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#include<reg52.h> //#include "STC12c5A.h" //#include "1602.h" //#include "2402.h" #include "math.h" #define uchar unsigned char #define uint unsigned int typedef unsigned char BYTE; typedef unsigned int WORD; uchar code tablewei[]={0xfd,0xfb,0xf7,0xef};int shuzhi[4]={0}; /*Declare SFR associated with the ADC */ sfr ADC_CONTR = 0xBC; //ADC control register sfr ADC_RES = 0xBD; //ADC hight 8-bit result register sfr ADC_RESL = 0xBE; //ADC low 2-bit result register sfr P1M1=0x91; sfr P1M0=0x92; sfr P1ASF=0X9D; sfr EADC=0XB6; sfr AUXR1=0XA2; //sfr P1ASF = 0x9D; //P1 secondary function control register /*Define ADC operation const for ADC_CONTR*/ #define ADC_POWER 0x80 //ADC power control bit #define ADC_FLAG 0x10 //ADC complete flag #define ADC_START 0x08 //ADC start control bit #define ADC_SPEEDLL 0x00 //540 clocks #define ADC_SPEEDL 0x20 //360 clocks #define ADC_SPEEDH 0x40 //180 clocks #define ADC_SPEEDHH 0x60 //90 clocks //声明常量 #define ALCH 80 //醉驾标准80mg/L //K_MG_MV和K_ZERO为传感器校准系数，要根据每个MQ-3模块校准 #define K_MG_MV 160/60 //传感器灵敏度系数，可以自行校准 #define K_ZERO 0 //传感器零点漂移 //定义按键 sbit Key_Up = P3^2; sbit Key_Down = P3^3; //定义LED报警灯 sbit Led_Warn1 = P3^4; sbit Led_Warn2 = P3^5; //液晶 sbit RS=P2^7; sbit RW=P2^6; sbit E=P2^5; //蜂鸣器 sbit beep=P3^7; // 24C02 sbit SCL=P1^0; sbit SDA=P1^1; //定义乙醇传感器TTL电平输出引脚 sbit DOUT = P1^4; //定义标识 volatile bit FlagStartAL = 0; //开始转换标志 volatile bit FlagKeyPress = 0; //有键弹起标志 //全局变量定义 uchar Threshold; //酒精浓度上限报警值 uint ALCounter; //酒精转换计时器 int ALValue; //酒精测量值 float ALtemp; //计算临时变量 uint keyvalue, keyUp, keyDown; //键值 char * pSave; //EEPROM存盘用指针 //函数声明 void Data_Init(); void Timer0_Init(); void Port_Init(); void ADC_Init(); uchar GetADVal(); void KeyProcess(uint ); void DELAY(unsigned int t) { while(t!=0) t--; } /****************************** IIC DRIVE ******************************/ void IICStart(void) { SCL=0; DELAY(1); SDA=1; SCL=1; DELAY(1); SDA=0; DELAY(1); SCL=0; } void IICStop(void) { SDA=0;SCL=1; DELAY(1); SDA=1; DELAY(1); SCL=0; } void SEND0(void) { SDA=0; SCL=1; DELAY(1); SCL=0; } void SEND1(void) { SDA=1; DELAY(1); SCL=1; DELAY(1); SCL=0; } bit Check_Ack(void) { unsigned char errtime=250; DELAY(1); SCL=1; DELAY(1); CY=SDA; while(CY) { errtime--; CY=SDA; if (!errtime) { IICStop(); return 1; } } DELAY(1); SCL=0; return 0; } void Write_byte(unsigned char dat) { unsigned char i; for(i=0;i<8;i++) { if((dat<<i)&0x80) SEND1(); else SEND0(); } } unsigned char Read_byte(void) { unsigned char i,temp=0; for(i=0;i<8;i++) { SDA=1; SCL=1; DELAY(1); if(SDA==1) { temp=temp<<1; temp=temp|0x01; } else temp=temp<<1; SCL=0; } return temp; } /************************************ EEPROM DRIVE Addr:from 0x00--> *************************************/ unsigned char rdeeprom(unsigned char addr) { unsigned char temp=0; bit flag=0; IICStart(); Write_byte(0xa0); Check_Ack(); Write_byte(addr); Check_Ack(); IICStart(); Write_byte(0xa1); Check_Ack(); temp=Read_byte(); SEND1(); IICStop(); return