水温控制系统

************写数据*********************************/

void

date)

{

read_busy(); lcd_rs=1; delay(5); lcd_rw=0; delay(5); lcd_date=date; lcd_en=0; delay(5); lcd_en=1; delay(5); lcd_en=0; delay(5); }

/**********************

*************写指令*******************************/

void

com)

{

write_com(uchar write_date(uchar

read_busy(); lcd_rs=0; delay(5); lcd_rw=0; delay(5); lcd_date=com; lcd_en=0; delay(5); lcd_en=1; delay(5); lcd_en=0; delay(5); }

/**********************

******判断忙闲状态*******************************/

uchar read_busy() {

lcd_date=0xff; lcd_rs=0; delay(5); lcd_rw=1; delay(5);

lcd_en=1; delay(5);

while(lcd_date&busy); lcd_en=0; delay(5); return(lcd_date); }

/**********************

*清除液晶GDRAM中的随机数据*********************/

void clear_GDRAM() {

uchar i,j,k;

write_com(0x34);

//打开扩展指令集

i = 0x80; for(j = 0;j < 32;j++) {

write_com(i++);

write_com(0x80);

for(k = 0;k <

16;k++)

write_date(0x00);

16;k++)

write_date(0x00);

//回到基本指令集

{

} } i = 0x80;

for(j = 0;j < 32;j++) {

write_com(i++); write_com(0x88);

for(k = 0;k <

{

} }

write_com(0x30);

}