dht21程序

迫切需要用stc12c5a60s2单片机显示dht11温湿度传感器程序及基本读数和定时...DHT 11程序# include # include//typedefunsignedcharu 8；/* DefinedForUnsigned 8 bits integerablexd无符号8位整数变量*/typedefsignedchars 8；/* definedforsigned 8 bitsintegerablexd有符号8位整数变量*/typedefunsigned int u16；/* definedforunsigned 16位无符号16位整数变量*/typedefsigned int 16；/* definedforsigned 16位integerablexd有符号16位整数变量*/typedefunsignedlongu 32；/* definedforunsigned 32位无符号32位整数变量*/typedefsignedlongs 32；/*definedforsigne 。

push-pull也可以拉到0，但是怎么确认实测真的输出0呢？试着去掉升高的电阻，看看有没有变化。哎，你的STM32微控制器GPIO口配置的是推挽输出，在DHT21数据口上肯定是不能拉的。该端口必须配置为开漏输出，上拉电阻用于为DHT21提供负载能力。手册上不是写了吗？

3、dht11 程序

# include # include//typedefunsignedcharu 8；/* DefinedForUnsigned 8 bits integerablexd无符号8位整数变量*/typedefsignedchars 8；/* definedforsigned 8 bitsintegerablexd有符号8位整数变量*/typedefunsigned int u16；/* definedforunsigned 16位无符号16位整数变量*/typedefsigned int 16；/* definedforsigned 16位integerablexd有符号16位整数变量*/typedefunsignedlongu 32；/* definedforunsigned 32位无符号32位整数变量*/typedefsignedlongs 32；/*definedforsigne 。