temp; } void wrteeprom(unsigned char addr,unsigned char dat) { IICStart(); Write_byte(0xa0); Check_Ack(); Write_byte(addr); Check_Ack(); Write_byte(dat); Check_Ack(); IICStop(); } void delay() { int i,j; for(i=0; i<=10; i++) for(j=0; j<=2; j++); } uchar Convert(uchar In_Date) { /* uchar i, Out_Date = 0, temp = 0; for(i=0; i<8; i++) { temp = (In_Date >> i) & 0x01; Out_Date |= (temp << (7 - i)); } return Out_Date; */ return In_Date; } void enable(uchar del) { P0 = Convert(del); RS = 0; RW = 0; E = 0; delay(); E = 1; delay(); } void write(uchar del) { P0 = Convert(del); RS = 1; RW = 0; E = 0; delay(); E = 1; delay(); } void L1602_init(void) { enable(0x01); enable(0x38); enable(0x0c); enable(0x06); enable(0xd0); } void L1602_char(uchar hang,uchar lie,char sign) { uchar a; if(hang == 1) a = 0x80; if(hang == 2) a = 0xc0; a = a + lie - 1; enable(a); write(sign); } void L1602_string(uchar hang,uchar lie,uchar *p) { uchar a; if(hang == 1) a = 0x80; if(hang == 2) a = 0xc0; a = a + lie - 1; enable(a); while(1) { if(*p == '\0') break; write(*p); p++; } } //显示整型的温湿度数据用，共占用4位，其中一位符号位 void L1602_int(uchar hang, uchar lie, int num) { uint temp; uint gewei,shiwei,baiwei,sign; //首先将4位清空 L1602_char(hang, lie+0, ' '); L1602_char(hang, lie+1, ' '); L1602_char(hang, lie+2, ' '); L1602_char(hang, lie+3, ' '); if (num >= 0) { sign = 0; } else { sign = 1; } temp = abs(num); baiwei = temp / 100; temp = temp - baiwei*100; shiwei = temp / 10; gewei = temp - shiwei*10; num = abs(num); if (num>=100) { if (sign == 1) //负数 { L1602_char(hang, lie, '-'); } L1602_char(hang, lie+1, baiwei+48); L1602_char(hang, lie+2, shiwei+48); L1602_char(hang, lie+3, gewei+48); } else if (num>=10) { if (sign == 1) { L1602_char(hang, lie+1, '-'); } L1602_char(hang, lie+2, shiwei+48); L1602_char(hang, lie+3, gewei+48); } else { if (sign == 1) { L1602_char(hang, lie+2, '-'); } L1602_char(hang, lie+3, gewei+48); } } //数据初始化 void Data_Init() { ALCounter = 0; ALValue = 0; Led_Warn1 = 1; Led_Warn2 = 1; keyvalue = 0; keyUp = 1; keyDown = 1; beep=1; } //定时器0初始化，中断时间约2毫秒 //计算：晶振11.0592MHz，定时器时钟11059200/12=921600，每毫秒922个脉冲 // 16位定时器初值65536-1844=63692=0xf8cc void Timer0_Init() { ET0 = 1; //允许定时器0中断 TMOD = 1; //定时器工作方式选择 TL0 = 0xcc; // TH0 = 0xf8; //定时器赋予初值，大约为2毫秒中断1次 TR0 = 1; //启动定时器 } //定时器0中断 void Timer0_ISR (void) interrupt 1 using 0 { TL0 = 0xcc; TH0 = 0xf8; //定时器赋予初值 //每1秒钟启动一次AD转换 ALCounter ++; if (ALCounter >= 500) { FlagStartAL = 1; ALCounter = 0; } } //端口初始化 void Port_Init() { P1M0 = 0x80; //10000000，P1.7作为AD输入 P1M1 = 0x80; // } //ADC初始化 void ADC_Init() { uint i; P1ASF = 0x80; //设P1.7为AD输入 ADC_RES = 0; //清先前的结果 ADC_CONTR|=0x80; //POWER=1,打开ADC电源 for(i=5000;i>0;i--) ; //延时 ADC_CONTR = ADC_CONTR&0xE0; //1110,0000 清ADC_FLAG,ADC_START和低3位 ADC_CONTR = ADC_CONTR&0xf8|0x07; //设置当前通道号为P1.7 for(i=2500;i>0;i--) ; //延时 } //进行AD转换，得到当前酒精值 uchar GetADVal() { uint i; ADC_CONTR&=0xf7; for(i=250;i>0;i--); //待输入电压稳定后开始转换 //ADC_RES = 0; ADC_CONTR |= 0x08; /