C51單片機(jī)IIC接口PCF8574T模塊驅(qū)動(dòng)程序 1602/2004LCD

ID:683123 · 發(fā)表于 2021-2-22 20:14

借鑒ynzsc001用戶(hù)提供的前期代碼加以改善。親測(cè)89，12,15系列都可以用。幾個(gè)顯示函數(shù)比較方便。分享給大家

單片機(jī)源程序如下:

#include <reg52.h>
#include "intrins.h"
#define uchar unsigned char
#define uint unsigned int
sbit SCL = P3^0;
sbit SDA = P3^1;
uchar i;
char ADDR = 0x4E; // PCF8574 T
// char ADDR = 0x7e; // PCF8574 AT //如是后綴AT的用這個(gè)地址
uchar code CGCODE[]={
0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02,//年0x00
0x0F,0x09,0x0F,0x09,0x0F,0x09,0x13,0x00,//月0x01
0x0F,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00,//日0x02
0x18,0x1B,0x04,0x04,0x04,0x04,0x04,0x03,//攝氏度0x03
0x1F,0x0A,0x0A,0x1F,0x0A,0x0A,0x0A,0x12,//開(kāi)0x04
0x11,0x0A,0x1F,0x04,0x1F,0x04,0x0A,0x11,//關(guān)0x05
0x00,0x04,0x04,0x04,0x04,0x15,0x0E,0x04,//向下0x06
0x00,0x04,0x0E,0x15,0x04,0x04,0x04,0x04//向上0x07
};
//***************************** 延遲函數(shù) ms ***********************************************
void delay1(int y) //
{
;
while(y--)
{
unsigned char a,b,c;
for(c=1;c>0;c--)
for(b=142;b>0;b--)
for(a=2;a>0;a--);
}
}
//******************************** IIC開(kāi)始********************************************
void IIC_start(void)
{
SDA=1;
_nop_();
SCL=1;
_nop_();_nop_(); _nop_();_nop_();_nop_();
SDA=0;
_nop_();_nop_();_nop_();_nop_();_nop_();
SCL=0;
}
//********************************** IIC 寫(xiě)字節(jié) ******************************************
void IIC_writeByte(char temp)
{
char i;
for(i=0;i<8;i++)
{
SDA=(bit)(temp & 0x80) ; //
temp <<=1;
_nop_();_nop_();
SCL=1;
_nop_();_nop_();_nop_();_nop_(); _nop_();
SCL=0;
}
_nop_(); _nop_();_nop_();_nop_();
SDA=1;
_nop_(); _nop_(); _nop_();_nop_();
SCL=1;
_nop_();_nop_();_nop_();
while(SDA);
_nop_();
SCL=0;
}
//******************************** 1602寫(xiě)命令 ********************************************
void LCD_write_command(char comm)
{
char tmp;
IIC_start();
IIC_writeByte(ADDR);
tmp = comm & 0xF0;
tmp |= 0x0C;
IIC_writeByte(tmp);
delay1(20);
tmp &= 0xFB; //Make EN = 0
IIC_writeByte(tmp);
tmp = (comm & 0x0F) << 4 ;
tmp |= 0x0C; //RS = 0, RW = 0, EN = 1
IIC_writeByte(tmp);
delay1(20);
tmp &= 0xFB; // Make EN = 0
IIC_writeByte(tmp);
}
//******************************** 1602寫(xiě)數(shù)據(jù) ********************************************
void LCD_write_data(char data1)
{
char tmp;
IIC_start();
IIC_writeByte(ADDR);
tmp = data1 & 0xF0;
tmp |= 0x0D; //RS = 0, RW = 0, EN = 1
IIC_writeByte(tmp);
delay1(20);
tmp &= 0xFB; //Make EN = 0
IIC_writeByte(tmp);
tmp = (data1 & 0x0F) << 4 ;
tmp |= 0x0D; //RS = 0, RW = 0, EN = 1
IIC_writeByte(tmp);
delay1(20);
tmp &= 0xFB ; // Make EN = 0
IIC_writeByte(tmp);
}
