单片机：lcd问题！求助！！！！！

大神们！求助！lcd1602液晶显示屏只显示一行，想在第二行显示为何都显示不出来？求助！！！

#include
#include
#define uint unsigned int
#define uchar unsigned char
#define lcd P0
***it rs=P2^6;
***it rw=P2^5;
***it e=P2^7;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}

void jianche_bf()
{
char i,x=0x80;
while(x&0x80)
{
rs=0;rw=1;
e=1;
x=lcd;
e=0;
for(i=0;i<10;i++);
}
}

void xiezhiling(char zhiling)
{
rs=0;rw=0;
e=1;
lcd=zhiling;
e=0;
jianche_bf();
}

void xieshuju(char shuju)
{
rs=1;rw=0;
e=1;
lcd=shuju;
e=0;
jianche_bf();
}

void chushihua()
{

xiezhiling(0x38);
xiezhiling(0x0c);
xiezhiling(0x01);
xiezhiling(0x08);
xiezhiling(0x06);
xiezhiling(0x0e);

}
uchar i;
main()
{
uchar a[]="a bcde aaa!";
char b[]="luo xiang cheng ";
chushihua();

while(1)
{
xiezhiling(0x80);
for(i=0;i<16;i++)
xieshuju(b[i]);
delay(1000);

xiezhiling(0x80+0x40);

for(i=0;i<11;i++)
xieshuju(a[i]);
delay(1000);

}
}