diff --git a/boards/ST_STM32L_DISCOVERY/board.h b/boards/ST_STM32L_DISCOVERY/board.h
index d95480c15..845113f57 100644
--- a/boards/ST_STM32L_DISCOVERY/board.h
+++ b/boards/ST_STM32L_DISCOVERY/board.h
@@ -105,8 +105,8 @@
                                        PIN_PUDR_FLOATING(14) |              \
                                        PIN_PUDR_FLOATING(15)))
 #define VAL_GPIOA_ODR               0xFFFFFFFF
-#define VAL_GPIOA_AFRL				0x00000000
-#define VAL_GPIOA_AFRH				0x00000000
+#define VAL_GPIOA_AFRL              0x00000000
+#define VAL_GPIOA_AFRH              0x00000000
 
 /*
  * Port B setup.
@@ -127,8 +127,8 @@
                                        PIN_PUDR_FLOATING(GPIOB_LED4) |      \
                                        PIN_PUDR_FLOATING(GPIOB_LED3)))
 #define VAL_GPIOB_ODR               0xFFFFFF3F
-#define VAL_GPIOB_AFRL				0x00000000
-#define VAL_GPIOB_AFRH				0x00000000
+#define VAL_GPIOB_AFRL              0x00000000
+#define VAL_GPIOB_AFRH              0x00000000
 
 /*
  * Port C setup.
@@ -142,8 +142,8 @@
 #define VAL_GPIOC_PUPDR             (~(PIN_PUDR_FLOATING(15) |              \
                                        PIN_PUDR_FLOATING(14)))
 #define VAL_GPIOC_ODR               0xFFFFFFFF
-#define VAL_GPIOC_AFRL				0x00000000
-#define VAL_GPIOC_AFRH				0x00000000
+#define VAL_GPIOC_AFRL              0x00000000
+#define VAL_GPIOC_AFRH              0x00000000
 
 /*
  * Port D setup.
@@ -154,8 +154,8 @@
 #define VAL_GPIOD_OSPEEDR           0xFFFFFFFF
 #define VAL_GPIOD_PUPDR             0xFFFFFFFF
 #define VAL_GPIOD_ODR               0xFFFFFFFF
-#define VAL_GPIOD_AFRL				0x00000000
-#define VAL_GPIOD_AFRH				0x00000000
+#define VAL_GPIOD_AFRL              0x00000000
+#define VAL_GPIOD_AFRH              0x00000000
 
 /*
  * Port E setup.
@@ -166,8 +166,8 @@
 #define VAL_GPIOE_OSPEEDR           0xFFFFFFFF
 #define VAL_GPIOE_PUPDR             0xFFFFFFFF
 #define VAL_GPIOE_ODR               0xFFFFFFFF
-#define VAL_GPIOE_AFRL				0x00000000
-#define VAL_GPIOE_AFRH				0x00000000
+#define VAL_GPIOE_AFRL              0x00000000
+#define VAL_GPIOE_AFRH              0x00000000
 
 /*
  * Port H setup.
@@ -178,8 +178,8 @@
 #define VAL_GPIOH_OSPEEDR           0xFFFFFFFF
 #define VAL_GPIOH_PUPDR             0xFFFFFFFF
 #define VAL_GPIOH_ODR               0xFFFFFFFF
-#define VAL_GPIOH_AFRL				0x00000000
-#define VAL_GPIOH_AFRH				0x00000000
+#define VAL_GPIOH_AFRL              0x00000000
+#define VAL_GPIOH_AFRH              0x00000000
 
 #if !defined(_FROM_ASM_)
 #ifdef __cplusplus
diff --git a/demos/ARMCM3-STM32L152-DISCOVERY/halconf.h b/demos/ARMCM3-STM32L152-DISCOVERY/halconf.h
index 2a5f1806e..b9bee3656 100644
--- a/demos/ARMCM3-STM32L152-DISCOVERY/halconf.h
+++ b/demos/ARMCM3-STM32L152-DISCOVERY/halconf.h
@@ -115,14 +115,14 @@
  * @brief   Enables the SERIAL subsystem.
  */
 #if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
-#define HAL_USE_SERIAL              FALSE
+#define HAL_USE_SERIAL              TRUE
 #endif
 
 /**
  * @brief   Enables the SERIAL over USB subsystem.
  */
 #if !defined(HAL_USE_SERIAL_USB) || defined(__DOXYGEN__)
-#define HAL_USE_SERIAL_USB          TRUE
+#define HAL_USE_SERIAL_USB          FALSE
 #endif
 
