12864lcd程序(串行方式)
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发表于 6/30/2010 4:58:00 PM
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//FileName:12864lcds.h
/*************************************
** start51 study board test software
** test 12864LCD
** using serial interface
** author:bluehacker<kernelpaniccrash AT gmail.com>
** QQ:282074921
** Date:2007-11-18
**************************************/
#ifndef _LZP_START51_12864LCDS_H
#define _LZP_START51_12864LCDS_H
#include "reg52.h"
//12864串行口定义
sbit LCD_CS=P2^0;
sbit LCD_CLK=P2^2;
sbit LCD_SID=P2^1;
//12864LCD指令定义
#define CMD_CLEAR 0x01
#define CMD_RESET 0x02
//设置波特率
#define OSC_FREQ 11059200L
#define CMD_CLEAR 0x01
#define CMD_RESET 0x02
//设置波特率
#define OSC_FREQ 11059200L
#define BAUD_115200 256 - (OSC_FREQ/192L)/115200L // 255
#define BAUD_57600 256 - (OSC_FREQ/192L)/57600L // 254
#define BAUD_38400 256 - (OSC_FREQ/192L)/38400L // 253
#define BAUD_28800 256 - (OSC_FREQ/192L)/28800L // 252
#define BAUD_19200 256 - (OSC_FREQ/192L)/19200L // 250
#define BAUD_14400 256 - (OSC_FREQ/192L)/14400L // 248
#define BAUD_9600 256 - (OSC_FREQ/192L)/9600L // 244
void Delay_us(unsigned char nUs);
void Delay_ms(unsigned int nMs);
#define BAUD_57600 256 - (OSC_FREQ/192L)/57600L // 254
#define BAUD_38400 256 - (OSC_FREQ/192L)/38400L // 253
#define BAUD_28800 256 - (OSC_FREQ/192L)/28800L // 252
#define BAUD_19200 256 - (OSC_FREQ/192L)/19200L // 250
#define BAUD_14400 256 - (OSC_FREQ/192L)/14400L // 248
#define BAUD_9600 256 - (OSC_FREQ/192L)/9600L // 244
void Delay_us(unsigned char nUs);
void Delay_ms(unsigned int nMs);
bit lcd_busy(void);
void write_command(unsigned char cmd);
unsigned char read_data(void);
void write_data(unsigned char dat);
void clear_lcd();
void lcd_init();
void lcd_setxy(unsigned char x,unsigned char y);
void lcd_display_str(unsigned char x, unsigned char y,unsigned char *str);
#endif
void write_command(unsigned char cmd);
unsigned char read_data(void);
void write_data(unsigned char dat);
void clear_lcd();
void lcd_init();
void lcd_setxy(unsigned char x,unsigned char y);
void lcd_display_str(unsigned char x, unsigned char y,unsigned char *str);
#endif
//FileName:12864lcds.c
/*************************************
** start51 study board test software
** test 12864LCD
** using serial interface
** author:bluehacker<kernelpaniccrash AT gmail.com>
** QQ:282074921
** Date:2007-11-18
**************************************/
/*************************************
** start51 study board test software
** test 12864LCD
** using serial interface
** author:bluehacker<kernelpaniccrash AT gmail.com>
** QQ:282074921
** Date:2007-11-18
**************************************/
#include "12864lcds.h"
bit lcd_busy()
{
unsigned char i;
bit dat;
//先产生连续5个'1'
LCD_CS=1;
for(i=0;i<5;i++)
{
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
}
//再发送一个'1'，表示读操作
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
//再发送一个'0',表示写命令操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'0'，这是表示第一个字节结束
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//Delay_us(1);
dat="0";
LCD_CLK=0;
dat="LCD"_SID;
LCD_CLK=1;
LCD_CS=0;
return dat;
}
{
unsigned char i;
bit dat;
//先产生连续5个'1'
