想要在下列代码中进行添加或修改使得方波的占空比通过按键可调可调并在1602显示（关于占空比我改了一部分可能有错）
#include<reg52.h> //包含头文件
#include<intrins.h>
#define uchar unsigned char //宏定义
#define uint unsigned int
sbit s1=P1^0; //定义按键的接口
sbit s2=P1^1;
sbit s3=P1^2;
sbit s4=P1^3;
sbit lcdrs=P1^6; //液晶控制位
sbit lcden=P1^7;
char num,boxing,u; //定义全局变量
int pinlv=50,bujin=10,bujin1=10,zhanbongbi=9;
uchar geshu=1; //两次DA输出数组中的个数
uchar code table[]="0123456789"; //定义显示的数组
uchar code table1[]="pinlv:boxing:";
uchar code table2[]="0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 123456789";
unsigned long int m;
int n=0;
float hc=0;
int a,b,h,num1;
uchar code sin[64]={
135,145,158,167,176,188,199,209,218,226,234,240,245,249,252,254,254,253,251,247,243,237,230,222,213,204,193,182,170,158,
146,133,121,108,96,84,72,61,50,41,32,24,17,11,7,3,1,0,0,2,5,9,14,20,28,36,45,55,66,78,90,102,114,128
}; //正弦波取码
uchar code juxing[64]={
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
}; //矩形波取码
uchar code juchi[64]={
0,4,8,12,16,20,24,28,32,36,40,45,49,53,57,61,65,69,73,77,81,85,89,93,97,101,105,109,113,117,121,125,130,134,138,142,
146,150,154,158,162,166,170,174,178,182,186,190,194,198,202,206,210,215,219,223,227,231,235,239,243,247,251,255
}; //锯齿波取码
uchar code sanjiao[64]={
0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128,136,144,152,160,168,176,184,192,200,208,216,224,232,240,248,
248,240,232,224,216,208,200,192,184,176,168,160,152,144,136,128,120,112,104,96,88,80,72,64,56,48,40,32,24,16,8,0
}; //三角波取码
void delay(uint xms) //延时函数
{
int a,b;
for(a=xms;a>0;a--)
for(b=110;b>0;b--);
}
void write_com(uchar com) //写命令函数
{
lcdrs=0;
P0=com;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void write_date(uchar date) //写数据函数
{
lcdrs=1;
P0=date;
delay(1);
lcden=1;
delay(1);
lcden=0;
}
void init_lcd() //初始化函数
{
lcden=0; //默认开始状态为关使能端，见时序图
write_com(0x0f);
write_com(0x38); //显示模式设置，默认为0x38,不用变。
write_com(0x01); //显示清屏，将上次的内容清除，默认为0x01.
write_com(0x0c); //显示功能设置0x0f为开显示，显示光标，光标闪烁；0x0c为开显示，不显光标，光标不闪
write_com(0x06); //设置光标状态默认0x06,为读一个字符光标加1.
write_com(0x80); //设置初始化数据指针，是在读指令的操作里进行的
}
void initclock() //时钟初始化
{
uint i;
TMOD=0x01;
TH0=a;
TL0=b;
EA=1;
ET0=1;
TR0=1;
for(i=6;i<13;i++) //显示初始化
{
write_date(table1[i]);
delay(2);
}
write_com(0x80+0x40);
for(i=0;i<6;i++)
{
write_date(table1[i]);
delay(2);
}
write_com(0x80+7);
write_date('s');
write_date('i');
write_date('n');
write_date(' ');
write_date(' ');
write_date(' ');
write_date(' ');
write_com(0x80+0x40+0xa);
write_date(' ');
write_date('1');
write_date('0');
write_date('H');
delay(2);
write_date('Z');
delay(2);
}
void display() //显示函数
{
uchar wan,qian,bai,shi,ge;
uint a=0;
a=pinlv;
wan=a/10000;
qian=a/1000%10;
bai=a/100%10;
shi=a%100/10;
ge=a%100%10;
write_com(0x80+0x40+8);
write_date(table[wan]);
delay(2);
write_date(table[qian]);
delay(2);
write_date(table[bai]);
delay(2);
write_date(table[shi]);
delay(2);
write_date(table[ge]);
delay(2);
write_date('H');
delay(2);
write_date('Z');
delay(2);
if(boxing==0)
{
write_com(0x80+7);
write_date('s');
write_date('i');
write_date('n');
write_date(' ');
write_date(' ');
write_date(' ');
write_date(' ');
}
if(boxing==1)
{
write_com(0x80+7);
write_date('j');
write_date('u');
write_date('x');
write_date('i');
write_date('n');
write_date('g');
}
if(boxing==2)
{
write_com(0x80+7);
