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LCD1602操作程序
#define LCD_DB P0
sbit LCD_RS = P2^4;
sbit LCD_RW = P2^5;
sbit LCD_E = P2^6;
/**********************************************************/
void delay_n40us(unsigned int n)
{
unsigned int i;
unsigned char j;
for(i=n;i>0;i--)
for(j=0;j<2;j++);
}
/**********************************************************/
void LCD_write_command(unsigned char dat)
{
LCD_DB = dat;
LCD_RS = 0;
LCD_E = 1;
LCD_E = 0;
delay_n40us(1);
}
/**********************************************************/
void LCD_write_data(unsigned char dat)
{
LCD_DB = dat;
LCD_RS = 1;
LCD_RW = 0;
LCD_E = 1;
LCD_E = 0;
delay_n40us(1);
}
/**********************************************************/
void LCD_disp_char(unsigned char x,unsigned char y,unsigned char dat)
{
unsigned char address;
if(y==1)
address = 0x80 + x;
else
address = 0xc0 + x;
LCD_write_command(address);
LCD_write_data(dat);
}
/**********************************************************/
void LCD_check_busy(void)
{
do{
LCD_E = 0;
LCD_RS = 0;
LCD_RW = 1;
LCD_DB = 0xff;
LCD_E = 1;
}while(LCD_DB^7 == 1);
}
/**********************************************************/
void LCD_init(void)
{
LCD_write_command(0x38);
LCD_write_command(0x0c);
LCD_write_command(0x06);
LCD_write_command(0x01);
delay_n40us(100);
}
/**********************************************************/