diff --git a/os/hal/include/hal.h b/os/hal/include/hal.h
index dcfa822b4..34ed2f08c 100644
--- a/os/hal/include/hal.h
+++ b/os/hal/include/hal.h
@@ -30,6 +30,8 @@
 #include "halconf.h"
 #include "board.h"
 
+#include "hal_lld.h"
+
 #include "pal.h"
 #include "adc.h"
 #include "can.h"
diff --git a/os/hal/platforms/STM32/adc_lld.c b/os/hal/platforms/STM32/adc_lld.c
index b31579b90..c2f2e91f9 100644
--- a/os/hal/platforms/STM32/adc_lld.c
+++ b/os/hal/platforms/STM32/adc_lld.c
@@ -26,8 +26,6 @@
 
 #include "ch.h"
 #include "hal.h"
-#include "stm32_dma.h"
-#include "nvic.h"
 
 #if CH_HAL_USE_ADC
 
diff --git a/os/hal/platforms/STM32/hal_lld.c b/os/hal/platforms/STM32/hal_lld.c
new file mode 100644
index 000000000..1fa5a2aca
--- /dev/null
+++ b/os/hal/platforms/STM32/hal_lld.c
@@ -0,0 +1,128 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file templates/hal_lld.c
+ * @brief HAL Driver subsystem low level driver source template
+ * @addtogroup HAL_LLD
+ * @{
+ */
+
+#include <ch.h>
+#include <hal.h>
+
+#define AIRCR_VECTKEY           0x05FA0000
+
+/*===========================================================================*/
+/* Low Level Driver exported variables.                                      */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local variables.                                         */
+/*===========================================================================*/
+
+/*
+ * Digital I/O ports static configuration as defined in @p board.h.
+ */
+const STM32GPIOConfig pal_default_config =
+{
+  {VAL_GPIOAODR, VAL_GPIOACRL, VAL_GPIOACRH},
+  {VAL_GPIOBODR, VAL_GPIOBCRL, VAL_GPIOBCRH},
+  {VAL_GPIOCODR, VAL_GPIOCCRL, VAL_GPIOCCRH},
+  {VAL_GPIODODR, VAL_GPIODCRL, VAL_GPIODCRH},
+#if !defined(STM32F10X_LD)
+  {VAL_GPIOEODR, VAL_GPIOECRL, VAL_GPIOECRH},
+#endif
+#if defined(STM32F10X_HD)
+  {VAL_GPIOFODR, VAL_GPIOFCRL, VAL_GPIOFCRH},
+  {VAL_GPIOGODR, VAL_GPIOGCRL, VAL_GPIOGCRH},
+#endif
+};
+
+/*===========================================================================*/
+/* Low Level Driver local functions.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver interrupt handlers.                                      */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver exported functions.                                      */
+/*===========================================================================*/
+
+/**
+ * @brief Low level HAL driver initialization.
+ */
+void hal_lld_init(void) {
+
+#if CH_HAL_USE_ADC || CH_HAL_USE_SPI
+  dmaInit();
+#endif
+}
+
+/**
+ * @brief STM32 clocks and PLL initialization.
+ * @note All the involved constants come from the file @p board.h.
+ */
+void stm32_clock_init(void) {
+
+  /* HSI setup.*/
+  RCC->CR = RCC_CR_HSITRIM_RESET_BITS | RCC_CR_HSION;
+  while (!(RCC->CR & RCC_CR_HSIRDY))
+    ;                           /* Waits until HSI stable.                  */
+  /* HSE setup.*/
+  RCC->CR |= RCC_CR_HSEON;
+  while (!(RCC->CR & RCC_CR_HSERDY))
+    ;                           /* Waits until HSE stable.                  */
+  /* PLL setup.*/
+  RCC->CFGR = RCC_CFGR_PLLSRC_HSE_BITS | PLLPREBITS | PLLMULBITS;
+  RCC->CR |= RCC_CR_PLLON;
+  while (!(RCC->CR & RCC_CR_PLLRDY))
+    ;                           /* Waits until PLL stable.                  */
+  /* Clock sources.*/
+  RCC->CFGR |= RCC_CFGR_HPRE_DIV1   | RCC_CFGR_PPRE1_DIV2  |
+               RCC_CFGR_PPRE2_DIV2  | RCC_CFGR_ADCPRE_DIV8 |
+               RCC_CFGR_MCO_NOCLOCK | USBPREBITS;
+
+  /* Flash setup and final clock selection.   */
+  FLASH->ACR = FLASHBITS;       /* Flash wait states depending on clock.    */
+  RCC->CFGR |= RCC_CFGR_SW_PLL; /* Switches the PLL clock ON.               */
+  while ((RCC->CFGR & RCC_CFGR_SW) != RCC_CFGR_SW_PLL)
+    ;
+}
+
+/**
+ * @brief STM32 NVIC/SCB/SYSTICK initialization.
+ * @note All the involved constants come from the file @p board.h.
+ */
+void stm32_nvic_init(void) {
+
+  /* Note: PRIGROUP 4:0 (4:4).*/
+  SCB->AIRCR = AIRCR_VECTKEY | SCB_AIRCR_PRIGROUP_0 | SCB_AIRCR_PRIGROUP_1;
+  NVICSetSystemHandlerPriority(HANDLER_SVCALL, PRIORITY_SVCALL);
+  NVICSetSystemHandlerPriority(HANDLER_SYSTICK, PRIORITY_SYSTICK);
+  NVICSetSystemHandlerPriority(HANDLER_PENDSV, PRIORITY_PENDSV);
+
+  SysTick->LOAD = SYSCLK / (8000000 / CH_FREQUENCY) - 1;
+  SysTick->VAL = 0;
+  SysTick->CTRL = SysTick_CTRL_ENABLE | SysTick_CTRL_TICKINT;
+}
+
+/** @} */
diff --git a/os/hal/platforms/STM32/hal_lld.h b/os/hal/platforms/STM32/hal_lld.h
new file mode 100644
index 000000000..7be941ca2
--- /dev/null
+++ b/os/hal/platforms/STM32/hal_lld.h
@@ -0,0 +1,61 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file templates/hal_lld.h
+ * @brief HAL subsystem low level driver header template
+ * @addtogroup HAL_LLD
+ * @{
+ */
+
+#ifndef _HAL_LLD_H_
+#define _HAL_LLD_H_
+
+#include "nvic.h"
+#include "stm32_dma.h"
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver constants.                                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void hal_lld_init(void);
+  void stm32_clock_init(void);
+  void stm32_nvic_init(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HAL_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/STM32/platform.mk b/os/hal/platforms/STM32/platform.mk
index 6e78d5dd6..e31325ccc 100644
--- a/os/hal/platforms/STM32/platform.mk
+++ b/os/hal/platforms/STM32/platform.mk
@@ -1,10 +1,11 @@
 # List of all the STM32 platform files.
-PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32/stm32_dma.c \
+PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32/hal_lld.c \
               ${CHIBIOS}/os/hal/platforms/STM32/adc_lld.c \
               ${CHIBIOS}/os/hal/platforms/STM32/can_lld.c \
               ${CHIBIOS}/os/hal/platforms/STM32/pal_lld.c \
               ${CHIBIOS}/os/hal/platforms/STM32/serial_lld.c \
-              ${CHIBIOS}/os/hal/platforms/STM32/spi_lld.c
+              ${CHIBIOS}/os/hal/platforms/STM32/spi_lld.c \
+              ${CHIBIOS}/os/hal/platforms/STM32/stm32_dma.c
 
