* @brief This file provides a set of functions needed to manage the SDIO SD * Card memory mounted on STM32xx-EVAL board (refer to stm32_eval.h * to know about the boards supporting this memory). * It implements a high level communication layer for read and write * from/to this memory. The needed STM32 hardware resources (SDIO and * GPIO) are defined in stm32xx_eval.h file, and the initialization is * performed in SD_LowLevel_Init() function declared in stm32xx_eval.c * file. * You can easily tailor this driver to any other development board, * by just adapting the defines for hardware resources and * SD_LowLevel_Init() function.