initled(); } }
//定时器中断
void time0() interrupt 1 {
TH0 = (65536 - 50000)/256; TL0 = (65536 - 50000)%6; timebreak0 ++;
if(timebreak0 == 20) //一秒定时 {
i --;
car_time ++; timebreak0 = 0; }
if(car_time == 300) //5分钟记录一次车流量 {
car_number = break_count; break_count = 0; car_time = 0; } }
//紧急中断
void Exit_0() interrupt 0 {
initcross(); num_stop ++;
if(num_stop % 2) {
flag_stop = 1; //第一次中断为禁止通行 TR0 = 0;
timebreak0 = 0; breakflag = 1; }
else //第二次中断为恢复正常通行 {
flag_stop = 0; TR0 = 1; dx_red = 1; nb_red = 1; } }
//紧急中断路口为红灯 void stop()
{
if(flag_stop) {
initled(); }
while(flag_stop) {
dx_red = 0; nb_red = 0; initnumber(); } }
//计数器
void countfunction() interrupt 2 {
break_count ++; }
//显示车流量
void displaycount() {
if(botton1 == 0) {
delay_ms(10); if(botton1 == 0) {
u8 flag = 1; while(!botton1); TR0 = 0;
break_count = break_count % 100; while(flag) {
display_2(DONG,break_count); display_2(XI,break_count); display_2(NAN,break_count); display_2(BEI,break_count); if(botton1 == 0) {
delay_ms(10); if(botton1 == 0) {
flag = 0;
while(!botton1); } }
}
initcross(); TR0 = 1;
breakflag = 1; } } }
//根据车流量自动调时 void autsettime() {
TR0 = 0;
if(car_number >= 0 && car_number <= 20) 间不同 {
dx_redtime = 20;
dx_gretime = 20;
nb_redtime = dx_gretime + yeltime; nb_gretime = dx_redtime - yeltime; }
else if(car_number > 20 && car_number <= 50) {
dx_redtime = 20;
dx_gretime = 50;
nb_redtime = dx_gretime + yeltime; nb_gretime = dx_redtime - yeltime; } else {
dx_redtime = 20;
dx_gretime = 70;
nb_redtime = dx_gretime + yeltime; nb_gretime = dx_redtime - yeltime; }
TR0 = 1; }
//初始化交通灯led void initled() {
dx_red = 1; dx_yel = 1; dx_gre = 1; nb_red = 1; nb_yel = 1; nb_gre = 1;
分钟内车流量不同，时 //5 }
//初始化数码管 void initnumber() {
display_2(DONG,0); display_2(XI,0); display_2(NAN,0); display_2(BEI,0); }
//初始化路口交通灯 void initcross() {
initled();
initnumber(); }
//异常情况处理
void breakfunction() {
oneway(); night(); stop(); settime();
displaycount(); autsettime(); if(breakflag) {
timebreak0 = 0; } }
//单向通行 void oneway() {
if(botton2 == 0) {
delay_ms(10); if(botton2 == 0) {
while(!botton2); TR0 = 0;
//timebreak0 = 0; initcross(); count_oneway ++;
while(count_oneway < 3) {