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#include<reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit E=P1^2; sbit RS=P1^0; sbit RW=P1^1; sbit key1=P1^3; sbit key2=P1^4; sbit key3=P1^5; sbit key4=P1^6; sbit key5=P1^7;
void lcd_init();
void write_comm(uchar);
void write_data(uchar);
void write_string(uchar,uchar,uchar *);
void lcd_delay();
void delay_ms(uint);
void delay_ms(uint i) // 延時 i 毫秒
{
uint j;
while(i--)
{
for(j=0;j<=74;j++)
{
_nop_();
}
}
}
void lcd_init()
{
lcd_delay();
write_comm(0x38); // 顯示模式控制：設置 16*2 顯示， 5*7 點陣， 8
位數據口
write_comm(0x08); // 關顯示
write_comm(0x01); // 清屏
write_comm(0x06); // 輸入模式控制：光標右移，整屏不移動
write_comm(0x0c); // 開顯示，顯示光標，光標閃爍
//0x0e ，開顯示，顯示下光標，光標不閃爍
write_comm(0x80);
write_comm(0x02); // 數據指針清零
}
void write_comm(uchar i)
{
RS=0; RW=0; P0=i;
lcd_delay(); E=0; lcd_delay(); E=1;
}
void write_data(uchar i)
{
RS=1; RW=0; P0=i;
lcd_delay(); E=0; lcd_delay(); E=1;
}
void write_string(uchar row,uchar column,uchar *dis_buffer)
{
switch(row) // 這種結構保持以后升級到多行顯示液晶
{
地址指針
}
case 1:write_comm(0x80+column);break;
case 2:write_comm(0x80+0x40+column);break;// 重新調整數據
default:break;
while(*dis_buffer!='\0') // '\0' 結束符
{
write_data(*dis_buffer);
dis_buffer++;
column++;
if(column==16)
{
column=0; row++; if(row>=3)
return; else switch(row)
// 這種結構保持以后升級到多行顯示液晶
{
case 1:write_comm(0x80);break;
case 2:write_comm(0x80+0x40);break;
// 重新調整數據地址指針
default:break;
}
}
}
}
void lcd_delay()
{
uchar i;
for(i=0;i<255;i++);
}
void main()
{
lcd_init();
//cntl1=1;cntl3=1; cntl2=0;cntl4=0;cntl5=1;cntl6=0;
write_string(1,0,"Gain:");
while(1)
{
if(key1==0)
{
delay_ms(15);
if(key1==0)
{
while(!key1); P2=0x02;
write_string(2,0,"0dB");
}
}
if(key2==0)
{
delay_ms(15);
if(key2==0)
{
while(!key2); P2=0x08;
write_string(2,0,"10dB");
}
}
if(key3==0)
{
delay_ms(15);
if(key3==0)
{
while(!key3); P2=0x1A;
write_string(2,0,"20dB");
}
}
if(key4==0)
{
delay_ms(15);
if(key4==0)
{
while(!key4); P2=0x51;
write_string(2,0,"30dB");
}
}
if(key5==0)
{
delay_ms(15);
if(key5==0)
{
while(!key5); P2=0xff;
write_string(2,0,"40dB");
}
}
}
}

復制代碼

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