精選文庫下面介紹main.c主程序編寫，其他程序略。(1) 頭文件和一些宏定義#include #include #include #include lcd.h#include hx711.h#include keyboard.h/定義量程系數(shù)#define RATIO 2114/1623/定義標識volatile bit FlagTest = 0;/定時測試標志，每0.5秒置位，測完清0volatile bit FlagKeyPress = 0; /有鍵按下標志，處理完畢清0volatile bit FlagSetPrice = 0; /價格設置狀態(tài)標志，設置好為1。/管腳定義sbit LedA = P22;sbit beep = P10;sbit alert = P11;/顯示用變量int Counter;uchar idata str16 = 000000;int i, iTemp;/稱重用變量unsigned long idata FullScale; /滿量程AD值/1000unsigned long AdVal; /AD采樣值unsigned long weight; /重量值，單位gunsigned long idata price; /單價，長整型值，單位為分 unsigned long idata money; /總價，長整型值，單位為分/鍵盤處理變量uchar keycode;uchar DotPos; /小數(shù)點標志及位置/函數(shù)聲明void int2str(int, char *);void Data_Init();void Port_Init(); void Timer0_Init();void Timer0_ISR () ;void INT1_Init();void KeyPress(uchar);void To_Zero();void Display_Price();void Display_Weight();void Display_Money();/整型轉(zhuǎn)字符串的函數(shù)，轉(zhuǎn)換范圍0-65536void int2str(int x, char* str) int i=1; int tmp=10; while(x/tmp!=0) i+; tmp*=10; tmp=x; stri=0; while(i1) str-i=0+(tmp%10); tmp/=10; str0=tmp+0; /重新找回零點，每次測量前調(diào)用void To_Zero() FullScale=ReadCount()/1000; price=0;/顯示單價，單位為元，四位整數(shù)，兩位小數(shù)void Display_Price() unsigned int i,j; display_GB2312_string(5,44, ); i = price/100; /得到整數(shù)部分 j = price - i*100;/得到小數(shù)部分 int2str(i,str1); /顯示整數(shù)部分 if (i=1000) display_GB2312_string(5,44,str1); else if (i=100) display_GB2312_string(5,52,str1); else if (i=10) display_GB2312_string(5,60,str1); else display_GB2312_string(5,68,str1); /顯示小數(shù)點 display_GB2312_string(5,76,.); /顯示小數(shù)部分 int2str(j,str1); if (j=10) display_GB2312_string(3,60,str1); else display_GB2312_string(3,68,str1); display_GB2312_string(3,76,.); int2str(j,str1); if (j10) display_GB2312_string(3,84,00); display_GB2312_string(3,100,str1); else if (j999999) /超出顯示量程 display_GB2312_string(7,44,-); return; i = money/100; /得到整數(shù)部分 j = money - i*100;/得到小數(shù)部分 int2str(i,str1); /顯示整數(shù)部分 if (i=1000) display_GB2312_string(7,44,str1); else if (i=100) display_GB2312_string(7,52,str1); else if (i=10) display_GB2312_string(7,60,str1); else display_GB2312_string(7,68,str1); /顯示小數(shù)點 display_GB2312_string(7,76,.); /顯示小數(shù)部分 int2str(j,str1); if (j= 200) FlagTest = 1; Counter = 0; /按鍵響應程序，參數(shù)是鍵值/返回鍵值：/ 7 8 9 10(清0)/ 4 5 6 11(刪除)/ 1 2 3 12(未定義)/ 14(未定義) 0 15(.) 13(確定價格)void KeyPress(uchar keycode) switch (keycode) case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: case 9: /目前在設置整數(shù)位，要注意price是整型，存儲單位為分 if (DotPos = 0) /最多只能設置到千位if (price0x8000) weight=0; weight=10000*weight/FullScale; weight=weight*RATIO; /如果超量程，則報警 if (weight = 10000) beep = 0;alert = 0;display_GB2312_string(3,60,-);display_GB2312_string(7,44,-); /如果不超量程 else beep = 1;alert = 1;/顯示重量值 Display_Weight(); /如果單價設定好了，則計算價格 if (FlagSetPrice = 1) money = weight*price/1000; /money單位為分 /顯示總金額 Display_Money(); else display_GB2312_string(7,44, ); /清測試標志 FlagTes