共同来学下单片机的键盘编程

wolfliu_67

共同来学下单片机的键盘编程 [复制链接]

先看硬件图,再来共同学习4×4的键盘编程!

在来看这个键盘的原程序.但在keil 里最后有问题.请指点下!
原程序附下:

#include
   unsigned char table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
      void delay(void)
   {
      unsigned char i,j;                   //函数功能：延时子程序
   for(i=0;i<20;i++)
   for(j=0;j<250;j++);
   }
      void display(unsigned char i)          //函数功能：LED显示子程序
      {
   P2=0xfe;
   P0=table;
   }
      void keyscan(void)
   {
      unsigned char n;
P3=0xfe;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
   delay();
      P3=0xfe;
   n=P3;
   n&=0xf0;
   if(n!= 0xf0)
   {
      switch(n)
   {
case(0xe0):display(3);break;
case(0xd0):display(2);break;
case(0xb0):display(1);break;
case(0x70):display(0);break;
}
}
}
            P1=0xfd;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xfd;
n=P3;
n&=0xf0;
if(n!= 0xf0)
{
switch(n)
{
case(0xe0):display(7);break;
case(0xd0):display(6);break;
case(0xb0):display(5);break;
case(0x70):display(4);break;
}
}
}
               P3=0xfb;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xfb;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
switch(n)
{
case(0xe0):display(11);break;
      case(0xd0):display(10);break;
case(0xb0):display(9);break;
case(0x70):display(8);break;
}
}
}
            P3=0xf7;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xf7;
n=P3;
   n&=0xf0;
if(n!=0xf0)
   {
switch(n)
{
         case(0xe0):display(15);break;
case(0xd0):display(14);break;
case(0xb0):display(13);break;
case(0x70):display(12);break;
}
}
}
   void main()       这句提示有错希望能改正 {
while(1)
{
keyscan();
}
         }

ruoruo1997

错误信息是啥

amzip

少了个}

csfcsf

这是原程序：错误的提示是：syntax error near 'void'if(n!=0xf0)
   {
switch(n)
{
         case(0xe0):display(15);break;
case(0xd0):display(14);break;
case(0xb0):display(13);break;
case(0x70):display(12);break;
}
}

#include
   unsigned char table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
      void delay(void)
   {
      unsigned char i,j;                   //函数功能：延时子程序
   for(i=0;i<20;i++)
   for(j=0;j<250;j++);
   }
      void display(unsigned char i)          //函数功能：LED显示子程序
      {
   P2=0xfe;
   P0=table;
   }
      void keyscan(void)
   {
      unsigned char n;
P3=0xfe;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
   delay();
      P3=0xfe;
   n=P3;
   n&=0xf0;
   if(n!= 0xf0)
   {
      switch(n)
   {
case(0xe0):display(3);break;
case(0xd0):display(2);break;
case(0xb0):display(1);break;
case(0x70):display(0);break;
}
}
}
            P1=0xfd;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xfd;
n=P3;
n&=0xf0;
if(n!= 0xf0)
{
switch(n)
{
case(0xe0):display(7);break;
case(0xd0):display(6);break;
case(0xb0):display(5);break;
case(0x70):display(4);break;
}
}
}
               P3=0xfb;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xfb;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
switch(n)
{
case(0xe0):display(11);break;
      case(0xd0):display(10);break;
case(0xb0):display(9);break;
case(0x70):display(8);break;
}
}
}
            P3=0xf7;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xf7;
n=P3;
   n&=0xf0;
}
   void main(void) 这句提示是有错！
{
while(1)
{
keyscan();
}
         }

kgood

这是原程序：错误的提示是：syntax error near ＇void＇

#include
   unsigned char table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
      void delay(void)
   {
      unsigned char i,j;                   //函数功能：延时子程序
   for(i=0;i<20;i++)
   for(j=0;j<250;j++);
   }
      void display(unsigned char i)          //函数功能：LED显示子程序
      {
   P2=0xfe;
   P0=table;
   }
      void keyscan(void)
   {
      unsigned char n;
P3=0xfe;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
   delay();
      P3=0xfe;
   n=P3;
   n&=0xf0;
   if(n!= 0xf0)
   {
      switch(n)
   {
case(0xe0):display(3);break;
case(0xd0):display(2);break;
case(0xb0):display(1);break;
case(0x70):display(0);break;
}
}
}
            P1=0xfd;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xfd;
n=P3;
n&=0xf0;
if(n!= 0xf0)
{
switch(n)
{
case(0xe0):display(7);break;
case(0xd0):display(6);break;
case(0xb0):display(5);break;
case(0x70):display(4);break;
}
}
}
               P3=0xfb;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xfb;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
switch(n)
{
case(0xe0):display(11);break;
      case(0xd0):display(10);break;
case(0xb0):display(9);break;
case(0x70):display(8);break;
}
}
}
            P3=0xf7;
n=P3;
n&=0xf0;
if(n!=0xf0)
{
delay();
P3=0xf7;
n=P3;
   n&=0xf0;
if(n!=0xf0)
   {
switch(n)
{
         case(0xe0):display(15);break;
case(0xd0):display(14);break;
case(0xb0):display(13);break;
case(0x70):display(12);break;
}
}
}
   void main(void) 这句提示是有错望改正过来！
{
while(1)
{
keyscan();
}
         }

jiangnan0556

晕void main() 前加个｝

shenjl

好了,能够运行了,但是不能仿真呀!

rexuenanerhua

扫个键盘用得着这么长的代码?

不是吧???

211wujianhua

这个键盘扫描程序真的有一些太长了

ywlgjy

好长,可以用循环,节约空间

yushulei

看不见图

taoweiwen

用高版本的keil 吧，比如7.5，少{}之类的错误就不会了

xiany_wj

直接用芯片吧!zlg7289 方便又好用!

共同来学下单片机的键盘编程 [复制链接]

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