main.c

#include "main.h"unsigned char tab[13]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,0XBF,0XFF,0X8E}; unsigned char dsbuff[8]={11,11,11,11,11,11,11,11}; unsigned char com;bit key5 = 0,key7 = 0,key6 = 0;//0-測距顯示 1-回顯int key7_num; unsigned char distince; int ui_Sonic_flag; int history[10];//距離歷史數據 int num;//次數 int mangqu;//盲區 int result;//計算結果 int dis;//超聲波測距結果用于和盲區比較 int dac_num;//dac輸出bit over = 0,start = 0; bit option = 0;//操作 bit Sonic_flag;int led_count; bit led1_flag;//led1閃爍標志 int led_time;//led閃爍次數 bit led1,led7,led8;//led1 led7 led8標志位 int led1_count;void main(void) {EA = 1;all_init();Timer0Init();Timer1Init(); // eeprom_init();eeprom_read();mangqu = iic_read(0X00);Delay3ms();while(1){Key_Individual();Sonic_Proc();dac_out();if((key5 == 1))//數據回顯{eeprom_read();smg_display((key7_num+1)/10%10,(key7_num+1)/1%10,11,11,11,history[key7_num]/100%10,history[key7_num]/10%10,history[key7_num]/1%10);}else if((key6 == 1))//參數設置{smg_display(12,11,11,11,11,mangqu/100%10,mangqu/10%10,mangqu/1%10);}else if((key5 == 0)&&(key6 == 0)){distince_display();}if(over == 1){while(led_time < 10){if(led1_flag == 1){led_one(0XFE);}else if(led1_flag == 0){led_one(0XFF);}}if(led_time >= 10){led_time = 0;over = 0;}}} }void distince_display(void)//測距顯示界面 {if(option == 0)//顯示上一次測量數據{eeprom_read();if(num-2 < 0){result = history[num-2+10];}else if(num-2 >= 0) {result = history[num-2];}}else if(option == 1)顯示上一次測量與本次測量數據{eeprom_read();if(num-2 < 0){result = history[num-1+10]+history[num-2+10];}else if(num-2 >= 0){result = history[num-1]+history[num-2];}}smg_display(option,11,result/100%10,result/10%10,result/1%10,history[num-1]/100%10,history[num-1]/10%10,history[num-1]/1%10); }//全部初始化 void all_init(void) {P2 &=0X1F;P0=0XFF;P2 = ((P2&0X1F)|0X80);P2 &=0X1F;P0=0X00;P2 = ((P2&0X1F)|0XA0);P2 &=0X1F;P0=0XFF;P2 = ((P2&0X1F)|0XE0);P2 &=0X1F; }//數碼管顯示 void display(void) {P0 = 0XFF;P2 = ((P2&0X1F)|0XE0);P2 &= 0X1F;P0 = 0X01<<com;P2 = ((P2&0X1F)|0XC0);P2 &= 0X1F;P0 = tab[dsbuff[com]];P2 = ((P2&0X1F)|0XE0);P2 &= 0X1F;if(++com >= 8)com = 0; }//數碼管顯示函數 void smg_display(int s1,int s2,int s3,int s4,int s5,int s6,int s7,int s8) {dsbuff[0] = s1;dsbuff[1] = s2;dsbuff[2] = s3;dsbuff[3] = s4;dsbuff[4] = s5;dsbuff[5] = s6;dsbuff[6] = s7;dsbuff[7] = s8; }//獨立按鍵掃描 void Key_Individual(void) {P3 |= 0x0F;if(P3_LOW4 != 0x0F){Delay3ms();if(P3_LOW4 != 0x0F){switch(P3_LOW4){case 0x0E://S7if(key5 == 1)//回顯{if(++key7_num >= 10){key7_num = 0;}}else if(key5 == 0){key7_num = 0;}if(key6 == 1){mangqu+=10;if(mangqu > 90){mangqu = 0;}}if((key5 == 0) && (key6 == 0)){option = ~option;}while(P3_LOW4 == 0x0E);break;case 0x0D://S6//參數設置if(key5 == 0){key6 = ~key6;//1-參數設置if(key6 == 0){iic_write(0X00,mangqu);}}while(P3_LOW4 == 0x0D);break;case 0x0B://S5//數據回顯if(key6 == 0){over = 0;key5 = ~key5;}while(P3_LOW4 == 0x0B);break;case 0x07://S4if((key5 == 0) && (key6 == 0)){start = 1;//啟動測量}while(P3_LOW4 == 0x07);break;}}} }void dac_out(void) {if(mangqu >= dis)//輸出0v{pcf8951_dac(0);}else if(mangqu < dis){dac_num = (dis - mangqu)*0.02;if(dac_num > 5)//輸出5v{pcf8951_dac(255);}else {pcf8951_dac(dac_num*51/5);}} }void led_option(void)//1、7、8 {if(key6 == 1)//參數設置7亮{led_one(0XBF);}if(key5 == 1)//數據回顯8亮{led_one(0X7F);}else if((key5 == 0)&&(key6 == 0))//全滅{led_one(0XFF);} }//定時器 void Timer0Init(void) //12微秒@12.000MHz {AUXR &= 0x7F; //定時器時鐘12T模式TMOD &= 0xF0; //設置定時器模式TL0 = 0xF4; //設置定時初值TH0 = 0xFF; //設置定時初值TF0 = 0; //清除TF0標志TR0 = 0; //定時器0停止計時 }void Timer1Init(void) //2毫秒@11.0592MHz {AUXR |= 0x40; //定時器時鐘1T模式TMOD &= 0x0F; //設置定時器模式TL1 = 0x9A; //設置定時初值TH1 = 0xA9; //設置定時初值TF1 = 0; //清除TF1標志TR1 = 1; //定時器1開始計時ET1 = 1; }void timer1_isr() interrupt 3 {display();if(++ui_Sonic_flag == 50){ ui_Sonic_flag = 0; //超聲波刷新頻率 300ms一次Sonic_flag = 1;}if(++led_count >= 10){led_count = 0;led_option(); }if(over == 1){if(++led1_count >= 100){led1_count = 0;led1_flag = ~led1_flag;led_time++; }} }//超聲波//超聲波數據處理函數 unsigned char Sonic(void) {unsigned char Dist , s_num=10;TX = 0;Timer0Init();TR0 = 1; while(s_num--){while(!TF0); TX ^= 1; TF0 = 0; }TR0 = 0; TL0 = 0; TH0 = 0;TR0 = 1; while(RX && !TF0); TR0 = 0; if(TF0) { TF0 = 0;Dist = 0;}else{Dist = ((TH0<<8)+TL0)*0.017;}return Dist; }void Sonic_Proc(void) {if(start == 1){start = 0;distince = Sonic(); //測距iic_write(0x01+num,distince);Delay3ms();history[num] = iic_read(0x01+num);Delay3ms();dis = history[num];over = 1;if(++num >= 10){num = 0;}} }void eeprom_read(void) {int i;for(i=0;i<10;i++){history[i] = iic_read(0x01+i);Delay3ms();Delay3ms();} }//LED操作 void led_one(unsigned char dat)//單個LED操作 {P0 = dat;P2 = ((P2&0X1F)|0X80);P2 &= 0X1F; }

