PIC 驱动1602程序，显示一排方块，大家帮忙看看啥问题

只看该作者 · 2014-6-10 14:08

本帖最后由 haorenyigea 于 2014-6-10 14:56 编辑

#include "pic.h"

__CONFIG(FOSC_INTOSC&CLKOUTEN_OFF&MCLRE_ON&WDTE_OFF);//&PWRTE_ON&BOREN_ON

#define _XTAL_FREQ    4000000L          //内部4MHz

#define uint unsigned int
#define uchar unsigned char

#define RS RB0
#define RW RB1
#define EN RB2
#define BLK_CON RB4

uchar table[]="LCD1602 check ok";
uchar table1[]="study up";
//*******************************************************************//
//                         系统初始化
//*******************************************************************//

void System_Init(void)
{
      OSCCON = 0b01101000;          //内部4MHz
      OSCTUNE= 0b00000000;          //出厂校准

      TRISA  = 0b00000000;          //RA0-RA3输出、RA5输入
      ANSELA = 0b00000000;          //RA5 模拟输入

      TRISB  = 0b00000000;          //RB0-RB3触摸按键
      ANSELB = 0b00000000;          //4个触摸按键
      WPUB = 0b00000000;          //无上拉

      IOCBP  = 0b00000000;          //关电平变化中断
      IOCBN  = 0b00000000;

      TRISD  = 0b00000000;          //PORTD输出
      ANSELD = 0b00000000;          //数字  I/O

      TRISC  = 0b10011000;          //串口 I2C

      TRISE  = 0b00000000;          //PORTE输出
      ANSELE = 0b00000000;          //数字  I/O
      WPUE = 0b00000000;          //无上拉

}


//*******************************************************************//
//                            主程序部分
//*******************************************************************//

void delay(uint n)
{  uint  i;
uchar j;
   for(i=0;i<n;i++)
            {asm("CLRWDT");
   for(j=0;j<100;j++);
            }
}
void lcd_wcom(uchar com)
{
      RS=0;
      RW=0;
      PORTD=com;
      delay(5);
      EN=1;
      EN=0;
}
void lcd_wdat(uchar dat)
{
      RS=1;
      RW=0;
      PORTD=dat;
      delay(5);
      EN=1;
      EN=0;
}

bit lcd_check_busy()
{
      static bit busy_flag;
      RS=0;
      RW=1;
      EN=1;
      asm("nop");
      asm("nop");
      asm("nop");
      if(PORTD&0X80)
      busy_flag=1;
      else
      busy_flag=0;
      EN=0;
      return busy_flag;
}

void lcd_init()
{

      lcd_wcom(0x38);
      delay(5);//稳定
//       lcd_wcom(0x01);//清屏
      lcd_wcom(0x0c); //开显示，不显示光标
      lcd_wcom(0x06); //写数据后地址自动后移
      lcd_wcom(0x01); //显示指针起始位置
}

void LCD_Write_Char(uchar x,uchar y,uchar s)
{
      if(x==1)
            lcd_wcom(0x80+y);
      else
            lcd_wcom(0xc0+y);
      lcd_wdat(s);
}
void LCD_Write_String(uchar x,uchar y,uchar *s)
{
      if(x==1)
            lcd_wcom(0x80+y);
      else
            lcd_wcom(0xc0+y);
      while(*s)
      {
            lcd_wdat(*s);
            s++;
      }
}
void main (void)
{
System_Init();

lcd_init();
uchar n,m=0;
lcd_wcom(0x80);

for(m=0;m<16;m++)
{
      lcd_wdat(table[m]);
      delay(200);
}
lcd_wcom(0x80+0x44);
for(n=0;n<8;n++)
{
      lcd_wdat(table1[n]);
      delay(200);
}
while(1);