diff --git a/bsp/stm32f429-apollo/drivers/drv_sdio_sd.c b/bsp/stm32f429-apollo/drivers/drv_sdio_sd.c
index d37543e23..688cf0cb6 100644
--- a/bsp/stm32f429-apollo/drivers/drv_sdio_sd.c
+++ b/bsp/stm32f429-apollo/drivers/drv_sdio_sd.c
@@ -21,7 +21,7 @@ rt_uint8_t SD_Init(void)
     SDCARD_Handler.Init.ClockPowerSave=SDIO_CLOCK_POWER_SAVE_DISABLE;    //空闲时不关闭时钟电源
     SDCARD_Handler.Init.BusWide=SDIO_BUS_WIDE_1B;                        //1位数据线
     SDCARD_Handler.Init.HardwareFlowControl=SDIO_HARDWARE_FLOW_CONTROL_DISABLE;//关闭硬件流控
-    SDCARD_Handler.Init.ClockDiv=SDIO_TRANSFER_CLK_DIV;            //SD传输时钟频率最大25MHZ
+    SDCARD_Handler.Init.ClockDiv=SDIO_INIT_CLK_DIV;                 //初始化时钟为400KHZ
     
     SD_Error=HAL_SD_Init(&SDCARD_Handler,&SDCardInfo);
     if(SD_Error!=SD_OK) return 1;
diff --git a/bsp/stm32f429-apollo/drivers/drv_spi.c b/bsp/stm32f429-apollo/drivers/drv_spi.c
index e7b547cce..a82454d90 100644
--- a/bsp/stm32f429-apollo/drivers/drv_spi.c
+++ b/bsp/stm32f429-apollo/drivers/drv_spi.c
@@ -526,6 +526,7 @@ struct stm32f4_spi stm32f4_spi5 =
     /* .spi_handle = */{
         /* .Instance = */ SPI5,
     },
+#ifdef SPI_USE_DMA
     /* .hdma_rx = */ {   
         DMA2_Stream3,
         DMA_CHANNEL_2,
@@ -537,6 +538,7 @@ struct stm32f4_spi stm32f4_spi5 =
         DMA_CHANNEL_2,
     },
     /* .hdma_tx_irq = */ DMA2_Stream4_IRQn,
+#endif /* SPI_USE_DMA */
 };
 
 static struct rt_spi_bus spi5_bus;
@@ -703,6 +705,7 @@ rt_err_t stm32_spi_bus_register(SPI_TypeDef * SPI,
         return RT_ENOSYS;
     }
     
+#ifdef SPI_USE_DMA
     /* Configure the DMA handler for Transmission process */
     p_spi_bus->hdma_tx.Init.Direction           = DMA_MEMORY_TO_PERIPH;
     p_spi_bus->hdma_tx.Init.PeriphInc           = DMA_PINC_DISABLE;
@@ -727,6 +730,7 @@ rt_err_t stm32_spi_bus_register(SPI_TypeDef * SPI,
     p_spi_bus->hdma_rx.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
     p_spi_bus->hdma_rx.Init.MemBurst            = DMA_MBURST_INC4;
     p_spi_bus->hdma_rx.Init.PeriphBurst         = DMA_PBURST_INC4;
+#endif /* SPI_USE_DMA */
 
     spi_bus->parent.user_data = &stm32f4_spi5;
     
diff --git a/bsp/stm32f429-apollo/drivers/drv_spi.h b/bsp/stm32f429-apollo/drivers/drv_spi.h
index 8967b4b98..8c74fdb62 100644
--- a/bsp/stm32f429-apollo/drivers/drv_spi.h
+++ b/bsp/stm32f429-apollo/drivers/drv_spi.h
@@ -20,7 +20,7 @@
 
 #include "stm32f4xx_hal.h"
 
-#define SPI_USE_DMA
+//#define SPI_USE_DMA
 
 struct stm32f4_spi
 {