disp.c

usbhost 开发码

//disp.c
//#include <reg52.h>
#include "common.h"
#include "disp.h"

sbit RS = P3^3;
sbit DISPE = P3^4;

void initcom()
{
	TMOD = 0x20;
	TH1 =0xfd;
	TL1 = 0xfd;
	TCON = 0x40;
	SCON = 0x50;
	PCON  = 0;
	TR1= 1;
//	IE = 0x90;
	loadmsg("ok!\r\b",5);
}
void loadmsg(uchar *msg,uchar len)
{
	uchar i;
	for(i = 0;i<len;i++)
	{
			if(*msg=='\0')
				break;
			SBUF = *msg;
			while(TI==0);TI=0;
			msg++;
	}
}

/*输入并显示字符dispd*/
void writedispdata(uchar dispd) 
{
		RS = 1;
		DISPE = 1;
		LCDADD = dispd;
		delay(1);
		DISPE = 0;
		delay(200);
}
//
/*输入初始化命令字dispc*/
void writedispcmd(uchar dispc)  
{
		RS = 0;
		DISPE = 1;
		LCDADD = dispc;
		delay(1);
		DISPE = 0;
		delay(200);
}
//
/*初始化lcd*/
void initlcd(void)      
{
	writedispcmd(0x01);
	writedispcmd(0x38);
	writedispcmd(0x06);
	writedispcmd(0x0e);
	writedispcmd(0x01);
}
void dispinfo(uchar line,uchar * ch)
{
	if(line == 1)
	{
		writedispcmd(0x80);
		while(*ch != '\0')
		{
			writedispdata(*ch);
			ch++;
		}
	}
	else if(line == 2){
		writedispcmd(0xc0);
		while(*ch != '\0')
		{
			writedispdata(*ch);
			ch++;
		}
	}
	else{
		while(*ch != '\0')
		{
			writedispdata(*ch);
			ch++;
		}
	}
}
void disphex(uchar hex)
{
	uchar i;
	i = hex>>4;
	i &=  0x0f;
	if(i<10)
		writedispdata(0x30|i);
	else
		writedispdata(0x37+i);
	i = hex&0x0f;
	if(i<10)
		writedispdata(0x30|i);
	else
		writedispdata(0x37+i);
} 
htoc(uchar h,uchar * chh,uchar *chl)
{
	if((h>>4)<=0x09)
		*chh = 0x30|(h>>4);
	else
		*chh = 0x37+(h>>4);
	h &= 0x0f;
	if(h<=0x09)
		 *chl= 0x30|h;
	else
		*chl = 0x37+h;
}