat = DS1302SingleRead(0);			//读取秒寄存器
	DS1302SingleWrite(7, 0x00);  	//撤销写保护以允许写入数据
	SetRealTime(&timeinit);					//设置DS1302时间
	DS1302SingleWrite(7, 0x80);  	//写保护以禁止写入数据
}

ds1302.h

#ifndef __DS1302_H
#define __DS1302_H

void DS1302ByteWrite(unsigned char dat);
unsigned char DS1302ByteRead(void);
void DS1302SingleWrite(unsigned char reg, unsigned char dat);
unsigned char DS1302SingleRead(unsigned char reg);
void DS1302BurstWrite(unsigned char *dat);
void DS1302BurstRead (unsigned char *dat);
void GetRealTime(unsigned char *time);
void SetRealTime(unsigned char *time);
void InitDS1302(void);

#endif

iic.c

#include "sys.h"

#define somenop {_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();}    

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

//总线启动条件
void IIC_Start(void)
{
	SDA = 1;
	SCL = 1;
	somenop;
	SDA = 0;
	somenop;
	SCL = 0;	
}

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

//应答位控制
void IIC_Ack(bit ackbit)
{
	if(ackbit) 
	{	
		SDA = 0;
	}
	else 
	{
		SDA = 1;
	}
	somenop;
	SCL = 1;
	somenop;
	SCL = 0;
	SDA = 1; 
	somenop;
}

//等待应答
bit IIC_WaitAck(void)
{
	SDA = 1;
	somenop;
	SCL = 1;
	somenop;
	if(SDA)    
	{   
		SCL = 0;
		IIC_Stop();
		return 0;
	}
	else  
	{ 
		SCL = 0;
		return 1;
	}
}

//通过I2C总线发送数据
void IIC_SendByte(unsigned char byt)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{   
		if(byt&0x80) 
		{	
			SDA = 1;
		}
		else 
		{
			SDA = 0;
		}
		somenop;
		SCL = 1;
		byt <<= 1;
		somenop;
		SCL = 0;
	}
}

//从I2C总线上接收数据
unsigned char IIC_RecByte(void)
{
	unsigned char da;
	unsigned char i;
	
	for(i=0;i<8;i++)
	{   
		SCL = 1;
		somenop;
		da <<= 1;
		if(SDA) 
		da |= 0x01;
		SCL = 0;
		somenop;
	}
	return da;
}

unsigned char Read_AIN(unsigned char chn)
{
	unsigned char dat, val;
	EA = 0;
	IIC_Start();						//IIC总线起始信号							
	IIC_SendByte(0x90);			//PCF8591的写设备地址		
	IIC_WaitAck();  		    //等待从机应答		
	IIC_SendByte(chn); 			//写入PCF8591的控制字节		
	IIC_WaitAck();  				//等待从机应答						
	IIC_Stop(); 						//IIC总线停止信号					
	
	IIC_Start();						//IIC总线起始信号									
	IIC_SendByte(0x91); 	  //PCF8591的读设备地址		
	IIC_WaitAck(); 			    //等待从机应答		
	dat = IIC_RecByte();	  //读取PCF8591通道3的数据 			
	IIC_Ack(0); 						//产生非应答信号				
	IIC_Stop(); 						//IIC总线停止信号		
	val = (dat * 50) / 255;
	val *= 2;
	EA = 1;
	
	if(val >= 100)
		val = 99;
	
	return val;	
}

void Write_E2PROM(unsigned char add, unsigned char dat)
{
	EA = 0;
  IIC_Start();
  IIC_SendByte(0xa0);	//发送器件地址
  IIC_WaitAck();
  IIC_SendByte(add);	//发送操作地址
  IIC_WaitAck();
  IIC_SendByte(dat);	//写一字节
  IIC_WaitAck();
  IIC_Stop();
  somenop;
	EA = 1;
}

unsigned char Read_E2PROM(unsigned char add)
{
  unsigned char d;
	
	IIC_Start();
	IIC_SendByte(0xa0); 	//发送器件地址
	IIC_WaitAck();
	IIC_SendByte(add);		//发送要操作的地址
	IIC_WaitAck();
	IIC_Stop();
	
	IIC_Start();
	IIC_SendByte(0xa1);		//发送读操作
	IIC_WaitAck();
	d = IIC_RecByte();	//读一字节
	IIC_Ack(0);
	IIC_Stop();
	return d;
}

iic.h

#ifndef _IIC_H
#define _IIC_H

//函数声明
void IIC_Start(void); 
void IIC_Stop(void);  
void IIC_Ack(bit ackbit); 
void IIC_SendByte(unsigned char byt); 
bit IIC_WaitAck(void);  
unsigned char IIC_RecByte(void); 
unsigned char Read_AIN(unsigned char chn);
void Write_E2PROM(unsigned char add, unsigned char dat);
unsigned char Read_E2PROM(unsigned char add);

#endif