diff --git a/targets/TARGET_STM/TARGET_STM32L1/TARGET_MOTE_L152RC/device/system_stm32l1xx.c b/targets/TARGET_STM/TARGET_STM32L1/TARGET_MOTE_L152RC/device/system_stm32l1xx.c
index 5f8ec42e0e..c5170029ec 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/TARGET_MOTE_L152RC/device/system_stm32l1xx.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/TARGET_MOTE_L152RC/device/system_stm32l1xx.c
@@ -529,7 +529,7 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE;
   if (bypass == 0)
   {
     RCC_OscInitStruct.HSEState          = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
@@ -586,7 +586,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSI oscillator and activate PLL with HSI as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
   RCC_OscInitStruct.HSEState            = RCC_HSE_OFF;
   RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
   // SYSCLK = 32 MHz ((16 MHz * 4) / 2)
diff --git a/targets/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/device/system_stm32l1xx.c b/targets/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/device/system_stm32l1xx.c
index 0864d2e88a..2ecd98c9f7 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/device/system_stm32l1xx.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/TARGET_NUCLEO_L152RE/device/system_stm32l1xx.c
@@ -526,7 +526,7 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE;
   if (bypass == 0)
   {
     RCC_OscInitStruct.HSEState          = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
@@ -583,7 +583,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSI oscillator and activate PLL with HSI as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
   RCC_OscInitStruct.HSEState            = RCC_HSE_OFF;
   RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
   RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
diff --git a/targets/TARGET_STM/TARGET_STM32L1/TARGET_NZ32_SC151/device/system_stm32l1xx.c b/targets/TARGET_STM/TARGET_STM32L1/TARGET_NZ32_SC151/device/system_stm32l1xx.c
index 6f378178a8..04473e0ea4 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/TARGET_NZ32_SC151/device/system_stm32l1xx.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/TARGET_NZ32_SC151/device/system_stm32l1xx.c
@@ -97,10 +97,7 @@
 /** @addtogroup STM32L1xx_System_Private_Defines
   * @{
   */
-#if !defined  (HSE_VALUE) 
-  #define HSE_VALUE    ((uint32_t)16000000) /*!< Default value of the External oscillator in Hz.
-                                                This value can be provided and adapted by the user application. */
-#endif /* HSE_VALUE */
+#define HSE_VALUE    ((uint32_t)16000000) /*!< NZ32-SC151 has a 16MHz External crystal */
 
 #if !defined  (HSI_VALUE)
   #define HSI_VALUE    ((uint32_t)16000000) /*!< Default value of the Internal oscillator in Hz.
@@ -526,7 +523,7 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE;
   if (bypass == 0)
   {
     RCC_OscInitStruct.HSEState          = RCC_HSE_ON; /* External 16 MHz xtal on OSC_IN/OSC_OUT */
@@ -584,7 +581,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSI oscillator and activate PLL with HSI as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
   RCC_OscInitStruct.HSEState            = RCC_HSE_OFF;
   RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
   // SYSCLK = 32 MHz ((16 MHz * 4) / 2)
diff --git a/targets/TARGET_STM/TARGET_STM32L1/TARGET_XDOT_L151CC/device/system_stm32l1xx.c b/targets/TARGET_STM/TARGET_STM32L1/TARGET_XDOT_L151CC/device/system_stm32l1xx.c
index cfe408b714..31d965cd4a 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/TARGET_XDOT_L151CC/device/system_stm32l1xx.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/TARGET_XDOT_L151CC/device/system_stm32l1xx.c
@@ -98,10 +98,7 @@
 /** @addtogroup STM32L1xx_System_Private_Defines
   * @{
   */
-#if !defined  (HSE_VALUE) 
-  #define HSE_VALUE    ((uint32_t)24000000) /*!< Default value of the External oscillator in Hz.
-                                                This value can be provided and adapted by the user application. */
-#endif /* HSE_VALUE */
+#define HSE_VALUE    ((uint32_t)24000000) /*!< XDOT-L151CC has a 24MHz External crystal */
 
 #if !defined  (HSI_VALUE)
   #define HSI_VALUE    ((uint32_t)16000000) /*!< Default value of the Internal oscillator in Hz.
@@ -527,7 +524,7 @@ uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSE;
   if (bypass == 0)
   {
     RCC_OscInitStruct.HSEState          = RCC_HSE_ON; /* External 24 MHz xtal on OSC_IN/OSC_OUT */
@@ -585,7 +582,7 @@ uint8_t SetSysClock_PLL_HSI(void)
   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
   
   /* Enable HSI oscillator and activate PLL with HSI as source */
-  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_HSI;
   RCC_OscInitStruct.HSEState            = RCC_HSE_OFF;
   RCC_OscInitStruct.HSIState            = RCC_HSI_ON;
   // SYSCLK = 32 MHz ((16 MHz * 4) / 2)
diff --git a/targets/TARGET_STM/TARGET_STM32L1/analogin_api.c b/targets/TARGET_STM/TARGET_STM32L1/analogin_api.c
index 53a3ac06c0..3d01fdf90c 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/analogin_api.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/analogin_api.c
@@ -70,6 +70,7 @@ void analogin_init(analogin_t *obj, PinName pin)
         RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
         RCC_OscInitStruct.HSIState       = RCC_HSI_ON;
         RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE;
+        RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
         HAL_RCC_OscConfig(&RCC_OscInitStruct);
 
         AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
diff --git a/targets/TARGET_STM/TARGET_STM32L1/device/stm32l1xx_ll_utils.c b/targets/TARGET_STM/TARGET_STM32L1/device/stm32l1xx_ll_utils.c
index 30d84fb828..d05013f10b 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/device/stm32l1xx_ll_utils.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/device/stm32l1xx_ll_utils.c
@@ -39,11 +39,6 @@
 #include "stm32l1xx_ll_utils.h"
 #include "stm32l1xx_ll_system.h"
 #include "stm32l1xx_ll_pwr.h"
-#ifdef  USE_FULL_ASSERT
-#include "stm32_assert.h"
-#else
-#define assert_param(expr) ((void)0U)
-#endif
 
 /** @addtogroup STM32L1xx_LL_Driver
   * @{
diff --git a/targets/TARGET_STM/TARGET_STM32L1/gpio_irq_api.c b/targets/TARGET_STM/TARGET_STM32L1/gpio_irq_api.c
index cf8fed9402..c595b98ba6 100644
--- a/targets/TARGET_STM/TARGET_STM32L1/gpio_irq_api.c
+++ b/targets/TARGET_STM/TARGET_STM32L1/gpio_irq_api.c
@@ -304,7 +304,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
                 mode = STM_MODE_IT_FALLING;
                 obj->event = EDGE_FALL;
             } else { // NONE or RISE
-                mode = STM_MODE_IT_EVT_RESET;
+                mode = STM_MODE_INPUT;
                 obj->event = EDGE_NONE;
             }
         }
@@ -313,7 +313,7 @@ void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
                 mode = STM_MODE_IT_RISING;
                 obj->event = EDGE_RISE;
             } else { // NONE or FALL
-                mode = STM_MODE_IT_EVT_RESET;
+                mode = STM_MODE_INPUT;
                 obj->event = EDGE_NONE;
             }
         }