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1.0 Circuit Diagram
2.0 Program
Or just post the driver, the complete routine can be downloaded above.
#include <intrins.h>
#include<ziku.c>
#define uchar unsigned char
#define uint unsigned int
uchar num[] = "0123456789";
sbit REST = P2^0; //Reset signal, active"L"
sbit C_D = P2^1; //L:data H:code
sbit C_E = P2^2; //Chip enable signal, active"L"
sbit R_D = P2^3; //read signal, active"L"
sbit W_R = P2^4; //write signal, active"L"
#define width 15 //display area width
#define Graphic 1
#define TXT 0
#define LcmLengthDots 128
#define LcmWidthDots 64
/****************************Correlation function of 12864 liquid crystal****************** ****/
void delay_nms(uint i)
{
while(i)
i--;
}
void write_commond(uchar com) //Write a command to the LCD
{
C_E = 0;
C_D = 1;
R_D = 1;
P0 = with;
W_R = 0; // write
_nop_();
W_R = 1; // disable write
C_E = 1;
C_D = 0;
}
void write_date(uchar dat) //Write a data to the LCD
{
C_E = 0;
C_D = 0;
R_D = 1;
P0 = that;
W_R = 0;
_nop_();
W_R = 1;
C_E = 1;
C_D = 1;
}
void write_dc(uchar com, uchar dat) //Write an instruction and a data
{
write_date(dat);
write_commond(com);
}
//Write one instruction and two data
void write_ddc (uchar com, uchar dat1, uchar dat2)
{
write_date(dat1);
write_date(dat2);
write_commond(com);
}
//LCD initialization function
void F12864_init(void)
{
REST = 0;
delay_nms(2000);
REST = 1;
write_ddc(0x40,0x00,0x00); //Set the first address of the text display area
write_ddc(0x41,128/8,0x00); //Set the width of the text display area
write_ddc(0x42,0x00,0x08); //Set the first address of the graphics display area to 0x0800
write_ddc(0x43,128/8,0x00); //Set the width of the graphic display area
write_commond(0xA0); //Set the cursor shape to 8x8 square
write_commond(0x80); //Display mode setting text and graphics (XOR)
write_commond(0x92); //Set the cursor
write_commond(0x9F); //Display switch setting text on, graphics on, cursor blinking off
}
//****************************//Clear display memory function
void F12864_clear(void)
{
unsigned int i;
write_ddc(0x24,0x00,0x00); //Set the address pointer to start from zero
write_commond(0xb0); //Auto write
for(i = 0;i < 128 * 64 ;i++)write_date(0x00); //清一屏
write_commond(0xb2); //Automatic write end
write_ddc(0x24,0x00,0x00); //Reset the address pointer
}
//Set the displayed address
void goto_xy (uchar x, uchar y, uchar mode)
{
uint temp;
temp = 128 / 8 * y + x;
if(mode) //mode = 1为Graphic
{ //If the graphics mode needs to add the first address of the graphics area to 0x0800
temp = temp + 0x0100;
}
write_ddc(0x24,temp & 0xff,temp / 256); //address pointer location
}
//Display an ASCII code function
void Putchar (flying x, flying y, flying Charbyte)
{
goto_xy(x,y,TXT);
write_dc(0xC4,Charbyte-32); //Data one read and write method //Check character rom
}
void display_string (uchar x, uchar y, uchar * p)
{
while(*p != 0)
{
if(x > 15 ) //Auto wrap 128*64
{
x = 0;
y++;
}
Putchar(x,y,*p);
++x;
++p;
}
}
void display_num (flying x, flying y, flying z)
{
flying z1, z2;
z1 = num[z / 10];
z2 = num[z % 10];
Putchar(x,y,z1);
Putchar(x+1,y,z2);
}
//Display a string of Chinese characters, j = k + n is (n is the number of words to be displayed), k is the word to choose from
void dprintf_hanzi_string_1(struct typFNT_GB16 code *GB_16,uint X_pos,uint Y_pos,uchar j,uchar k)
{
unsigned int address;
unsigned char m,n;
while(k < j)
{
m = 0;
address = LcmLengthDots / 8 * Y_pos + X_pos + 0x0800;
for(n = 0;n < 16;n++) //count value 16
{
write_ddc(0x24,(uchar)(address),(uchar)(address>>8)); //Set the display memory address
write_dc(0xc0,GB_16[k].Mask[m++]); //Write the left part of the Chinese character model
write_dc(0xc0,GB_16[k].Mask[m++]); //Write the right part of the Chinese character model
address = address + 128/8; //Modify the display memory address and display the next column (16 columns in total)
}
X_pos += 2;
k++;
}
}