mega16写1602程序，第二行不显示
为什么第二行不显示，代码没错啊跪求大神指导！！！
#include<iom16v.h>
#include<macros.h>
#define uint unsigned int
#define uchar unsigned char
#pragma data:code
const uchar table1[]={"I LOVE AVR MCU!!"};
const uchar table2[]={"I LOVE STM MCU!!"};
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=1141;y>0;y--);
}
void write_com(uchar com)
{
PORTA=0x3f;
PORTC=com;
PORTA=0x40;
delay(5);
PORTA=0xdf;
}
void write_dat(uchar dat)
{
PORTA=0xbf;
PORTC=dat;
PORTA=0x40;
delay(5);
PORTA=0xdf;
}
void main()
{
uint i;
DDRC=0XFF;
DDRA=0xe0;
PORTA=0x40;
write_com(0x38);
delay(5);
write_com(0x01);
delay(5);
write_com(0x0c);
delay(5);
write_com(0x06);
delay(5);
while(1)
{
write_com(0x80);
for(i=0;i<16;i++)
{
write_dat(table1);
delay(5);
}
write_com(0X80+0x40);
for(i=0;i<16;i++)
{
write_dat(table2);
delay(5);
}
}
while(1);
}
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