TTP229觸摸模塊的51單片機(jī)驅(qū)動(dòng)程序

ID:517466 · 發(fā)表于 2019-5-22 14:08

網(wǎng)購(gòu)了一塊TTP229的觸摸模塊。模塊中實(shí)際使用的是8229BSF集成塊。本人用STC89C52搭建了測(cè)試電路。用12864液晶顯示。
顯示01-16，表示16個(gè)按鈕的對(duì)應(yīng)值。

制作出來(lái)的實(shí)物圖如下：

單片機(jī)源程序如下:

/*********************************************************************************
* 【作者】：
* 【版本】：
* 【函數(shù)功能】：利用單線制DS18B20溫度傳感器, 并在液晶12864上顯示
* 【使用說(shuō)明】：觸摸板P1的第一和第三跳線短接
**********************************************************************************/
#include <reg52.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
// 液晶現(xiàn)實(shí)屬區(qū)區(qū)
uchar code pic1[];
uchar code pic2[];
uchar code pic3[];
/* 液晶控制接口 -----------------------------------------------*/
sbit RS = P0^7;
sbit WRD = P0^6;
sbit E = P0^5;
sbit PSB = P0^4;
sbit RES = P0^3;
sbit sign = P1^0;
sbit sign1 = P1^1;
// TTP229接口
sbit SDA=P1^2;
sbit SCL=P1^3;
// 溫度傳感器接口
sbit DQ=P3^7; //數(shù)據(jù)傳輸線接單片機(jī)的相應(yīng)的引腳
/* 溫度測(cè)量用變量定義 -----------------------------------------------*/
unsigned char tempL=0; //設(shè)全局變量
unsigned char tempH=0;
unsigned int sdate;//測(cè)量到的溫度的整數(shù)部分
unsigned char xiaoshu1;//小數(shù)第一位
unsigned char xiaoshu2;//小數(shù)第二位
unsigned char xiaoshu;//兩位小數(shù)
bit fg=1; //溫度正負(fù)標(biāo)志
// 液晶處理函數(shù)
void TransferData(char data1,bit DI);
void display(void);
void display_grapic(void);
void delayms(uint n);
void DisplayLine(uchar line1,uchar line2);
void DisplayGraphic(uchar *adder);
void delay(uint m);
void lcd_mesg(uchar *adder1);
void delay1ms(unsigned int t);
// 18B20溫度傳感器函數(shù)
void ReadTemperature(void);
void Init_DS18B20(void);
unsigned char ReadOneChar();
void WriteOneChar(unsigned char dat);
void Delay10us(unsigned int t);
void Initial_com(void);
// 掃描TTP229電容觸摸鍵盤(pán)模塊
unsigned int TTP229B(void);
/********************************************************************
* 名稱 : Convert(uchar In_Dat)
* 功能 : 因?yàn)殡娐吩O(shè)計(jì)時(shí)，P2.0--P2.7接法剛好了資料中的相反，所以設(shè)計(jì)該函數(shù)。
* 輸入 : 1602資料上的值
* 輸出 : 送到1602的值
***********************************************************************/
unsigned char Convert(uchar In_Dat) {
uchar i, Out_Dat;
for(i=0; i<8; i++){
Out_Dat= In_Dat;
}
return Out_Dat;
}
void initinal(void) { //LCD字庫(kù)初始化程序
delay(40); //大于40MS的延時(shí)程序
PSB=1; //設(shè)置為8BIT并口工作模式
delay(1); //延時(shí)
RES=0; //復(fù)位
delay(1); //延時(shí)
RES=1; //復(fù)位置高
delay(10);
TransferData(0x30,0); //Extended Function Set :8BIT設(shè)置,RE=0: basic instruction set, G=0 :graphic display OFF
delay(100); //大于100uS的延時(shí)程序
TransferData(0x30,0); //Function Set
delay(37); ////大于37uS的延時(shí)程序
TransferData(0x08,0); //Display on Control
delay(100); //大于100uS的延時(shí)程序
TransferData(0x10,0); //Cursor Display Control光標(biāo)設(shè)置
delay(100); //大于100uS的延時(shí)程序
TransferData(0x0C,0); //Display Control,D=1,顯示開(kāi)
delay(100); //大于100uS的延時(shí)程序
TransferData(0x01,0); //Display Clear
delay(10); //大于10mS的延時(shí)程序
TransferData(0x06,0); //Enry Mode Set,光標(biāo)從右向左加1位移動(dòng)
delay(100); //大于100uS的延時(shí)程序
}
/********************************************************************
* 名稱 : initina2()
* 功能 : 主函數(shù)
* 輸入 : 無(wú)
* 輸出 : 無(wú)
