LCD12864 串行方式画sin直线显示图像Word格式文档下载.docx
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//端口定义
sbitLCD_CS=P3^5;
//片选信号
sbitLCD_SID=P3^6;
//串行数据线
sbitLCD_SCLK=P3^4;
//串上时钟输入
//数组，字定义
ucharcodea[]={"
阿姆YOUNG"
};
//定义要显示的字符串
uintx=0;
//图片取模
/**************************************/
codeuchartu[]={
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x07,0xFE,0x12,0x40,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0x80,0x00,0x00,
0x06,0x18,0x1F,0xC0,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0x00,0x00,0x00,
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0x00,0x30,0x33,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0xFF,0xFF,0xFC,0x00,0x00,0x00,
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0x01,0x80,0x33,0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0xFF,0xFE,0x00,0x00,0x00,0x00,
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0x00,0x00,0x03,0x00,0x00,0x03,0x97,0xBF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x1F,0xFF,0xFF,0xFF,0xFF,0x9F,0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x7F,0xFF,0xFD,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
//延时函数
voidDelay_nms（ucharn）
{
uchari;
ucharj;
for（i=0;
i<
n;
i++）
for（j=0;
j<
125;
j++）//大概1ms
_nop_（）;
}
//串行发送一个字节
voidLCD_sendbyte（ucharbyte）
8;
{
LCD_SCLK=0;
//拉低时钟线
LCD_SID=（bit）（byte&
0x80）;
//发送最高位数据
LCD_SCLK=1;
//上升沿发送数据
byte=byte<
<
1;
//左移一位
}
/****************************************/
//写指令
voidLCD_write_com（ucharcom）
LCD_CS=1;
LCD_sendbyte（0xf8）;
//送入5个连续的“1“，启动一个周期,11111,RW（0）,RS（0）,0
LCD_sendbyte（0xf0&
com）;
//取高四位，数据分两次传送，
//每个字节的内容被送入两个字节
//高四位放在第一个字节的高四位
（com<
4））;
//低四位放在第二个字节的高四位
LCD_CS=0;
Delay_nms（10）;
//串行不支持读操作，不可检测忙操作，这里用延时替代
/******************************************/
//写数据
voidLCD_write_dat（uchardat）
LCD_sendbyte（0xfa）;
//送入5个连续的“1“，启动一个周期,11111,RW（0）,RS
（1）,0
dat）;
（dat<
//低四位放在第二个字节
/********************************************/
//LCD初始化
voidLCD_init（void）
{
LCD_write_com（0x30）;
//选择基本指令集
LCD_write_com（0x0c）;
//开显示，无游标，不反白
LCD_write_com（0x01）;
//清除显示屏幕，把DDRAM位址计数器调整为00H
Delay_nms（5）;
//清屏操作时间较长1.6ms因此加此延时
LCD_write_com（0x02）;
//清DDRAM位址归位,此处貌似与清屏重复
LCD_write_com（0x06）;
//设定光标右移，整体显示不移动
/*************************************************/
//显示字符串
voidprint（uchar*s）
while（*s!
='
\0'
）
{
LCD_write_dat（*s）;
s++;
/***************************************************/
//设置显示地址
voidLCD_Setaddress（ucharx,uchary）
{//地址从第1行第1列开始不从0开始
ucharaddr;
switch（x）
case1:
addr=0x80+y-1;
break;
case2:
addr=0x90+y-1;
case3:
addr=0x88+y-1;
case4:
addr=0x98+y-1;
default:
break;
LCD_write_com（addr）;
//字符显示开始地址
/*****************************************************/
//让字符串显示在固定位置，设置（x，y）的位置，调用上面的函数
voidLCD_Putstring（ucharx,uchary,uchar*pData）
LCD_Setaddress（x,y）;
while（*pData!
='
）
LCD_write_dat（*pData++）;
/*----------------------------------------------------------------------------------------------------------------------*/
//打点绘图，适用于在屏幕上打稀疏的几个点，不能用于横行连续打点
voidLCD_draw_point（ucharx,uchary）
ucharx_byte,x_bit;
//在横坐标的哪一个字节，哪一个位
uchary_byte,y_bit;
//在纵坐标的哪一个字节，哪一个位
x_byte=x/16;
//算出它在哪一个字节（地址）
//注意一个地址是16位的
x_bit=x%16;
//（取模）算出它在哪一个位
y_byte=y/32;
//y是没在哪个字节这个说法
//这里只是确定它在上半屏（32行为一屏）还是下半屏
//0:
上半屏1:
下半屏
y_bit=y%32;
//y_bit确定它是在第几行
LCD_write_com（0x34）;
//打开扩展指令集
LCD_write_com（0x80+y_bit）;
//垂直地址（上）貌似与说明书正好相反
LCD_write_com（0x80+x_byte+8*y_byte）;
//先写水平坐标（下）貌似与说明书正好相反
//具体参照数据手册
//下半屏的水平坐标起始地址为0x88
//（+8*y_byte）就是用来确定在上半屏还是下半屏
if（x_bit<
8）//如果x_bit位数小于8
LCD_write_dat（0x01<
（7-x_bit））;
//写高字节。
因为坐标是从左向右的
//而GDRAM高位在左，低位在右
LCD_write_dat（0x00）;
//低字节全部填0
else
//高字节全部填0
（15-x_bit））;
}
LCD_write_com（0x36）;
//打开绘图显示
//回到基本指令集
/************************************/
//打点绘图一次打水平一行可以避免断点现象
//x表示数组的首
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