#include<reg52.h>
sbit RS = P2^0;
sbit RW = P2^1;
sbit EN = P2^2;
#define RS_CLR RS=0
#define RS_SET RS=1
#define RW_CLR RW=0
#define RW_SET RW=1
#define EN_CLR EN=0
#define EN_SET EN=1
void delay_us(unsigned int r) /{
if (r== 0)
{
return ;
}
while (--r);
}
void delay_ms(unsigned char f)
{
unsigned char k, u;
for (k = 1; k < f; k++)
{
for (u = 1;u; u++)
{ ; }
}
}
void LCD_write_com(unsigned char com)
{
RS_CLR;
RW_CLR;
EN_SET;
P0 = com;
delay_us(5);
EN_CLR;
}
void LCD_write_Data(unsigned char Data)
{
RS_SET;
RW_CLR;
EN_SET;
P0 = Data;
delay_us(5);
EN_CLR;
}
/******************************************************************/
/* ÇåÆáoˉêy */
/******************************************************************/
void LCD_clear(void)
{
LCD_write_com(0x01);
delay_ms(5);}
void LCD_write_str(unsigned char x1,unsigned char y1,unsigned char *s)
{
if (y1 == 0)
{
LCD_write_com(0x80 + x1);
}
else
{
LCD_write_com(0xC0 + x1);
}
while (*s)
{
LCD_write_Data( *s);
s ++;
}
}
void LCD_write_char(unsigned char x1,unsigned char y1,unsigned char Data)
{
if (y1 == 0)
{
LCD_write_com(0x80 + x1);
}
else
{
LCD_write_com(0xC0 + x1);
}
LCD_write_Data( Data);
}
void LCD_init(void)
{
LCD_write_com(0x38);
delay_ms(5);
LCD_write_com(0x38);
delay_ms(5);
LCD_write_com(0x38);
delay_ms(5);
LCD_write_com(0x38);
LCD_write_com(0x08);
LCD_write_com(0x01);
LCD_write_com(0x06);
delay_ms(5);
LCD_write_com(0x0C);
}
void main(void)
{
unsigned char i2;
unsigned char *p;
delay_ms(100);
LCD_init();
while (1)
{
i2 = 1;
p = "333333";
LCD_clear();
LCD_write_str(2,0,"Welcome to");
delay_ms(250);
while (*p)
{
LCD_write_char(i2,1,*p);
i2 ++;
p ++;
delay_ms(250);
}
delay_ms(250);
}
}
头文件
/*--------------------------------------------------------------------------
REG52.H
Header file for generic 80C52 and 80C32 microcontroller.
Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
All rights reserved.
--------------------------------------------------------------------------*/
#ifndef __REG52_H__
#define __REG52_H__
/* BYTE Registers */
sfr P0 = 0x80;
sfr P1 = 0x90;
sfr P2 = 0xA0;
sfr P3 = 0xB0;
sfr PSW = 0xD0;
sfr ACC = 0xE0;
sfr B = 0xF0;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0 = 0x8A;
sfr TL1 = 0x8B;
sfr TH0 = 0x8C;
sfr TH1 = 0x8D;
sfr IE = 0xA8;
sfr IP = 0xB8;
sfr SCON = 0x98;
sfr SBUF = 0x99;
/* 8052 Extensions */
sfr T2CON = 0xC8;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;
/* BIT Registers */
/* PSW */
sbit CY = PSW^7;
sbit AC = PSW^6;
sbit F0 = PSW^5;
sbit RS1 = PSW^4;
sbit RS0 = PSW^3;
sbit OV = PSW^2;
sbit P = PSW^0; //8052 only
/* TCON */
sbit TF1 = TCON^7;
sbit TR1 = TCON^6;
sbit TF0 = TCON^5;
sbit TR0 = TCON^4;
sbit IE1 = TCON^3;
sbit IT1 = TCON^2;
sbit IE0 = TCON^1;
sbit IT0 = TCON^0;
/* IE */
sbit EA = IE^7;
sbit ET2 = IE^5; //8052 only
sbit ES = IE^4;
sbit ET1 = IE^3;
sbit EX1 = IE^2;
sbit ET0 = IE^1;
sbit EX0 = IE^0;
/* IP */
sbit PT2 = IP^5;
sbit PS = IP^4;
sbit PT1 = IP^3;
sbit PX1 = IP^2;
sbit PT0 = IP^1;
sbit PX0 = IP^0;
/* P3 */
sbit RD = P3^7;
sbit WR = P3^6;
sbit T1 = P3^5;
sbit T0 = P3^4;
sbit INT1 = P3^3;
sbit INT0 = P3^2;
sbit TXD = P3^1;
sbit RXD = P3^0;
/* SCON */
sbit SM0 = SCON^7;
sbit SM1 = SCON^6;
sbit SM2 = SCON^5;
sbit REN = SCON^4;
sbit TB8 = SCON^3;
sbit RB8 = SCON^2;
sbit TI = SCON^1;
sbit RI = SCON^0;
/* P1 */
sbit T2EX = P1^1; // 8052 only
sbit T2 = P1^0; // 8052 only
/* T2CON */
sbit TF2 = T2CON^7;
sbit EXF2 = T2CON^6;
sbit RCLK = T2CON^5;
sbit TCLK = T2CON^4;
sbit EXEN2 = T2CON^3;
sbit TR2 = T2CON^2;
sbit C_T2 = T2CON^1;
sbit CP_RL2 = T2CON^0;
#endif
要生成hex时出现时，出现这个怎么解决啊
Rebuild target 'Target 1'
compiling 18b20.c...
compiling L1602.C...
linking...
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL: MAIN
MODULE: .\L1602.obj (L1602)
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?PR?MAIN?L1602
Program Size: data=28.0 xdata=0 code=851
Target not created.
Build Time Elapsed: 00:00:00
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