LCD_CS=1;
for(i=0;i<5;i++)
{
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
}
//再发送一个'1'，表示读操作
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
//再发送一个'0',表示写命令操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'0'，这是表示第一个字节结束
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//Delay_us(1);
dat="0";
LCD_CLK=0;
dat="LCD"_SID;
LCD_CLK=1;
LCD_CS=0;
return dat;
}
void write_command(unsigned char cmd)
{
unsigned char i;
while(lcd_busy());
//先产生连续5个'1'
LCD_CS=1;
for(i=0;i<5;i++)
{
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
}
//再发送一个'0'，表示写操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'0',表示写命令操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'0'，这是表示第一个字节结束
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//下面发送具体指令，先发送高4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
if(cmd&0x80)
LCD_SID=1;
else
LCD_SID=0;
LCD_CLK=1;
cmd<<=1;
}
//发送连续4个'0'
for(i=0;i<4;i++)
{
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
}
//下面发送指令的低4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
if(cmd&0x80)
LCD_SID=1;
else
LCD_SID=0;
LCD_CLK=1;
cmd<<=1;
}
//发送连续4个'0'
for(i=0;i<4;i++)
{
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
}
LCD_CS=0;//结束
}
{
unsigned char i;
while(lcd_busy());
//先产生连续5个'1'
LCD_CS=1;
for(i=0;i<5;i++)
{
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
}
//再发送一个'0'，表示写操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'0',表示写命令操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'0'，这是表示第一个字节结束
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//下面发送具体指令，先发送高4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
if(cmd&0x80)
LCD_SID=1;
else
LCD_SID=0;
LCD_CLK=1;
cmd<<=1;
}
//发送连续4个'0'
for(i=0;i<4;i++)
{
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
}
//下面发送指令的低4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
if(cmd&0x80)
LCD_SID=1;
else
LCD_SID=0;
LCD_CLK=1;
cmd<<=1;
}
//发送连续4个'0'
for(i=0;i<4;i++)
{
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
}
LCD_CS=0;//结束
}
void write_data(unsigned char dat)
{
unsigned char i;
while(lcd_busy());
//先产生连续5个'1'
LCD_CS=1;
for(i=0;i<5;i++)
{
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
}
//再发送一个'0'，表示写操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'1',表示写数据操作
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
//再发送一个'0'，这是表示第一个字节结束
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//下面发送具体数据，先发送高4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
if(dat&0x80)
LCD_SID=1;
else
LCD_SID=0;
LCD_CLK=1;
dat<<=1;
}
//发送连续4个'0'
for(i=0;i<4;i++)
{
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
}
//下面发送数据的低4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
if(dat&0x80)
LCD_SID=1;
else
LCD_SID=0;
LCD_CLK=1;
dat<<=1;
}
//发送连续4个'0'
for(i=0;i<4;i++)
{
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
}
LCD_CS=0;//结束
}
unsigned char read_data()
{
unsigned char i,dat;
while(lcd_busy());
//先产生连续5个'1'
LCD_CS=1;
for(i=0;i<5;i++)
{
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
}
//再发送一个'1'，表示读操作
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//再发送一个'1',表示数据操作
LCD_CLK=0;
LCD_SID=1;
LCD_CLK=1;
//再发送一个'0'，这是表示第一个字节结束
LCD_CLK=0;
LCD_SID=0;
LCD_CLK=1;
