湿度传感器与单片机连接（The humidity sensor is connected with the singlechip）.doc

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湿度传感器与单片机连接（The humidity sensor is connected with the singlechip）.doc

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湿度传感器与单片机连接（The humidity sensor is connected with the singlechip）

湿度传感器与单片机连接（The humidity sensor is connected with the singlechip） DHT11 usage paradigm SCM: / / AT89S51 / / function: serial port baud rate 9600 humidity data / / hardware connection: P2.0 port for communication port to connect to the DHT11, DHT11 and power supply and connecting one of the microcontroller, the microcontroller serial MAX232 connected computer //****************************************************************// #include reg51.h #include intrins.h / / Typedef unsigned char U8 defined for unsigned 8-bits integer; / * variable unsigned 8 bit integer variables. Typedef signed char S8 defined for signed 8-bits integer; / * variable signed 8 bit integer variables. Typedef unsigned int U16 defined for unsigned 16-bits integer; / * variable unsigned 16 bit integer variables. Typedef signed int S16 defined for signed 16-bits integer; / * variable signed 16 bit integer variables. Typedef unsigned long U32 defined for unsigned 32-bits integer; / * variable unsigned 32 bit integer variables. Typedef signed long S32 defined for signed 32-bits integer; / * variable signed 32 bit integer variables. Typedef float F32 single precision floating point; / * variable (32bits) single precision floating point number (32 digits). Typedef double F64 double precision floating point; / * variable (64bits) double precision floating-point number (64 digits). / / #define uchar unsigned char #define uint unsigned int #define Data_0_time 4 //----------------------------------------------// //----------------IO port is defined --------------------// //----------------------------------------------// Sbit P2_0 = P2^0; Sbit P2_1 = P2^1; Sbit P2_2 = P2^2; Sbit P2_3 = P2^3; //----------------------------------------------// //---------------- defined area --------------------// //----------------------------------------------// U8, U8FLAG, k; U8, U8count, U8temp; U8, U8T_data_H, U8T_data_L, U8RH_data_H, U8RH_data_L, U8checkdata; U8, U8T_data_H_temp, U8T_data_L_temp, U8RH_data_H_temp, U8R