main.h

#ifndef _MAIN_H #define _MAIN_H #include "STC15F2K60S2.h" #include "iic.h"sbit TX = P1^0; //接收 sbit RX = P1^1; //發射 #define P3_LOW4 (P3&0x0F)void all_init(void); //全部初始化 void display(void); //數碼管顯示 void smg_display(int s1,int s2,int s3,int s4,int s5,int s6,int s7,int s8); void Key_Individual(void); //獨立按鍵掃描 void Timer0Init(void); //2毫秒@11.0592MHz void Timer1Init(void); //2微秒@11.0592MHz void Sonic_Proc(void); void distince_display(void); //測距顯示界面 void dac_out(void); void led_option(void);//1、7、8 void eeprom_read(void); void led_one(unsigned char dat);//單個LED操作#endif

iic.c

/*程序說明: IIC總線驅動程序軟件環境: Keil uVision 4.10 硬件環境: CT107單片機綜合實訓平臺(12MHz)日 期: 2011-8-9 */#include "iic.h"//總線啟動條件 void IIC_Start(void) {SDA = 1;SCL = 1;somenop;SDA = 0;somenop;SCL = 0; }//總線停止條件 void IIC_Stop(void) {SDA = 0;SCL = 1;somenop;SDA = 1; }//等待應答 bit IIC_WaitAck(void) {SDA = 1;somenop;SCL = 1;somenop;if(SDA) { SCL = 0;IIC_Stop();return 0;}else { SCL = 0;return 1;} }//通過I2C總線發送數據 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;} }//從I2C總線上接收數據 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; }void iic_write(unsigned char addr,unsigned char dat) {IIC_Start();IIC_SendByte(0XA0);IIC_WaitAck();IIC_SendByte(addr);IIC_WaitAck();IIC_SendByte(dat);IIC_WaitAck();IIC_Stop(); }unsigned char iic_read(unsigned char addr) {unsigned char temp;IIC_Start();IIC_SendByte(0XA0);IIC_WaitAck();IIC_SendByte(addr);IIC_WaitAck();IIC_Stop();IIC_Start();IIC_SendByte(0XA1);IIC_WaitAck();temp = IIC_RecByte();IIC_WaitAck();IIC_Stop();return temp; }void pcf8951_dac(unsigned char dat) {IIC_Start();IIC_SendByte(0X90);IIC_WaitAck();IIC_SendByte(0X40);IIC_WaitAck();IIC_SendByte(dat);IIC_WaitAck();IIC_Stop(); }//3ms延時 void Delay3ms() //@12.000MHz {unsigned char i, j;i = 36;j = 1;do{while (--j);} while (--i); }void eeprom_init(void) {int i;for( i = 0; i < 11;i++){iic_write(0x00+i,0);Delay3ms();} }

iic.h

#ifndef _IIC_H #define _IIC_H#include "STC15F2K60S2.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_();}#define SlaveAddrW 0xA0 #define SlaveAddrR 0xA1//總線引腳定義 sbit SDA = P2^1; /* 數據線 */ sbit SCL = P2^0; /* 時鐘線 *///函數聲明 void IIC_Start(void); void IIC_Stop(void); //void IIC_Ack(unsigned char ackbit); void IIC_SendByte(unsigned char byt); bit IIC_WaitAck(void); unsigned char IIC_RecByte(void); void iic_write(unsigned char addr,unsigned char dat);//eeprom寫操作 unsigned char iic_read(unsigned char addr);//eeprom讀操作 void pcf8951_dac(unsigned char dat);//pcf8951_dac輸出 void eeprom_init(void); void Delay3ms() ; //3ms延時#endif

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