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引腳定義
//LCD1602 IO設置
LCD1602_RS = P2^5;
LCD1602_RW = P2^6;
LCD1602_EN = P2^7;
/DS1302 IO設置
sbit DS1302_RST = P1^2; //實時時鐘復位線引腳
sbit DS1302_IO = P1^1; //實時時鐘數(shù)據(jù)線引腳
sbit DS1302_CLK = P1^0; //實時時鐘時鐘線引腳
//DS18B20 IO設置
sbit DS18B20_DQ = P1^3;
//按鍵 IO設置
sbit KEY1 = P3^2;
sbit KEY2 = P3^3;
sbit KEY3 = P3^4;
sbit KEY4 = P3^5;
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