有人知道1602和点阵能一起用P0口吗？为什么我的1602没有显示？而且点阵只显示初始化 -

#include <regx51.h>
#include <intrins.h>
#include <absacc.h>
#define uchar unsigned char
#define uint unsigned int
#define PA XBYTE[0x0000]
#define PB XBYTE[0x2000]
#define PC XBYTE[0x4000]
#define COM XBYTE[0x6000]
void delay(uint i){ while(--i);}
uchar num1=0,num2=0;
sbit DQ=P2^3;
sbit jr=P2^4;
sbit row0=P3^0;sbit row1=P3^1;sbit col0=P3^2;
sbit col1=P3^3;sbit col2=P3^4;sbit col3=P3^5;
sbit RS=P2^0; //1=数据；0=命令
sbit RW=P2^1; //1=读；0=写
sbit E=P2^2; //1=使能；0=禁止
#define Dat1602 P0 /** 数据端口 **/
sbit BF=Dat1602^7; /** 忙信号线 **/
uchar code zm[][8]={
0x1C,0x22,0x32,0x2A,0x26,0x22,0x1C,0x00, // -0-
0x08,0x0C,0x08,0x08,0x08,0x08,0x1C,0x00, // -1-
0x1C,0x22,0x20,0x18,0x04,0x02,0x3E,0x00, // -2-
0x3E,0x20,0x10,0x18,0x20,0x22,0x1C,0x00, // -3-
0x10,0x18,0x14,0x12,0x3E,0x10,0x10,0x00, // -4-
0x3E,0x02,0x1E,0x20,0x20,0x22,0x1C,0x00, // -5-
0x38,0x04,0x02,0x1E,0x22,0x22,0x1C,0x00, // -6-
0x3E,0x20,0x10,0x08,0x04,0x04,0x04,0x00, // -7-
0x1C,0x22,0x22,0x1C,0x22,0x22,0x1C,0x00, // -8-
0x1C,0x22,0x22,0x3C,0x20,0x10,0x0E,0x00, // -9-
0x00,0x00,0x04,0x08,0xDE,0x90,0x88,0x9C, //初始化
0x00,0x00,0x00,0x00,0x87,0x44,0xF4,0xA4,
0x00,0x00,0x00,0x10,0x08,0x24,0x7D,0x00,
0x00,0x00,0x04,0x12,0x93,0x52,0x32,0x1A,
0xAA,0x88,0x48,0x28,0x08,0x00,0x00,0x00,
0x44,0xA4,0x04,0x06,0x04,0x00,0x00,0x00,
0x3C,0x24,0x24,0x3C,0x00,0x00,0x00,0x00,
0x12,0x12,0x12,0x92,0xE2,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //不亮 18
0x02,0xF5,0x0A,0x08,0x08,0x08,0x08,0xF0, //℃ 19
};
uchar key(void)
{
uchar k=25,n;
COM=0x8a;
PC=0xfe;
n=PC;
n&=0xf0;
if(n!=0xf0)
{
switch(n)
{
case 0xe0:k=0;break;
case 0xd0:k=1;break;
case 0xb0:k=2;break;
case 0x70:k=3;break;
}
while(PC!=0xfe);
}
else k=25;
return k;
}
//初始化DS18B20，成功返回0，失败返回1
bit STA_1820(void){
bit ack;
DQ=1;delay(5);
DQ=0;delay(80); //拉低总线480～960μS
DQ=1;delay(5); //拉高等待15～60μS
ack=DQ;delay(50); //读应答位并延时480μS以上
return ack;
}
//读DS18B20一字节，返回读到的数
char Read_1820(void){
unsigned char i,dat=0;
for(i=0;i<8;i++){
DQ=0; dat>>=1; //拉低，右移兼延时
DQ=1; if(DQ)dat|=0x80; //拉高，读数据
delay(7); //延时使总时间>60μS
}
return(dat);
}
//向DS18B20写一字节，参数为要写的数
void Write_1820(unsigned char dat){
unsigned char i;
for(i=0;i<8;i++)
{
DQ=0; //拉低开始
DQ=dat&0x01; delay(7);//送数并保持60μS以上
DQ=1; dat>>=1; //拉高，右移准备下一位
}
}
//启动温度转换
void startTemperature(){
if(STA_1820())return;
Write_1820(0xcc);
Write_1820(0x44);
}
//读温度
int readTemperature(void) {
unsigned char TCL,TCH;
STA_1820();
Write_1820(0xcc);
Write_1820(0xbe);
TCL = Read_1820();
TCH = Read_1820();
return (TCH*0x100+TCL)*0.0625;
}
uchar buf[8];
void dis(){
uchar i,n;
uint row=0x01;
for(i=0;i<16;i++){
n=i<8?0:1;
P0=zm[buf[0+4*n]][i-8*n]; col0=1;col0=0;
