做个基于Atmel的数字钟(第三步)

#include<REG2051.H>

code senen_seg[10]={0x81,0xe7,0x92,0xa2,0xe4,0xa8,0x88,0xe3,0x80,0xa0};

bit key1_enter=0,key2_enter=0,key3_enter=0,countdown_mark=0,stopwatch_mark=0,count_mark=0,bell_mark=0;

unsigned char program=0,program_variable=0,count_bit=0,count=0;

unsigned char hour=10,minute=10,second=0;

unsigned char delayed_hour=22,delayed_minute=10,delayed_second=0;

unsigned char count_hour=0,count_minute=0,count_second=0;

unsigned int count_time=0,count_count=0;

void delay(unsigned int t)

{

unsigned int i,j;

for(i=0;i<t;i++)

for(j=0;j<10;j++)

;

}

void time0_init(void){

EA=0;

TR0=0;

TMOD=0x02;

TH0=0x4;

TL0=0x4;

ET0=1;

TR0=1;

EA=1;

}



static void timer0_isr(void) interrupt TF0_VECTOR using 1

{

count_time++;

if(count_time>=4020){

count_time=0;

second++;

if(second>=60){

second=0;

minute++;

if(minute>=60){

minute=0;

hour++;

if(hour>=24)hour=0;

}

}

}

if(delayed_hour==hour && delayed_minute==minute && second<4) P3_7=0;

else P3_7=1;

if(countdown_mark==1){

count_count++;

if(count_count>=4000 && (count_second!=0|count_minute!=0|count_hour!=0)){

count_count=0;

count_second--;

if(count_second>=60){

count_second=59;

count_minute--;

if(count_minute>=60){

count_minute=59;

count_hour--;

if(count_hour>=100) count_hour=99;

}

}

}

if(count_second==0&&count_minute==0&&count_hour==0&&count_count<=12000) P3_7=0;

else P3_7=1;

if(count_count>=15000) count_count=14000;

}

if(stopwatch_mark==1){ count_count++;

if(count_count>=40){

count_count=0;

count_second++;

if(count_second>=100){

count_second=0;

count_minute++;

if(count_minute>=60){

count_minute=0;

count_hour++;

if(count_hour>=60) count_hour=0;

}

}

}

}

}

unsigned char show_key (void){

unsigned char x=0,y=0;

switch (program){

case 0: P1&=senen_seg[second%10]; 

break;

case 1: if(count_time>=2000) P1&=senen_seg[second%10]; 

break;

case 2: if(delayed_hour==24) P1=0xfe; 

else P1&=senen_seg[delayed_second%10];

break;

case 3: if(count_bit>=0) P1&=senen_seg[count_second%10];

else P1=0xff;

break;

case 4: P1&=senen_seg[count_second%10]; 

break;

case 5: P1&=senen_seg[count_second%10]; 

break;

}

P3_3=0;

delay(10);

if(P3_5==0){ 

key1_enter=1;

if(count<=254)count++;

}

if(P3_4==0) key2_enter=1;

if(P3_2==0) key3_enter=1; 

P3_3=1;

P1|=0xff;

switch (program){

case 0: P1&=senen_seg[second/10];

break;

case 1: if(count_time>=2000) P1&=senen_seg[second/10]; 

break;

case 2: if(delayed_hour==24) P1=0xfe; 

else P1&=senen_seg[delayed_second/10];

break;

case 3: if(count_bit>=1) P1&=senen_seg[count_second/10];

else P1=0xff;

break;

case 4: P1&=senen_seg[count_second/10];

break;

case 5: P1&=senen_seg[count_second/10];

break;

}

P3_1=0;

delay(10);

P3_1=1;

P1|=0xff;

switch (program){

case 0: P1&=senen_seg[minute%10];

break;

case 1: if(count_time>=2000) P1&=senen_seg[minute%10];

break;

case 2: if(delayed_hour==24) P1=0xfe;

else P1&=senen_seg[delayed_minute%10];

break;

case 3: if(count_bit>=2) P1&=senen_seg[count_minute%10];

else P1=0xff;

break;

case 4: P1&=senen_seg[count_minute%10];

break;

case 5: P1&=senen_seg[count_minute%10];

break;

}

P3_2=0;

delay(10);

P3_2=1;

P1|=0xff;

switch (program){

case 0: P1&=senen_seg[minute/10];

break;

case 1: if(count_time>=2000) P1&=senen_seg[minute/10];

break;

case 2: if(delayed_hour==24) P1=0xfe;

else P1&=senen_seg[delayed_minute/10];

break;

case 3: if(count_bit>=3) P1&=senen_seg[count_minute/10];

else P1=0xff;

break;

case 4: P1&=senen_seg[count_minute/10];

break;

case 5: P1&=senen_seg[count_minute/10]; 

break;

