TMS320F2812驱动LCD12864显示，屏幕不显示，可能是时序问题

/-----LCD12864引脚的设置-----/

GpioMuxRegs.GPBMUX.all=0x0000;//将GPIOB设置为通用数字输入输出通道
GpioMuxRegs.GPBDIR.all=0xFFFF;//将GPIOB的方向设置为输出方向
GpioMuxRegs.GPAMUX.all=0x0000;//将GPIOA设置为通用数字输入输出通道
GpioMuxRegs.GPADIR.all=0xFFFF;//将GPIOA的方向设置为输出方向

/-------显示字符的设置--------------/

char hang1[12]={ "陕","西","科","技","大","学"};
char hang2[8]={ "电","流","1","："};
char hang3[8]= {"电","流","2","："};
char hang4[8]= {"电","流","3","："};
char hang5[8]= {"电","流","4","："};
char hang6[8]= {"电","流","5","："};
char hang7[8]= {"电","流","6","："};

/------LCD初始化-----------/

void Initlcd(void)
{
DELAY_US(4000);//等待时间>40ms
write_LCD_command(0x30);//功能设定：8位数据，基本指令操作
DELAY_US(100);//等待时间>100us
write_LCD_command(0x30);//功能设定：8位数据，基本指令操作
DELAY_US(37);//等待时间>37us
write_LCD_command(0x0C);//显示设定：整体显示，游标关，不反白
DELAY_US(100);//等待时间>100us
write_LCD_command(0x01);//清屏指令
DELAY_US(10000);//等待时间>10ms
write_LCD_command(0x06);//进入点设定：地址指针加1
DELAY_US(1000);
write_LCD_command(0x80);
}

/-------------显示程序------------/

void display1(void)
{
int Num;
write_LCD_command(0x80);
for(Num=0;Num<12;Num++)
{
  write_LCD_data(hang1[num][Num]);
}

write_LCD_command(0x90);//写第二行
for(Num=0;Num<8;Num++)
{
  write_LCD_data(hang2[num][Num]);
}

write_LCD_command(0x94);
for(Num=0;Num<8;Num++)
{
  write_LCD_data(hang3[num][Num]);
}

write_LCD_command(0x88);//写第三行
 for(Num=0;Num<8;Num++)
{
  write_LCD_data(hang4[num][Num]);
}

write_LCD_command(0x8C);
 for(Num=0;Num<8;Num++)
{
  write_LCD_data(hang5[num][Num]);
}

write_LCD_command(0x98);//写第四行
for(Num=0;Num<8;Num++)
{
  write_LCD_data(hang6[num][Num]);
}

write_LCD_command(0x9C);
for(Num=0;Num<8;Num++)
{
  write_LCD_data(hang7[num][Num]);
}

}