ATmega128的特点是io口很多，所以我们可以用并行的方式来驱动此液晶屏，增加总线的速度，此程序是是网上整理收集而来，但已经通过本人验证可以使用，故在此发表.大家在应用的时候只需更改相应的io就行了.
软件：GCC V4.20--------------------------------------------------------------- 实验内容：写Lcd12864_ST7920。---------------------------------------------------------------硬件连接：LCD12864_ST7920ATmega1281.GND -------- GND2.VCC -------- VCC3.V0 -------- NC4.RS(CS) -------- PD75.R/W(SID) -------- PG06.E(SCLK) -------- PG17.D0 -------- PC08.D1 -------- PC19.D2 -------- PC210.D3 -------- PC311.D4 -------- PC412.D5 -------- PC513.D6 -------- PC614.D7 -------- PC715.PSB -------- VCC16.NC -------- NC17.RST -------- VCC18.NC -------- NC19.LED+ -------- VCC20.LED- -------- GND以下是程序源代码：---------------------------------------------------------------*/ #include avr/io.h>#includeavr/pgmspace.h>#include util/delay.h> #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
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