}

P3_5=0;

delay(10);

P3_5=1;

P1|=0xff;

switch (program){

case 0: P1&=senen_seg[hour%10];

break;

case 1: if(count_time>=2000) P1&=senen_seg[hour%10]; 

break;

case 2: if(delayed_hour==24) P1=0xfe;

else P1&=senen_seg[delayed_hour%10];

break;

case 3: if(count_bit>=4) P1&=senen_seg[count_hour%10];

else P1=0xff;

break;

case 4: P1&=senen_seg[count_hour%10]; break;

case 5: P1&=senen_seg[count_hour%10];

break;

}

P3_0=0;

delay(10);

if(P3_4==1 && key2_enter==1){

x=3; key2_enter=0;

}

P3_0=1;

P1|=0xff;

switch (program){

case 0: P1&=senen_seg[hour/10]; break;

case 1: if(count_time>=2000) P1&=senen_seg[hour/10]; break;

case 2: if(delayed_hour==24) P1=0xfe; else P1&=senen_seg[delayed_hour/10];

break;

case 3: if(count_bit>=5)P1&=senen_seg[count_hour/10]; else P1=0xff;

break;

case 4: P1&=senen_seg[count_hour/10];

break;

case 5: P1&=senen_seg[count_hour/10]; break;

}

P3_4=0;

delay(10);

if(P3_5==1 && key1_enter==1){

if(count>=127) x=1; else x=2; key1_enter=0;

count=0;

}

if(P3_2==1 && key3_enter==1){

x=4; 

key3_enter=0;

}

P3_4=1;

P1|=0xff;

if(program<=1 && count_time>=2000) P1&=0xff;

if(program<=1 && count_time<=2000) P1&=0x7f;

if(program==2) P1&=0x7f;

if(program==3) P1&=0xff;

if(program==4) P1&=0x7f;

if(program==5) P1&=0xff;

y=x;

x=0;

return y;

}

void main(){ 

P1=0xff;

P3=0xff;

time0_init();

while(1){

switch(program){

case 0: while(program==0){

switch(show_key()){

case 0: break;

case 1: program=0;

break;

case 2: program=1;

break;

}

}

break; 

case 1: while(program==1){

switch(show_key()){

case 0: break;

case 1: program=0;

break;

case 2: program=2;

break;

case 3: hour++;

if(hour>=24)hour=0;

break;

case 4: minute++;

if(minute>=60)minute=0;

break;

}

}

break;

case 2: while(program==2){

switch(show_key()){

case 0: break;

case 1: program=0;

break;

case 2: program=3;

break;

case 3: delayed_hour++;

if(delayed_hour>=25)delayed_hour=0;

break;

case 4: delayed_minute++;

if(delayed_minute>=60)delayed_minute=0;

break;

}

}

break;

case 3: while(program==3){ 

switch(show_key()){

case 0: break;

case 1: program=0;

break;

case 2: program=4;

break;

case 3: count_bit++;

if(count_bit>=7)count_bit=0;

break;

case 4: switch(count_bit){

case 0: count_second+=1;

break;

case 1: count_second+=10;

break;

case 2: count_minute+=1;

break;

case 3: count_minute+=10;

break;

case 4: count_hour+=1;

break;

case 5: count_hour+=10;

break;

case 6: break;

}

if(count_hour>=100) count_hour-=100;

if(count_minute>=60) count_minute-=60;

if(count_second>=60) count_second-=60;

break;

}

if(count_bit==6) countdown_mark=1;

else countdown_mark=0;

}

break;

case 4: count_hour=0; 

count_minute=0;

count_second=0;

while(program==4){

switch(show_key()){

case 0: break;

case 1: program=0;

break;

case 2: program=5;

break;

case 3: stopwatch_mark=~stopwatch_mark;

break;

case 4: if(stopwatch_mark==0){

count_hour=0;

count_minute=0;

count_second=0;

}

break;

}

}

break; 

case 5: count_hour=0;

count_minute=0;

count_second=0;

while(program==5){

switch(show_key()){

case 0: break;

case 1: program=0;

break;

case 2: program=0;

break;

case 3: count_second++;

if(count_second>=100){

count_second=0;

count_minute++;

if(count_minute>=100){

count_minute=0;

count_hour++;

if(count_hour>=100)count_hour=0;

}

}

break;

case 4: count_hour=0;

count_minute=0;

count_second=0;

break;

}

if(P3_7==0){

while(P3_7==0) show_key();

count_second++;

if(count_second>=100){

count_second=0;

count_minute++;

if(count_minute>=100){

count_minute=0;