#include <reg52.h> //調(diào)用單片機(jī)頭文件 #define uchar unsigned char //無(wú)符號(hào)字符型 宏定義 變量范圍0~255 #define uint unsigned int //無(wú)符號(hào)整型 宏定義 變量范圍0~65535 #include <intrins.h> 0 1 2 3 4 5 6 7 8 9 uchar code smg_du[]={0x28,0xe1,0x32,0xa2,0x54,0xa1,0x21,0xea,0x20,0xa0, a b c d e f g 0x60,0x25,0x39,0x26,0x31,0x71,0xff}; //數(shù)碼管段選定義 uchar code smg_we[]={0xef,0xdf,0xbf,0x7f};//數(shù)碼管位選定義 uchar dis_smg[8] = {0}; uchar smg_i = 4; //顯示數(shù)碼管的個(gè)位數(shù) sbit beep = P2^3; //蜂鳴器IO口定義 bit flag_lj_en; //按鍵連加使能 bit flag_lj_3_en; //按鍵連3次連加后使能 加的數(shù)就越大了 uchar key_time,key_value; //用做連加的中間變量 bit key_500ms ; bit flag_300ms ; uchar menu_1; //菜單設(shè)計(jì)的變量 uint t_high = 20; //上限報(bào)警值 sbit hx711_dout=P2^7; sbit hx711_sck=P2^6; //hx711模塊端口選擇 long weight; unsigned long HX711_Buffer = 0; unsigned long Weight_Maopi = 0; uint temp,qi_weight; bit chaozhong_flag; bit leiji_flag; uchar flag_200ms ; #define GapValue 437.0 uint temp,qi_weight; bit chaozhong_flag; bit leiji_flag; /***********************1ms延時(shí)函數(shù)*****************************/ void delay_1ms(uint q) { uint i,j; for(i=0;i<q;i++) for(j=0;j<120;j++); } /***********************數(shù)碼顯示函數(shù)*****************************/ void display() { static uchar i; i++; if(i >= smg_i) i = 0; P1 = 0xff; //消隱 P3 = smg_we; //位選 P1 = dis_smg; //段選 } /*************定時(shí)器0初始化程序***************/ void time_init() { EA = 1; //開(kāi)總中斷 TMOD = 0X01; //定時(shí)器0、定時(shí)器1工作方式1 ET0 = 1; //開(kāi)定時(shí)器0中斷 TR0 = 1; //允許定時(shí)器0定時(shí) } /********************獨(dú)立按鍵程序*****************/ uchar key_can; //按鍵值 void key() //獨(dú)立按鍵程序 { static uchar key_new; key_can = 20; //按鍵值還原 P2 |= 0x07; if((P2 & 0x07) != 0x07) //按鍵按下 { if(key_500ms == 1) //連加 { key_500ms = 0; key_new = 1; } delay_1ms(1); //按鍵消抖動(dòng) if(((P2 & 0x07) != 0x07) && (key_new == 1)) { //確認(rèn)是按鍵按下 key_new = 0; switch(P2 & 0x07) { case 0x06: key_can = 3; break; //得到k2鍵值 case 0x05: key_can = 2; break; //得到k3鍵值 case 0x03: key_can = 1; break; //得到k4鍵值 } flag_lj_en = 1; //連加使能 } } else { if(key_new == 0) { key_new = 1; flag_lj_en = 0; //關(guān)閉連加使能 flag_lj_3_en = 0; //關(guān)閉3秒后使能 key_value = 0; //清零 key_time = 0; key_500ms = 0; } } } /****************按鍵處理數(shù)碼管顯示函數(shù)***************/ void key_with() { if(key_can == 1) //設(shè)置鍵 { menu_1 ++; if(menu_1 >= 2) { menu_1 = 0; smg_i = 4; //數(shù)碼管顯示3位 flag_300ms = 1; } } if(menu_1 == 1) //設(shè)置報(bào)警 { smg_i = 4; //數(shù)碼管顯示4位 if(key_can == 2) { if(flag_lj_3_en == 0) t_high += 10 ; //按鍵按下未松開(kāi)自動(dòng)加三次 else t_high += 100; //按鍵按下未松開(kāi)自動(dòng)加三次之后每次自動(dòng)加10 if(t_high > 9990) t_high = 9990; } if(key_can == 3) { if(flag_lj_3_en == 0) t_high -= 10 ; //按鍵按下未松開(kāi)自動(dòng)減三次 else t_high -= 100; //按鍵按下未松開(kāi)自動(dòng)減三次之后每次自動(dòng)減10 if(t_high <= 10) t_high = 10; } dis_smg[0] = smg_du[t_high / 10 % 10]; //取小數(shù)顯示 dis_smg[1] = smg_du[t_high / 100 % 10] ; //取個(gè)位顯示 dis_smg[2] = smg_du[t_high / 1000 % 10] & 0xdf; //取十位顯示 dis_smg[3] = 0x64; //H } } /****************報(bào)警函數(shù)***************/ void clock_h_l() { static uchar value; if(weight >= t_high) { value ++; //消除實(shí)際距離在設(shè)定距離左右變化時(shí)的干擾 if(value >= 2) { beep = ~beep; //蜂鳴器報(bào)警 } } else { beep = 1; } } void Delay__hx711_us(void) { _nop_(); _nop_(); } unsigned long HX711_Read(void) //增益128 { unsigned long count; unsigned char i; hx711_sck=0; Delay__hx711_us(); hx711_dout=1; while(hx711_dout==0); for(i=0;i<24;i++) { hx711_sck=0; count=count<<1; hx711_sck=1; if(hx711_dout) count++; } hx711_sck=1; count=count^0x8000;//下降沿來(lái)時(shí),轉(zhuǎn)換數(shù)據(jù) Delay__hx711_us(); hx711_sck=0; return(count); } void get_weight() //獲取被測(cè)物體重量 { weight = HX711_Read(); weight = weight - Weight_Maopi; //獲取凈重 if(weight > 0) { weight = (unsigned int)((float)weight/GapValue); //計(jì)算實(shí)物的實(shí)際重量 } else { weight = 0; } } /****************主函數(shù)***************/ void main() { time_init(); //初始化定時(shí)器 while(1) { key(); //按鍵程序 if(key_can < 10) { key_with(); //設(shè)置報(bào)警壓力 } if(flag_300ms == 1) //300ms 處理一次壓力程序 { flag_300ms = 0; get_weight(); //獲取被測(cè)物體重量 clock_h_l(); //報(bào)警函數(shù) if(menu_1 == 0) { smg_i = 4; dis_smg[0] = smg_du[weight % 10]; //取壓力的小數(shù)顯示 dis_smg[1] = smg_du[weight / 10 % 10] ; //取壓力的個(gè)位顯示 dis_smg[2] = smg_du[weight / 100 % 10] ; //取壓力的十位顯示 dis_smg[3] = smg_du[weight / 1000 % 10] & 0xdf; //取壓力的百位顯示 } } display(); //數(shù)碼管顯示函數(shù) } } /*************定時(shí)器0中斷服務(wù)程序***************/ void time0_int() interrupt 1 { static uchar value; //定時(shí)2ms中斷一次 TH0 = 0xf8; TL0 = 0x30; //2ms value++; if(value >= 100) { value = 0; flag_300ms = 1; } if(flag_lj_en == 1) //按下按鍵使能 { key_time ++; if(key_time >= 250) //500ms { key_time = 0; key_500ms = 1; //500ms key_value ++; if(key_value > 3) { key_value = 10; flag_lj_3_en = 1; //3次后1.5秒連加大些 } } } }
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