STC15F2K60S2单片机/DHT11/OLED12864/串口通信

STC15F2K60S2单片机…DHT11…OLED12864…串口通信

本节教程我们来重点讲一讲DHT11温湿度传感器的用法以及实现程序

一、先斩后奏，上程序！

1、dh11.c

/*****************************************DHT11温湿度传感器+OLED12864显示程序**********************************/
/*************************************************吉大电协2019.12.6*******************************************/
#include "stc15f2k60s2.h"
#include "intrins.h"
#include "uart.h"
#include "stdio.h"
#include "string.h"
#include "codetab.h"
#include "LQ12864.h"
#define uint unsigned int
#define uchar unsigned char
//sbit DATA=P3^4;
#define DATA P34
//#define DATA P3^4//这样宏定义在编译的时候会报错，具体的看我写的一篇文章，在问题解决分类里面，有详细的解释
int RLL,RHH,CLL,CHH; //用于储存温湿度的数据定义
char DAMPH[8],TEMPH[8],DAMPL[8],TEMPL[8];//用于储存温湿度的字符型数组定义
char dot[1]=".";//小数点

void delayus(uchar n)  //定义延时为us级的延时函数                       
{
  while(n--); 
}

void delay_ms(uint z)//定义延时为ms级的延时函数
{
  uint x,y;
  for(x=z;x>0;x--)
  for(y=614;y>0;y--);
}

void Delay1000ms()//定义延时为1s的延时函数		
{
	unsigned char i, j, k;
	_nop_();
	_nop_();
	i = 43;
	j = 6;
	k = 203;
	do
	{
		do
		{
			while (--k);
		} while (--j);
	} while (--i);
}

void Start()
{
	DATA=0;//将总线拉低
	delay_ms(20);//延时20ms，确保延时大于18ms，这样DHT11可以检测到起始信号，然后就可以开始发出响应信号
	DATA=1;//将总线拉高
	delayus(30);
	DATA=1;
}

int readdht11_byte() //定义一个以字节为单位的函数，分别读取dht11发送的40bits的数据
{   
  int i,dht;  
  for(i=8;i>0;i--)//下面的这个循环实现读取八个bit的数据
  {      
    dht=dht<<1;//每次读取前，将数据的高位移位向左移位
    while(!DATA);//等待DHT11的50us低电平数据分隔信号过去
	delayus(35);//数据低电平分隔信号过去后，等待35us，然后再判断，具体为什么要等待，待下文分晓
    if(DATA==1) //如果延时35us后，信号还是高电平的话，那么就执行if里面的程序
  	{
      dht=dht|0x01;//dht的最低位置1，其他的位不改变
      delayus(55);//再延时55us，等待高电平信号过去
    }   
    else;//如果延时35us后，是低电平的话，那么就什么都不执行，在下一次if循化，dht数据移位的时候，会自动把最低位置为0，然后向左移位             
  } 
  return(dht);//将这个dht返回   
}

void read_dht11() //定义一个读取DHT11返回的40bits的数据的函数
{
  Start();//先让DHT11开始工作
  if(!DATA)//如果DHT11发出低电平信号响应的话，就执行下面的这段程序
  {   
    while(!DATA);//等待低电平响应信号过去
    while(DATA);//再等待DHT11低电平响应信号之后的一段80us的高电平确认信号过去
    RHH=readdht11_byte();//读取湿度的整数位
    RLL=readdht11_byte();//读取湿度的小数位
    CHH=readdht11_byte();//读取温度的整数位
    CLL=readdht11_byte();//读取温度的小数位
   }  
}

void Trans()//将读取的温湿度转换成字符型
{
	sprintf(TEMPH,"%d",CHH);//将温度整数位转换成字符
	sprintf(TEMPL,"%d",CLL/1000);//将温度的小数位转换成字符
	sprintf(DAMPH,"%d",RHH);
	sprintf(DAMPL,"%d",RLL/10000);
	strcat(TEMPH,dot);//将小数点和温度的整数位合成一串字符
	strcat(TEMPH,TEMPL);//将合成后的温度整数位+小数点与温度的小数位合成一串字符
	strcat(DAMPH,dot);
	strcat(DAMPH,DAMPL);
}

