diff --git a/platform_config.h b/platform_config.h
--- a/platform_config.h
+++ b/platform_config.h
@@ -30,19 +30,16 @@
 #ifndef __PLATFORM_CONFIG_H
 #define __PLATFORM_CONFIG_H
 
-#define STM32L1XX_MD
-
 /* Includes ------------------------------------------------------------------*/
 #if defined(STM32L1XX_MD) || defined(STM32L1XX_HD)|| defined(STM32L1XX_MD_PLUS)
  #include "stm32l1xx.h"
- #include "evalcompat.h"
-// #if defined (USE_STM32L152_EVAL)
-//  #include "stm32l152_eval.h"
-// #elif defined (USE_STM32L152D_EVAL)
-//  #include "stm32l152d_eval.h"
-// #else
-//  #error "Missing define: USE_STM32L152_EVAL or USE_STM32L152D_EVAL"
-// #endif /* USE_STM32L152_EVAL */
+ #if defined (USE_STM32L152_EVAL)
+  #include "stm32l152_eval.h"
+ #elif defined (USE_STM32L152D_EVAL)
+  #include "stm32l152d_eval.h"
+ #else
+  #error "Missing define: USE_STM32L152_EVAL or USE_STM32L152D_EVAL"
+ #endif /* USE_STM32L152_EVAL */
 #elif defined (STM32F10X_MD) || defined (STM32F10X_HD) || defined (STM32F10X_XL)
  #include "stm32f10x.h"
  #if defined (USE_STM3210B_EVAL)
@@ -64,15 +61,16 @@
 /* Exported constants --------------------------------------------------------*/
 /* Uncomment the line corresponding to the STMicroelectronics evaluation board
    used to run the example */
-#if !defined (USE_STM3210B_EVAL) &&  !defined (USE_STM3210E_EVAL)  && !defined (USE_STM32L152_EVAL) &&  !defined (USE_STM32L152D_EVAL) &&  !defined (USE_STM32373C_EVAL) && !defined (USE_STM32303C_EVAL)
+#if !defined (USE_STM3210B_EVAL) &&  !defined (USE_STM3210E_EVAL)  && !defined (USE_STM32L152_EVAL) &&  !defined (USE_STM32L152D_EVAL) &&  !defined (USE_STM32373C_EVAL) &&  !defined (USE_STM32303C_EVAL)
 //#define USE_STM3210B_EVAL
 //#define USE_STM3210E_EVAL
-#define USE_STM32L152_EVAL
+//#define USE_STM32L152_EVAL
 //#define USE_STM32L152D_EVAL
 //#define (USE_STM32373C_EVAL)
-//#define USE_STM32303C_EVAL
+#define (USE_STM32303C_EVAL)
 #endif
 
+
 /*Unique Devices IDs register set*/
 
 #if defined(STM32L1XX_MD) || defined(STM32L1XX_HD) || defined(STM32L1XX_MD_PLUS) 
@@ -95,10 +93,59 @@
 
 #endif
 
+
 /* Define the STM32F10x hardware depending on the used evaluation board */
-#define USB_DISCONNECT                      GPIOA  
-#define USB_DISCONNECT_PIN                  GPIO_Pin_10
-#define RCC_APB2Periph_GPIO_DISCONNECT      RCC_APB2Periph_GPIOA
+#ifdef USE_STM3210B_EVAL
+  #define USB_DISCONNECT                      GPIOD  
+  #define USB_DISCONNECT_PIN                  GPIO_Pin_9
+  #define RCC_APB2Periph_GPIO_DISCONNECT      RCC_APB2Periph_GPIOD
+
+#elif defined (USE_STM3210E_EVAL)
+  #define USB_DISCONNECT                      GPIOB  
+  #define USB_DISCONNECT_PIN                  GPIO_Pin_14
+  #define RCC_APB2Periph_GPIO_DISCONNECT      RCC_APB2Periph_GPIOB
+ 
+#elif defined (USE_STM32L152_EVAL) || defined (USE_STM32L152D_EVAL)
+ /* 
+   For STM32L15xx devices it is possible to use the internal USB pullup
+   controlled by register SYSCFG_PMC (refer to RM0038 reference manual for
+   more details).
+   It is also possible to use external pullup (and disable the internal pullup)
+   by setting the define USB_USE_EXTERNAL_PULLUP in file platform_config.h
+   and configuring the right pin to be used for the external pull up configuration.
+   To have more details on how to use an external pull up, please refer to 
+   STM3210E-EVAL evaluation board manuals.
+   */
+ /* Uncomment the following define to use an external pull up instead of the 
+    integrated STM32L15xx internal pull up. In this case make sure to set up
+    correctly the external required hardware and the GPIO defines below.*/
+/* #define USB_USE_EXTERNAL_PULLUP */
+
+ #if !defined(USB_USE_EXTERNAL_PULLUP)
+  #define STM32L15_USB_CONNECT                SYSCFG_USBPuCmd(ENABLE)
+  #define STM32L15_USB_DISCONNECT             SYSCFG_USBPuCmd(DISABLE)
+
+ #elif defined(USB_USE_EXTERNAL_PULLUP)
+  /* PA0 is chosen just as illustrating example, you should modify the defines
+    below according to your hardware configuration. */ 
+  #define USB_DISCONNECT                      GPIOA
+  #define USB_DISCONNECT_PIN                  GPIO_Pin_0
+  #define RCC_AHBPeriph_GPIO_DISCONNECT       RCC_AHBPeriph_GPIOA
+  #define STM32L15_USB_CONNECT                GPIO_ResetBits(USB_DISCONNECT, USB_DISCONNECT_PIN)
+  #define STM32L15_USB_DISCONNECT             GPIO_SetBits(USB_DISCONNECT, USB_DISCONNECT_PIN)
+ #endif /* USB_USE_EXTERNAL_PULLUP */
+
+#elif defined (USE_STM32373C_EVAL)
+  #define USB_DISCONNECT                      GPIOC  
+  #define USB_DISCONNECT_PIN                  GPIO_Pin_5
+  #define RCC_AHBPeriph_GPIO_DISCONNECT       RCC_AHBPeriph_GPIOC
+
+#elif defined (USE_STM32303C_EVAL)
+  #define USB_DISCONNECT                      GPIOB  
+  #define USB_DISCONNECT_PIN                  GPIO_Pin_8
+
+  #define RCC_AHBPeriph_GPIO_DISCONNECT       RCC_AHBPeriph_GPIOB
+#endif /* USE_STM3210B_EVAL */
 
 /* Exported macro ------------------------------------------------------------*/
 /* Exported functions ------------------------------------------------------- */