lcd_61.c

LCD1602的显示模块程序

//LCD1602 Driver  Create by  nie xiong 2006.11.18
#include "spce061a.h"
#define CS1  0x0004 // IOA2  Set 1
#define CS0  0xfffb   //Set 0
#define RW1  0x0002 // IOA1
#define RW0  0xfffd   //Set 0
#define DC1  0x0001 // IOA0 
#define DC0  0xfffe    //Set 0
#define VSS0  0xffbf   //DB6 VSS(GND)
#define VCC1  0x0080   //DB7 VCC(5V)

#define LCDDIR   *P_IOB_Dir  // IOB0~IOB7 Data
#define LCDBUS   *P_IOB_Data  // IOB0~IOB7 Data
#define LCDCTRL  *P_IOA_Buffer  // IOA0~IOA7 Ctrl
unsigned int sys10mscounter;
//unsigned int syslimitcounter;
int path1[8]={0x00,0x1f,0x00,0x1f,0x00,0x1f,0x00,0x1f};/*自定义符号：横1*/
int path2[8]={0x1f,0x00,0x1f,0x00,0x1f,0x00,0x1f,0x00};/*自定义符号：横2*/
int pats1[8]={0x15,0x15,0x15,0x15,0x15,0x15,0x15,0x15};/*自定义符号：竖1*/
int pats2[8]={0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a};/*自定义符号：竖2*/
void soft_nop(){}
void soft_10ms()/***********12MHZ 提供10MS 软件延时************/
{ 	int i;
	for(i=0;i<711;i++) *P_Watchdog_Clear = 0x01;
}
void soft_20ms()/***********12MHZ 提供20MS 软件延时************/
{ 	soft_10ms();
	soft_10ms();
}
void hard_10ms(unsigned int delaytime) /*基于10MS 的硬件延时*/
{ 	sys10mscounter=delaytime;
	while(sys10mscounter--) soft_10ms();
	*P_Watchdog_Clear = 0x01;
}
unsigned int lcdcounter;
unsigned int  lcdusing1,lcdusing2;
unsigned int  lcd_checkbusy()/*检查LCD 忙*/
{ 	int lcdstate;
	LCDCTRL &= DC0;  //DC=1为数据,=0为命令.
	LCDCTRL |= RW1;  //RW=1为读,=0为写.
	LCDCTRL |= CS1;  //CS=1选通.
	LCDDIR = 0x0000;
	soft_nop();	
	lcdstate=LCDBUS & 0x00ff;	
	LCDDIR = 0xffff;
	LCDCTRL &= CS0;
	return((unsigned int )(lcdstate&0x80));
}
void lcd_wrcmd(unsigned int lcdcmd) /*写LCD 命令*/
{ 	lcdusing1=1;
	while(lcd_checkbusy())*P_Watchdog_Clear = 0x01;
	LCDBUS &=0xff00;
	LCDBUS |= lcdcmd;
	LCDCTRL &= DC0;
	LCDCTRL &= RW0;
	LCDCTRL |= CS1;
	soft_nop();		
	LCDCTRL &= CS0; 	
	LCDBUS |=0x00ff;
	lcdusing1=0;
}
void lcd_moveto(int position) /*移动光标到指定位.0-79*/
{ 	int cmd=0x80;
	lcdcounter=position;
	if (position > 47)
		position += 0x18;
	else
	{ 	if (position > 31)position -= 0x14;  ///
		else
		{ if (position > 15) position += 0x2c;  ////
		}
	}
	cmd=cmd|position;
	lcd_wrcmd(cmd);
	*P_Watchdog_Clear = 0x01;
}
void lcd_wrdata(int lcddata) /*在当前显示位置显示数据*/
{ 	lcdusing2=1;
	while(lcd_checkbusy()) *P_Watchdog_Clear = 0x01;
	if(lcdcounter==16){
		lcd_moveto(16);
		while(lcd_checkbusy()) *P_Watchdog_Clear = 0x01;
	}
	if(lcdcounter==32){
	lcd_moveto(32);
	while(lcd_checkbusy()) *P_Watchdog_Clear = 0x01;
	}
	if(lcdcounter==60){
		lcd_moveto(60);
		while(lcd_checkbusy())*P_Watchdog_Clear = 0x01;
	}
	if(lcdcounter==80){
		lcd_moveto(0);
		while(lcd_checkbusy())*P_Watchdog_Clear = 0x01;
		lcdcounter=0;
	} /*为通用而如此*/
	lcdcounter++;
	LCDBUS &=0xff00;
	LCDBUS |= lcddata;
	LCDCTRL |= DC1; //DC=1为数据,=0为命令.
	LCDCTRL &= RW0; //RW=1为读,=0为写.
	LCDCTRL |= CS1; //CS=1选通.
	soft_nop();		
	LCDCTRL &= CS0; 	
	LCDBUS |=0x00ff;
	lcdusing2=0;
}

