51单片机矩阵键盘程序语句调试问题

ID:477073 · 发表于 2019-2-24 12:01

这个矩阵键盘的，怎么改变刚打开单片机还没有按键时数码管显示的符号，加上图二这三句没有改变显示的字符，求大佬指教

ID:213173 · 发表于 2019-2-24 16:28

/************* IO口定义 **************/
sbit P_HC595_SER = P2^5; //SER data input
sbit P_HC595_RCLK  = P2^6; //RCLk store (latch) clock
sbit P_HC595_SRCLK = P2^7; //SRCLK Shift data clock

unsigned char code t_display[]={ //段码标准字库
//    0 1 2 3 4 5 6 7 8 9 A B C D E F
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
//  不显 - H J    K    L    N o P    U t G Q r M y
0x00,0x40,0x76,0x1E,0x70,0x38,0x37,0x5C,0x73,0x3E,0x78,0x3d,0x67,0x50,0x37,0x6e,
// 0.  1. 2. 3. 4. 5. 6. 7. 8. 9. -1
0xBF,0x86,0xDB,0xCF,0xE6,0xED,0xFD,0x87,0xFF,0xEF,0x46};

unsigned char code T_COM[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80}; //位码

/**************** 向HC595发送一个字节函数 ******************/

void Send_595(u8 dat)
{
u8 i;
for(i=0; i<8; i++)
{
dat <<= 1;
P_HC595_SER = CY;
P_HC595_SRCLK = 1;
P_HC595_SRCLK = 0;
}
}
/********************** 显示扫描函数 ************************/

void DisplayScan(void)
{
Send_595(~LED_TYPE ^ T_COM[display_index]); //输出位码
Send_595( LED_TYPE ^ t_display[LED8[display_index]]); //输出段码

P_HC595_RCLK = 1;
P_HC595_RCLK = 0; //锁存输出数据
if(++display_index >= 8)
display_index = 0; //8位结束回0
}

ID:213173 · 发表于 2019-2-24 20:05

初始显示字母示例程序
#include <reg52.h>
#define uint unsigned int //宏定义无符号整型数据
#define uchar unsigned char //宏定义无符号字符型数据

sbit P_HC595_SER = P2^0;
sbit P_HC595_SRCLK = P2^1;
sbit P_HC595_RCLK  = P2^2;

uchar  code table[]={//共阴数码管段码"0~H"
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
// A B C D E F G H
0x77,0x7C,0x39,0x5E,0x79,0x71,0x3d,0x76};

uchar code dis_buf[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//位码
uchar buf[8];

uchar key=0; //定义键值全局变量

void keyscan() //按键扫描程序
{
static bit sign=0; //按键有效标志
static uint count=0; //消抖计数变量
uchar num=0; //临时变量
P3=0xf0; //赋值P3 1111 0000
if(P3!=0xf0) //检测有按键按下
{
count++; //消抖计数
if((count>=500)&&(sign==0))//100~1000，根据主循环周期调整约10~20ms
{
sign=1; //按键有效标志置1
num=P3; //保存P3值xxxx 0000，x为0或1
num|=0x0f; //保存num按位或0x0f值xxxx 1111
P3=num; //赋值P3 xxxx 1111
num=P3; //保存P3值xxxx xxxx
switch(num)
{
case 0xee: key= 1; break;
case 0xde: key= 2; break;
case 0xbe: key= 3; break;
case 0x7e: key= 4; break;
case 0xed: key= 5; break;
case 0xdd: key= 6; break;
case 0xbd: key= 7; break;
case 0x7d: key= 8; break;
case 0xeb: key= 9; break;
case 0xdb: key=10; break;
case 0xbb: key=11; break;
case 0x7b: key=12; break;
case 0xe7: key=13; break;
case 0xd7: key=14; break;
case 0xb7: key=15; break;
case 0x77: key=16; break;
}
}
}
else //键抬起
{
sign=0; //按键有效标志清0
count=0; //消抖计数清0
}
}
/**************** 向HC595发送一个字节函数 ******************/
void Send_595(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
dat <<= 1;
P_HC595_SER  = CY; //溢出位赋值数据输出端
P_HC595_SRCLK = 1; //移位时钟
P_HC595_SRCLK = 0;
}
}
/**************** 向HC595发送2个字节函数 ******************/
void DisplayScan()
{
static uchar j;
Send_595(dis_buf[j]);//向HC595发送位码
Send_595(table[buf[j]]);//向HC595发送段码
P_HC595_RCLK = 1;//锁存输出数据
P_HC595_RCLK = 0;
if(++j==8)
j=0;
}

void main() //主函数
{
uchar i;
P_HC595_SRCLK = 0;//初始化移位时钟端
P_HC595_RCLK  = 0;//初始化锁存输出端
while(1)
{
keyscan(); //按键扫描程序
if(key==0)
{
buf[0]=10;
buf[1]=11;
buf[2]=12;
buf[3]=13;
buf[4]=14;
buf[5]=15;
buf[6]=16;
buf[7]=17;
}
else
{
buf[0]=0;
buf[1]=0;
buf[2]=0;
buf[3]=0;
buf[4]=0;
buf[5]=0;
buf[6]=key/10;
buf[7]=key%10;
}
if(++i>=100)
{
i=0;
DisplayScan(); //发送2个字节
}
}
}

ID:213173 · 发表于 2019-2-25 07:50

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