diff --git a/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.c b/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.c
index 550db6f3b..34ce3017a 100644
--- a/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.c
+++ b/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.c
@@ -50,16 +50,19 @@
 /* Module exported functions.                                                */
 /*===========================================================================*/
 
-void spi_error_cb(SPIDriver *spip);
+/* Making sure mcuconf.h setup is as expected.*/
+#if STM32_PCLK1 != 85000000
+#error "unexpected PCLK1 frequency"
+#endif
 
 /*
- * High speed SPI configuration (21.25MHz, CPHA=0, CPOL=0, MSb first).
+ * High speed SPI configuration (PCLK1/4=21.25MHz, CPHA=0, CPOL=0, MSb first).
  */
 const SPIConfig hs_spicfg = {
   .circular         = false,
   .slave            = false,
   .data_cb          = NULL,
-  .error_cb         = spi_error_cb,
+  .error_cb         = NULL,
   .ssport           = GPIOB,
   .sspad            = 12U,
   .cr1              = SPI_CR1_BR_0,
@@ -67,16 +70,16 @@ const SPIConfig hs_spicfg = {
 };
 
 /*
- * Low speed SPI configuration (664,062kHz, CPHA=0, CPOL=0, MSb first).
+ * Low speed SPI configuration (PCLK1/32=265.6250kHz, CPHA=0, CPOL=0, MSb first).
  */
 const SPIConfig ls_spicfg = {
   .circular         = false,
   .slave            = false,
   .data_cb          = NULL,
-  .error_cb         = spi_error_cb,
+  .error_cb         = NULL,
   .ssport           = GPIOB,
   .sspad            = 12U,
-  .cr1              = SPI_CR1_BR_2 | SPI_CR1_BR_1,
+  .cr1              = SPI_CR1_BR_2,
   .cr2              = SPI_CR2_DS_2 | SPI_CR2_DS_1 | SPI_CR2_DS_0
 };
 
diff --git a/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.h b/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.h
index f198ef6a9..97eede3b0 100644
--- a/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.h
+++ b/demos/STM32/RT-VFS-FATFS/cfg/stm32g474re_nucleo64/portab.h
@@ -37,6 +37,7 @@
 #define PORTAB_BUTTON_PRESSED       PAL_HIGH
 
 #define PORTAB_SD1                  LPSD1
+#define PORTAB_SPI1                 SPID2
 
 /*===========================================================================*/
 /* Module pre-compile time settings.                                         */
@@ -58,6 +59,9 @@
 /* External declarations.                                                    */
 /*===========================================================================*/
 
+extern const SPIConfig hs_spicfg;
+extern const SPIConfig ls_spicfg;
+
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/demos/STM32/RT-VFS-FATFS/main.c b/demos/STM32/RT-VFS-FATFS/main.c
index ca76ede37..ec08f9298 100644
--- a/demos/STM32/RT-VFS-FATFS/main.c
+++ b/demos/STM32/RT-VFS-FATFS/main.c
@@ -153,6 +153,9 @@ static ShellConfig shell_cfg1 = {
 
 #if !HAL_USE_SDC
 mmc_spi_driver_t MMCD1;
+
+/* MMC/SD over SPI driver configuration.*/
+static MMCConfig mmccfg = {&SPID2, &ls_spicfg, &hs_spicfg};
 #endif
 
 /*
@@ -278,7 +281,8 @@ int main(void) {
   /* Activates the card insertion monitor.*/
   tmr_init(&PORTAB_SDCD1);
 #else
-  /* TODO MMC_SPI */
+  mmcObjectInit(&MMCD1);
+  mmcStart(&MMCD1, &mmccfg);
 
   /* Activates the card insertion monitor.*/
   tmr_init(&MMCD1);