ATmega128并行控制带字库的12864程序

软件：GCC V4.20
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实验内容：写Lcd12864_ST7920。
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硬件连接：
LCD12864_ST7920                  ATmega128
1.GND               --------        GND
2.VCC               --------        VCC
3.V0                --------        NC
4.RS(CS)            --------        PD7
5.R/W(SID)          --------        PG0
6.E(SCLK)           --------        PG1
7.D0                --------        PC0
8.D1                --------        PC1
9.D2                --------        PC2
10.D3               --------        PC3
11.D4               --------        PC4
12.D5               --------        PC5
13.D6               --------        PC6
14.D7               --------        PC7
15.PSB              --------        VCC
16.NC               --------        NC
17.RST              --------        VCC
18.NC               --------        NC
19.LED+             --------        VCC
20.LED-             --------        GND
以下是程序源代码：
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#include 
#include
#include  
#define  E_set        PORTG|=_BV(PG1)    //液晶使能
#define  E_clear      PORTG&=~_BV(PG1)
#define  RW_set       PORTG|=_BV(PG0)    //液晶读写
#define  RW_clear     PORTG&=~_BV(PG0)
#define  RS_set       PORTD|=_BV(PD7)    //液晶数据
#define  RS_clear     PORTD&=~_BV(PD7)   //液晶指令
unsigned char j=0;
unsigned char yb=0x80;
unsigned char name00[] PROGMEM={"飞射白鹿雪连天，"};
unsigned char name01[] PROGMEM={"笑书神侠倚碧鸳。"};
unsigned char name02[] PROGMEM={"自古英雄多奇逸，"};
unsigned char name03[] PROGMEM={"金老挥毫尽使然。"};
unsigned char name10[] PROGMEM={"李白乘舟将欲行，"};
unsigned char name11[] PROGMEM={"忽闻岸上踏歌声。"};
unsigned char name12[] PROGMEM={"桃花潭水深千尺，"};
unsigned char name13[] PROGMEM={"不及汪伦送我情。"};
unsigned char name20[] PROGMEM={"this is a 12864 "};
unsigned char name21[] PROGMEM={"display program,"};
unsigned char name22[] PROGMEM={"welcome to commu"};
unsigned char name23[] PROGMEM={"nicate with me! "};

void wr_com(unsigned char);
void wr_data(unsigned char);
void reset (void);
void outChinese(unsigned char,unsigned char,unsigned char *point);
void ydgb(void);
void outchar(unsigned char,unsigned char,unsigned char *point);

void wr_com(unsigned char value)//写指令，写指令时必须为RS=0;RW=0;
{
 E_clear;
 RS_clear;
 RW_clear;
 _delay_ms(1);
 PORTC=value; //并入字符数据
 E_set;
 _delay_ms(2); //如果没有延时就必须要加查忙指令
 E_clear;
}
void wr_data(unsigned char sj)//写数据，写数据时必须为 RS=1;RW=0;
{
 E_clear;
 RS_set;
 RW_clear;
 _delay_ms(1);
 PORTC=sj;
 E_set;
 _delay_ms(1);//如果没有延时就必须要加查忙指令
 E_clear;
}
void reset (void)
{
 wr_com(0x01);//清屏
 wr_com(0x08);//关显示
 wr_com(0x03);//归位
 wr_com(0x30);//功能设置
 wr_com(0x0f);//开显示
 wr_com(0x01);//清屏
}
//****************
//outChinese 为函数名
//place 为显示地址的首地址
//unit  字符长度
//charcode[]  要显示数据的内容
void outChinese(unsigned char place,unsigned char unit,unsigned char *point)
{
 unsigned char i,progdata;
 wr_com(place);
 for(i=0;i