 # Required include directories
 PLATFORMINC = ${CHIBIOS}/os/hal/platforms/STM32
diff --git a/os/hal/platforms/STM32/serial_lld.c b/os/hal/platforms/STM32/serial_lld.c
index 2d9407f90..5337c4dfa 100644
--- a/os/hal/platforms/STM32/serial_lld.c
+++ b/os/hal/platforms/STM32/serial_lld.c
@@ -26,7 +26,6 @@
 
 #include "ch.h"
 #include "hal.h"
-#include "nvic.h"
 
 #if CH_HAL_USE_SERIAL
 
diff --git a/os/hal/platforms/STM32/spi_lld.c b/os/hal/platforms/STM32/spi_lld.c
index 1d73646a0..0adbe4d8a 100644
--- a/os/hal/platforms/STM32/spi_lld.c
+++ b/os/hal/platforms/STM32/spi_lld.c
@@ -26,8 +26,6 @@
 
 #include "ch.h"
 #include "hal.h"
-#include "nvic.h"
-#include "stm32_dma.h"
 
 #if CH_HAL_USE_SPI
 
diff --git a/os/hal/platforms/STM32/stm32_dma.c b/os/hal/platforms/STM32/stm32_dma.c
index da036d159..e7574b75d 100644
--- a/os/hal/platforms/STM32/stm32_dma.c
+++ b/os/hal/platforms/STM32/stm32_dma.c
@@ -25,13 +25,7 @@
  */
 
