时钟极性CPOL：即SPI空闲时，时钟信号SCLK的电平（1是空闲时高电平，0是空闲时低电平）。 时钟相位CPHA：即SPI在SCLK第几个边沿开始采样（0是第一个边沿开始，1是第二个边沿开始） 6.transfer () 该功能用于传输1B的数据，参数为发送的数据，返回值为接收到的数据。

In fact, transaction support in the Arduino library is something [Paul] worked on himself, and gets around the problem of having SPI-related code happening in both the main loop of a program and ...

Arduino enthusiasts or those looking to learn more about programming with Arduino and electronics-in-general may be interested in a new Kickstarter campaign and Arduino compatible 42-Digit SPI ...

A new fully featured Arduino development board has been created called the Prestissimo Uno+ which is now available to back via Kickstarter with earlybird ...