51單片機矩陣鍵盤程序語句調試問題

ID:477073 · 發表于 2019-2-24 12:01

這個矩陣鍵盤的，怎么改變剛打開單片機還沒有按鍵時數碼管顯示的符號，加上圖二這三句沒有改變顯示的字符，求大佬指教

ID:213173 · 發表于 2019-2-24 16:28

/************* IO口定義 **************/
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[]={ //段碼標準字庫
//    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,
//  不顯 - 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}; //位碼

/**************** 向HC595發送一個字節函數 ******************/

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;
}
}
/********************** 顯示掃描函數 ************************/

void DisplayScan(void)
{
Send_595(~LED_TYPE ^ T_COM[display_index]); //輸出位碼
Send_595( LED_TYPE ^ t_display[LED8[display_index]]); //輸出段碼

P_HC595_RCLK = 1;
P_HC595_RCLK = 0; //鎖存輸出數據
if(++display_index >= 8)
display_index = 0; //8位結束回0
}

ID:213173 · 發表于 2019-2-24 20:05

初始顯示字母示例程序
#include <reg52.h>
#define uint unsigned int //宏定義無符號整型數據
#define uchar unsigned char //宏定義無符號字符型數據

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

uchar  code table[]={//共陰數碼管段碼"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};//位碼
uchar buf[8];

uchar key=0; //定義鍵值全局變量

void keyscan() //按鍵掃描程序
{
static bit sign=0; //按鍵有效標志
static uint count=0; //消抖計數變量
uchar num=0; //臨時變量
P3=0xf0; //賦值P3 1111 0000
if(P3!=0xf0) //檢測有按鍵按下
{
count++; //消抖計數
if((count>=500)&&(sign==0))//100~1000，根據主循環周期調整約10~20ms
{
sign=1; //按鍵有效標志置1
num=P3; //保存P3值xxxx 0000，x為0或1
num|=0x0f; //保存num按位或0x0f值xxxx 1111
P3=num; //賦值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 //鍵抬起
{
sign=0; //按鍵有效標志清0
count=0; //消抖計數清0
}
}
/**************** 向HC595發送一個字節函數 ******************/
void Send_595(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
dat <<= 1;
P_HC595_SER  = CY; //溢出位賦值數據輸出端
P_HC595_SRCLK = 1; //移位時鐘
P_HC595_SRCLK = 0;
}
}
/**************** 向HC595發送2個字節函數 ******************/
void DisplayScan()
{
static uchar j;
Send_595(dis_buf[j]);//向HC595發送位碼
Send_595(table[buf[j]]);//向HC595發送段碼
P_HC595_RCLK = 1;//鎖存輸出數據
P_HC595_RCLK = 0;
if(++j==8)
j=0;
}

void main() //主函數
{
uchar i;
P_HC595_SRCLK = 0;//初始化移位時鐘端
P_HC595_RCLK  = 0;//初始化鎖存輸出端
while(1)
{
keyscan(); //按鍵掃描程序
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(); //發送2個字節
}
}
}

ID:213173 · 發表于 2019-2-25 07:50

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51單片機矩陣鍵盤程序語句調試問題