单片机的动手实践篇--51单片机玩转12864
12864液晶的驱动和1602的类似,只不过是多了几个扩展的功能,不如画图功能:
这里讲一下:不要简单的认为12864是y轴64,x为128,那是点阵的分布,不是读写的分布,如正图表示,y轴的32行,从0到31,x轴的16 从0到15,0到7为上半个屏幕,8到15在下半个屏幕,所以绘图的时候,有两个部分要进行书写
在12864上载入任意一幅图:
示例代码:
#include<reg52.h> #define uint unsigned int #define uchar unsigned char sbit lcdrs = P2^4;//数据还是指令的选择端口 sbit lcdwr = P2^5;//读写操作端口 sbit lcden = P2^6;//使能端延时端口 sbit PSB = P2^1;//串行数据还是并行数据的选择段 //图片的编码,这幅图片的编码是一个哆啦a梦 unsigned char code pic1[] = { /* 0X10,0X01,0X00,0X80,0X00,0X40, */ 0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X00,0X00,0XFF,0XFC,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X00,0XFF,0XFF,0XFF,0XF8,0X00,0X00,0X00,0X00,0X00,0X00,0X00, 0X00,0X00,0X00,0X00,0X3F,0XC0,0X0F,0XC0,0X0F,0XE0,0X00,0X00,0X00,0X00,0X00,0X00, 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write_cmd(0x30);//基本指令操作 write_cmd(0x0c);//开显示,关掉光标 write_cmd(0x01);//清楚lcd的内容 } void lcd_putpic(unsigned char code *img)//载入图画的函数 { uint i,j; //显示上半个屏幕的内容 for(i = 0;i<32;i++) { write_cmd(0x80+i);//垂直的地址 write_cmd(0x80);//水平的地址 for(j=0;j<16;j++) { write_date(*img); img++; } } //显示下半个屏幕的内容 for(i = 0;i<32;i++) { write_cmd(0x80+i);//垂直的内容 write_cmd(0x88);//水平的地址第三行的内容 for(j=0;j<16;j++) { write_date(*img); img++; } } } void setpic()//图像显示模式设置函数 { write_cmd(0x36);//选择8bit的数据流,图像显示模式 delay1ms(5); } main() { init_12864();//初始化液晶 setpic();//初始化液晶图片显示 lcd_putpic(pic1);//载入一幅图片 delay1ms(5); while(1); }
以后载入图片只需要将图片用取模的软件,注意图片的大小必须是128x64的尺寸,否则会出现乱码,这是个比较容易犯的错误,希望大家注意