void main()
{	
    OLED_Init();//初始化OLED
    OLED_CLS(); //OLED清屏		
	OLED_P8x16Str(0,2,"TEMP:");//在OLED上面显示TEMP:字符串
	OLED_P8x16Str(64,2,"DAMP:");         
	OLED_P8x16Str(100,6,"RAA");
	Uart_Init();//串口程序初始化
	while(1)//循环执行下面的这段代码
	{
		read_dht11();//读取DHT11的数值
		Delay1000ms();//延时1s,因为DHT11的刷新频率在1s 左右
		Trans();//将读取的数据转换成一串字符
		Send_String("TEMP NOW: ");//在串口上显示这段内容
		Send_String(TEMPH);//将温度值发送到串口上
		Send_String("\r\n");//另取一行
		Send_String("DAMP NOW: ");
		Send_String(DAMPH);
		Send_String("\r\n");
		OLED_P8x16Str(0,4,TEMPH);//在OLED上显示出当前温度值
		OLED_P8x16Str(64,4,DAMPH);	
	}
}

2、uart.h

这是串口通信相关的程序，如果对串口通信不太清楚的话，可以看我另一篇博客,链接如下
STC15F2K60S2串口通信/波特率设置/通信初始化/发送（接收）一个数据教程

//串口初始化程序；115200bps;晶振11.0592MHz;串口方式1;T1 8为自动重装载模式
#include "stc15f2k60s2.h"
                       
void Uart_Init(void)//串口初始化程序；115200bps;晶振11.0592MHz;串口方式1
{
  SCON = 0x50;//设置为八位可变波特率
  AUXR = 0x40;//定时器1设置为1T模式
  TMOD = 0x20;//定时器1为模式2（八位自动重载）
  TL1 = 0xFD;//设置波特率重装值
  TH1 = 0xFD;		
  TR1 = 1;//开启定时器1
  ES = 1;//打开串口中断
  EA = 1;//打开总中断
}

void Send_Byte(unsigned char dat)//发送一个字节数据的函数
{
	SBUF = dat;//将dat的值传给SBUF寄存器，然后寄存器发送数据到串口上
	while (TI == 0);//等待数据发送完毕（数据发送完毕后，TI会自己置1）
  TI=0;//手动清零
}

void Send_String(char *buf)//定义一个发送字符串的函数
{
	while(*buf != '\0')//检测这个字符串是否到结尾
	{
		Send_Byte(*buf++);//发送字符串中的每一位
	}
}