void lcd_wrdata1(int index,int lcddata) /*在index显示位置显示字符lcddata*/
{ 	unsigned int position,cmd =0x80;
	lcdusing2=1;
	while(lcd_checkbusy()) *P_Watchdog_Clear = 0x01;
	//lcd_moveto(index);
	cmd =0x80;
	position = index;
	cmd=cmd|position;
	lcd_wrcmd(cmd);	
	soft_20ms();
	while(lcd_checkbusy()) *P_Watchdog_Clear = 0x01;
	//lcdcounter++;
	LCDBUS &=0xff00;
	LCDBUS |= lcddata;
	LCDCTRL |= DC1; //DC=1为数据,=0为命令.
	LCDCTRL &= RW0; //RW=1为读,=0为写.
	LCDCTRL |= CS1; //CS=1选通.
	soft_nop();		
	LCDCTRL &= CS0; 	
	LCDBUS |=0x00ff;
	lcdusing2=0;
}


void lcd_string(unsigned int *strpoint) /*在当前显示位置显示LCD 字符串*/
{ 	int i=0;
	while(strpoint[i]!=0){
		lcd_wrdata(strpoint[i]);
		i++;
		*P_Watchdog_Clear = 0x01;
	}
}
void lcd_init()/*初始化*/
{ 	lcd_wrcmd(0x38); /*设置8 位格式,2 行,5*7*/
	lcd_wrcmd(0x0c); /*整体显示,关光标,不闪烁*/
	lcd_wrcmd(0x06); /*设定输入方式,增量不移位*/
	lcd_wrcmd(0x01); /*清除显示*/
	lcdcounter=0;
}
void lcd_cls()/*清除显示*/
{ 	lcd_wrcmd(0x01);
	lcdcounter=0;
}

void PortInit(void)
{
	*P_IOA_Dir = 0xffbf;
	*P_IOA_Attrib = 0xffff;
	*P_IOA_Data = 0xffff;
	*P_IOA_Buffer = 0xffbf;

	*P_IOB_Dir = 0xffff;
	*P_IOB_Attrib = 0xffff;
	*P_IOB_Data = 0xffff;
	//LCDCTRL &=VSS0;
}

void lcd_test(unsigned int data1)
{   unsigned int j;
	lcd_init(); 
	for(j=0;j<32;j++){lcd_wrdata(data1+j);}
	hard_10ms(100);
}

main()
{
	unsigned int j;
	//IE=0;P0=0xff;P1=0xff;P2=0xff;P3=0xff; /*初始化T*/
	PortInit();
	lcd_init();soft_20ms();
	lcd_test(0x30);
	while(1)
	{
		lcd_init();
	    //lcd_string("1234567890123456 890123456789abc");
		  lcd_string("Niexoing,Who areyou. 2006.11.18.");
		hard_10ms(500);
		lcd_test(0x40);
		hard_10ms(500);
		*P_Watchdog_Clear = 0x01;
	}
}