📄 7920._c
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//本程序是7920的LM3037的液晶驱动程序
//汉字2x9
//ATMEGA16, 内部晶振8M
//使用串行传输
//本程序测试通过
//绿叶子整理 -- 2005.08.30
#include <iom16v.h>
#include <macros.h>
#define LCD_DATA_PORT PORTA
#define LCD_DATA_DDR DDRA
#define LCD_DATA_PIN PINA
#define LCD_DATA 0x0ff //portA out
#define LCD_CONTROL_PORT PORTB
#define LCD_CONTROL_DDR DDRB
#define RS 0 //RS(CS) 可直接接VCC -- 替代
#define RW 1 //RW(SID)
#define E 2 //E(sclk)
#define PSB 3 //可以直接接地 -- 替代
#define _RES 4 //可以去掉
/*--------------------------------------------------------------------------------------------------
Public function prototypes
--------------------------------------------------------------------------------------------------*/
void delay_1us(void);
void delay_1ms(void);
void delay_nus (unsigned int n);
void delay_nms (unsigned int n);
#define SETBIT(x,y) (x|=(1<<y)) //set bit y in byte x
#define CLRBIT(x,y) (x&=(~(1<<y))) //clear bit y in byte x
#define CHKBIT(x,y) (x&(1<<y)) //check bit y in byte x
#define uchar unsigned char // 0~255
#define uint unsigned int // 0~65535
void CheckState();
void initLCDM(void);
void Send(unsigned char senddata);
void SdCmd(unsigned char scmd);
void SdData(unsigned char DData);
void WriteTextScreen(unsigned char *TxtData);
void WriteTextScreen2(unsigned char *pstr);
void WriteGraphicScreen(unsigned char *GDData);
void DispSetCursor(unsigned char LineNum, unsigned char ColumnNum);
/*
//-- TOPWAY LOGO 144x32 --
unsigned char GraphicLogo[]={
0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0x80,0x00,0x00,0x00,0x00,0x40,0x01,0x08,0x12,0x20,0x21,0x04,0x10,0x00,
0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x4F,0xE0,0x90,0x2A,0xA1,0xC1,0x04,
0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x42,0x07,0xFF,0x4A,0xA0,
0x49,0x04,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xF2,0x04,0x92,
0x0F,0xB8,0x45,0x1E,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x44,
0x02,0x94,0x10,0x53,0xF1,0x04,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x54,0x0F,0xFF,0x2F,0xD0,0x49,0x06,0x7C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x6F,0xC0,0x00,0x60,0x50,0xE5,0x0C,0x44,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x01,0xD4,0x41,0xFC,0x27,0x51,0x51,0xD4,0x44,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x44,0x41,0x04,0x25,0x22,0x5F,0x04,0x28,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x44,0x41,0xFC,0x25,0xA0,0x41,0x04,
0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x47,0xC1,0x04,0x29,0x50,
0x41,0x04,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC4,0x41,0xFC,
0x30,0x88,0x41,0x0D,0xC6,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x7C,0xE7,0x91,0x11,0x10,0x20,0x89,0xC7,0x1C,0xF8,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x14,0x51,0x29,0x10,0x20,0xDA,0x28,0xA2,0x08,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x14,0x51,0x44,0xA0,0x20,0xA8,0x28,
0x82,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x17,0x95,0x7C,0x40,0x20,
0xA8,0xC8,0x8C,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x14,0x15,0x44,
0x40,0x20,0x88,0x28,0x82,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x14,
0x15,0x44,0x40,0x20,0x8A,0x28,0xA2,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x10,0xE4,0x0A,0x44,0x40,0x3E,0x89,0xC7,0x1C,0x20,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x10,0x41,0x00,0x71,0xC0,0x00,0x20,0x00,0x18,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x30,0xC3,0x22,0x8A,0x20,0x00,0x00,0x00,0x08,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x11,0x45,0x14,0x08,0x20,0x3C,0x62,0x27,
0x08,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x12,0x49,0x08,0x30,0x40,0x22,
0x21,0x48,0x88,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x13,0xEF,0x88,0x08,
0x80,0x3C,0x20,0x8F,0x88,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x41,
0x14,0x89,0x00,0x20,0x21,0x48,0x08,0x08,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,
0x38,0x41,0x22,0x73,0xE0,0x20,0x72,0x27,0x1C,0xF0,0x00,0x00,0x00,0x01,0xC0,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03};
unsigned char TextLogo[]={
"专业生产: "
"液晶显示模块(LCDM)"};
*/
unsigned char TextLogo[]={"液晶显示模块(LCDM)"};
void initLCDM(void)
{
delay_nms(100);
//端口初始化
//LCD_DATA_DDR=0xFF;
LCD_CONTROL_DDR=0xFF;
CLRBIT(LCD_CONTROL_PORT,E);
CLRBIT(LCD_CONTROL_PORT,RW);
CLRBIT(LCD_CONTROL_PORT,RS);