3、codetab.h

/************************************6*8的点阵************************************/
const unsigned char code F6x8[][6] =
{
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,// sp
	0x00, 0x00, 0x00, 0x2f, 0x00, 0x00,// !
	0x00, 0x00, 0x07, 0x00, 0x07, 0x00,// "
	0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14,// #
	0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12,// $
	0x00, 0x62, 0x64, 0x08, 0x13, 0x23,// %
	0x00, 0x36, 0x49, 0x55, 0x22, 0x50,// &
	0x00, 0x00, 0x05, 0x03, 0x00, 0x00,// '
	0x00, 0x00, 0x1c, 0x22, 0x41, 0x00,// (
	0x00, 0x00, 0x41, 0x22, 0x1c, 0x00,// )
	0x00, 0x14, 0x08, 0x3E, 0x08, 0x14,// *
	0x00, 0x08, 0x08, 0x3E, 0x08, 0x08,// +
	0x00, 0x00, 0x00, 0xA0, 0x60, 0x00,// ,
	0x00, 0x08, 0x08, 0x08, 0x08, 0x08,// -
	0x00, 0x00, 0x60, 0x60, 0x00, 0x00,// .
	0x00, 0x20, 0x10, 0x08, 0x04, 0x02,// /
	0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E,// 0
	0x00, 0x00, 0x42, 0x7F, 0x40, 0x00,// 1
	0x00, 0x42, 0x61, 0x51, 0x49, 0x46,// 2
	0x00, 0x21, 0x41, 0x45, 0x4B, 0x31,// 3
	0x00, 0x18, 0x14, 0x12, 0x7F, 0x10,// 4
	0x00, 0x27, 0x45, 0x45, 0x45, 0x39,// 5
	0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30,// 6
	0x00, 0x01, 0x71, 0x09, 0x05, 0x03,// 7
	0x00, 0x36, 0x49, 0x49, 0x49, 0x36,// 8
	0x00, 0x06, 0x49, 0x49, 0x29, 0x1E,// 9
	0x00, 0x00, 0x36, 0x36, 0x00, 0x00,// :
	0x00, 0x00, 0x56, 0x36, 0x00, 0x00,// ;
	0x00, 0x08, 0x14, 0x22, 0x41, 0x00,// <
	0x00, 0x14, 0x14, 0x14, 0x14, 0x14,// =
	0x00, 0x00, 0x41, 0x22, 0x14, 0x08,// >
	0x00, 0x02, 0x01, 0x51, 0x09, 0x06,// ?
	0x00, 0x32, 0x49, 0x59, 0x51, 0x3E,// @
	0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C,// A
	0x00, 0x7F, 0x49, 0x49, 0x49, 0x36,// B
	0x00, 0x3E, 0x41, 0x41, 0x41, 0x22,// C
	0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C,// D
	0x00, 0x7F, 0x49, 0x49, 0x49, 0x41,// E
	0x00, 0x7F, 0x09, 0x09, 0x09, 0x01,// F
	0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A,// G
	0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F,// H
	0x00, 0x00, 0x41, 0x7F, 0x41, 0x00,// I
	0x00, 0x20, 0x40, 0x41, 0x3F, 0x01,// J
	0x00, 0x7F, 0x08, 0x14, 0x22, 0x41,// K
	0x00, 0x7F, 0x40, 0x40, 0x40, 0x40,// L
	0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F,// M
	0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F,// N
	0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E,// O
	0x00, 0x7F, 0x09, 0x09, 0x09, 0x06,// P
	0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E,// Q
	0x00, 0x7F, 0x09, 0x19, 0x29, 0x46,// R
	0x00, 0x46, 0x49, 0x49, 0x49, 0x31,// S
	0x00, 0x01, 0x01, 0x7F, 0x01, 0x01,// T
	0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F,// U
	0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F,// V
	0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F,// W
	0x00, 0x63, 0x14, 0x08, 0x14, 0x63,// X
	0x00, 0x07, 0x08, 0x70, 0x08, 0x07,// Y
	0x00, 0x61, 0x51, 0x49, 0x45, 0x43,// Z
	0x00, 0x00, 0x7F, 0x41, 0x41, 0x00,// [
	0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55,// 55
	0x00, 0x00, 0x41, 0x41, 0x7F, 0x00,// ]
	0x00, 0x04, 0x02, 0x01, 0x02, 0x04,// ^
	0x00, 0x40, 0x40, 0x40, 0x40, 0x40,// _
	0x00, 0x00, 0x01, 0x02, 0x04, 0x00,// '
	0x00, 0x20, 0x54, 0x54, 0x54, 0x78,// a
	0x00, 0x7F, 0x48, 0x44, 0x44, 0x38,// b
	0x00, 0x38, 0x44, 0x44, 0x44, 0x20,// c
	0x00, 0x38, 0x44, 0x44, 0x48, 0x7F,// d
	0x00, 0x38, 0x54, 0x54, 0x54, 0x18,// e
	0x00, 0x08, 0x7E, 0x09, 0x01, 0x02,// f
	0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C,// g
	0x00, 0x7F, 0x08, 0x04, 0x04, 0x78,// h
	0x00, 0x00, 0x44, 0x7D, 0x40, 0x00,// i
	0x00, 0x40, 0x80, 0x84, 0x7D, 0x00,// j
	0x00, 0x7F, 0x10, 0x28, 0x44, 0x00,// k
	0x00, 0x00, 0x41, 0x7F, 0x40, 0x00,// l
	0x00, 0x7C, 0x04, 0x18, 0x04, 0x78,// m
	0x00, 0x7C, 0x08, 0x04, 0x04, 0x78,// n
	0x00, 0x38, 0x44, 0x44, 0x44, 0x38,// o
	0x00, 0xFC, 0x24, 0x24, 0x24, 0x18,// p
	0x00, 0x18, 0x24, 0x24, 0x18, 0xFC,// q
	0x00, 0x7C, 0x08, 0x04, 0x04, 0x08,// r
	0x00, 0x48, 0x54, 0x54, 0x54, 0x20,// s
	0x00, 0x04, 0x3F, 0x44, 0x40, 0x20,// t
	0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C,// u
	0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C,// v
	0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C,// w
	0x00, 0x44, 0x28, 0x10, 0x28, 0x44,// x
	0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C,// y
	0x00, 0x44, 0x64, 0x54, 0x4C, 0x44,// z
	0x14, 0x14, 0x14, 0x14, 0x14, 0x14,// horiz lines
};
/****************************************8*16的点阵************************************/
const unsigned char code F8X16[]=	  
{
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
  0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1
  0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2
  0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3
  0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4
  0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5
  0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6
  0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7
  0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8
  0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9
  0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10
  0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14
  0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15
  0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16
  0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17
  0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18
  0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19
  0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20
  0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21
  0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22
  0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23
  0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24
  0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25
  0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26
  0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27
  0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28
  0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29
  0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30
  0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31
  0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32
  0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33
  0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34
  0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35
  0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36
  0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37
  0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38
  0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39
  0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40
  0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41
  0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42
  0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43
  0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44
  0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45
  0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46
  0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47
  0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48
  0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49
  0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50
  0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51
  0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52
  0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53
  0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54
  0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55
  0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56
  0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57
  0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58
  0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59
  0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\ 60
  0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61
  0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62
  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63
  0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64
  0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65
  0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66
  0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67
  0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68
  0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69
  0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70
  0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71
  0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72
  0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73
  0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74
  0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75
  0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76
  0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77
  0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78
  0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79
  0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80
  0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81
  0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82
  0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83
  0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84
  0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85
  0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86
  0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87
  0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88
  0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89
  0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90
  0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91
  0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92
  0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93
  0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94
};

