void delay_ms(unsigned int d);
void ScanKeyboard();
void LcdShowStr(unsigned char x,unsigned char y,unsigned char*str);
void LcdShowDat(unsigned char x,unsigned char y,unsigned char dat);
unsigned char cnt=0,w=0,key=0;
unsigned char code KeyCode[]=
{0xe7,0xd7,0xb7,0x77,0xeb,0xdb,0xbb,0x7b,0xed,0xdd,0xdb,0xbd,0x7d,0xee,0xde,0xbe,0x7e};
void main()
{
unsigned char temp;
unsigned char str[]="hello";
TMOD=0X01;
TH0=0X4C;
TL0=0X00;
IE=0X82;
TR0=1;
InitLcd1602();
LcdShowStr(2,0,str);
while(1);
{
temp=w;
LcdShowDat(4,1,temp);
}
}
void LcdWaitReady()
{
unsigned char sta;
LCD1602_DB=0XFF;
LCD1602_RS=0;
LCD1602_RW=1;
do{
LCD1602_E=1;
sta=LCD1602_DB;
LCD1602_E=0;
}
while(sta&0x80);
}
void LcdWriteCmd(unsigned char cmd)
{
LcdWaitReady();
LCD1602_RS=0;
LCD1602_RW=0;
LCD1602_DB=cmd;
LCD1602_E=1;
LCD1602_E=0;
}
void LcdWriteDat(unsigned char dat)
{
LcdWaitReady();
LCD1602_RS=1;
LCD1602_RW=0;
LCD1602_DB=dat;
LCD1602_E=1;
LCD1602_E=0;
}
void LcdSetCursor(unsigned char x,unsigned char y)
{
unsigned char addr;
if(y==0)
addr=0x00+x;
else
addr=0x40+x;
LcdWriteCmd(addr|0x80);
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char*str)
{
LcdSetCursor(x,y);
while(*str!='\0')
{
LcdWriteDat(*str++);
}
}
void LcdShowDat(unsigned char x,unsigned char y,unsigned char dat)
{
LcdSetCursor(x,y);
LcdWriteDat(dat);
}
void InitLcd1602()
{
LcdWriteCmd(0x38);
LcdWriteCmd(0x0c);
LcdWriteCmd(0x06);
LcdWriteCmd(0x01);
}
void ScanKeyboard()
{
unsigned char scan1,scan2,keyboard;
unsigned char i;
P2=0xf0;
scan1=P2;
if((scan1&0xf0)!=0xf0)
{
delay_ms(10);
scan1=P2;
if((scan1&0xf0)!=0xf0)
{
P2=0xf0;
scan2=P2;
keyboard=scan1|scan2;
while((P2&0x0f)!=0x0f)
for(i=0;i<=15;i++)
{
if(keyboard==KeyCode[i])
key=i;
}
}
}
}
void clock()interrupt 1
{
unsigned char key,i;
cnt++;
TH0=0X4C;
TL0=0X00;
ScanKeyboard();
if(key==1)
{
w=0x20;
}
if(key==2)
{
for(i=0;cnt<=20;i++)
{
w=0x61+0x01;
if(i==3)
{
i=0;
w=0x61;
}
}
}
}
void delay_ms(unsigned int d)
{
unsigned char i;
while(d--)
{
for(i=0;i<=110;i++);
}
}
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?PR?_LCDSHOWDAT?ABC
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