#include "lm3sxxxx.h"
#define LCD_1602_DATA   GPIO_PORTB_BASE
#define LCD_1602_PORT   GPIO_PORTF_BASE
#define LCD_1602_EN     GPIO_PIN_0
#define LCD_1602_RW     GPIO_PIN_1
#define LCD_1602_RS     GPIO_PIN_2

void delay(unsigned long ulVal)
{
    ulVal=SysCtlClockGet()/4000;
    while(--ulVal!=0);
}
unsigned char LCD_check_busy(void)
{
    unsigned char result;
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_RS,0x00);//RS=0
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_RW,0x02);//RW=1
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_EN,0x04);//EN=1
    GPIOPinTypeGPIOInput(LCD_1602_DATA,0XFF);//设置数据口为输入模式
    result=(GPIOPinRead(LCD_1602_DATA,0x08)&0x08);
    GPIOPinTypeGPIOOutput(LCD_1602_DATA,0XFF);//从新设置数据口为输出模式 
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_EN,0x00);//EN=0
    return result;   
}

void lcd_write(unsigned char cd,unsigned char temp)
{
    while(LCD_check_busy());
    if(cd)          //当写数据使RS=1，当写指令使RS=0；
        GPIOPinWrite(LCD_1602_PORT,LCD_1602_RS,0x01);//RS=1
    else
        GPIOPinWrite(LCD_1602_PORT,LCD_1602_RS,0x00);//RS=0
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_RW,0x00);//RW=0
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_EN,0x00);//EN=0
    delay(1);
    GPIOPinWrite(LCD_1602_DATA,0XFF,temp);      //写数据到LCD
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_EN,0x04);//EN=1
    delay(2);
    GPIOPinWrite(LCD_1602_PORT,LCD_1602_EN,0x00);//EN=0    
}
//定位置
void lcd_pos(unsigned char x,unsigned char y)
{
    if(x<16)
    {
        if(y==0)
            x=0x80+x;
        else
            x=0xc0+x;
        lcd_write(0,x);
    }
}
//LCD初始化
void lcd_init(void)
{
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);//使能数据口
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);//使能控制口 
    GPIOPinTypeGPIOOutput(LCD_1602_PORT,LCD_1602_RS|LCD_1602_RW|LCD_1602_EN);//设置控制口为输出模式
    GPIOPinTypeGPIOOutput(LCD_1602_DATA,0XFF);//设置数据口为输出模式 

    lcd_write(0,0x38);
    delay(1); 
    lcd_write(0,0x38);
    delay(1);
    lcd_write(0,0x38);
    delay(1); 
    lcd_write(0,0x0C);
    delay(1); 
    lcd_write(0,0x06); 
    delay(1); 
//    lcd_write(0,0x18);
//    delay(1); 
    lcd_write(0,0x01);
//    delay(1); 
  
}
//写字符串到LCD
void lcd_strwdat(unsigned char x,unsigned char y,unsigned char *str)
{
    lcd_pos(x,y);
    while(*str!='\0')
    {
        lcd_write(1,*str);
        str++;
    }
}

int main()
{
    //clockInit();//初始化晶振
    lcd_init();
    lcd_pos(0,0);
    lcd_strwdat(0,0,"hello");
    lcd_strwdat(0,1,"world");
    while(1);
}