mbed OS SDCard Driver for GR-PEACH.
Dependents: mbed-os-storage-access GR-PEACH_Digital_Signage GR-PEACH-mbed-os-storage-access
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If you want to access at high speed, you need to change it as follows.
SDBlockDevice_GR_PEACH/SDBlockDevice_GR_PEACH.h
SDBlockDevice_GR_PEACH() : SDBlockDevice(P8_5, P8_6, P8_3, P8_4), _sd_cd(P7_8), _connect(false) { // Set SPI clock rate to 20MHz for data transfer // It is necessary to change "private" of "SDBlockDevice.h" to "pretected". _transfer_sck = 20000000; }
SDBlockDevice_GR_PEACH/sd-driver/features/filesystem/sd/SDBlockDevice.h
private: int _cmd(int cmd, int arg); : -> protected: int _cmd(int cmd, int arg); :