P0=zm[buf[1+4*n]][i-8*n]; col1=1;col1=0;
P0=zm[buf[2+4*n]][i-8*n]; col2=1;col2=0;
P0=zm[buf[3+4*n]][i-8*n]; col3=1;col3=0;
P0=row%0x100; row0=1;row0=0;
P0=row/0x100; row1=1;row1=0;
delay(50);
row=_irol_(row,1);
P0=0;
row0=row1=col0=col1=col2=col3=1;
row0=row1=col0=col1=col2=col3=0;
}
}
/** LCM忙检测 **/
bit busy1602(){
bit busy=0; //暂存标志
Dat1602=0xff; //口线置1，防止干扰
RS=0; RW=1; //置“命令、读”模式
E=1; E=1; //使能，写两次做短延时
busy=BF;E=0; //暂存标志，关闭使能
return busy; //返回忙信号，1=忙
}
/** 写命令参数：comDat为要发送的命令 **/
void WriteComm(uchar comDat){
while (busy1602()); //忙，则等待
RS=0;RW=0; //置“命令、写”模式
Dat1602=comDat;E=1;E=0; //送出命令，并使之有效
}
/** 写数据参数：dat为要发送的数据 **/
void WriteData(uchar dat){
while (busy1602()); //忙，则等待
RS=1;RW=0; //置“数据、写”模式
Dat1602=dat;E=1;E=0; //送出数据，并使之有效
}
void Init1602(){
WriteComm(0x38);//8位，两行，5*7点阵
WriteComm(0x0c);//显示开，光标关
WriteComm(0x06);//默认，光标右移
WriteComm(1); //清显示
}
uint i=55500,j;
uint k;
bit z=0,x=0,c=0,v=0;
void init()
{
buf[0]=10;buf[1]=11;buf[2]=12;buf[3]=13; //显示初始化
buf[4]=14;buf[5]=15;buf[6]=16;buf[7]=17;
Init1602();
WriteComm(0x80+4);//光标到第1行，第6位
WriteData('W');WriteData('e');WriteData('l');WriteData('c');
WriteData('o');WriteData('m');WriteData('e');WriteData('!');
WriteComm(1); //清屏
WriteComm(0x80+1);//光标到第1行，第2位
WriteData('W');WriteData(':');WriteData(' ');WriteData(num1/10%10+'0');WriteData(num1%10+'0');WriteData(' ');
WriteData('Y');WriteData(':');WriteData(' ');WriteData(num2/10%10+'0');WriteData(num2%10+'0');
WriteComm(0xc0+1);//光标到第2行，第6位
WriteData('Z');WriteData('t');WriteData(':');
WriteData('S');WriteData('t');WriteData('a');WriteData('y');WriteData(' ');
WriteData('h');WriteData('o');WriteData('t');
while(i>0){dis();i--;}
}
void main(){
COM=0X8A;
TMOD=0x01;
EA=ET0=TR0=1;
init();
while(1){
EA=0; startTemperature(); EA=1; //启动温度转换
EA=0; j=readTemperature();EA=1; //读温度值
buf[0]=j/10;buf[1]=j%10;buf[2]=19;buf[3]=18;
buf[4]=18;buf[5]=18;buf[6]=18;buf[7]=18;
dis();
if(key()==0){c=1;x=0;break;}
if(key()==1){
WriteComm(1);
buf[0]=18;buf[1]=18;buf[2]=18;buf[3]=18;
buf[4]=18;buf[5]=18;buf[6]=18;buf[7]=18;
dis();
x=1;
}
if(key()==2){
WriteComm(0xc0+4);//光标到第2行，第1位
WriteData('P');WriteData('a');WriteData('u');WriteData('s');WriteData('e');WriteData(' ');
WriteData(' ');WriteData(' ');WriteData(' ');WriteData(' ');WriteData(' ');WriteData(' ');
v=1;z=0;
}
if(key()==3){
WriteComm(0xc0+4);//光标到第2行，第1位
WriteData('R');WriteData('u');WriteData('n');WriteData(' ');WriteData(' ');WriteData(' ');
WriteData(' ');WriteData(' ');WriteData(' ');WriteData(' ');WriteData(' ');WriteData(' ');
z=1;v=0;
}
if(j<45&&z==1&&v==0){jr=0;}
else jr=1;
}
}
void TIME0() interrupt 1
{
TH0=0xfc;
TL0=0x17;
//dis();
}

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