***********************************************************************/
void initina2(void) //LCD顯示圖片(擴(kuò)展)初始化程序
{
delay(40); //大于40MS的延時(shí)程序
PSB=1; //設(shè)置為8BIT并口工作模式
delay(1); //延時(shí)
RES=0; //復(fù)位
delay(1); //延時(shí)
RES=1; //復(fù)位置高
delay(10);
TransferData(0x36,0); //Extended Function Set RE=1: extended instruction
delay(100); //大于100uS的延時(shí)程序
TransferData(0x36,0); //Extended Function Set:RE=1: extended instruction set
delay(37); ////大于37uS的延時(shí)程序
TransferData(0x3E,0); //EXFUNCTION(DL=8BITS,RE=1,G=1)
delay(100); //大于100uS的延時(shí)程序
TransferData(0x01,0); //CLEAR SCREEN
delay(100); //大于100uS的延時(shí)程序
}
/********************************************************************
* 名稱 : Main()
* 功能 : 主函數(shù)
* 輸入 : 無(wú)
* 輸出 : 無(wú)
***********************************************************************/
void main(void) {
uchar init18B20[]={
"溫度傳感器18B20 "
"初始化中...... "
" "
" "
};
uchar curtemp[]={
"當(dāng)前溫度： "
" "
" "
" "
};
uchar IC_DAT2[]={
"白日依山盡， " //0x80
"欲窮千里目， " //0x90
"黃河入海流。 " //0x88
"更上一層樓。 " //0x98
};
unsigned int key=0;
// 初始化串口
Initial_com();
initinal(); //調(diào)用LCD字庫(kù)初始化程序
delay(100); //大于100uS的延時(shí)程序
lcd_mesg(IC_DAT2); //顯示中文漢字2
delayms(80);
sign = 0;
// 顯示溫度傳感器18B20初始化中
initinal(); //調(diào)用LCD字庫(kù)初始化程序
delay(100); //大于100uS的延時(shí)程序
lcd_mesg(init18B20); //顯示中文漢字1
delay(240);
delay(240);
Init_DS18B20(); //初始化
sign = 1;
delayms(80);
SDA=1;
SCL=1;
while(1) {
sign1 = 0;
// 初始化溫度傳感器并取得當(dāng)前溫度
ReadTemperature();
sign1=1;
SBUF=sdate;
delayms(20);
SBUF=xiaoshu;
// 轉(zhuǎn)換溫度數(shù)據(jù)為字符串
// 整數(shù)部分
curtemp[10]=48+sdate/10;
curtemp[11]=48+sdate%10;
// 小數(shù)點(diǎn)
curtemp[12]='.';
// 小數(shù)部分
//curtemp[13]=48+xiaoshu/10;
curtemp[13]=48+xiaoshu1;
curtemp[14]=48+xiaoshu2;
delayms(20);
// 讀鍵盤(pán)，顯示按鈕標(biāo)號(hào)
key = TTP229B();
curtemp[16]='K';
curtemp[17]='e';
curtemp[18]='y';
curtemp[19]=':';
curtemp[20]=key/10 + 48;
curtemp[21]=key%10 + 48;
lcd_mesg(curtemp); //顯示按鈕編號(hào)
}
}
/********************************************************************
* 名稱 : lcd_mesg()
* 功能 : 輸出信息到LCD
* 輸入 : adder1 字符串信息
* 輸出 : 無(wú)
***********************************************************************/
void lcd_mesg(unsigned char *adder1) {
unsigned char i;
TransferData(0x80,0); //Set Graphic Display RAM Address
delay(100);
for(i=0;i<32;i++) {
TransferData(*adder1,1);
adder1++;
}
TransferData(0x90,0); //Set Graphic Display RAM Address
delay(100);
for(i=32;i<64;i++) {
TransferData(*adder1,1);
adder1++;
}
}
/********************************************************************
* 名稱 : TTP229B()
* 功能 : 掃描TTP229電容鍵盤(pán)（16按鍵）函數(shù)
* 觸摸結(jié)果直接輸出只有8個(gè)，平時(shí)輸出低電平，觸摸按鍵鍵后，對(duì)應(yīng)輸出腳為高電平
* 同時(shí)觸摸按鍵，只有第一個(gè)生效
* 輸入 : 無(wú)
* 輸出 : 按鍵編號(hào)
***********************************************************************/
unsigned int TTP229B(void) {
uchar key=0;
unsigned char i;
unsigned int temp=0x0000;
SDA=0;
delay(100);
SDA=1;
delay(20);
for(i=0;i<16;i++) {
SCL=0;
_nop_();;
SCL=1;
_nop_();;
if(SDA==0) {
temp|=(1<<i);
}
}
for (i=0;i<16;i++) {
if ((temp & (1<<i)) > 0) {
key=i+1;
}
}
delayms(32);
return key;
}
/********************************************************************
