//Demo LCD12864 spi
//www.dfrobot.com
#include "LCD12864RSPI.h"
extern "C"
{
#include "Arduino.h"
#include <wiring.h>
#include <inttypes.h>
#include <stdio.h> //not needed yet
#include <string.h> //needed for strlen()
#include <avr/pgmspace.h>
}
LCD12864RSPI::LCD12864RSPI()
{
this->DEFAULTTIME = 80; // 80 ms default time
this->delaytime = DEFAULTTIME;
}
//*********************延时函数************************//
void LCD12864RSPI::delayns(void)
{
delayMicroseconds(delaytime);
}
void LCD12864RSPI::WriteByte(int dat)
{
digitalWrite(latchPin, HIGH);
delayns();
shiftOut(dataPin, clockPin, MSBFIRST, dat);
digitalWrite(latchPin, LOW);
}
void LCD12864RSPI::WriteCommand(int CMD)
{
int H_data,L_data;
H_data = CMD;
H_data &= 0xf0; //屏蔽低4位的数据
L_data = CMD; //xxxx0000格式
L_data &= 0x0f; //屏蔽高4位的数据
L_data <<= 4; //xxxx0000格式
WriteByte(0xf8); //RS=0，写入的是指令；
WriteByte(H_data);
WriteByte(L_data);
}
void LCD12864RSPI::WriteData(int CMD)
{
int H_data,L_data;
H_data = CMD;
H_data &= 0xf0; //屏蔽低4位的数据
L_data = CMD; //xxxx0000格式
L_data &= 0x0f; //屏蔽高4位的数据
L_data <<= 4; //xxxx0000格式
WriteByte(0xfa); //RS=1，写入的是数据
WriteByte(H_data);
WriteByte(L_data);
}
void LCD12864RSPI::Initialise()
{
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
digitalWrite(latchPin, LOW);
delayns();
WriteCommand(0x30); //功能设定控制字
WriteCommand(0x0c); //显示开关控制字
WriteCommand(0x01); //清除屏幕控制字
WriteCommand(0x06); //进入设定点控制字
}
void LCD12864RSPI::CLEAR(void)
{
WriteCommand(0x30);//
WriteCommand(0x01);//清除显示
}
void LCD12864RSPI::DisplayString(int X,int Y,uchar *ptr,int dat)
{
int i;
switch(X)
{
case 0: Y|=0x80;break;
case 1: Y|=0x90;break;
case 2: Y|=0x88;break;
case 3: Y|=0x98;break;
default: break;
}
WriteCommand(Y); // 定位显示起始地址
for(i=0;i<dat;i++)
{
WriteData(ptr[i]);//显示汉字时注意码值，连续两个码表示一个汉字
}
}
void LCD12864RSPI::DisplaySig(int M,int N,int sig)
{
switch(M)
{
case 0: N|=0x80;break;
case 1: N|=0x90;break;
case 2: N|=0x88;break;
case 3: N|=0x98;break;
default: break;
}
WriteCommand(N); // 定位显示起始地址
WriteData(sig); //输出单个字符
}
void LCD12864RSPI::DrawFullScreen(uchar *p)
{
int ygroup,x,y,i;
int temp;
int tmp;
for(ygroup=0;ygroup<64;ygroup++) //写入液晶上半图象部分
{ //写入坐标
if(ygroup<32)
{
x=0x80;
y=ygroup+0x80;
}
else
{
x=0x88;
y=ygroup-32+0x80;
}
WriteCommand(0x34); //写入扩充指令命令
WriteCommand(y); //写入y轴坐标
WriteCommand(x); //写入x轴坐标
WriteCommand(0x30); //写入基本指令命令
tmp=ygroup*16;
for(i=0;i<16;i++)
{
temp=p[tmp++];
WriteData(temp);
}
}
WriteCommand(0x34); //写入扩充指令命令
WriteCommand(0x36); //显示图象
}
LCD12864RSPI LCDA = LCD12864RSPI();
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