 #include "ch.h"
-#include "stm32_dma.h"
-
-#undef FALSE
-#undef TRUE
-#include <stm32f10x.h>
-#define FALSE 0
-#define TRUE (!FALSE)
+#include "hal.h"
 
 static cnt_t dmacnt1;
 #if defined(STM32F10X_HD) || defined (STM32F10X_CL)
diff --git a/os/hal/src/hal.c b/os/hal/src/hal.c
index 1aec1a478..b64ba49af 100644
--- a/os/hal/src/hal.c
+++ b/os/hal/src/hal.c
@@ -27,8 +27,13 @@
 #include "ch.h"
 #include "hal.h"
 
+/**
+ * @brief HAL initialization.
+ */
 void halInit(void) {
 
+  hal_lld_init();
+
 #if CH_HAL_USE_PAL
   palInit(&pal_default_config);
 #endif
diff --git a/os/hal/templates/hal_lld.c b/os/hal/templates/hal_lld.c
new file mode 100644
index 000000000..0d2d46dcc
--- /dev/null
+++ b/os/hal/templates/hal_lld.c
@@ -0,0 +1,57 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file templates/hal_lld.c
+ * @brief HAL Driver subsystem low level driver source template
+ * @addtogroup HAL_LLD
+ * @{
+ */
+
+#include <ch.h>
+#include <hal.h>
+
+/*===========================================================================*/
+/* Low Level Driver exported variables.                                      */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local variables.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local functions.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver interrupt handlers.                                      */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver exported functions.                                      */
+/*===========================================================================*/
+
+/**
+ * @brief Low level HAL driver initialization.
+ */
+void hal_lld_init(void) {
+
+}
+
+/** @} */
diff --git a/os/hal/templates/hal_lld.h b/os/hal/templates/hal_lld.h
new file mode 100644
index 000000000..b401e4217
--- /dev/null
+++ b/os/hal/templates/hal_lld.h
@@ -0,0 +1,56 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file templates/hal_lld.h
+ * @brief HAL subsystem low level driver header template
+ * @addtogroup HAL_LLD
+ * @{
+ */
+
+#ifndef _HAL_LLD_H_
+#define _HAL_LLD_H_
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver constants.                                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void hal_lld_init(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HAL_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/templates/meta/driver.c b/os/hal/templates/meta/driver.c
new file mode 100644
index 000000000..9bf785ed2
--- /dev/null
+++ b/os/hal/templates/meta/driver.c
@@ -0,0 +1,87 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file XXX.c
+ * @brief XXX Driver code.
+ * @addtogroup XXX
+ * @{
+ */
+
+#include <ch.h>
+#include <xxx.h>
+
+/**
+ * @brief XXX Driver initialization.
+ */
+void xxxInit(void) {
+
+  xxx_lld_init();
+}
+
+/**
+ * @brief Initializes the standard part of a @p XXXDriver structure.
+ *
+ * @param[in] xxxp      pointer to the @p XXXDriver object
+ */
+void xxxObjectInit(XXXDriver *xxxp) {
+
+  xxxp->xxx_state    = XXX_STOP;
+  xxxp->xxx_config   = NULL;
+}
+
+/**
+ * @brief Configures and activates the XXX peripheral.
+ *
+ * @param[in] xxxp      pointer to the @p XXXDriver object
+ * @param[in] config    pointer to the @p XXXConfig object
+ */
+void xxxStart(XXXDriver *xxxp, const XXXConfig *config) {
+
+  chDbgCheck((xxxp != NULL) && (config != NULL), "xxxStart");
+
+  chSysLock();
+  chDbgAssert((xxxp->xxx_state == XXX_STOP) || (xxxp->xxx_state == XXX_READY),
+              "xxxStart(), #1",
+              "invalid state");
+  xxxp->xxx_config = config;
+  xxx_lld_start(xxxp);
+  xxxp->xxx_state = XXX_READY;
+  chSysUnlock();
+}
+
+/**
+ * @brief Deactivates the XXX peripheral.
+ *
+ * @param[in] xxxp      pointer to the @p XXXDriver object
+ */
+void xxxStop(XXXDriver *xxxp) {
+
+  chDbgCheck(xxxp != NULL, "xxxStop");
+
+  chSysLock();
+  chDbgAssert((xxxp->xxx_state == XXX_STOP) || (xxxp->xxx_state == XXX_READY),
+              "xxxStop(), #1",
+              "invalid state");
+  xxx_lld_stop(xxxp);
+  xxxp->xxx_state = XXX_STOP;
+  chSysUnlock();
+}
+
+/** @} */
diff --git a/os/hal/templates/meta/driver.h b/os/hal/templates/meta/driver.h
