【蓝桥杯-单片机省赛】第三届自动售水机

自己做的答案，疏漏之处在所难免，代码仅供参考

mian.c

#include "stc15f2k60s2.h"
#include "hc138.h"
#include "display.h"
#include "key.h"
#include "pcf8591.h"

void S6_display();
void S7_display();


void main(){
	unsigned char ad;
	init0();
	Timer2Init();
	while(1){		
	 	Key_Scan();
		ad=AD();
		if(_ope==1){//S7 ->L8亮
			
			S7_display();
			if(ad>64){
				hc138(4);
				P0=~0x80;
				P2&=0x1f;
						
			}
			else {
				hc138(4);
				P0=~0x81;
				P2&=0x1f;
	        }	
		
		}
		else if(_clo==1){//S6 ->L8灭

			
		   	S6_display();	   
			if(ad>64){
				hc138(4);
				P0=0xff;
				P2&=0x1f;
			}
			else {
				hc138(4);
				P0=~0x01;
				P2&=0x1f;
			}	
		}
	}	
}

void S7_display(){

	 smgdat[0]=21;
	 smgdat[1]=10;
	 smgdat[2]=5;
	 smgdat[3]=0;
	 smgdat[4]=water/1000;
	 smgdat[5]=(water%1000/100)+10;
	 smgdat[6]=water%100/10;
	 smgdat[7]=water%10;
	
}
void S6_display(){

   smgdat[0]=21;
   smgdat[1]=10;
   smgdat[2]=5;
   smgdat[3]=0;
   smgdat[4]=(int)water1/1000;
   smgdat[5]=((int)water1%1000/100)+10;
   smgdat[6]=(int)water1%100/10;
   smgdat[7]=(int)water1%10;/**/

}

hc138.c

#include "stc15f2k60s2.h"

void hc138(unsigned char channel){

	switch(channel){
		case 4:P2=(P2&0x1f)|0x80;break;
		case 5:P2=(P2&0x1f)|0xa0;break;
		case 6:P2=(P2&0x1f)|0xc0;break;
		case 7:P2=(P2&0x1f)|0xe0;break;
	
	}

}
void init0(){
	hc138(4);P0=0xff;
	hc138(5);P0=0x00;
	hc138(6);P0=0x00;
	hc138(7);P0=0xff;

}

display.c

#include "stc15f2k60s2.h"
#include "hc138.h"
#include "key.h"

unsigned char POS=0;
unsigned int water=0;
float water1;
unsigned int second=0;

unsigned char smgdat[8]={21,21,21,21,21,21,21,21};
unsigned char code SMG[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
						  0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10,
						  0xbf,0xff};



void Timer2Init(void)		//2毫秒@12.000MHz
{
	AUXR |= 0x04;		//定时器时钟1T模式
	T2L = 0x40;		//设置定时初值
	T2H = 0xA2;		//设置定时初值
	AUXR |= 0x10;		//定时器2开始计时


	/*后加的部分*/
	EA=1;
	IE2|=0x04;
}
void display(unsigned char pos,dat){

	hc138(6);P0=0x01<<pos;P2&=0x1f;
	hc138(7);P0=dat; P2&=0x1f;
}

void T2_Display()interrupt 12
{
	hc138(6);P0=0x00;
	display(POS,SMG[smgdat[POS]]);
	if(++POS==8)POS=0;


	if(_ope==1&&_clo==0)
		if(++second==500)
		{
			water+=1;
			second=0;
			if(water==9999){
				_ope=0;
				_clo=1;
				water1=water*0.5;
				water=0;	
			   hc138(5);P0=0x00;P2&=0x1f;
			}
		}
	
	

}

key.c

#include "stc15f2k60s2.h"
#include "hc138.h"
#include "display.h"



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

/*  1使能   */
bit _ope=0;
bit _clo=0;

void Delay5ms();

void Key_Scan(){

	if(S4==0){
		Delay5ms();
		if(S4==0){
			
		 	smgdat[0]=0;
		}
		while(!S4);
	}
	else if(S5==0){
		Delay5ms();
		if(S5==0){
			smgdat[2]=2;	
		}	
		while(!S5);
	}
	else if(S6==0){		   //close 
		Delay5ms();
		if(S6==0){
			_ope=0;
			_clo=1;
			water1=water*0.5;
			water=0;
			hc138(5);P0=0x00;P2&=0x1f;	
		}	
		while(!S6);
	}
	else if(S7==0){			//open
		Delay5ms();
		if(S7==0){
			_ope=1;
			_clo=0;
			hc138(5);P0=0x10;P2&=0x1f;	
		}	
		while(!S7);
	}
}
void Delay5ms()		//@12.000MHz
{
	unsigned char i, j;

	i = 59;
	j = 90;
	do
	{
		while (--j);
	} while (--i);
}

pcf8591.c

#include "stc15f2k60s2.h"
#include "iic.h"


unsigned char AD(){

   unsigned char temp;
   	EA=0;
	IIC_Start();
	IIC_SendByte(0x90);
	IIC_WaitAck();
	IIC_SendByte(1); //1 光敏电阻 3滑动变阻器
	IIC_WaitAck();
	
	IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	temp=IIC_RecByte();
	IIC_WaitAck();
	IIC_Stop();
	EA=1;
	return temp;
}

#### iic.c
````c


#include "reg52.h"
#include "intrins.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_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();}    


#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 */


//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;
}