LCD 12232F serial port C51 program (ST7920)

Because the 12232F display is commonly used, but what we usually see are some parallel port assembly programs, and there is no parallel port program corresponding to 12232F, and the serial port C51 program is very rare. In order to facilitate everyone's use, this site has debugged it out. Please give your advice! 

/**********************************************************/  
/* */  
/* 12232F serial port driver C51, 11.0592M crystal */  

/*Things to note when using this LCD: */  
/*Be sure to connect a 20K potentiometer between the three pins VO, VDD and VSS. */  
/*The middle pin of the potentiometer is connected to VO, and the other two pins are connected to VDD and VSS. */  
/*Then adjust the size of the potentiometer until there is a display. If it is not connected, */  
/*the display may be dark, with nothing displayed, and there is no response to the command  
. I have tested this program. Welcome to give your comments. */  
/******************************************************/  
#include   
#include  



#define uint unsigned int  
#define uchar unsigned char 



/*12232f  PIN s define*/  
sbit CS=P1^5;  
sbit SID=P1^6;  
sbit SCLK=P1^7;  



void delay_1ms(uint x)  
{  
uint j;  
uchar i;  
(j=0;j{  
for(i=0;i<120;i++);  
}  
} 



void send_command(uchar command_data)  
{  
uchar i;  
uchar i_data,data1,data2;  
i_data=0xf8;  
delay_1ms(10);  
CS=1;  
SCLK=0;  
for(i=0;i<8;i++)  
{  
SID=(bit)(i_data&0x80);  
SCLK=0;  
SCLK=1;  
i_data=i_data<<1;  
}  
i_data=command_data;  
i_data&=0xf0;  
for(i=0;i<8;i++)  
{  
SID=(bit)(i_data&0x80);  
SCLK=0;  
SCLK=1;  
i_data=i_data<<1;  
}  
i_data=command_data ;  
data1=i_data&0xf0;  
data2=i_data&0x0f;  
data1>>=4;  
data2<<=4;  
i_data=data1|data2;  
i_data&=0xf0;  
for(i=0;i<8;i++)  
{  
SID=(bit)(i_data&0x80);  
SCLK=0;  
SCLK=1;  
i_data=i_data<<1;  
}  
CS=0;  
}  

void send_data(uchar command_data)  
{  
uchar i;  
uchar i_data,data1,  data2;
i_data=0xfa;  
delay_1ms(10);  
CS=1;  
for(i=0;i<8;i++)  
{  
SID=(bit)(i_data&0x80);  
SCLK=0;  
SCLK=1;  
i_data=i_data<< 1;  
}  
i_data=command_data;  
i_data&=0xf0;  
for(i=0;i<8;i++)  
{  
SID=(bit)(i_data&0x80);  
SCLK=0;  
SCLK=1;  
i_data=i_data<<1;  
}  
i_data =command_data;  
data1=i_data&0xf0;  
data2=i_data&0x0f;  
data1>>=4;  
data2<<=4;  
i_data=data1|data2;  
i_data&=0xf0;  
for(i=0;i<8;i++)  
{  
SID=(bit)(i_data&0x80);  
SCLK=0;  
SCLK=1;  
i_data=i_data<<1;  
}  
CS=0;  
} 



void lcd_init()  
{  
uchar command_data;  
delay_1ms(100);  
command_data=0x30;  
send_command(command_data); /*Function setting: send 8 bits of data at a time, basic instruction set*/  
command_data=0x04;  
send_command(command_data); /*Point setting: display character/cursor shifts from left to right, DDRAM address increases by 1*/  
command_data=0x0f;  
send_command(command_data); /*Display setting: turn on display, display cursor, current display bit flashes in reverse*/  
command_data=0x01;  
send_command(command_data); /*Clear DDRAM*/  
command_data=0x02;  
send_command(command_data); /*Return DDRAM address*/  
command_data=0x80;  
send_command(command_data); /*Set the display address to 0X80, which is the first position of the first line*/  
} 



void display_cpubbs()  
{  
uchar command_data;  
while(1)  
{  
command_data=0x01;  
send_command(command_data); /*Clear DDRAM*/  
command_data=0x80;  
send_command(command_data); /*Set the display address to 0X80, which is the first position of the first line*/   command_data=0x68; /* The encoding
of the word “h” */   send_data(command_data);   command_data=0x74;   send_data(command_data); /*The encoding of the word “t”*/   command_data=0x74;   send_data(command_data); /*The encoding of the word “t”*/   command_data=0x70;   send_data(command_data); /*The encoding of the word “p”*/   command_data=0x3a;   send_data(command_data); /*The encoding of the word “:”*/   command_data=0x2f;   send_data(command_data); /*Code for “/”*/   command_data=0x2f;   send_data(command_data); /*Code for “/”*/   command_data=0x57;   send_data(command_data); /*Code for “w”*/   command_data=0x57;   send_data(command_data); /*Code for “w”*/   command_data=0x57;   send_data(command_data); /*Code for “w”*/   command_data=0x2e;   send_data(command_data); /*Code for “.”*/   command_data=0x63;   send_data(command_data); /*Code for “c”*/   command_data=0x70;   send_data(command_data); /*Code for “p”*/   command_data=0x75;   send_data(command_data); /*Code for “u”*/   command_data=0x62;   send_data(command_data); /*code of “b”*/   command_data=0x90;   send_command(command_data); /*set the display address to 0X90, which is the first position of the second line, because the first line is full*/   command_data=0x62;   send_data(command_data); /*code of “b”*/   command_data=0x73;   send_data(command_data); /*code of “s”*/   command_data=0x2e;   send_data( command_data); /*code of “.”*/   command_data=0x63;   send_data(command_data); /*code of “c”*/   command_data=0x6f;   send_data(command_data); /*code of “o”*/   command_data=0x6d;   send_data(command_data); /*Encoding of the word “m”*/   delay_1ms(3000);   command_data=0x01;  
















































send_command(command_data); /*Clear DDRAM*/  
command_data=0x80;  
send_command(command_data); /*Set the display address to 0X80, which is the first position of the first line*/  

command_data=0xbb;  
send_data(command_data);  
command_data=0xb6;  
send_data(command_data); /*The code of the word “欢”*/  
command_data=0xd3;  
send_data(command_data);  
command_data=0xad;  
send_data(command_data); /*The code of the word “迎”*/  
command_data=0xb7;  
send_data(command_data);  
command_data=0xc3;  
send_data(command_data); /*The code of the word “访”*/  
command_data=0xce;  
send_data(command_data);  
command_data=0xca;  
send_data(command_data); /*Code for the word “问”*/  
command_data=0x90;  
send_command(command_data); /*Set the display address to 0X90, which is the first position of the second line, because the first line is full*/  
command_data=0x63;  
send_data(command_data); /*Code for the word “c”*/  
command_data=0x70;  
send_data(command_data); /*Code for the word “p”*/  
command_data=0x75;  
send_data(command_data); /*Code for the word “u”*/  
command_data=0x62;  
send_data(command_data); /*Code for the word “b”*/  
command_data=0x62;  
send_data(command_data); /*Code for the word “b”*/  
command_data=0x73;  
send_data(command_data); /*Code for the word “s”*/  
command_data=0xc2;  
send_data(command_data);  
command_data=0xdb;  
send_data(command_data); /*The encoding of the word “论”*/  
command_data=0x CC ;  
send_data(command_data);  
command_data=0xb3;  
send_data(command_data); /*The encoding of the word “坛”*/  
delay_1ms(3000);  
}  
} 



main()  
{  
uchar command_data;  
lcd_init();  
display_cpubbs();  
while(1);  
}