CLRBIT(LCD_CONTROL_PORT,PSB);
//LCD_DATA_PORT|=0x0;
//delay_nms(1500);
LCD_DATA_PORT|=0xFF;
//SETBIT(LCD_CONTROL_PORT,_RES);
CLRBIT(LCD_CONTROL_PORT,_RES);
delay_nms(1);
SETBIT(LCD_CONTROL_PORT,_RES);
SdCmd(0x20); // 8bit I/F, basic command, graphic off
SdCmd(0x20); // 8bit I/F, basic command, graphic off
SdCmd(0x0C); // display on
SdCmd(0x06); // cursor right shift
SdCmd(0x01); // cursor right shift
}
/*-----------------------------------------------------
状态检查函数,判断是否处于忙状态
-------------------------------------------------------*/
void CheckState()
{
unsigned char dat;
CLRBIT(LCD_CONTROL_PORT,RS); //RS=0
SETBIT(LCD_CONTROL_PORT,RW); //RW=1
LCD_DATA_DDR=0x00; // portA as input
do
{
SETBIT(LCD_CONTROL_PORT,E);
NOP();
CLRBIT(LCD_CONTROL_PORT,E);
}
while (LCD_DATA_PIN&0x80);
}
void Send(unsigned char senddata)
{
unsigned char i;
for(i=0;i<8;i++)
{
if((senddata)&0x80)
{
//D_OUT=1 ;
SETBIT(LCD_CONTROL_PORT,RW);
}
else
{
//D_OUT=0;
CLRBIT(LCD_CONTROL_PORT,RW);
}
//SCK=1;
SETBIT(LCD_CONTROL_PORT,E);
NOP();
//SCK=0;
CLRBIT(LCD_CONTROL_PORT,E);
senddata<<=1;
}
}
void SdCmd(unsigned char scmd) //send command
{
//ST7920CS=1;
SETBIT(LCD_CONTROL_PORT,RS);
Send(0xf8);
Send(scmd&0xf0);
Send(scmd<<4);
//ST7920CS=0;
SETBIT(LCD_CONTROL_PORT,RS);
delay_nus(20);
}
void SdData(unsigned char DData)
{
//ST7920CS=1;
SETBIT(LCD_CONTROL_PORT,RS);
Send(0xfa);
Send(DData&0xf0);
Send(DData<<4);
//ST7920CS=0;
SETBIT(LCD_CONTROL_PORT,RS);
delay_nus(20);
}
/*
//-----------------------------------
// Write a Screen
//-----------------------------------
void WriteGraphicScreen(unsigned char *GDData)
// DisplayData should be 144x32/8 = 576byte
// and graphic screen=on
{
uchar TempData;
uchar i, j;
for(i=0;i<0x20;i++)
{
SdCmd(0x34); // 8bit I/F, extend command
SdCmd(0x80|i); // Y address
SdCmd(0x80); // X address
SdCmd(0x36); // 8bit I/F, basic command, graphic on
for(j=0;j<0x09;j++)
{
TempData=(*(GDData+(i*18)+(j*2)+0)); // send high-byte
SdData(TempData);
TempData=(*(GDData+(i*18)+(j*2)+1)); // send low-byte
SdData(TempData);
}
}
}
void WriteTextScreen(unsigned char *TxtData)
// DisplayData should be (9x2)x2 = 32byte
// and graphic screen=off
{
unsigned char TempData;
unsigned char j;
SdCmd(0x24); // 8bit I/F, basic command
SdCmd(0x20); // 8bit I/F, basic command, graphic off
SdCmd(0x80); // first line
for(j=0;j<0x09;j++)
{
TempData=(*(TxtData+0+(j*2)+0)); // send high-byte --汉字前半部
SdData(TempData);
TempData=(*(TxtData+0+(j*2)+1)); // send low-byte --汉字后半部
SdData(TempData);
}
SdCmd(0x90); // second line
for(j=0;j<0x09;j++)
{
TempData=(*(TxtData+18+(j*2)+0)); // send high-byte
SdData(TempData);
TempData=(*(TxtData+18+(j*2)+1)); // send low-byte
SdData(TempData);
}
}
*/
void main(void)
{
CLI(); // disable interrupts
initLCDM();
while(1)
{
SdCmd(0x20); // 8bit I/F, basic command, graphic off
SdCmd(0x01); // clr text screen
delay_nms(100);
/*WriteGraphicScreen(GraphicLogo);
delay_nms(1500);*/
WriteTextScreen2("世界你好12345678901234567890");
delay_nms(1500);
WriteTextScreen2(TextLogo);
delay_nms(1500);
}
}
void DispSetCursor(unsigned char LineNum, unsigned char ColumnNum)
{
unsigned char i=0x00;
switch(LineNum&0x0f) //确定行号
{
case 0x00:
i=0x80;
break;
case 0x01:
i=0x90;
break;
case 0x02:
i=0x88;
break;
case 0x03:
i=0x98;
break;
default :
break;
}
i = (ColumnNum&0x0f)|i; //确定列号
SdCmd(i);
}
void WriteTextScreen2(unsigned char *pstr)
{
unsigned char i;
unsigned char j;
SdCmd(0x34); // 8bit I/F, basic command
SdCmd(0x30); // 8bit I/F, basic command, graphic off
for(i=0;i<36;i++) //清空屏幕
{
if (i%18==0) //判断是否换行
{
DispSetCursor(i/18,0); //如换行, 则光标移动到行首
}
SdData(' '); //
}
j=0;
//while (*pstr)
while (*pstr && j<36)
{
if (j%18==0) //判断是否换行
{
DispSetCursor(j/18,0); //如换行, 则光标移动到行首
}
//避免最后一格写半个汉字, 把汉字写到下一行
if (((j+1)%18==0) && *pstr>127 && *(pstr-1)<128)
{
SdData(' '); //
j++;
}
else
{
SdData(*pstr++);
j++;
}
//SdData(*pstr++);
//j++;
}
}
/*-----------------------------------------------------------------------
延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
void delay_1us(void) //1us延时函数
{
asm("nop");
}
void delay_nus(unsigned int n) //N us延时函数
{
unsigned int i=0;
for (i=0;i<n;i++)
delay_1us();
}
void delay_1ms(void) //1ms延时函数
{
unsigned int i;
for (i=0;i<1140;i++);
}
void delay_nms(unsigned int n) //N ms延时函数
{
unsigned int i=0;
for (i=0;i<n;i++)
delay_1ms();
}
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