JHD164A datasheet(7/10 Pages) ETC2

7 / 10 page

}

void soft_20ms()/***********12MHZ 提供20MS 软件延时************/

{

Soft_10ms();

soft_10ms();

}

void hard_10ms(unsigned int delaytime) /*基于10MS 的硬件延时*/

{

sys10mscounter=delaytime;

while(sys10mscounter);

}

unsigned char data lcdcounter;

bit lcdusing1,lcdusing2;

bit lcd_checkbusy()/*检查LCD 忙*/

{

dc=0;

/*dc=1为数据,=0 为命令.*/

rw=1;

/*rw=1为读,=0 为写.*/

cs=1;

/*cs=1选通.*/

soft_nop();

Lcdstate=lcdbus;

cs=0;

return((bit)(lcdstate&0x80));

}

void lcd_wrcmd(unsigned char lcdcmd) /*写LCD 命令*/

{

lcdusing1=1;

while(lcd_checkbusy());

lcdbus=lcdcmd;

Dc=0;

/*dc=1为数据,=0 为命令.*/

Rw=0;

/*rw=1为读,=0 为写.*/

Cs=1;

/*cs=1选通.*/

soft_nop();

cs=0;

lcdbus=0xff;

lcdusing1=0;

}

void lcd_moveto(char position) /*移动光标到指定位.0-79*/

{ register cmd=0x80;

lcdcounter=position;

if (position > 59)

position += 0x18;

else

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