郭天祥 - 十天学通单片机 - 实验板所有课后作业+答案(5)

}

shu=0;

bai=shu/100; shi=shu0/10; ge=shu;

void display(uchar aa,uchar bb,uchar cc) {

dula=1;

dula=1;

dula=1;

P0=table[cc];

P0=table[bb]; dula=0; P0=0xff; wela=1; P0=0xfd; wela=0; delay(1);

P0=table[aa]; dula=0; P0=0xff; wela=1; P0=0xfe; wela=0; delay(1);

}

dula=0; P0=0xff; wela=1; P0=0xfb; wela=0; delay(1);

#include #define uint unsigned int #define uchar unsigned char sbit dula=P2^6; sbit wela=P2^7; sbit key1=P3^4; uchar code table[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71}; uchar temp; uint num,num1; void delay(uint z) { }

uint keyscan();

void display(uchar,uchar,uchar); void main() {

uint x,y; for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

dula=1; P0=0; dula=0; wela=1; P0=0xc0; wela=0; while(1) { }

num1=keyscan();

display(num1/100,num10/10,num1);

void display(uchar aa,uchar bb,uchar cc) {

dula=1;

dula=1;

P0=table[bb]; dula=0; P0=0xff; wela=1; P0=0xfd; wela=0;

P0=table[aa]; dula=0; P0=0xff; wela=1; P0=0xfe; wela=0; delay(1);

delay(1);

dula=1; }

uint keyscan() {

P3=0xfe; temp=P3; temp=temp&0xf0; while(temp!=0xf0) {

delay(5); temp=P3; temp=temp&0xf0; while(temp!=0xf0) {

temp=P3;

P0=table[cc]; dula=0; P0=0xff; wela=1; P0=0xfb; wela=0; delay(1);

switch(temp) {

case 0xee:num=1;

break;

case 0xde:num=4;

break;

}

}

case 0xbe:num=9;

break;

case 0x7e:num=16;

break;

while(temp!=0xf0) { } }

temp=P3; temp=temp&0xf0;

P3=0xfd; temp=P3; temp=temp&0xf0; while(temp!=0xf0) {

delay(5); temp=P3; temp=temp&0xf0; while(temp!=0xf0) {

temp=P3;

switch(temp) {

case 0xed:num=25;

break;

case 0xdd:num=36;

break;