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ATmega128并行控制带字库的12864程序

作者:时间:2012-08-02来源:网络收藏
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_ST7920                  1.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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