#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

for(j=0;j<26;j++);

}

void delay_ms(Xuint16 time)

{

Xuint16 i,j;

for(i=0;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;

}

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