发布时间 : 星期日 文章基于STC89c52RC单片机的智能风扇设计更新完毕开始阅读577e73a8ed630b1c58eeb51e
光电信息协会电子设计竞赛 钟培文小组
irtime++; //外部中断 EA=1;
IT0 = 1; //指定外部中断0下降沿触发，INT0 (P3.2) EX0 = 1; ET0=1; ET1=1;
TR0=1; TR1=1; }
/*-----------------------------------------------外部中断0初始化------------------------------------------------*/
void Timer1(void) interrupt 3 using 1 {
static uchar count; TH1=(65536-256)/256; TL1=(65536-256)%6; irtime++; time3++; if(time3==255 { time3=0; }
if(beep_on==1)
{ spk=!spk; }
if(beep_time==1) {
beep_on=0; }
//定时器1pwm
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光电信息协会电子设计竞赛 钟培文小组
if(p) {
if (count==PWM_ON) {
PWM = 0; } count++;
if(count == CYCLE) {
count=0;
if(PWM_ON!=0)
PWM = 1;
} } }
//定时器0
void Timer0(void) interrupt 1 {
TH0=(65536-50000)/256; TL0=(65536-50000)%6; num++; if(num==1) {
beep_time=1; }
if(num==20) { num=0; time1++; if(time2)
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光电信息协会电子设计竞赛 钟培文小组
time2--; } }
/*... ..........按键扫描.............. ..................................... */
unsigned char KeyScan(void) {
unsigned char keyvalue; if(KeyPort!=0xff) {
Delayms(3); if(KeyPort!=0xff) {
keyvalue=KeyPort;
while(KeyPort!=0xff); switch(keyvalue)
{
case 0xfe:return 1;break; case 0xfd:return 2;break; case 0xfb:return 3;break; case 0xf7:return 4;break; case 0xef:return 5;break; case 0xdf:return 6;break; case 0xbf:return 7;break; case 0x7f:return 8;break; default:return 0;break; }
} } return 0; }
/*..........................................
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光电信息协会电子设计竞赛 钟培文小组
.............................................*/
void Timing(void) {
switch(timing_flag) {
定时功能 定时器2
case 1: tim=10; if(timing_on==0)write_string(11,1,\case 2: tim=1800; if(timing_on==0)write_string(11,1,\case 3: tim=3600; if(timing_on==0)write_string(11,1,\case 4: tim=7200;if(timing_on==0)write_string(11,1,\case 5: tim=10800;if(timing_on==0)write_string(11,1,\case 6: tim=0;timing_flag=0; write_string(11,1,\ \}
if(timing_on==0) {
timing_r=1; time2=0; }
if(timing_run && timing_r && timing_on) { time2=tim; timing_r=0; timing_flag=0; } }
void write_com(uchar com) {
Delayms(5);
//30min //60min
//120min //180min
//定时取消
/*.........................................1602部分.............................................*/
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