write_date('s');
write_date('a');
write_date('n');
write_date('j');
write_date('i');
write_date('a');
write_date('o');
}
if(boxing==3)
{
write_com(0x80+7);
write_date('j');
write_date('u');
write_date('c');
write_date('h');
write_date('i');
write_date(' ');
write_date(' ');
}
}
uchar keyscan() //键盘检测函数
{
// if(P1&0x0F==0x0F) return 0;
if(s1==0)
{
EA=0;
delay(1);
if(s1==0)
{
while(!s1);
pinlv+=bujin;
if(pinlv>30000)
{
pinlv=30000;
}
geshu=pinlv/120+1;
if(pinlv>960)
{
geshu=8;
bujin=100;
bujin1=100;
}
if(pinlv>1080) geshu=10;
if(pinlv>2000) geshu=11;
hc=15625/pinlv;
m=hc*geshu;
m-=54;
m/=15;
EA=1;
display();
}
}
if(s2==0)
{
delay(1);
if(s2==0)
{
EA=0;
while(!s2);
pinlv-=bujin;
if(pinlv<0)
{
pinlv=0;
}
geshu=pinlv/120+1;
if(pinlv>960)
{
geshu=8;
bujin=100;
bujin1=100;
}
if(pinlv>1080) geshu=10;
if(pinlv>2000) geshu=11;
if(pinlv<=3100)
{hc=15625/pinlv;
m=hc*geshu;
m-=54;
m/=15;}
else
{
m=65276+(pinlv-480);
}
display();
EA=1;
}
}
if(s3==0)
{
delay(1);
if(s3==0)
{
EA=0;
while(!s3);
boxing++;
if(boxing==4)
{
boxing=0;
}
display();
EA=1;
}
}
return 1;
}
void bujindisplay()
{
uint bai,shi,ge;
bai=bujin1/100;
shi=bujin1%100/10;
ge=bujin1%100%10;
write_com(0x80+6);
write_date(table[bai]);
delay(1);
write_date(table[shi]);
delay(1);
write_date(table[ge]);
delay(1);
}
void bujinjiance()
{
if(s4==0)
{
delay(3);
if(s4==0)
{
while(!s4);
h++;
if(h==1)
{
write_com(0x01);
write_com(0x80);
write_date('b');delay(1);
write_date('u');delay(1);
write_date('j');delay(1);
write_date('i');delay(1);
write_date('n');delay(1);
write_date(':');delay(1);
bujin1=bujin;
bujindisplay();
}
if(h==2)
{
h=0;
bujin=bujin1;
init_lcd();
initclock();
display();
}
}
}
if(h==1)
{
if(s1==0)
{
delay(5);
if(s1==0)
{
while(!s1);
bujin1++;
if(bujin1==101)
{
bujin1=100;
}
bujindisplay();
}
}
if(s2==0)
{
delay(5);
if(s2==0)
{
while(!s2);
bujin1--;
if(bujin1==0)
{
bujin1=100;
}
bujindisplay();
}
}
}
}
void zhankongbidisplay()
{
write_com(0x80+0x40+0x0d);
write_date(table2[zhankongbi]);
delay(1);
}
void zhankongbice()
{
if(s4==0)
{
delay(3);
if(s4==0)
{
while(!s4);
h++;
if(h==1)
{
write_com(0x01);
write_com(0x80+0x40);
write_date('z');delay(1);
write_date('h');delay(1);
write_date('a');delay(1);
write_date('n');delay(1);
write_date('k');delay(1);
write_date('o');delay(1);
write_date('n');delay(1);
write_date('g');delay(1);
write_date('b');delay(1);
write_date('i');delay(1);
write_date(':');delay(1);
write_com(0x80+0x40+0x0f);
write_date(':');delay(1);
write_date('1');delay(1);
zhankongbidisplay();
}
if(h==2)
{
h=0;
init_lcd();
initclock();
display();
}
}
}
if(h==1)
{
if(boxing==1)
{
if(s5==0)
{
delay(5);
if(s5==0)
{
while(!s5);
zhankongbi++;
if(zhankongbi==18)
{
zhankongbi=17;
}
zhankongbiplay();
}
}
if(s6==0)
{
delay(5);
if(s6==0)
{
while(!s6);
zhankongbi--;
zhankongbidisplay();
}
}
}
}
}
void main() //主函数
{
init_lcd();
hc=15625/pinlv;
m=hc*geshu;
m-=54;
m/=15;
initclock();
display();
// csda=0;
// wr=0;
while(1)
{
switch(boxing)
{
case 0: P2=sin[u];
break;
case 1: P2=juxing[u];
break;
case 2: P2=sanjiao[u];
break;
case 3: P2=juchi[u];
break;
}
u+=geshu;
n=m;
if(u>=64)
{
u=0;
}
while(n-->0);
}
}
void T0_time()interrupt 1 //定时器
{
// TH0=a;
// TL0=b;
TH0=0;
TL0=0;
if(h==0)
{
keyscan();
}
bujinjiance();
}
只看到你占空比数据zhankongbi加减和显示，没有看到你去发送，你是固定波形的，好像不好改占空比吧？