标题:
单片机C语言: error C202: 'j': undefined identifier
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作者:
strong_g
时间:
2019-1-21 10:59
标题:
单片机C语言: error C202: 'j': undefined identifier
#include<reg52.h> //52系列单片机头文件
#define uchar unsigned char; //宏定义
#define uint unsigned int;
sbit key1=P3^4; //申明键盘口
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit dula=P2^6; //申明U2锁存器锁存端
sbit wela=P2^7; //申明U3锁存器锁存端
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; //数码管段选数组
void delayms(uint);
uchar numt0,num;
void display(uchar numdis)
{
uchar shi,ge; //分离两个分别要显示的数
shi=numdis/10; //十位
ge=numdis%10; //个位
P0=0xff; //消影
wela=1; //打开U3锁存端
P0=0xfe; //送入位选信号
wela=0; //关闭U3锁存端
dula=1; //打开U2锁存端
P0=table[shi]; //送入十位段选信号
dula=0; //关闭U2锁存端
delayms(5); //延时
P0=0xff; //消影
wela=1; //打开U3锁存端
P0=0xfd; //送入位选信号
wela=0; //关闭U3锁存端
dula=1; //打开U2锁存端
P0=table[ge]; //送入个位段选信号
dula=0; //关闭U2锁存端
delayms(5);
}
void delayms(uint ys)
{
uint i,j;
for(i=ys;i>0;i--) //i=ys 即延时约ys毫秒
for(j=110;j>0;j--);
}
void init() //初始化中断函数
{
TMOD=0x01; //设置定时器0为工作方式1（0000 0001）
TH0=(65536-45872)/256; //装初值50ms一次中断
TL0=(65536-45872)%256;
EA=1; //开总中断
ET0=1; //开定时器0中断
}
void keyscan()
{
if(key1==0)
{
delayms(10);
if(key1==0)
{
num++;
if(num==60) //到60次时重新归0
num=0;
while(!key1); //等待按键释放
}
}
if(key2==0)
{
delayms(10);
if(key2==0)
{
if(num==0) //当到0时重新归60
num=60;
num--;
while(!key2);
}
}
if(key3==0)
{
delayms(10);
if(key3==0)
{
num=0; // 清0
while(!key3);
}
}
if(key4==0)
{
delayms(10);
if(key4==0)
{
while(!key4);
TR0=~TR0; //启动或停止定时器0
}
}
}
void main()
{
init(); //初始化函数
while(1)
{
keyscan();
display(num);
}
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256; //重装初值
TL0=(65536-45872)%256;
numt0++;
if(numt0==20)
{
numt0=0;
num++;
if(num==60)
num=0;
}
}
作者:
NGC
时间:
2019-1-21 16:18
#define后面不用加分号，去掉分号就可以了
作者:
13058240662
时间:
2019-1-21 21:45
那两个
作者:
累不死的狗
时间:
2019-1-21 21:46
#include<reg52.h> //52????????
#define uchar unsigned char //???
#define uint unsigned int
sbit key1=P3^4; //?????
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit dula=P2^6; //??U2??????
sbit wela=P2^7; //??U3??????
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; //???????
void delayms(uint);
uchar numt0,num;
void display(uchar numdis)
{
uchar shi,ge; //???????????
shi=numdis/10; //??
ge=numdis%10; //??
P0=0xff; //??
wela=1; //??U3???
P0=0xfe; //??????
wela=0; //??U3???
dula=1; //??U2???
P0=table[shi]; //????????
dula=0; //??U2???
delayms(5); //??
P0=0xff; //??
wela=1; //??U3???
P0=0xfd; //??????
wela=0; //??U3???
dula=1; //??U2???
P0=table[ge]; //????????
dula=0; //??U2???
delayms(5);
}
void delayms(uint ys)
{
uint i,j;
for(i=ys;i>0;i--) //i=ys ????ys??
for(j=110;j>0;j--);
}
void init() //???????
{
TMOD=0x01; //?????0?????1(0000 0001)
TH0=(65536-45872)/256; //???50ms????
TL0=(65536-45872)%256;
EA=1; //????
ET0=1; //????0??
}
void keyscan()
{
if(key1==0)
{
delayms(10);
if(key1==0)
{
num++;
if(num==60) //?60?????0
num=0;
while(!key1); //??????
}
}
if(key2==0)
{
delayms(10);
if(key2==0)
{
if(num==0) //??0????60
num=60;
num--;
while(!key2);
}
}
if(key3==0)
{
delayms(10);
if(key3==0)
{
num=0; // ?0
while(!key3);
}
}
if(key4==0)
{
delayms(10);
if(key4==0)
{
while(!key4);
TR0=~TR0; //????????0
}
}
}
void main()
{
init(); //?????
while(1)
{
keyscan();
display(num);
}
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256; //????
TL0=(65536-45872)%256;
numt0++;
if(numt0==20)
{
numt0=0;
num++;
if(num==60)
num=0;
}
}#include<reg52.h> //52????????
#define uchar unsigned char //???
#define uint unsigned int
sbit key1=P3^4; //?????
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit dula=P2^6; //??U2??????
sbit wela=P2^7; //??U3??????
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; //???????
void delayms(uint);
uchar numt0,num;
void display(uchar numdis)
{
uchar shi,ge; //???????????
shi=numdis/10; //??
ge=numdis%10; //??
P0=0xff; //??
wela=1; //??U3???
P0=0xfe; //??????
wela=0; //??U3???
dula=1; //??U2???
P0=table[shi]; //????????
dula=0; //??U2???
delayms(5); //??
P0=0xff; //??
wela=1; //??U3???
P0=0xfd; //??????
wela=0; //??U3???
dula=1; //??U2???
P0=table[ge]; //????????
dula=0; //??U2???
delayms(5);
}
void delayms(uint ys)
{
uint i,j;
for(i=ys;i>0;i--) //i=ys ????ys??
for(j=110;j>0;j--);
}
void init() //???????
{
TMOD=0x01; //?????0?????1(0000 0001)
TH0=(65536-45872)/256; //???50ms????
TL0=(65536-45872)%256;
EA=1; //????
ET0=1; //????0??
}
void keyscan()
{
if(key1==0)
{
delayms(10);
if(key1==0)
{
num++;
if(num==60) //?60?????0
num=0;
while(!key1); //??????
}
}
if(key2==0)
{
delayms(10);
if(key2==0)
{
if(num==0) //??0????60
num=60;
num--;
while(!key2);
}
}
if(key3==0)
{
delayms(10);
if(key3==0)
{
num=0; // ?0
while(!key3);
}
}
if(key4==0)
{
delayms(10);
if(key4==0)
{
while(!key4);
TR0=~TR0; //????????0
}
}
}
void main()
{
init(); //?????
while(1)
{
keyscan();
display(num);
}
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256; //????
TL0=(65536-45872)%256;
numt0++;
if(numt0==20)
{
numt0=0;
num++;
if(num==60)
num=0;
}
}
作者:
累不死的狗
时间:
2019-1-21 21:46
格式的问题，真得需要注意
作者:
13058240662
时间:
2019-1-21 21:47
那两个#define后面不用分号，去掉就可以
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