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AM2301温湿度传感器测试
根据温湿度传感器驱动电路，实物连接图如下：
图5-7 AM2301连线图
给单片机上电，则可在LCD屏幕上得到如下数据：
图5-8 AM2301采集数据
LCD屏幕第一行显示当前室内湿度情况，第二行显示当前室内温度情况，若用吹风机对其吹风，则温湿度会相应变化。
附录
主要程序源代码：
1.REG52.H
/*-------------------------------------------------------------------------- REG52.H
Header file for generic 80C52 and 80C32 microcontroller.
Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc. All rights reserved.
--------------------------------------------------------------------------*/
#ifndef __REG52_H__ #define __REG52_H__
/* BYTE Registers */ sfr P0 = 0x80; sfr P1 = 0x90; sfr P2 = 0xA0; sfr P3 = 0xB0; sfr PSW = 0xD0; sfr ACC = 0xE0; sfr B = 0xF0; sfr SP = 0x81; sfr DPL = 0x82; sfr DPH = 0x83; sfr PCON = 0x87; sfr TCON = 0x88; sfr TMOD = 0x89; sfr TL0 = 0x8A; sfr TL1 = 0x8B; sfr TH0 = 0x8C; sfr TH1 = 0x8D; sfr IE = 0xA8; sfr IP = 0xB8; sfr SCON = 0x98; sfr SBUF = 0x99;
/* 8052 Extensions */ sfr T2CON = 0xC8; sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB; sfr TL2 = 0xCC; sfr TH2 = 0xCD;
/* BIT Registers */ /* PSW */
sbit CY = PSW^7; sbit AC = PSW^6; sbit F0 = PSW^5; sbit RS1 = PSW^4; sbit RS0 = PSW^3; sbit OV = PSW^2;
sbit P = PSW^0; //8052 only
/* TCON */
sbit TF1 = TCON^7; sbit TR1 = TCON^6; sbit TF0 = TCON^5; sbit TR0 = TCON^4; sbit IE1 = TCON^3; sbit IT1 = TCON^2; sbit IE0 = TCON^1; sbit IT0 = TCON^0;
/* IE */
sbit EA = IE^7;
sbit ET2 = IE^5; //8052 only sbit ES = IE^4; sbit ET1