stmhal: Enable sdcard on STM32F7DISC board.

stmhal/boards/STM32F7DISC/mpconfigboard.h

@@ -4,7 +4,7 @@
 #define MICROPY_HW_MCU_NAME         "STM32F746"
 
 #define MICROPY_HW_HAS_SWITCH       (1)
-#define MICROPY_HW_HAS_SDCARD       (0)
+#define MICROPY_HW_HAS_SDCARD       (1)
 #define MICROPY_HW_HAS_MMA7660      (0)
 #define MICROPY_HW_HAS_LIS3DSH      (0)
 #define MICROPY_HW_HAS_LCD          (0)
@@ -78,6 +78,11 @@ void STM32F7DISC_board_early_init(void);
 #define MICROPY_HW_LED_ON(pin)      (pin->gpio->BSRR = pin->pin_mask)
 #define MICROPY_HW_LED_OFF(pin)     (pin->gpio->BSRR = (pin->pin_mask << 16))
 
+// SD card detect switch
+#define MICROPY_HW_SDCARD_DETECT_PIN        (pin_C13)
+#define MICROPY_HW_SDCARD_DETECT_PULL       (GPIO_PULLUP)
+#define MICROPY_HW_SDCARD_DETECT_PRESENT    (GPIO_PIN_RESET)
+
 // USB config (CN13 - USB OTG FS)
 // The Hardware VBUS detect only works on pin PA9. The STM32F7 Discovery uses
 // PA9 for VCP_TX functionality and connects the VBUS to pin J12 (so software

stmhal/sdcard.c

@@ -37,6 +37,34 @@
 
 #if MICROPY_HW_HAS_SDCARD
 
+#if defined(MCU_SERIES_F7)
+
+// The F7 series calls the peripheral SDMMC rather than SDIO, so provide some
+// #defines for backwards compatability.
+
+#define SDIO    SDMMC1
+
+#define SDIO_CLOCK_EDGE_RISING              SDMMC_CLOCK_EDGE_RISING
+#define SDIO_CLOCK_EDGE_FALLING             SDMMC_CLOCK_EDGE_FALLING
+
+#define SDIO_CLOCK_BYPASS_DISABLE           SDMMC_CLOCK_BYPASS_DISABLE
+#define SDIO_CLOCK_BYPASS_ENABLE            SDMMC_CLOCK_BYPASS_ENABLE
+
+#define SDIO_CLOCK_POWER_SAVE_DISABLE       SDMMC_CLOCK_POWER_SAVE_DISABLE
+#define SDIO_CLOCK_POWER_SAVE_ENABLE        SDMMC_CLOCK_POWER_SAVE_ENABLE
+
+#define SDIO_BUS_WIDE_1B                    SDMMC_BUS_WIDE_1B
+#define SDIO_BUS_WIDE_4B                    SDMMC_BUS_WIDE_4B
+#define SDIO_BUS_WIDE_8B                    SDMMC_BUS_WIDE_8B
+
+#define SDIO_HARDWARE_FLOW_CONTROL_DISABLE  SDMMC_HARDWARE_FLOW_CONTROL_DISABLE
+#define SDIO_HARDWARE_FLOW_CONTROL_ENABLE   SDMMC_HARDWARE_FLOW_CONTROL_ENABLE
+
+#define SDIO_TRANSFER_CLK_DIV               SDMMC_TRANSFER_CLK_DIV
+
+#endif
+
+
 static SD_HandleTypeDef sd_handle;
 
 void sdcard_init(void) {