new file mode 100644
index 000000000..675bc6689
--- /dev/null
+++ b/os/hal/templates/meta/driver.h
@@ -0,0 +1,54 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file xxx.h
+ * @brief XXX Driver macros and structures.
+ * @addtogroup XXX
+ * @{
+ */
+
+#ifndef _XXX_H_
+#define _XXX_H_
+
+/**
+ * @brief Driver state machine possible states.
+ */
+typedef enum {
+  XXX_UNINIT = 0,                           /**< @brief Not initialized.    */
+  XXX_STOP = 1,                             /**< @brief Stopped.            */
+  XXX_READY = 2,                            /**< @brief Ready.              */
+} xxxstate_t;
+
+#include "xxx_lld.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void xxxInit(void);
+  void xxxObjectInit(XXXDriver *xxxp);
+  void xxxStart(XXXDriver *xxxp, const XXXConfig *config);
+  void xxxStop(XXXDriver *xxxp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _XXX_H_ */
+
+/** @} */
diff --git a/os/hal/templates/meta/driver_lld.c b/os/hal/templates/meta/driver_lld.c
new file mode 100644
index 000000000..df91ed21b
--- /dev/null
+++ b/os/hal/templates/meta/driver_lld.c
@@ -0,0 +1,79 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file templates/xxx_lld.c
+ * @brief XXX Driver subsystem low level driver source template
+ * @addtogroup XXX_LLD
+ * @{
+ */
+
+#include <ch.h>
+#include <xxx.h>
+
+/*===========================================================================*/
+/* Low Level Driver exported variables.                                      */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local variables.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local functions.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver interrupt handlers.                                      */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver exported functions.                                      */
+/*===========================================================================*/
+
+/**
+ * @brief Low level XXX driver initialization.
+ */
+void xxx_lld_init(void) {
+
+}
+
+/**
+ * @brief Configures and activates the XXX peripheral.
+ *
+ * @param[in] xxxp pointer to the @p XXXDriver object
+ */
+void xxx_lld_start(XXXDriver *xxxp) {
+
+  if (xxxp->xxx_state == XXX_STOP) {
+    /* Clock activation.*/
+  }
+  /* Configuration.*/
+}
+
+/**
+ * @brief Deactivates the XXX peripheral.
+ *
+ * @param[in] xxxp pointer to the @p XXXDriver object
+ */
+void xxx_lld_stop(XXXDriver *xxxp) {
+
+}
+
+/** @} */
diff --git a/os/hal/templates/meta/driver_lld.h b/os/hal/templates/meta/driver_lld.h
new file mode 100644
index 000000000..92194664e
--- /dev/null
+++ b/os/hal/templates/meta/driver_lld.h
@@ -0,0 +1,81 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file templates/xxx_lld.h
+ * @brief XXX Driver subsystem low level driver header template
+ * @addtogroup XXX_LLD
+ * @{
+ */
+
+#ifndef _XXX_LLD_H_
+#define _XXX_LLD_H_
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver constants.                                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief Driver configuration structure.
+ * @note It could be empty on some architectures.
+ */
+typedef struct {
+
+} XXXConfig;
+
+/**
+ * @brief Structure representing an XXX driver.
+ */
+typedef struct {
+  /**
+   * @brief Driver state.
+   */
+  xxxstate_t                xxx_state;
+  /**
+   * @brief Current configuration data.
+   */
+  const XXXConfig           *xxx_config;
+  /* End of the mandatory fields.*/
+} XXXDriver;
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void xxx_lld_init(void);
+  void xxx_lld_start(XXXDriver *xxxp);
+  void xxx_lld_stop(XXXDriver *xxxp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _XXX_LLD_H_ */
+
+/** @} */
diff --git a/os/various/syscalls.c b/os/various/syscalls.c
index 23bfea419..8f45a5dd2 100644
--- a/os/various/syscalls.c
+++ b/os/various/syscalls.c
@@ -107,7 +107,9 @@ int _lseek_r(struct _reent *r, int file, int ptr, int dir)
 
 int _write_r(struct _reent *r, int file, char * ptr, int len)
 {
+#if defined(STDOUT_SD)
   int n;
+#endif
 
   (void)r;
   (void)file;