 /**
@@ -143,7 +143,7 @@
  * @brief   Enables the USB subsystem.
  */
 #if !defined(HAL_USE_USB) || defined(__DOXYGEN__)
-#define HAL_USE_USB                 TRUE
+#define HAL_USE_USB                 FALSE
 #endif
 
 /*===========================================================================*/
diff --git a/demos/ARMCM3-STM32L152-DISCOVERY/iar/ch.ewp b/demos/ARMCM3-STM32L152-DISCOVERY/iar/ch.ewp
index 88946580b..d84ff7beb 100644
--- a/demos/ARMCM3-STM32L152-DISCOVERY/iar/ch.ewp
+++ b/demos/ARMCM3-STM32L152-DISCOVERY/iar/ch.ewp
@@ -295,9 +295,14 @@
           <name>CCIncludePath2</name>
           <state>$PROJ_DIR$\..\</state>
           <state>$PROJ_DIR$\..\..\..\os\kernel\include</state>
+          <state>$PROJ_DIR$\..\..\..\os\ports\common\ARMCMx\CMSIS\include</state>
           <state>$PROJ_DIR$\..\..\..\os\ports\IAR\ARMCMx</state>
           <state>$PROJ_DIR$\..\..\..\os\ports\IAR\ARMCMx\STM32L1xx</state>
           <state>$PROJ_DIR$\..\..\..\os\hal\include</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\DMAv1</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\GPIOv2</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\USBv1</state>
           <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx</state>
           <state>$PROJ_DIR$\..\..\..\boards\ST_STM32L_DISCOVERY</state>
           <state>$PROJ_DIR$\..\..\..\test</state>
@@ -1198,9 +1203,14 @@
           <name>CCIncludePath2</name>
           <state>$PROJ_DIR$\..\</state>
           <state>$PROJ_DIR$\..\..\..\os\kernel\include</state>
+          <state>$PROJ_DIR$\..\..\..\os\ports\common\ARMCMx\CMSIS\include</state>
           <state>$PROJ_DIR$\..\..\..\os\ports\IAR\ARMCMx</state>
           <state>$PROJ_DIR$\..\..\..\os\ports\IAR\ARMCMx\STM32L1xx</state>
           <state>$PROJ_DIR$\..\..\..\os\hal\include</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\DMAv1</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\GPIOv2</state>
+          <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\USBv1</state>
           <state>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx</state>
           <state>$PROJ_DIR$\..\..\..\boards\ST_STM32L_DISCOVERY</state>
           <state>$PROJ_DIR$\..\..\..\test</state>
@@ -2028,9 +2038,6 @@
     </group>
     <group>
       <name>platform</name>
-      <file>
-        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\core_cm3.h</name>
-      </file>
       <file>
         <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\hal_lld.c</name>
       </file>
@@ -2038,16 +2045,22 @@
         <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\hal_lld.h</name>
       </file>
       <file>
-        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\pal_lld.c</name>
+        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\GPIOv2\pal_lld.c</name>
       </file>
       <file>
-        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\pal_lld.h</name>
+        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\GPIOv2\pal_lld.h</name>
       </file>
       <file>
-        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\stm32_dma.c</name>
+        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\serial_lld.c</name>
       </file>
       <file>
-        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\stm32_dma.h</name>
+        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\serial_lld.h</name>
+      </file>
+      <file>
+        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\DMAv1\stm32_dma.c</name>
+      </file>
+      <file>
+        <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32\DMAv1\stm32_dma.h</name>
       </file>
       <file>
         <name>$PROJ_DIR$\..\..\..\os\hal\platforms\STM32L1xx\stm32l1xx.h</name>
diff --git a/demos/ARMCM3-STM32L152-DISCOVERY/main.c b/demos/ARMCM3-STM32L152-DISCOVERY/main.c
index 6f0ea53a0..3eaddc5fc 100644
--- a/demos/ARMCM3-STM32L152-DISCOVERY/main.c
+++ b/demos/ARMCM3-STM32L152-DISCOVERY/main.c
@@ -61,7 +61,7 @@ int main(void) {
   /*
    * Activates the serial driver 1 using the driver default configuration.
    */
-//  sdStart(&SD1, NULL);
+  sdStart(&SD1, NULL);
 
   /*
    * If the user button is pressed after the reset then the test suite is