51 單片機(jī)綜合學(xué)習(xí)系統(tǒng)之 1602字符型液晶顯示篇

10．8．3．2 程序流程圖

圖10-61 軟件流程圖

10．8．3．3 軟件代碼

#include

#include

sbit rs= P2^0;

sbit rw = P2^1;

sbit ep = P2^2;

unsigned char code dis1[] = {"www.hificat.com"};

unsigned char code dis2[] = {"0571-85956028"};

void delay(unsigned char ms)

{

unsigned char i;

while(ms--)

{

for(i = 0; i< 250; i++)

{

_nop_();

_nop_();

_nop_();

_nop_();

}

}

}

bit lcd_bz()

{

bit result;

rs = 0;

rw = 1;

ep = 1;

_nop_();

_nop_();

_nop_();

_nop_();

result = (bit)(P0 & 0x80);

ep = 0;

return result;

}

void lcd_wcmd(unsigned char cmd)

{

while(lcd_bz());//判斷LCD是否忙碌

rs = 0;

rw = 0;

ep = 0;

_nop_();

_nop_();

P0 = cmd;

_nop_();

_nop_();

_nop_();

_nop_();

ep = 1;

_nop_();

_nop_();

_nop_();

_nop_();

ep = 0;

}

void lcd_pos(unsigned char pos)

{

lcd_wcmd(pos | 0x80);

}

void lcd_wdat(unsigned char dat)

{

while(lcd_bz());//判斷LCD是否忙碌

rs = 1;

rw = 0;

ep = 0;

P0 = dat;

_nop_();

_nop_();

_nop_();

_nop_();

ep = 1;

_nop_();

_nop_();

_nop_();

_nop_();

ep = 0;

}

void lcd_init()

{

lcd_wcmd(0x38);

delay(1);

lcd_wcmd(0x0c);

delay(1);

lcd_wcmd(0x06);

delay(1);

lcd_wcmd(0x01);

delay(1);

}

void main(void)

{

unsigned char i;

lcd_init();// 初始化LCD

delay(10);

lcd_pos(0x01);//設(shè)置顯示位置

i = 0;

while(dis1[i] != /0)

{

lcd_wdat(dis1[i]);//顯示字符

i++;

}

lcd_pos(0x42);// 設(shè)置顯示位置

i = 0;

while(dis2[i] != /0)

{

lcd_wdat(dis2[i]);// 顯示字符

i++;

}

while(1);

}