#include "xparameters.h"

#include "stdio.h"

#include "xutil.h"

#include "xbasic_types.h"

#include "xstatus.h"

#include "xgpio.h"

 

#define CHANNEL 1

 

 

XGpio Lcd_Data,Lcd_Ctr;

Xuint8 table[]="timthorpe";

unsigned char number[]="0123456789";

/*******************************************************************/

/*延时time us*/

void delay(Xuint16 time)

{

  Xuint16 i,j;

  for(i=0;i<time;i++)

   for(j=0;j<26;j++);

}

void delay_ms(Xuint16 time)

{

  Xuint16 i,j;

  for(i=0;i<time;i++)

   for(j=0;j<3785;j++);

}

/*短延时time */

void delay_s(time)

{ Xuint8 i;

 for(i=0;i<time;i++);

}

/*******************************************************************/

/*液?2864进行操作的一系列子函数 没什么可说的 按照时序图写褪橇?

/*******************************************************************/

 

 

 

Xint8 lcd_busy()

 

 {                         

      Xuint16 nTimeOut=0;

 

  XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1);

 

    XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x2);

 

    XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x4);

 

    delay(3);

   

     XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0xffffffff);

 

     while((XGpio_DiscreteRead(&Lcd_Data,CHANNEL)&0x80));

   

     XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4);

      delay(1);

     

    // xil_printf("the value of result is %x\r\n",result);

     

 

 }

/*******************************************************************/

 

/*                                                                 */

 

/*写指令数据到LCD                                                  */

 

/*RS=L，RW=L，E=高脉冲，D0-D7=指令码。                             */

/*******************************************************************/

void lcd_wcmd(Xuint8 cmd)

 

{                         

 

     lcd_busy();

   // delay_ms(20);

  

   

   //delay(1);

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1);

    //delay(1);

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x2);

     //delay(1);

   

     XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4);

    //delay(1);

   // XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x0);

    XGpio_DiscreteWrite(&Lcd_Data,CHANNEL,cmd);

 

    delay_ms(5);

    XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x4);

  

  

 

    delay_ms(5);

 

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4); 

     delay(1);

     XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x2);

    // delay(1);

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1); 

     //delay(1);

     

    xil_printf("command %x\r\n",cmd);

     

}

 

/*******************************************************************/

 

/*                                                                 */

 

/*写显示数据到LCD                                                  */

 

/*RS=H，RW=L，E=高脉冲，D0-D7=数据。                               */

 

/*                                                                 */

 

/*******************************************************************/

 

void lcd_wdat(Xuint8 dat)

 

{                         

 

   lcd_busy();

  /* delay_ms(20);

   

   

    //delay(1);

    XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x1);

  

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x2);

 

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4);

    //delay(100);

     //delay(1);

      XGpio_DiscreteWrite(&Lcd_Data,CHANNEL,dat);

  

      delay(5);

      XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x4);

      delay(5);

    //  XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x0);

    

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4);

    // delay(1);

    //XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x2);

    // delay(1);

    //XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1); 

    // delay(1);

 

   xil_printf("data %x\r\n",dat);

    delay_ms(1);*/

   

     //  delay_ms(20);

  

   

   //delay(1);

    XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x1);

    //delay(1);

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x2);

     //delay(1);

   

     XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4);

    //delay(1);

   // XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x0);

    XGpio_DiscreteWrite(&Lcd_Data,CHANNEL,dat);

 

    delay_ms(5);

    XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x4);

  

  

 

    delay_ms(5);

 

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x4); 

     delay(1);

     XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x2);

    // delay(1);

    XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1); 

     //delay(1);

     

    xil_printf("data %x\r\n",dat);

 }

 

/******************************************************************

设置在液晶中显疚?

********************************************************************/

void lcd_pos(Xuint8 x,Xuint8 y)

 

{                         

 

   Xuint8  pos;

 

   if (x==0)

 

     {x=0x80;}

 

   else if (x==1)

 

     {x=0x90;}

 

   else if (x==2)

 

     {x=0x88;}

 

   else if (x==3)

 

     {x=0x98;}

 

   pos = x+y; 

 

   lcd_wcmd(pos);     //显示地址

 

  

}

 

/*******************************************************************

 

在液晶中输出一串字?

********************************************************************

 

*/

 

void print_string(Xuint8 x,Xuint8 y,Xuint8 * str)

 

{

 

Xuint8 lcd_temp;

 

lcd_pos(x,y);

 

lcd_temp=*str;

 

while(lcd_temp != '\0')

 

{

 

lcd_wdat(lcd_temp);

 

lcd_temp=*(++str);

 

 

}

 

}

 

/*******************************************************************/

 

/*                                                                 */

 

/*  LCD初始化设定                                                  */

 

/*                                                                 */

 

/*******************************************************************/

 

void lcd_init()

 

{    delay_ms(50);

    lcd_wcmd(0x30);      //基本指令

 

    delay(1500);

 

    lcd_wcmd(0x30);      //基本指令操作

 

    delay(400);

     

      lcd_wcmd(0x0F);      //显示开，关?

    delay(1500);

 

    lcd_wcmd(0x01);      //清除LCD的允灸谌?

    delay_ms(15);

   

   

     

   

   

   

   

     xil_printf("lcd initialization done!\n\r");

 

}

 

 

//********************************************上述为对液晶的操作

int main(void){

   Xuint8 result;

 

  xil_printf("now begin\r\n");

 XGpio_Initialize(&Lcd_Data,XPAR_LCD_DATA_DEVICE_ID);

 XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x0);

 //XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x0);

 XGpio_Initialize(&Lcd_Ctr,XPAR_LCD_CTR_DEVICE_ID);

 XGpio_SetDataDirection(&Lcd_Ctr,CHANNEL,0x0);

 

 lcd_init();

 

  lcd_pos(1,3);

  lcd_wdat(0x35);

  /*delay_ms(10000);

  lcd_wcmd(0x87);

  lcd_wdat(0x2F);

 

  delay_ms(10000);

  print_string(2,0,number);

  delay_ms(10000);

  lcd_wcmd(0x01);*/

   while(1);

 

 return 0;

 

 

 }