//下面读具体数据
//先读高4位
dat="0";
for(i=0;i<4;i++)
{
LCD_CLK=0;
dat<<=1;
LCD_CLK=1;
dat|=LCD_SID;
}
//再接受4个连续'0'，没什么意义，直接丢掉
for(i=0;i<4;i++)
{
LCD_CLK=0;
Delay_us(1);
LCD_CLK=1;
Delay_us(1);
}
//接受低4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
dat<<=1;
LCD_CLK=1;
dat|=LCD_SID;
}
//再接受4个连续'0'，没什么意义，直接丢掉
for(i=0;i<4;i++)
{
LCD_CLK=0;
Delay_us(1);
LCD_CLK=1;
Delay_us(1);
}
LCD_CS=0;
return dat;
}
//先读高4位
dat="0";
for(i=0;i<4;i++)
{
LCD_CLK=0;
dat<<=1;
LCD_CLK=1;
dat|=LCD_SID;
}
//再接受4个连续'0'，没什么意义，直接丢掉
for(i=0;i<4;i++)
{
LCD_CLK=0;
Delay_us(1);
LCD_CLK=1;
Delay_us(1);
}
//接受低4位
for(i=0;i<4;i++)
{
LCD_CLK=0;
dat<<=1;
LCD_CLK=1;
dat|=LCD_SID;
}
//再接受4个连续'0'，没什么意义，直接丢掉
for(i=0;i<4;i++)
{
LCD_CLK=0;
Delay_us(1);
LCD_CLK=1;
Delay_us(1);
}
LCD_CS=0;
return dat;
}
void clear_lcd()
{
write_command(CMD_CLEAR);
}
{
write_command(CMD_CLEAR);
}
void lcd_setxy(unsigned char x,unsigned char y)
{
unsigned char addr;
switch(y)
{
case 0:
addr="0x80"+x;
break;
case 1:
addr="0x90"+x;
break;
case 2:
addr="0x88"+x;
break;
case 3:
addr="0x98"+x;
break;
}
write_command(addr);
}
{
unsigned char addr;
switch(y)
{
case 0:
addr="0x80"+x;
break;
case 1:
addr="0x90"+x;
break;
case 2:
addr="0x88"+x;
break;
case 3:
addr="0x98"+x;
break;
}
write_command(addr);
}
void lcd_display_str(unsigned char x, unsigned char y,unsigned char *str)
{
unsigned char i;
lcd_setxy(x,y);
for(i=0;str[i]!='\0';i++)
{
write_data(str[i]);
}
}
{
unsigned char i;
lcd_setxy(x,y);
for(i=0;str[i]!='\0';i++)
{
write_data(str[i]);
}
}
void lcd_init()
{
write_command(CMD_RESET);
write_command(0x0d);//设置显示状态，整体显示ON,游标与游标位置ON
write_command(0x30);//功能设置，基本指令
write_command(0x18);//游标与显示移位控制
clear_lcd();
//write_command(0x80);//设置DDRAM位址,并不必须
}
void main()
{
TCON="0";
SCON="0x50";/*mode 1,1 start bit ,8 data bit ,1 stop bit,enable receive*/
PCON="0x80";/*SMOD=1, Baud Rate twice*/
TMOD="0x21";/*timer 0--mode 1 and timer 1 ---mode2*/
//set baud rate,use timer 1 as baud rate generator
TH1=BAUD_19200;
TL1=TH1;
TR1=1;
// ET1=0;//disable timer 1 interrupt
EA="0";
lcd_init();
Delay_ms(100);
//显示武林外传
{
TCON="0";
SCON="0x50";/*mode 1,1 start bit ,8 data bit ,1 stop bit,enable receive*/
PCON="0x80";/*SMOD=1, Baud Rate twice*/
TMOD="0x21";/*timer 0--mode 1 and timer 1 ---mode2*/
//set baud rate,use timer 1 as baud rate generator
TH1=BAUD_19200;
TL1=TH1;
TR1=1;
// ET1=0;//disable timer 1 interrupt
EA="0";
lcd_init();
Delay_ms(100);
//显示武林外传
lcd_setxy(1,2);
write_data(0xce);
write_data(0xe4);
lcd_setxy(2,2);
write_data(0xc1);
write_data(0xd6);
lcd_setxy(3,2);
write_data(0xcd);
write_data(0xe2);
lcd_setxy(4,2);
write_data(0xb4);
write_data(0xab);
Delay_ms(5000);
clear_lcd();
write_command(CMD_RESET);
Delay_ms(5000);
lcd_display_str(2,0,"bluehacker");
lcd_display_str(1,1,"QQ:282074921");
lcd_display_str(3,2,"李正平");
while(1)
{
}
}
write_data(0xce);
write_data(0xe4);
lcd_setxy(2,2);
write_data(0xc1);
write_data(0xd6);
lcd_setxy(3,2);
write_data(0xcd);
write_data(0xe2);
lcd_setxy(4,2);
write_data(0xb4);
write_data(0xab);
Delay_ms(5000);
clear_lcd();
write_command(CMD_RESET);
Delay_ms(5000);
lcd_display_str(2,0,"bluehacker");
lcd_display_str(1,1,"QQ:282074921");
lcd_display_str(3,2,"李正平");
while(1)
{
}
}
