lcd.c

iccavr的一个实例

#include<io8515.h> 
//*********************************************
//**the data port,use the port a,if donot change it
#define Db     PORTA
#define DbIn   PINA
#define DbDir  DDRA
//** DB0--PA0  DB1--PA1  DB2--PA2  DB3--PA3  DB4--PA4
//** DB5--PA5  DB6--PA6  DB7--PA7
//*****************************************************  
//**the contral port,use the port c,if not change it
#define ContrPort PORTC
#define ContrIn PINC
#define ContrDir DDRC
//**D_I--PC0
#define D_I   0b00000001
//**R_W--PC1
#define R_W   0b00000010
//**E--PC4
#define E     0b00010000
//**CS1--PC7
#define CS1   0b10000000
//**CS2--PC6
#define CS2   0b01000000
//**RESET--PC5
#define RESET 0b00100000
#define All   0b11110011
//*******************************************************
/* 1 vss   2 vdd   3 vo   4 d\i   5 r\w   6 e   7 db0
   8 db1   9 db2   10 db3   11 db4   12 db5   13 db6   14 db7
   15 cs1   16 cs2   17 reset   18 vee   19 a   20 k     */
//*********************************************************    
#include"C:\icc\project\LCD\code.c" 
void WriInsn(unsigned char command)
	 { unsigned char state;
	   ContrDir=ContrDir|All;//set the direction out
	   ContrPort=ContrPort&~D_I;//D_I=0
	   ContrPort=ContrPort|R_W;//R_w=1
	   DbDir=0b00000000;//data input module
	   do
	   {ContrPort=ContrPort|E;//E=1,read the status;
	    state=DbIn;//status trans to state
	    ContrPort=ContrPort&~E;}//E=0,  
	   while(state&0b10000000);//if "busy"
	   ContrPort=ContrPort&~R_W;//R_w=0
	   DbDir=0b11111111;//data output module 
	   Db=command;
	   ContrPort=ContrPort|E;//E=1
	   ContrPort=ContrPort&~E;//E=0,
	   
	 }
//*********************************************************
void WriData(unsigned char WriData)
	 { unsigned char state;
	   ContrDir=ContrDir|All;//set the direction out
	   ContrPort=ContrPort&~D_I;//D_I=0
	   ContrPort=ContrPort|R_W;//R_w=1
	   DbDir=0b00000000;//data input module
	   do
	   {ContrPort=ContrPort|E;//E=1,read the status;
	    state=DbIn;//status trans to state
	    ContrPort=ContrPort&~E;}//E=0,  
	   while(state&0b10000000);//if "busy"
	   ContrPort=ContrPort|D_I;//D_I=1 
	   ContrPort=ContrPort&~R_W;//R_w=0
	   DbDir=0b11111111;
	   Db=WriData;
	   ContrPort=ContrPort|E;//E=1
	   ContrPort=ContrPort&~E;//E=0,
	 }	 
/************************************************************
unsigned char Readdata(void)
		 { unsigned char state,ReadData;
	       ContrDir=ContrDir|All;//set the direction out
	       ContrPort=ContrPort&~D_I;//D_I=0
	       ContrPort=ContrPort|R_W;//R_w=1
	       DbDir=0b00000000;//data input module
	       do
	         {ContrPort=ContrPort|E;//E=1,read the status;
	          state=DbIn;//status trans to state
	          ContrPort=ContrPort&~E;}//E=0,  
	       while(state&0b10000000);//if "busy"
		   ContrPort=ContrPort|D_I;//D_I=1
		   ContrPort=ContrPort|E;//E=1
		   ReadData=PINA;
		   ContrPort=ContrPort&~E;//E=0,
		   DbDir=0b11111111;
		   return(ReadData);		   
		 }	 */
//************************************************************
//**clear CGRAM**********
void ClearRam(void)
       { 
	     unsigned char Clear_page,Clear_Y;		
//***************************************************		 		 
	     ContrPort=ContrPort|CS1;  //cs1=1
		 ContrPort=ContrPort&~CS2;//cs2=0		
		 Clear_page=8;
		 while(Clear_page)
		       {
			     Clear_Y=64;
				 while(Clear_Y)
				 	  {
					   
