PIC18系列编辑问题type qualifier mismatch in assignment

只看该作者 · 2011-9-17 14:57

本帖最后由 aresmcu 于 2011-9-17 15:01 编辑

lcd_puts("A/D:");

void lcd_puts(const char * s)
{
LCD_RS = 1; // write characters
while(*s)
lcd_write(*s++);
}

D:\code\18F\LED\LED.C:16:Warning [2066] type qualifier mismatch in assignment

我在16F874A里编辑通过的到18里面这么就不行了？
请高手指点谢谢（下面是我的源程序）

只看该作者 · 2011-9-17 15:00

#include <p18f4520.h>
#include "lcd.h"

#define LCD_RS  PORTAbits.RA3
#define LCD_RW  PORTAbits.RA2
#define LCD_EN  PORTAbits.RA1

#define LCD_DATA PORTD

#define LCD_STROBE() ((LCD_EN = 1),(LCD_EN=0))

void __delay_us(unsigned int time)
  {
while(--time)
{;}
}
void __delay_ms(unsigned int time1)
{
unsigned int i=0,j=2000;
i=j*time1;
  while(--i)
{;}
}
void  delay(void)
{
unsigned  int n,m;
for(n=0;n<=6000;n++)
{m++;}
  if(m==6000)
{m=0;}
}

/* write a byte to the LCD in 4 bit mode */

void
lcd_write(unsigned char c)
{
__delay_us(40);
LCD_DATA = ( ( c >> 4 ) & 0x0F );
LCD_STROBE();
LCD_DATA = ( c & 0x0F );
LCD_STROBE();
}

/*
* Clear and home the LCD
*/

void
lcd_clear(void)
{
LCD_RS = 0;
lcd_write(0x1);
__delay_ms(2);
}

/* write a string of chars to the LCD */

void lcd_puts(const char * s)
{
LCD_RS = 1; // write characters
while(*s)
lcd_write(*s++);
}

/* write one character to the LCD */

void
lcd_putch(char c)
{
LCD_RS = 1; // write characters
lcd_write( c );
}

/*
* Go to the specified position
*/

void lcd_goto(unsigned char y,unsigned char x)
{
LCD_RS = 0;

y&=0x01;
x&=0x0f;//限制x不能大于15，y不能大于1
if(y)x|=0x40;//第二行地址为0x40+0x80；
x|=0x80;
lcd_write(x);
}

/* initialise the LCD - put into 4 bit mode */
void
lcd_init()
{
char init_value;

ADCON1 = 0x06; // Disable analog pins on PORTA

init_value = 0x3;
TRISA=0x10;
TRISD=0;
LCD_RS = 0;
LCD_EN = 0;
LCD_RW = 0;

__delay_ms(15); // wait 15mSec after power applied,
LCD_DATA    = init_value;
LCD_STROBE();
__delay_ms(5);
LCD_STROBE();
__delay_us(200);
LCD_STROBE();
__delay_us(200);
LCD_DATA = 2; // Four bit mode
LCD_STROBE();

lcd_write(0x28); // Set interface length
lcd_write(0xF); // Display On, Cursor On, Cursor Blink
lcd_clear(); // Clear screen
lcd_write(0x6); // Set entry Mode
}

只看该作者 · 2011-9-17 15:00

#include<p18f452.h>
#include"lcd.h"

#define LED0  PORTBbits.RB0
#define LED1  PORTBbits.RB1
#define LED2  PORTBbits.RB2
#define LED3  PORTBbits.RB3

void main()
{

lcd_init();
lcd_goto(1,0); // select first lzine
lcd_puts("A/D:");
lcd_goto(0,1); // Select second line
lcd_puts("Thunder  Tiger");
lcd_goto(0,15); // Select second line
lcd_puts(" ");
TRISB=0;
PORTB=0;
while(1)
{
LED0=~LED0;
delay();
delay();
delay();
delay();
LED1=~LED1;
delay();
delay();
delay();
delay();
LED2=~LED2;
delay();
delay();
delay();
delay();
LED3=~LED3;
delay();
delay();
delay();
delay();

}

}