* 名稱 : TransferData()
* 功能 : 主函數(shù)
* 輸入 : 無(wú)
* 輸出 : 無(wú)
***********************************************************************/
void TransferData(char data1,bit DI) { //傳送數(shù)據(jù)或者命令,當(dāng)DI=0是,傳送命令,當(dāng)DI=1,傳送數(shù)據(jù).
WRD=0;
RS=DI;
delay(1);
P2=Convert(data1);
E=1;
delay(1);
E=0;
}
/********************************************************************
* 名稱 : delayms()
* 功能 : 主函數(shù)
* 輸入 : 無(wú)
* 輸出 : 無(wú)
***********************************************************************/
void delayms(unsigned int n) { //延時(shí)10×n毫秒程序
unsigned int i,j;
for(i=0;i<n;i++)
for(j=0;j<2000;j++);
}
///********************************************************************
//* 名稱 : Main()
//* 功能 : 主函數(shù)
//* 輸入 : 無(wú)
//* 輸出 : 無(wú)
//***********************************************************************/
//void delay(unsigned int m) { //延時(shí)程序
// unsigned int i,j;
// for(i=0;i<m;i++)
// for(j=0;j<10;j++);
//}
/********************************************************************
* 名稱 : DisplayGraphic()
* 功能 : 主函數(shù)
* 輸入 : 無(wú)
* 輸出 : 無(wú)
***********************************************************************/
void DisplayGraphic(unsigned char *adder) {
int i,j;
//*******顯示上半屏內(nèi)容設(shè)置
for(i=0;i<32;i++) { //
TransferData((0x80 + i),0); //SET 垂直地址 VERTICAL ADD
TransferData(0x80,0); //SET 水平地址 HORIZONTAL ADD
for(j=0;j<16;j++)
{
TransferData(*adder,1);
adder++;
}
}
//*******顯示下半屏內(nèi)容設(shè)置
for(i=0;i<32;i++) {
TransferData((0x80 + i),0); //SET 垂直地址 VERTICAL ADD
TransferData(0x88,0); //SET 水平地址 HORIZONTAL ADD
for(j=0;j<16;j++) {
TransferData(*adder,1);
adder++;
}
}
}
unsigned char code pic2[]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x1E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x07,0x80,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x03,0xC0,0x01,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x78,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x00,0x00,0x1E,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x07,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x03,0xC0,0x00,0x00,0x01,0xC0,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x70,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x3C,0x00,0x00,0x00,0x00,0x1C,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x1E,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x03,0xC0,0x00,0x00,0x00,0x00,0x7E,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x0F,0x00,0x00,0x00,0x00,0x01,0xE6,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x3C,0x00,0x00,0x00,0x00,0x07,0x82,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x1E,0x02,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0xE0,0x00,0x00,0x00,0x00,0x78,0x03,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0xE0,0x00,0x00,0x00,0x01,0xE0,0x03,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0x78,0x00,0x00,0x00,0x07,0x80,0x01,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x03,0x1E,0x00,0x00,0x00,0x1E,0x00,0x07,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x03,0x07,0x80,0x00,0x00,0x78,0x00,0x1F,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x02,0x