					   WriInsn((Clear_page-1)+0b10111000);
					   WriInsn((Clear_Y-1)+0b01000000);
					   WriData(0x00);
					   Clear_Y--;
					  }
				 Clear_page--;	  			   
			   }
//***************************************************		 		 
	     ContrPort=ContrPort&~CS1;  //cs1=0
		 ContrPort=ContrPort|CS2;//cs2=1		 
		 Clear_page=8;
		 while(Clear_page)
		       {
			     Clear_Y=64;
				 while(Clear_Y)
				 	  {
					   
					   WriInsn((Clear_page-1)+0b10111000);
					   WriInsn((Clear_Y-1)+0b01000000);
					   WriData(0x00);
					   Clear_Y--;
					  }
				 Clear_page--;	  			   
			   }		 
	   
	   
	   }       		 
//********************************************************
//**setup CGRAM**********************		 
void WriteCgram(unsigned char DataSequent, unsigned char Point)
	 {  
	   unsigned char NumPage;  //the data page 
	   unsigned NumCs1,NumCs2;//chip select
	   unsigned NumTemp01,i,j;
	   if(DataSequent<8)
            {
			  NumPage=0;
			   if(DataSequent<4)
			     {NumCs1=1;
				  NumCs2=0;
				  NumTemp01=16*DataSequent;
				  }	
			   else 
			     {NumCs1=0;
				  NumCs2=1;
				  NumTemp01=16*(DataSequent-4);
				  }				 
				   	  			 
			   }
	   else if((DataSequent)<16&&(DataSequent>7))
	        {
			 NumPage=2;
			 if(DataSequent<12)
			     {NumCs1=1;
				  NumCs2=0;
				  NumTemp01=16*(DataSequent-8);
				  }	
			   else
			     {NumCs1=0;
				  NumCs2=1;
				  NumTemp01=16*(DataSequent-12);
				  }		
			 }
	   else if((DataSequent>15)&&(DataSequent<24))
	        {
			 NumPage=4;
			 if(DataSequent<20)
			     {NumCs1=1;
				  NumCs2=0;
				  NumTemp01=16*(DataSequent-16);
				  }	
			   else 
			     {NumCs1=0;
				  NumCs2=1;
				  NumTemp01=16*(DataSequent-20);
				  }					
			 }
	   else if((DataSequent>23)&&(DataSequent<32))
	        {
			 NumPage=6;
			 if(DataSequent<28)
			     {NumCs1=1;
				  NumCs2=0;
				  NumTemp01=16*(DataSequent-24);
				  }	
			   else
			     {NumCs1=0;
				  NumCs2=1;
				  NumTemp01=16*(DataSequent-28);
				  }		
			 }	
		if(NumCs1)	 
		    {ContrPort=ContrPort|CS1;}
		else
		     {ContrPort=ContrPort&~CS1;}
		if(NumCs2)
		    {ContrPort=ContrPort|CS2;}	
		else	 	
		    {ContrPort=ContrPort&~CS2;}
		NumPage=NumPage&0b00000111;
		NumPage=NumPage|0b10111000;
		NumTemp01=NumTemp01&0b00111111;
		NumTemp01=NumTemp01|0b01000000;
		WriInsn(NumPage);//set the page	
		WriInsn(NumTemp01);// y address
		
		i=16;j=0;
		while(i)
		   {
		     WriData(TAB[Point][j]);
			 i--;
			 j++;
			 }
		WriInsn(NumPage+1);//set the page
		WriInsn(NumTemp01);// y address
		i=16;
		while(i)
		   {
		     WriData(TAB[Point][j]);
			 i--;
			 j++;
			 }
	   
	   } 		 
//**************************************************
//开始显示		 
void StartDiaplay(void)
        {
//***********use the left hand number******
        PORTC=PORTC|~0b01111111;  //cs1=1
		PORTC=PORTC&~0b01000000;  //cs2=0	
//****************************************	
		WriInsn(0b11000000);//the first line
		PORTC=PORTC&0b01111111;  //cs1=0
		PORTC=PORTC|0b01000000;  //cs2=1	
		WriInsn(0b11000000);//the first line
		PORTC=PORTC|~0b01111111;  //cs1=1
		PORTC=PORTC&~0b01000000;  //cs2=0	
		WriInsn(0b00111111);//start
		WriInsn(0b00111111);	
		PORTC=PORTC&0b01111111;  //cs1=0
		PORTC=PORTC|0b01000000;  //cs2=1	 
		WriInsn(0b00111111);//start				
		}