[嵌入式]蓝桥杯单片机 第四届 自动售水系统（包含代码）

蓝桥杯第四届

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#ifndef _IIC_H
#define _IIC_H

//oˉêyéù?÷
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 ICC_read(unsigned char add);
#endif

/*
  3ìDò?μ?÷: IIC×ü???y?ˉ3ìDò
  èí?t?·?3: Keil uVision 4.10 
  ó2?t?·?3: CT107μ￥???ú×?o?êμ?μ??ì¨ 8051￡?12MHz
  è?    ?ú: 2011-8-9
*/

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

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


#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1

//×ü??òy???¨ò?
sbit SDA = P2^1;  /* êy?Y?? */
sbit SCL = P2^0;  /* ê±?ó?? */


//×ü?????ˉì??t
void IIC_Start(void)
{
	SDA = 1;
	SCL = 1;
	somenop;
	SDA = 0;
	somenop;
	SCL = 0;	
}

//×ü??í￡?1ì??t
void IIC_Stop(void)
{
	SDA = 0;
	SCL = 1;
	somenop;
	SDA = 1;
}

//ó|′e??????
void IIC_Ack(bit ackbit)
{
	if(ackbit) 
	{	
		SDA = 0;
	}
	else 
	{
		SDA = 1;
	}
	somenop;
	SCL = 1;
	somenop;
	SCL = 0;
	SDA = 1; 
	somenop;
}

//μè′yó|′e
bit IIC_WaitAck(void)
{
	SDA = 1;
	somenop;
	SCL = 1;
	somenop;
	if(SDA)    
	{   
		SCL = 0;
		IIC_Stop();
		return 0;
	}
	else  
	{ 
		SCL = 0;
		return 1;
	}
}

//í¨1yI2C×ü??·￠?íêy?Y
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;
	}
}

//′óI2C×ü??é??óê?êy?Y
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 ICC_read(unsigned char add)
{
	unsigned char temp;
	IIC_Start();
	IIC_SendByte(0x90);
	IIC_WaitAck();
	IIC_SendByte(add);
	IIC_WaitAck();
	IIC_Start();
	IIC_Start();
	IIC_SendByte(0x91);
	IIC_WaitAck();
	temp=IIC_RecByte();
	IIC_Start();
	return temp;
}

#include <reg52.h>
#include "iic.h" 
sbit S6=P3^1;
sbit S7=P3^0;
unsigned char code SMGNO_P[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
unsigned char guang;
void SMG();
unsigned char money=0;
unsigned char shuiliang=0;
unsigned char tt=0;
unsigned char yi=0,er=0,san=0,si=0;
void select573(unsigned char n)
{
	switch(n)
	{
		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 init()
{
	select573(4);
	P0=0xff;
	select573(5);
	P0=0x00;
	select573(6);
	P0=0xff;
	select573(7);
	P0=0xff;	
}

void SMG_bit(unsigned char pos,unsigned char dat)
{
	select573(6);
	P0=0x01<<pos;
	select573(7);
	P0=dat;
}
void delay(unsigned int t)
{
	unsigned int i,j;
	for(i=t;i>0;i--)
	for(j=110;j>0;j--);
}
void keydelay(unsigned int t)
{
	while(t--)
	{
		SMG();
	}
}
void initTime0()
{
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
}
void Time0()interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	tt++;
		if(tt==2)
		{
		shuiliang=shuiliang+1;  //??100ms,?ó0.01L??
			yi=shuiliang/1000;
			er=(shuiliang/100)%10;
			san=(shuiliang/10)%10;
			si=shuiliang%10;
		tt=0;
			if(shuiliang>9999)
			{
				select573(5);
				P0=0x00;
				money=shuiliang*0.5;
				shuiliang=0;
			}
		}
}
void keyscan()
{
	if(S7==0)
	{
		keydelay(5);
		if(S7==0)
		{
			TR0=1;
			select573(5);
			P0=0x10;
		}
		while(!S7);
	}
	else if(S6==0)
	{
		keydelay(5);
		if(S6==0)
		{
			TR0=0;
			select573(5);
			P0=0x00;
			money=shuiliang*0.5;
			yi=money/1000;
			er=(money/100)%10;
			san=(money/10)%10;
			si=money%10;
			shuiliang=0;
		}
		while(!S6);
	}
}
void SMG()
{
	SMG_bit(0,0xff);delay(10);
	SMG_bit(1,SMGNO_P[0]&0x7f);delay(10);
	SMG_bit(2,SMGNO_P[0]);delay(10);
	SMG_bit(3,SMGNO_P[5]);delay(10);
	SMG_bit(4,SMGNO_P[yi]);delay(10);
	SMG_bit(5,SMGNO_P[er]&0x7f);delay(10);
	SMG_bit(6,SMGNO_P[san]);delay(10);
	SMG_bit(7,SMGNO_P[si]);delay(10);
	select573(6);
	P0=0xff;
	select573(7);
	P0=0xff;
}
void main()
{
	init();
	initTime0();
	while(1)
	{

		guang=ICC_read(0x01);
		if(guang>64)
		{
			select573(4);
			P0=0xfe;
		}
		else 
		{
			select573(4);
			P0=0xff;
		}
		keyscan();
		   SMG();
	}
}