01,0xE0,0x00,0x01,0xE0,0x00,0x3F,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x06,0x00,0x78,0x1F,0x07,0x80,0x01,0xF1,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0E,0x00,0x1E,0x3F,0x9E,0x00,0x03,0xF9,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0E,0x00,0x07,0xB3,0x78,0x00,0x0F,0xF9,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0x80,0x01,0xFF,0xE0,0x00,0x79,0x98,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0xE0,0x00,0x7F,0x80,0x00,0xE0,0xD8,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0xF8,0x00,0x0C,0x00,0x07,0xE0,0xF8,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0E,0x7E,0x00,0x0C,0x00,0x1F,0xF0,0xF8,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0E,0x1F,0x80,0x0C,0x00,0x7E,0x70,0xDC,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0x07,0xE0,0x0C,0x01,0xE3,0x70,0x5C,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0x81,0xF8,0x0C,0x07,0x83,0x70,0x5F,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0D,0xE0,0x7E,0x0C,0x1F,0xC1,0xF0,0x5F,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0x78,0x3F,0x8C,0x7F,0xC1,0xB8,0x47,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0x1E,0x0F,0xED,0xEC,0xE1,0xB8,0xC7,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x07,0x83,0xFF,0xC6,0xE1,0xB9,0xC7,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x07,0xE0,0xFF,0xE7,0xE1,0xBF,0x07,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x07,0xF8,0x3F,0xE7,0xE1,0xBF,0x07,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x07,0x9E,0x0C,0xE6,0xE1,0x8F,0x07,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x07,0x87,0x8C,0xE6,0xE3,0x8F,0x83,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x0F,0x81,0xED,0xE6,0xE7,0x0F,0x83,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x07,0x00,0x7F,0xE6,0xFE,0x0F,0x83,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0x00,0x00,0x1E,0x76,0xFE,0x0F,0x83,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1E,0x00,0x00,0x00,0x72,0x1E,0x0F,0x83,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1E,0x00,0x00,0x00,0x7E,0x1A,0x0F,0x83,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1E,0x00,0x00,0x00,0x7C,0x1A,0x0F,0x83,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0C,0x00,0x00,0x00,0x78,0x1A,0x0F,0x83,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78,0x1A,0x07,0x83,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1E,0x07,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1F,0x07,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1F,0x07,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1F,0x07,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1F,0x07,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1F,0x00,0x00,0x00,0x00,0x08,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7C,0x1F,0x00,0x00,0x00,0x00,0x10,0x00,0x40,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x1F,0x00,0x00,0x00,0x00,0xFF,0x08,0x20,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x1F,0x00,0x00,0x00,0x00,0x28,0x05,0xFC,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x34,0x0C,0x00,0x00,0x00,0x00,0x48,0x00,0x40,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