我是初學者,正在學液晶,找了一塊12864C,內控IC未知,找了些相關資料,寫了個小程序,只要求能顯示,我就是嘗試將數寫入液晶內,并顯示.但液晶幾乎沒反應,不知為何?
#include
#include
#include
#include
#define   unchar   unsigned char
#define   unint    unsigned int
/*************LCD指令****************/
#define  GLCD_ON       63      //打開LCD
#define  GLCD_OFF      62      //關閉LCD
#define  GLCD_LINE     192     //左半邊起始行
#define  SET_PAGE      184     //設置頁數
#define  SET_Y         64      //設置Y軸位置
#define  CLEAR         0       //清除LCD
/*************LCD控制****************/
sbit          EN   = P2^7;
sbit          RW   = P2^6;
sbit          RS   = P2^5;
sbit          CS2  = P2^4;
sbit          CS1  = P2^3;
unchar        Gx,Gy;
/***************查忙*****************/
check_GLCD()
{
  unsigned char x,bei_cs1,bei_cs2;
  bei_cs1=CS1;
  CS1=0;
  bei_cs2=CS2;
  CS2=0;
  EN = 0;    
  RW = 1;    
  RS = 0;
  P1 = 0xff;
  EN = 1;
  do
   {
    x=P1&0x80;
   }
  while(x);
  EN = 1;      
  RW = 1;
  RS = 1;
  CS1=bei_cs1;
  CS2=bei_cs2;
}
/*********************寫入控制指令0/0****************/
void write_GLCD(unsigned command)
{
  unsigned char bei_cs1,bei_cs2;
  bei_cs1=CS1;      
  bei_cs2=CS2;
  EN = 0;
  CS1=0;
  CS2=0;
  RW = 0;
  RS = 0;
  EN = 1;
  P1 = command;
  EN = 0;
  RW = 1;
  RS = 1;
//檢查忙碌標志
  check_GLCD();
  CS1=bei_cs1;
  CS2=bei_cs2;
}
/************初始復位*******************/
clear_GLCD()
{
  unsigned int i,j;
  for(i=0;i<2;i++);
  CS1=1;
  CS2=1;
  write_GLCD(GLCD_ON);    
  write_GLCD(GLCD_LINE);  
  for(i=0;i<8;i++)
   {
    write_GLCD(SET_PAGE+i);
    write_GLCD(SET_Y);
    for(j=0;j<64;j++)
      write_GLCD(0);
   }
}
/*********************寫入顯示數據1/0****************/
void write_GLCD_data(unsigned GLCDdata)
{
  unsigned char bei_cs1,bei_cs2;

  bei_cs1=CS1;
  bei_cs2=CS2;
  EN=0;
  CS1=0;
  CS2=0;
  RW=0;         // P2_6 = 0        
  RS=1;         // P2_5 = 1
  EN=1;         // P2_7=1
  P0=GLCDdata;  // 從 P0 送出 數據
  EN=0;         // P2_7= 0
  RS=0;         // P2_5 = 0
  RW=1;         // P2_6 = 1
// 檢查忙碌標記,直到繪圖型LCD不忙碌時就返回
  check_GLCD();
  CS1=bei_cs1;
  CS2=bei_cs2;
}
/*********************讀顯示數據****************/
read_GLCD()
{
  unsigned char bei_cs1,bei_cs2,command;
  bei_cs1=CS1;      
  bei_cs2=CS2;
  EN = 0;
  CS1=0;
  CS2=0;
  P1=0xff;
  RW = 1;
  RS = 1;
  EN = 1;
  command = P1;
  EN = 0;
  RW = 1;
  RS = 1;
//檢查忙碌標志
  check_GLCD();
  CS1=bei_cs1;
  CS2=bei_cs2;
  return  command;
}
gotoxy(unsigned x,unsigned y)
{
  Gy=y;
  Gx=x;
}
/*****************主程序區****************************/
main()
{
  unsigned int       j,n;
  unsigned char      c2,c3;
  while(1)
   {
    clear_GLCD();
    gotoxy(0,0);
    write_GLCD(1);     //設置x  3F/63     GLCD_ON
    write_GLCD(GLCD_LINE);   //  C0/192
    for(c2=0;c2<4;c2++)
     {
      write_GLCD(SET_PAGE+c2);       //184
      write_GLCD(SET_Y);              //64
      for(j=0;j<64;j++)
       {
        write_GLCD(64+j);
        write_GLCD_data(j);
        c3=read_GLCD();
       }
      c3=read_GLCD();
     }
    EN=1;
    write_GLCD(1);     //設置x  3F/63
    CS1=0;
    CS2=0;
    EN=0;
    for(n=0;n<50000;++n);
  }  
}
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