基于单片机的天然气气体泄露警报器设计

#include "timer.h" #include "lcd.h" #include "ds1302.h" #include "dht11.h" u8 year_shi,year_ge; u8 month_shi,month_ge; u8 day_shi,day_ge; u8 hour_shi,hour_ge; u8 min_shi,min_ge; u8 sec_shi,sec_ge; u8 smogH = 50; u8 flag_receive = 0; uchar set_flag = 0; u8 set_time_flag = 0; unsigned char idata year_flag = 0; unsigned char idata month_flag = 0; unsigned char idata day_flag = 0; unsigned char idata hour_flag = 0; unsigned char idata min_flag = 0; unsigned char idata sec_flag = 0; unsigned char idata year_sub_flag = 0; unsigned char idata month_sub_flag = 0; unsigned char idata day_sub_flag = 0; unsigned char idata hour_sub_flag = 0; unsigned char idata min_sub_flag = 0; unsigned char idata sec_sub_flag = 0; u8 key_state = 0; u8 display_change = 0; //----------------------------------------------- /* define constants */ #define FOSC 11059200L #define T1MS (65536-FOSC/12/1000) //1ms timer calculation method in 12T mode /* define variables */ uint count = 20; //按键扫描函数 //**************************************************** unsigned char key_scan(void) { if(key_set == 0 || key1 == 0 || key2 == 0 || key3 == 0) { delay_ms(15); if(key_set == 0) {while(!key_set); return 1;} else if(key1 == 0) {while(!key1); return 2;} else if(key2 == 0) {while(!key2); return 3;} else if(key3 == 0) {while(!key3); return 4;} } return 0; } void timer_init(void) { TMOD |= 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch } /* Timer0 interrupt routine */ void tm0_isr() interrupt 1 { u8 key = 0; static u16 time_num = 0; TL0 = T1MS; //reload timer0 low byte TH0 = T1MS >> 8; //reload timer0 high byte time_num++; TR0 = 0; // if(time_num >= 1000) // { // DHT11_Read_Data(&temp,&humi); // LcdDisplayString(8, 0, rec_dat); // time_num = 0; // } if (count-- == 0) //1ms * 1000 -> 1s { count = 2; //reset counter key = key_scan(); //按键扫描，判断哪个按键被按下 if(key == 1) { set_flag++; if(set_flag >= 3) set_flag = 0; display_change = 1; //清屏 } if(set_flag == 1) /* 1：调时间 2：调MQ4阈值 */ { if(key == 2) { set_time_flag++; if(set_time_flag >= 7) { set_time_flag = 0; } } switch(set_time_flag) { case 1: if(key == 3) { year_shi = TIME[6]/16; //十位 year_ge = ((TIME[6])&0x0f); //个位 if(year_flag == 0) { if(year_shi == 0x09 && year_ge == 0x09) { TIME[6] = 0x99; } else { if(year_ge == 0x09) { year_flag = 1; } else TIME[6]+=1; } } if(year_flag == 1) { if(year_shi == 9) TIME[6] = 0x99; else { year_shi += 1; year_ge = 0; TIME[6] = year_shi * 16 + year_ge; year_flag = 0; } } key_state = 1; } if(key == 4) { year_shi = TIME[6]/16; //十位 year_ge = ((TIME[6])&0x0f); //个位 if(year_sub_flag == 0) { if(year_shi == 0x02 && year_ge == 0x02) { TIME[6] = 0x22; } else { if(year_ge == 0x00) { year_sub_flag = 1; } else TIME[6]-=1; } } if(year_sub_flag == 1) { year_shi -= 1; year_ge = 9; TIME[6] = year_shi * 16 + year_ge; year_sub_flag = 0; } key_state = 1; } break; case 2: if(key == 3) { month_shi = TIME[4]/16; //十位 month_ge = ((TIME[4])&0x0f); //个位 if(month_flag == 0) { if(month_shi == 0x01 && month_ge == 0x02) { TIME[4] = 0x12; } else { if(month_ge == 0x09) { month_flag = 1; } else TIME[4]+=1; } } if(month_flag == 1) { month_shi += 1; month_ge = 0; TIME[4] = month_shi * 16 + month_ge; month_flag = 0; } key_state = 1; } if(key == 4) { month_shi = TIME[4]/16; //十位 month_ge = ((TIME[4])&0x0f); //个位 if(month_sub_flag == 0) { if(month_shi == 0x00 && month_ge == 0x01) { TIME[4] = 0x01; } else { if(month_ge == 0x00) { month_sub_flag = 1; } else TIME[4]-=1; } } if(month_sub_flag == 1) { month_shi -= 1; month_ge = 9; TIME[4] = month_shi * 16 + month_ge; month_sub_flag = 0; } key_state = 1; } break; case 3: if(key == 3) { day_shi = TIME[3]/16; //十位 day_ge = ((TIME[3])&0x0f); //个位 if(day_flag == 0) { if(day_shi == 0x03 && day_ge == 0x01) { TIME[3] = 0x31; } else { if(day_ge == 0x09) { day_flag = 1; } else TIME[3]+=1; } } if(day_flag == 1) { day_shi += 1; day_ge = 0; TIME[3] = day_shi * 16 + day_ge; day_flag = 0; } key_state = 1; } if(key == 4) { day_shi = TIME[3]/16; //十位 day_ge = ((TIME[3])&0x0f); //个位 if(day_sub_flag == 0) { if(day_shi == 0x00 && day_ge == 0x01) { TIME[3] = 0x01; } else { if(day_ge == 0x00) { day_sub_flag = 1; } else TIME[3]-=1; } } if(day_sub_flag == 1) { day_shi -= 1; day_ge = 9; TIME[3] = day_shi * 16 + day_ge; day_sub_flag = 0; } key_state = 1; } break; case 4: if(key == 3) { hour_shi = TIME[2]/16; //十位 hour_ge = ((TIME[2])&0x0f); //个位 if(hour_flag == 0) { if(hour_shi == 0x02 && hour_ge == 0x03) { TIME[2] = 0x23; } else { if(hour_ge == 0x09) { hour_flag = 1; } else TIME[2]+=1; } } if(hour_flag == 1) { hour_shi += 1; hour_ge = 0; TIME[2] = hour_shi * 16 + hour_ge; hour_flag = 0; } key_state = 1; } if(key == 4) { hour_shi = TIME[2]/16; //十位 hour_ge = ((TIME[2])&0x0f); //个位 if(hour_sub_flag == 0) { if(hour_shi == 0x00 && hour_ge == 0x00) { TIME[2] = 0x00; } else { if(hour_ge == 0x00) { hour_sub_flag = 1; } else TIME[2]-=1; } } if(hour_sub_flag == 1) { hour_shi -= 1; hour_ge = 9; TIME[2] = hour_shi * 16 + hour_ge; hour_sub_flag = 0; } key_state = 1; } break; case 5: if(key == 3) { min_shi = TIME[1]/16; //十位 min_ge = ((TIME[1])&0x0f); //个位 if(min_flag == 0) { if(min_shi == 0x05 && min_ge == 0x09) { TIME[1] = 0x59; } else { if(min_ge == 0x09) { min_flag = 1;