//******************************** 1602初始化 ********************************************
void UserDiy()
{
unsigned char i;
LCD_write_command(0x40); //設(shè)置CGRAM地址,自定義字符共8個(gè)
for(i=0;i<64;i++)
{
LCD_write_data(CGCODE[i]);
}
}
void Init_Lcd(void)
{
LCD_write_command(0x33); //
delay1(50) ;
LCD_write_command(0x32); //
delay1(50) ;
LCD_write_command(0x28); //
delay1(50) ;
LCD_write_command(0x0C); //
delay1(50) ;
LCD_write_command(0x06); //
delay1(50) ;
LCD_write_command(0x01); //
delay1(50) ;
UserDiy();
}
/*****************次方函數(shù)***********************/
int NumberPow(int x,int y)
{
unsigned char i;
int Result=1;
for(i=0;i<y;i++)
{
Result*=x;
}
return Result;
}
//************************設(shè)置第幾行第幾列***************************
void SetHL(unsigned x,unsigned y)
{
if(x==1)
LCD_write_command(0x80|(y-1));
if(x==2)
LCD_write_command(0x80|(y-1)+0x40);
}
//**************************第幾行，第幾列，顯示數(shù)字，數(shù)字幾位************************
void LCDShowNumber(unsigned char x,unsigned char y,unsigned int Number,unsigned char NumberLength)
{
unsigned char i;
SetHL(x,y);
for(i=NumberLength;i>0;i--)
{
LCD_write_data('0'+Number/NumberPow(10,i-1)%10); /*加'0'是將數(shù)字轉(zhuǎn)換成ASCLL碼*/
}
}
//*************************************** 第x行第x列寫(xiě)字串符 *************************************
void LCDShowString(unsigned char x,unsigned char y,unsigned char String[]) /*unsigned char Char[]=unsigned char *Char*/
{
unsigned char i;
SetHL(x,y);
for(i=0;String[i]!='\0';i++) /*Char[]{"abc"}=Char[]{'a','b','c','\0'},'\0'為結(jié)束標(biāo)志位*/
{
LCD_write_data(String[i]);
}
}
/*第幾行第幾列顯示一個(gè)字符*/
void LCDShowChar(unsigned char x,unsigned char y,unsigned char Char)
{
SetHL(x,y);
LCD_write_data(Char);
}
/********************************主函數(shù)****************************/
void main()
{
Init_Lcd();
LCDShowChar(1,1,0x00);
LCDShowChar(1,2,0x01);
LCDShowChar(1,3,0x02);
LCDShowChar(1,4,0x03);
LCDShowChar(1,5,0x04);
LCDShowChar(1,6,0x05);
LCDShowChar(1,7,0x06);
LCDShowChar(1,8,0x07);
LCDShowString(1,9,"abcdefgf");
while(1)
{
for(i=1;i<100;i++)
{
LCDShowNumber(1,2,i,3);
delay1(1000);
}
i=0;
}
}

復(fù)制代碼

ID:683123 · 發(fā)表于 2021-2-22 20:17

lCD2004第三行地址是0X14,第四行地址是0x54；

ID:947166 · 發(fā)表于 2021-7-5 17:15

我用的stc12c5a60s2，沒(méi)效果，是要對(duì)延時(shí)進(jìn)行調(diào)整么

ID:974414 · 發(fā)表于 2021-11-8 20:55

感謝樓主分享程序，不過(guò)里面的delay1函數(shù)是毫秒級(jí)別，在包括初始化，寫(xiě)cmd，寫(xiě)dat的函數(shù)里面根本不用毫秒級(jí)的延遲，建議使用
void delay(u16 us)
{
while(us--);
}

ID:546224 · 發(fā)表于 2022-7-24 09:35

在STC15W408AS上親測(cè)可用

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C51單片機(jī)IIC接口PCF8574T模塊驅(qū)動(dòng)程序 1602/2004LCD

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