//-----------------------------------------------------------------
// 名稱: LCD1602液晶控制與顯示程序
//-----------------------------------------------------------------
#include <pic.h>
#include "LM044L.h"
//-----------------------------------------------------------------
// LCD忙等待
//-----------------------------------------------------------------
void LCD_BUSY_WAIT()
{
    INT8U status;
    TRIS_LCD_DAT  = 0xFF;                         //將端口設(shè)為輸入
    RS = 0; RW = 1;                               //讀狀態(tài)寄存器
    do
    {  E = 1; NOP(); status = PORT_LCD_DAT; E = 0;//讀狀態(tài)       
    }   
    while (status & 0x80);                        //忙則繼續(xù)等待
}

//-----------------------------------------------------------------
// 寫LCD命令
//-----------------------------------------------------------------
void Write_LCD_Command(INT8U cmd)
{                               
     TRIS_LCD_DAT = 0x00;                        //LCD數(shù)據(jù)端口設(shè)為輸出
     PORT_LCD_DAT = cmd;                         //發(fā)送命令
     PORT_LCD_CTL = TRIS_LCD_CTL = 0x00;         //控制端口設(shè)為輸出,初值為0x00
     RS = 0; RW = 0; E  = 1; NOP(); E = 0;       //寫命令
     LCD_BUSY_WAIT();                            //LCD忙等待
}

//-----------------------------------------------------------------
// 寫LCD數(shù)據(jù)寄存器
//-----------------------------------------------------------------
void Write_LCD_Data(INT8U dat)
{     
    TRIS_LCD_DAT = 0x00;                        //LCD數(shù)據(jù)端口方向設(shè)為輸出
    PORT_LCD_DAT = dat;                         //發(fā)送數(shù)據(jù)
    RS = 1; RW = 0; E  = 1; NOP(); E = 0;       //寫數(shù)據(jù)
    LCD_BUSY_WAIT();                            //LCD忙等待
}

//-----------------------------------------------------------------
// LCD初始化
//-----------------------------------------------------------------
void LCD_Initialize()
{
    Write_LCD_Command(0x38); __delay_ms(2);      //置功能,8位,雙行,5*7
    Write_LCD_Command(0x01); __delay_ms(2);      //清屏
    Write_LCD_Command(0x06); __delay_ms(2);      //字符進(jìn)入模式:屏幕不動(dòng),字符后移
    Write_LCD_Command(0x0C); __delay_ms(2);      //顯示開,關(guān)光標(biāo)
}

//-----------------------------------------------------------------
// 清屏
//-----------------------------------------------------------------
void Clear_Screen()
{


}

//-----------------------------------------------------------------
// 設(shè)置顯示位置
//-----------------------------------------------------------------
void Set_LCD_POS(INT8U r, INT8U c)
{


}

//-----------------------------------------------------------------
// 顯示字符串
//-----------------------------------------------------------------
void LCD_ShowString(INT8U r, INT8U c,char *str)
{


}