4、LQ12864.h

本期我们不讲OLED12864的使用，以后会专门有一节去讲

#include "stc15f2k60s2.h"

sbit SCL=P2^3; //串行时钟
sbit SDA=P2^2; //串行数据

#define high 1
#define low 0

#define	Brightness	0xCF 
#define X_WIDTH 	128
#define Y_WIDTH 	64
/*********************OLED驱动程序用的延时程序************************************/
void delay(unsigned int z)
{
	unsigned int x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}

/**********************************************
//IIC Start
**********************************************/
void IIC_Start()
{
   SCL = high;		
   SDA = high;
   SDA = low;
   SCL = low;
}

/**********************************************
//IIC Stop
**********************************************/
void IIC_Stop()
{
   SCL = low;
   SDA = low;
   SCL = high;
   SDA = high;
}

/**********************************************
// 通过I2C总线写一个字节
**********************************************/
void Write_IIC_Byte(unsigned char IIC_Byte)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		if(IIC_Byte & 0x80)
			SDA=high;
		else
			SDA=low;
		SCL=high;
		SCL=low;
		IIC_Byte<<=1;
	}
	SDA=1;
	SCL=1;
	SCL=0;
}

/*********************OLED写数据************************************/ 
void OLED_WrDat(unsigned char IIC_Data)
{
	IIC_Start();
	Write_IIC_Byte(0x78);
	Write_IIC_Byte(0x40);			//write data
	Write_IIC_Byte(IIC_Data);
	IIC_Stop();
}
/*********************OLED写命令************************************/
void OLED_WrCmd(unsigned char IIC_Command)
{
	IIC_Start();
	Write_IIC_Byte(0x78);            //Slave address,SA0=0
	Write_IIC_Byte(0x00);			//write command
	Write_IIC_Byte(IIC_Command);
	IIC_Stop();
}
/*********************OLED 设置坐标************************************/
void OLED_Set_Pos(unsigned char x, unsigned char y) 
{ 
	OLED_WrCmd(0xb0+y);
	OLED_WrCmd(((x&0xf0)>>4)|0x10);
	OLED_WrCmd((x&0x0f)|0x01);
} 

