標題: 發(fā)個12864LCD程序?qū)W習一下 [打印本頁]
作者: 唐永紅 時間: 2010-9-10 12:16
標題: 發(fā)個12864LCD程序?qū)W習一下
//實驗?zāi)康模菏煜?2864LCD的使用
//12864LCD帶中文字庫
//編程讓12864LCD顯示公司LOGO和公司名字
//硬件設(shè)置：
//關(guān)斷所有撥碼開關(guān)。
#include <p30f6014.h> //dsPIC30F6014標準頭文件
_FOSC(CSW_FSCM_OFF & XT_PLL4); //4倍頻晶振，F(xiàn)ailsafe 時鐘關(guān)閉
_FWDT(WDT_OFF); //關(guān)閉看門狗定時器
_FBORPOR(PBOR_OFF & MCLR_EN); //掉電復(fù)位禁止，MCLR復(fù)位使能。
_FGS(CODE_PROT_OFF); //代碼保護禁止
#define di LATBbits.LATB4 //命令/數(shù)據(jù)選擇
#define rw LATBbits.LATB5 //讀/寫選擇
#define e LATBbits.LATB6 //使能
#define psb LATBbits.LATB2 //8位/4位并口選擇
#define rst LATBbits.LATB7 //復(fù)位
unsigned int __attribute__((address(0x900))) temp;
unsigned int __attribute__((address(0x902))) temp1;
const unsigned char TAB1[ ]={ //定義顯示圖片的數(shù)據(jù)表
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};
unsigned int lcd_x; //X地址
unsigned int lcd_y; //Y地址
// bit busy; //忙標志位
void init(); //系統(tǒng)初始函數(shù)
void lcd_init(); //LCD初始函數(shù)
void clear_p(); //清屏函數(shù)
void han_wr2a(); //寫函數(shù)
void wr_zb(); //寫準備函數(shù)
void qushu(); //查表函數(shù)
void send_d(unsigned char x); //寫一字節(jié)數(shù)據(jù)函數(shù)
void send_i(unsigned char x); //寫一字節(jié)命令函數(shù)
void chk_busy(); //查LCD忙函數(shù)
void delay();
//-------------------------------------------
int main(void)
{
init(); //系統(tǒng)初始化
lcd_init(); //LCD初始化
clear_p(); //清除顯示
qushu(); //寫數(shù)據(jù)到LCD顯示
while(1);
}
//-------------------------------------------
void init()
{
TRISB=0X0000; //設(shè)置B口為輸出
TRISD=0X0000; //設(shè)置D口為輸出
}
//-------------------------------------------
void lcd_init()
{
rst=0; //復(fù)位LCD
delay();
rst=1; //LCD正常工作
delay();
psb=1; //8位并行通信
send_i(0x30); //基本操作指令
send_i(0x01); //關(guān)顯示
send_i(0x06); //指定在寫入或讀取時，光標的移動方向
send_i(0x0c); //開顯示，關(guān)光標，不閃爍
}
//-------------------------------------------
void wr_zb()
{
send_i(0x34); //擴展操作指令
send_i(lcd_y); //設(shè)置Y地址
send_i(lcd_x); //設(shè)置X地址
send_i(0x30); //基本操作指令
}
//-------------------------------------------
void clear_p()
{
send_i(0x1); //清除顯示
send_i(0x34); //擴展操作指令
send_i(0x30); //基本操作指令
}
//------------------------------------------
void qushu()
{
unsigned char i,j,k; //定義臨時變量
temp=0; //查表偏移地址
lcd_x=0x0080; //上半屏X地址80H
for(i=0;i<2;i++) //共兩屏
{
lcd_y=0x0080; //每一行的Y地址80H（即頂格顯示）
for(j=0;j<32;j++) //每半屏共20H行
{
wr_zb(); //寫準備（設(shè)置X地址和Y地址）
for(k=0;k<16;k++) //每一行16字節(jié)（因為頂格寫）
{
temp1=TAB1[temp]; //查表獲取顯示數(shù)字
send_d(temp1); //送LCD顯示
temp++; //查表偏移地址+1
}
lcd_y++; //送下一行數(shù)據(jù)
send_i(0x0036); //擴展指令操作：圖形顯示開
send_i(0x0030); //基本指令操作
}
lcd_x=0X0088; //下半屏X地址
}
}
//-------------------------------------------
void send_d(unsigned char x)
{
chk_busy(); //判斷LCD是否忙
di=1; //總線上是數(shù)據(jù)
delay();
rw=0; //寫操作
delay();
PORTD=x; //數(shù)據(jù)送總線
e=1; //使能
delay();
e=0;
delay();
}
//--------------------------------------------
void send_i(unsigned char x)
{
chk_busy(); //判斷忙信號
di=0; //總線上是命令
delay();
rw=0; //寫操作
delay();
PORTD=x; //數(shù)據(jù)送總線
e=1; //使能
delay();
e=0;
delay();
}
//-------------------------------------------
void chk_busy()
{
// busy=1; //先置忙信號
TRISD=0Xffff; //更改總線方向為輸入
di=0; //總線上為命令
delay();
rw=1; //讀操作
delay();
while(PORTDbits.RD7)
{
delay();
delay();
e=1;
delay();
delay();
e=0;
}
e=0;
TRISD=0X0000; //總線還原為輸出
}
//-------------------------------------------
void delay()
{
int m;
for(m=0;m<10;m++)
{;}
}
作者: gzpenglin 時間: 2014-6-10 17:24
多謝分享！辛苦了！
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