MicroBlaze 驱动器12864 v0.0

#include "xparameters.h"

#include "stdio.h"

#include "xutil.h"

#include "xbasic_types.h"

#include "xstatus.h"

#include "xgpio.h"

 

#define CHANNEL 1

#define SET_RS   XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1)

#define CLEAR_RS XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x1)

#define SET_RW   XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x2)

#define CLEAR_RW XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x2)

#define SET_EN   XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x8)

#define CLEAR_EN XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x8)

#define SET_PORT_IN  XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0xffffffff)

#define SET_PORT_OUT XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x00000000)

 

unsigned char dis[]={"123456"};

XGpio Lcd_Data,Lcd_Ctr;

 

/*延时time us*/

void delay_us(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++);

 }

/*对液晶12864进行操作的一系列子函数 没什么可说的 按照时序图写就是了

 

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

 

/*                                                                 */

 

/*检查LCD忙状态                                                    */

 

/*lcd_busy为1时，忙，等待。lcd-busy为0时,闲，可写指令与数据。      */

 

 

 

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

 

/*                                                                 */

 

/*写指令数据到LCD                                                  */

 

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

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

 

Xint8 lcd_busy()

 

 {                         

  Xuint8 result;

 

 

    SET_PORT_IN;

     CLEAR_EN;

    CLEAR_RS;

     SET_RW;

     

     delay_us(2);

     SET_EN;

    delay_us(2);

     

     result=XGpio_DiscreteRead (&Lcd_Data,CHANNEL);

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

    CLEAR_EN;

     result=result&0x80;

     SET_PORT_OUT;

 

    return result;

 

 }

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

 

 

void lcd_wcmd(Xuint8 cmd)

 

{                         

 

   while(lcd_busy());

   //  delay(50);

   CLEAR_EN;

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

    //asm("nop");

  CLEAR_RW;//  XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x2);

   // asm("nop");

    //XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x8);

 

    delay_us(2);

    SET_EN;

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

    XGpio_DiscreteWrite(&Lcd_Data,CHANNEL,cmd);

    delay_us(2);

    CLEAR_EN;//XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x8);

 

    //delay(2);

 

    //XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x8); 

   xil_printf("cmd done: %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)

 

{                         

 

  while(lcd_busy());

  //  delay(50);

   CLEAR_EN;

    SET_RS;

    CLEAR_RW;

    delay_us(2);

    SET_EN;

   

   

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

     //asm("nop");

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

     // asm("nop");

    //XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x8);

   //  delay(2);

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

    XGpio_DiscreteWrite(&Lcd_Data,CHANNEL,dat);

 

   

 

   // XGpio_DiscreteSet(&Lcd_Ctr,CHANNEL,0x8);

 

    delay_us(2);

 

    //XGpio_DiscreteClear(&Lcd_Ctr,CHANNEL,0x8);

     CLEAR_EN;

    xil_printf("data done: %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符

 

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

 

*/

 

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

 

{

 

Xuint8 lcd_temp;

 

lcd_pos(x,y);

 

lcd_temp=*str;

 

while(lcd_temp != 0x00)

 

{

 

lcd_wdat(lcd_temp);

 

lcd_temp=*(++str);

 

}

 

}

 

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

 

/*                                                                 */

 

/*  LCD初始化设定                                                  */

 

/*                                                                 */

 

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

 

void lcd_init()

 

{    delay_ms(40);

    lcd_wcmd(0x30);      //扩充指令操作

 

    delay_ms(5);

 

    lcd_wcmd(0x30);      //基本指令操作

 

    delay_ms(5);

 

    lcd_wcmd(0x0f);      //显示开，关?

    delay_ms(5);

 

    lcd_wcmd(0x01);      //清除LCD的允灸谌?

    delay_ms(10);

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

 

}

 

 void MicroBlaze_Initialize(){

 XGpio_Initialize(&Lcd_Data,XPAR_LCD_DATA_DEVICE_ID);

 

 XGpio_SetDataDirection(&Lcd_Data,CHANNEL,0x0);

 XGpio_Initialize(&Lcd_Ctr,XPAR_LCD_CTR_DEVICE_ID);

 XGpio_SetDataDirection(&Lcd_Ctr,CHANNEL,0x0);

  }

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

int main(void){

  unsigned char i=0;

  xil_printf("now begin\r\n");

  MicroBlaze_Initialize();

 lcd_init();

  lcd_pos(1,1);

  while(dis[i]!='0')

  {

   lcd_wdat(dis[i]);

    ++i;

  }

 xil_printf("print done\r\n");

 

  while(1);  

 

 return 0;

 

 

 }

 

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