单片机按键控制数码管c语言程序,用PIC16F877A单片机驱动按键控制8个数码管的显示的C程序...

经典按键控制数码管C程序

#include

#define HC595_SER RB7

#define HC595_SCK RB6

#define HC595_RCK RB5

#define key_164_data RB3

#define key_164_clk RB2

#define key_com1 RB1

#define key_com0 RB0

#define TURE 1

bit key_finish; //定义的位变量，这是PICmate仿真软件环境的特有的地方

unsigned int sample_key;

unsigned int sample_keyBuf[2];

unsigned int key_value;

unsigned char key_row_sel;

unsigned char key_number;//键号

unsigned int T100ms;

unsigned char disbuf[8];

const unsigned char seven_seg[16]=

{0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

//----------------------------------------------

void disbuf_update(void)

{

if(key_number>=16)

{

disbuf[0]=0xff;

disbuf[1]=0xff;

disbuf[2]=0xff;

disbuf[3]=0xff;

disbuf[4]=0xff;

disbuf[5]=0xff;

disbuf[6]=0xff;

disbuf[7]=0xff;

return;

}

disbuf[0]=seven_seg[key_number];

disbuf[1]=seven_seg[key_number];

disbuf[2]=seven_seg[key_number];

disbuf[3]=seven_seg[key_number];

disbuf[4]=seven_seg[key_number];

disbuf[5]=seven_seg[key_number];

disbuf[6]=seven_seg[key_number];

disbuf[7]=seven_seg[key_number];

}

//----------------------------------------------

void inite_time0(void) //对timer0中断进行初始化

{

PSA=0;

T0CS=0;

T0IF=0;

GIE=1;

T0IE=1;

TMR0=0xf0;

PS0=1;

PS1=1;

PS2=1;

}

//----------------------------------------------

//发送一个字节

void s_pData(unsigned char key) //形参key对应着实参disbuf[i]

{

unsigned char i;

for(i=0;i<8;i++)

{

if(0x80&(key< HC595_SER=1;

else HC595_SER=0;

HC595_SCK=0;

HC595_SCK=1;

}

}

//----------------------------------------------

//发送一个字节

void Key_s_pData(unsigned char key)

{

unsigned char i;

for(i=0;i<8;i++)

{

if(0x80&(key< key_164_data=1;

else

key_164_data=0;

key_164_clk=0;

key_164_clk=1;

}

}

//----------------------------------------------

void display (void)

{

unsigned char i;

for(i=0;i<8;i++)

s_pData(disbuf[i]);

HC595_RCK=0;

HC595_RCK=1;

}

//----------------------------------------------

void key_process(void)

{

unsigned char i;

for(i=0;i<16;i++)

{

if( (key_value&(0x0001< {

key_number=i;

return;

}

}

}

//----------------------------------------------

//主程序

int main(void)

{

PORTB=0;

TRISB=0x03;

inite_time0();

key_number=0xff;

while(1)

{

if(key_finish==TURE)

{//按键扫描成功

key_process();

key_finish=0;

}

if(T100ms<10)

continue;