STM32的SPI库文件

/** * @author Tilen Majerle * @email tilen@majerle.eu * @website http://stm32f4-discovery.com * @link http://stm32f4-discovery.com/2014/04/library-05-spi-for-stm32f4xx/ * @version v2.0 * @ide Keil uVision * @license GNU GPL v3 * @brief SPI library for STM32F4xx