该功能用于初始化SPI通信。 设置通信时钟。时钟信号由主机产生，从机不用配置。但主机的SPI时钟频率应该在从机允许的处理速度范围内。 ~ SPI_CLOCK_DIV4，4分频（默认配置）； ~ SPI_CLOCK_DIV8，8分频； ...

At this point it’s something of a given that a member of the ESP8266 family is likely your best bet if you want to cobble together a small Internet-connected gadget. Costing as little as $3 USD, this ...

Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I document my learning in order to be able to inspire other people to make ...