基于1602液晶屏显示的PWM测试 -

标题: 基于1602液晶屏显示的PWM测试 [打印本页]

作者: 坎纸啦啦啦 时间: 2018-7-6 10:05
标题: 基于1602液晶屏显示的PWM测试

//设计实现PWM功能，通过按键实现占空比10-90%可调，1602液晶屏显示占空比数据。

#include<reg52.h>
#define  uint unsigned int
#define uchar unsigned char
sbit  a=P1^0;
sbit  key0=P3^6;
sbit  key1=P3^7;
sbit dula=P2^6;
sbit wela=P2^7;
sbit lcden=P3^4;
sbit lcdrs=P3^5;
uchar code  table1[]="duty=50%";
uchar duty,num,b;
uchar  number;
void delayms(uint xms)
{
uint  i,j;
for(i=xms;i>0;i--)
   for(j=110;j>0;j--);
}
void write_com(uchar com)
{
lcdrs=0;
P0=com;
delayms(5);
lcden=1;
delayms(5);
lcden=0;
}
void write_data(uchar date)
{
lcdrs=1;
P0=date;
delayms(5);
lcden=1;
delayms(5);
lcden=0;
}
void LCD1602init()
{
dula=0;
wela=0;
lcden=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<8;num++)
{
write_data(table1[num]);
delayms(5);
}
}

void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+add);
write_data(0x30+shi);
write_data(0x30+ge);
}
void keyscan()
{
if(key0==0)
{
   delayms(10);
   if(key0==0)
      {
   number--;
   if(number==9)
   {
      number=90;
   }
}
while(!key0);
}
if(key1==0)
{
   delayms(10);
   if(key1==0)
      {
   number++;
   if(number==91)
   {
      number=10;
   }
}
while(!key1);
}
}
void main()
{

LCD1602init();
TMOD=0x01;
TH0=(65336)/256;
TL0=(65336)%256;
EA=1;
ET0=1;
TR0=1;
number=50;
while(1)
{
keyscan();
write_sfm(5,number);
}
}
void T0_time() interrupt 1
{

TH0=65336/256;
TL0=65336%256;
a=0;
num++;
if(num==100-duty)
   a=1;
if(num==100)
{
num=0;
a=0;
}
}

作者: mhxbyl 时间: 2018-7-8 19:43
有相应的仿真不？

作者: 125844584 时间: 2020-4-7 12:56
想要仿真电路

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