x34,0x00,0x00,0x00,0x00,0x00,0xFF,0x08,0x88,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x34,0x00,0x00,0x00,0x00,0x00,0x08,0x05,0xFC,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x00,0x00,0x00,0x00,0x00,0x4A,0x00,0xA8,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x00,0x00,0x00,0x00,0x00,0x89,0x04,0xA8,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x01,0x08,0x88,0xA8,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x10,0xAA,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x01,0x2E,
};
/*
********************************************************************************
** 函數(shù)名稱： delay(unsigned char i)
** 函數(shù)功能：延時(shí)函數(shù) 這個(gè)延時(shí)程序的具體延時(shí)時(shí)間是time=i*8+10,適用于小于2ms的延時(shí)
********************************************************************************
*/
void delay(unsigned int i)
{
while(i--);
}
/*
********************************************************************************
** 函數(shù)名稱： delay1ms(unsigned char i)
** 函數(shù)功能：延時(shí)函數(shù)
********************************************************************************
*/
void delay1ms(unsigned int t)
{
//for(i=124;i>0;i--); //延時(shí)124*8+10=1002us
unsigned char a,b,c;
for(t;t>0;t--)
for(c=1;c>0;c--)
for(b=142;b>0;b--)
for(a=2;a>0;a--);
}
/*
********************************************************************************
** 函數(shù)名稱： Init_DS18B20(void)
** 函數(shù)功能：初始化
********************************************************************************
*/
void Init_DS18B20(void)
{
unsigned char x=0;
DQ=1; //DQ先置高
Delay10us(60);//最小480，最大960
DQ=0; //發(fā)送復(fù)位脈沖
Delay10us(60);//最小480，最大960
DQ=1; //拉高數(shù)據(jù)線
Delay10us(6);//15-60us
// x=DQ; //用X的值來(lái)判斷初始化有沒(méi)有成功，18B20存在的話X=0，否則X=1
//delay(20);
while(DQ==0);
DQ=1;//讓傳感器釋放總線，避免影響下一步
}
/*
********************************************************************************
** 函數(shù)名稱： ReadOneChar()
** 函數(shù)功能：讀一個(gè)字節(jié)
********************************************************************************
*/
unsigned char ReadOneChar() //主機(jī)數(shù)據(jù)線先從高拉至低電平1us以上，再使數(shù)據(jù)線升為高電平，從而產(chǎn)生讀信號(hào)
{
unsigned char dat=0;
unsigned char mask,fmask;
for(mask=0x01;mask!=0;mask<<=1)//一個(gè)周期需要至少60us，但采樣要在15us內(nèi)完成
{
DQ=0;
_nop_();
DQ=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
if(DQ==0)//讀0
{
fmask=~mask;
dat=dat&fmask;
}
else
{
dat|=mask;
}
Delay10us(5);
DQ=1;
}
return dat;
}
/*
********************************************************************************
** 函數(shù)名稱： WriteOneChar(unsigned char dat)
** 函數(shù)功能：寫(xiě)一個(gè)字節(jié)
//一個(gè)寫(xiě)周期為60-120us，主機(jī)在15--45us內(nèi)對(duì)信號(hào)采樣
********************************************************************************
*/
void WriteOneChar(unsigned char dat)
{
unsigned char i=0; //數(shù)據(jù)線從高電平拉至低電平，產(chǎn)生寫(xiě)起始信號(hào)。15us之內(nèi)將所需寫(xiě)的位送到數(shù)據(jù)線上，
for(i=8;i>0;i--) //在15~60us之間對(duì)數(shù)據(jù)線進(jìn)行采樣，如果是高電平就寫(xiě)1，低寫(xiě)0發(fā)生。
{
DQ=0; //在開(kāi)始另一個(gè)寫(xiě)周期前必須有1us以上的高電平恢復(fù)期。
DQ=dat&0x01;
Delay10us(6);//15-60us采樣
DQ=1;
dat>>=1;
}
delay(4);
}
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