t6963c_drv.c

T6963液晶显示屏驱动函数,在应用时只需调用就行。

/*************************************************************************
*  File name:  T6963C_DRV.c    
*  Author:       
*  Version: 1.0      
*  Date: 
*  Description:      
*************************************************************************/
#include "iom64v.h"
#include "macros.h"
#include "external.h"

#include "T6963C_drv.h"
#include "main.h"

// 初始化LCM
void LCM_init(void)
{
  CBI_LCM_RES();							// 给LCM复位信号
  delayms(2);
  SBI_LCM_RES();

  LCM_BL_OFF();  

  LCM_write_cmd3(0x00, 0x00, LCM_GRH_HOME);	// 设置图形显示区域首地址GraphAddr
  LCM_write_cmd3(0x1e, 0x00, LCM_GRH_WIDTH); // 设置图形显示区宽度LineChar 240bit/8

  LCM_write_cmd1(LCM_CURSOR_SHAPE);			// 设置光标形状为下横线
  LCM_write_cmd1(LCM_MODE_OR);				// 显示方式设置为逻辑或合成
  LCM_write_cmd1(0x98);						// 显示开关设置:图形方式

  LCM_clear();
  
  LCM_BL_ON();
}

//清除屏幕（清所有8K存储空间） 
void LCM_clear(void) 
{  
  unsigned i, j;
     
  LCM_write_cmd3(0x00, 0x00, LCM_ADDR_POINTER);  //设置显示存储器首地址 
  LCM_write_cmd1(LCM_AUTO_WR);	
  
  CBI_LCM_CE();
  for (i=0; i<128; i++) {
  	   for (j=0; j<30; j++) {
	   	    auto_write_dat(0x00);
  	   }
  }
  SBI_LCM_CE();   
      
  LCM_write_cmd1(LCM_AUTO_OVER);
} 

/*
void cursor_on(unsigned char row, unsigned char col)
{  
  LCM_write_cmd3(col, row, 0x21);			// 设置光标位置
  LCM_write_cmd1(0xa0);		 				// 设置光标形状
  LCM_write_cmd1(0x96);						// 开光标
}  

void cursor_off(void)
{
  LCM_write_cmd1(0x94);
}
*/
				
// 指令写入函数 
void write_cmd(unsigned char cmd) 
{ 
  LCM_state01();

  LCM_CMD_enable();
   
  LCM_DAT_DDR = 0xff;     				  // A口方向为输出 
  LCM_WR_DAT_PORT = cmd;
  NOP();
  NOP();
  
  CBI_LCM_WR();
  NOP();
  NOP();
  SBI_LCM_WR();
} 
  
//数据写入函数 
void write_dat(unsigned char dat) 
{ 
  LCM_state01();

  LCM_DAT_enable();				  	// 选数据通道

  LCM_DAT_DDR = 0xff;     				// A口方向为输出 
  LCM_WR_DAT_PORT = dat;
  NOP();
  NOP();
  
  CBI_LCM_WR();
  NOP();
  NOP();
  SBI_LCM_WR();
} 

// 数据自动写入函数 
void auto_write_dat(unsigned char dat) 
{ 
  LCM_state3();

  LCM_DAT_enable();				  // 选数据通道
  
  LCM_DAT_DDR = 0xff;  				  // A口方向为输出 
  LCM_WR_DAT_PORT = dat;
  NOP();
  NOP();
  
  CBI_LCM_WR();
  NOP();
  NOP();
  SBI_LCM_WR();
} 

/*
// 数据自动读出函数 
unsigned char auto_read_dat(void)
{
  unsigned char dat = 0x00;
  
  LCM_state2();

  LCM_DAT_enable();				  // 选数据通道
  
  LCM_DAT_DDR = 0x00;  				  // A口方向为输入
  LCM_WR_DAT_PORT = 0xff;
  CBI_LCM_RD();
  NOP();
  NOP();
  dat = LCM_RD_DAT_PORT;
  SBI_LCM_RD();
  
  return (dat);
} */

// 向LCM写入cmd
void LCM_write_cmd1(unsigned char cmd)
{
   CBI_LCM_CE();   

   write_cmd(cmd);

   SBI_LCM_CE();      
}

// 向LCM写入cmd, dat1
void LCM_write_cmd2(unsigned char dat1, unsigned char cmd)
{
   CBI_LCM_CE();   

   write_dat(dat1);
   write_cmd(cmd);
   
   SBI_LCM_CE();      
}

// 向LCM写入cmd, dat1, dat2
void LCM_write_cmd3(unsigned char dat1, unsigned char dat2, unsigned char cmd)
{
   CBI_LCM_CE();   

   write_dat(dat1);
   write_dat(dat2);
   write_cmd(cmd);
   
   SBI_LCM_CE();      
}
				
// 读取LCM状态	
unsigned char LCM_read_state(void)
{
  unsigned char state;
  
  LCM_WR_DAT_PORT = 0xff;
  LCM_DAT_DDR = 0x00; 		  		  // PORTA为input with pull-up

  LCM_CMD_enable();				  // 选指令通道
  CBI_LCM_RD();
  NOP();
  NOP();
  state = LCM_RD_DAT_PORT;
  NOP();
  NOP();
  SBI_LCM_RD();
  
  return (state);
}

// S0:指令读写状态，0:忙 S1:数据读写状态，0:忙
void LCM_state01(void)
{
   while ( (LCM_read_state() & 0x03) != 0x03 );
}

// S2:数据自动读状态
void LCM_state2(void)
{
   while ( (LCM_read_state() & 0x04) != 0x04 );
}

// S3:数据自动写状态
void LCM_state3(void)
{
   while ( (LCM_read_state() & 0x08) != 0x08 );
}