/*********************OLED复位************************************/
void OLED_CLS(void)
{
	unsigned char y,x;
	for(y=0;y<8;y++)
	{
		OLED_WrCmd(0xb0+y);
		OLED_WrCmd(0x01);
		OLED_WrCmd(0x10);
		for(x=0;x<X_WIDTH;x++)
		OLED_WrDat(0);
	}
}
/*********************OLED初始化************************************/
void OLED_Init(void)
{
	delay(500);//初始化之前的延时很重要！
	OLED_WrCmd(0xae);//--turn off oled panel
	OLED_WrCmd(0x00);//---set low column address
	OLED_WrCmd(0x10);//---set high column address
	OLED_WrCmd(0x40);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)
	OLED_WrCmd(0x81);//--set contrast control register
	OLED_WrCmd(Brightness); // Set SEG Output Current Brightness
	OLED_WrCmd(0xa1);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常
	OLED_WrCmd(0xc8);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常
	OLED_WrCmd(0xa6);//--set normal display
	OLED_WrCmd(0xa8);//--set multiplex ratio(1 to 64)
	OLED_WrCmd(0x3f);//--1/64 duty
	OLED_WrCmd(0xd3);//-set display offset	Shift Mapping RAM Counter (0x00~0x3F)
	OLED_WrCmd(0x00);//-not offset
	OLED_WrCmd(0xd5);//--set display clock divide ratio/oscillator frequency
	OLED_WrCmd(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec
	OLED_WrCmd(0xd9);//--set pre-charge period
	OLED_WrCmd(0xf1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
	OLED_WrCmd(0xda);//--set com pins hardware configuration
	OLED_WrCmd(0x12);
	OLED_WrCmd(0xdb);//--set vcomh
	OLED_WrCmd(0x40);//Set VCOM Deselect Level
	OLED_WrCmd(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02)
	OLED_WrCmd(0x02);//
	OLED_WrCmd(0x8d);//--set Charge Pump enable/disable
	OLED_WrCmd(0x14);//--set(0x10) disable
	OLED_WrCmd(0xa4);// Disable Entire Display On (0xa4/0xa5)
	OLED_WrCmd(0xa6);// Disable Inverse Display On (0xa6/a7) 
	OLED_WrCmd(0xaf);//--turn on oled panel
	OLED_Set_Pos(0,0);
} 

/*******************功能描述：显示8*16一组标准ASCII字符串	 显示的坐标（x,y），y为页范围0～7****************/
void OLED_P8x16Str(unsigned char x, y,unsigned char ch[])
{
	unsigned char c=0,i=0,j=0;
	while (ch[j]!='\0')
	{
		c =ch[j]-32;
		if(x>120){x=0;y++;}
		OLED_Set_Pos(x,y);
		for(i=0;i<8;i++)
		OLED_WrDat(F8X16[c*16+i]);
		OLED_Set_Pos(x,y+1);
		for(i=0;i<8;i++)
		OLED_WrDat(F8X16[c*16+i+8]);
		x+=8;
		j++;
	}
}

以上就是具体的几个主要程序。大多数解释已经在程序中的备注中解释了

二、有关DHT11用法的说明

下面这个技术文档，我在这里大致总结一下要点
DHT11是这样工作的：
1、单片机先在DHT11 DATA引脚相连的那个总线上拉低电平（20MS左右，一定要大于18ms）
2、DHT11做出回应，DATA先会将总线拉低80us，然后再拉高80us
3、DHT11开始发送数据，每个数据之间用50us的低电平间隔；0用26—28us的高电平表示，1用70us的高电平表示

是不是很简单？