单片机上机操作考试题部分答案.docx

I.使得8个发光二极管循环点亮，采用定时器方式0使得每个发光二极管点亮的时间为 0.5$o D1U1R1189293031? ?? ?? ^XTAL1P0.0/AD0P0.1/AD1P0.2/AD2XTAL2P0.3/AD3P0.4/AD4P0.5/AD5P0.6/AD6RST D1 U1 R1 18 9 29 30 31 ? ? ? ? ? ? 1 2 3 4 5 6 7 8 伯 ^XTAL1 P0.0/AD0 P0.1/AD1 P0.2/AD2 XTAL2 P0.3/AD3 P0.4/AD4 P0.5/AD5 P0.6/AD6 RST P0.7/AD7 P2.0//J8 P2A/PQ P2.2/A10 PSEN P2.3/A11 ALE P2.4/A12 EA P2.5/A13 P2.6/A14 P2.7/A15 P1.0 P3.0/RXD P1.1 P3.1/TXD P1.2 P3.2/INT0 P1.3 P3.3/INT1 P1.4 P3.4/T0 P1.5 P3.5/T1 P1.6 P3.6/WR P1.7 P3.7/RD AT89C51 TEXT ?GREEN XT. ? 220?? R2?? ??囲?GREEN a.? 220?? cTCXfl R3?? 21 22 23 24 25 26 27 28 10 11 12 13 14 15 16 17 -GREEN KT?? 220?? ::TEXT R4?? -GREEN ?? 220?? R5?? 220?? ?GREEN令 T€XT R6 ?GREEN 220?? R7?? 220?? -GREEN ? TEXT???R8?? 220?? LED-GREEN ? TEXT xTCYTx #in cludereg5I.h #includeintrins.h #define uchar unsigned char uchar T_count=0; 〃定时中断 void toProc() interrupt l { TH0=(8192-5000)/32; 〃恢复初值 TL0=(8192-5000)%32; if(++T_count==100) //0.5s 移动一位 { P0=_crol_(P0J); T_count=0; } } 〃主函数 void main() TMOD=0; TH0=(8192-5000)/32; //5ms 定吋 TL0=(8192?5000)%32; EA=1; ET0=l; TR0=l; P0=0xfe; while(l); } 2?完成下面电路所示的功能，KI, K2对应两个开关按键。P1 口对应发光二极管的状态 ? U1 20— 38_ 37_D13Z_GREEN?GREENK1LED?GREENAT8Q.C51 TEXTJ2?令???囲?GREEH一FK2 t. ?P0.0/AD0XTAL1 P0.1/AD1P0.2/AD2P0.3/AD3XT 員 L2P0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7 ? U1 20— 38_ 37_ D1 3Z_ GREEN ?GREEN K1 LED?GREEN AT8Q.C51 TEXT J 2 ?令???囲?GREEH 一F K2 t. ? P0.0/AD0 XTAL1 P0.1/AD1 P0.2/AD2 P0.3/AD3 XT 員 L2 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 RST P2.0/A6 P2.1//? P2.2/A10 P2.3/A11 PSEN P2.4/A12 ALE P2.5/A13 EA P2.6/A14 P2.7/A15 P3.0/RXD P1.0 P3.1/TXD R1.1 P32INT0 P1.2 P3.3/INT1 R1.3 P3.4/TO DO 氏,T4 P1.4 ro.O/ 11 P3.6WR r 1.0 P1.6 P3.7/RD P1.7 2Z_ 1b 17 10 11 22 23 GREEN R1 ?GREEN 220 TEXT??? R4 30 -21 o 5 22?r ?GREEN 刑GREEH T ■ 卜 220? 220 ?? TEXT Pl.0 Pl.I Pl.2 Pl.3 Pl.4 Pl.5 Pl.6 Pl.7 Kl=0,K2=0 O o O O O O O o Kl=0,K2=l ? ? ? ? o O O o Kl = l,K2=0 ? ? o o ? ? o o Kl = l,K2=l ? ? ? ? ? ? ? ? #includereg51.h #define uint unsigned int #define uchar unsigned char