*** EFM32 branch ***

1. Upgrade Cortex driver library (CMSIS -> CMSIS & Device): version 2.3.2 -> 3.0.1 & 3.0.0
 - Remove "bsp/efm32/Libraries/CMSIS/Lib/ARM", "bsp/efm32/Libraries/CMSIS/Lib/G++" and "bsp/efm32/Libraries/CMSIS/SVD" to save space
2. Upgrade EFM32 driver libraries (efm32lib -> emlib): version 2.3.2 -> 3.0.0
 - Remove "bsp/efm32/Libraries/Device/EnergyMicro/EFM32LG" and "bsp/efm32/Libraries/Device/EnergyMicro/EFM32TG" to save space
3. Upgrade EFM32GG_DK3750 development kit driver library: version 1.2.2 -> 2.0.1
4. Upgrade EFM32_Gxxx_DK development kit driver library: version 1.7.3 -> 2.0.1
5. Add energy management unit driver and test code
6. Modify linker script and related code to compatible with new version of libraries
7. Change EFM32 branch version number to 1.0
8. Add photo frame demo application

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2122 bbd45198-f89e-11dd-88c7-29a3b14d5316

1 files changed, 533 insertions, 0 deletions

diff --git a/bsp/efm32/Libraries/emlib/src/em_letimer.c b/bsp/efm32/Libraries/emlib/src/em_letimer.c
new file mode 100644
index 0000000000..6aea73b5d0
--- /dev/null
+++ b/bsp/efm32/Libraries/emlib/src/em_letimer.c
@@ -0,0 +1,533 @@
+/***************************************************************************//**

+ * @file

+ * @brief Low Energy Timer (LETIMER) Peripheral API

+ * @author Energy Micro AS

+ * @version 3.0.0

+ *******************************************************************************

+ * @section License

+ * <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>

+ *******************************************************************************

+ *

+ * Permission is granted to anyone to use this software for any purpose,

+ * including commercial applications, and to alter it and redistribute it

+ * freely, subject to the following restrictions:

+ *

+ * 1. The origin of this software must not be misrepresented; you must not

+ *    claim that you wrote the original software.

+ * 2. Altered source versions must be plainly marked as such, and must not be

+ *    misrepresented as being the original software.

+ * 3. This notice may not be removed or altered from any source distribution.

+ *

+ * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no

+ * obligation to support this Software. Energy Micro AS is providing the

+ * Software "AS IS", with no express or implied warranties of any kind,

+ * including, but not limited to, any implied warranties of merchantability

+ * or fitness for any particular purpose or warranties against infringement

+ * of any proprietary rights of a third party.

+ *

+ * Energy Micro AS will not be liable for any consequential, incidental, or

+ * special damages, or any other relief, or for any claim by any third party,

+ * arising from your use of this Software.

+ *

+ ******************************************************************************/

+#include "em_letimer.h"

+#include "em_cmu.h"

+#include "em_assert.h"

+

+/***************************************************************************//**

+ * @addtogroup EM_Library

+ * @{

+ ******************************************************************************/

+

+/***************************************************************************//**

+ * @addtogroup LETIMER

+ * @brief Low Energy Timer (LETIMER) Peripheral API

+ * @{

+ ******************************************************************************/

+

+/*******************************************************************************

+ *******************************   DEFINES   ***********************************

+ ******************************************************************************/

+

+/** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */

+

+/** Validation of valid comparator register for assert statements. */

+#define LETIMER_COMP_REG_VALID(reg)    (((reg) <= 1))

+

+/** Validation of LETIMER register block pointer reference for assert statements. */

+#define LETIMER_REF_VALID(ref)         ((ref) == LETIMER0)

+

+/** Validation of valid repeat counter register for assert statements. */

+#define LETIMER_REP_REG_VALID(reg)     (((reg) <= 1))

+

+/** @endcond */

+

+

+/*******************************************************************************

+ **************************   LOCAL FUNCTIONS   ********************************

+ ******************************************************************************/

+

+/** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */

+

+#if defined(_EFM32_GECKO_FAMILY)

+/***************************************************************************//**

+ * @brief

+ *   Wait for ongoing sync of register(s) to low frequency domain to complete.

+ *

+ * @note

+ *   This only applies to the Gecko Family, see the reference manual

+ *   chapter about Access to Low Energy Peripherals (Asynchronos Registers)

+ *   for details.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block

+ *

+ * @param[in] mask

+ *   Bitmask corresponding to SYNCBUSY register defined bits, indicating

+ *   registers that must complete any ongoing synchronization.

+ ******************************************************************************/

+__STATIC_INLINE void LETIMER_Sync(LETIMER_TypeDef *letimer, uint32_t mask)

+{

+  /* Avoid deadlock if modifying the same register twice when freeze mode is */

+  /* activated. */

+  if (letimer->FREEZE & LETIMER_FREEZE_REGFREEZE)

+    return;

+

+  /* Wait for any pending previous write operation to have been completed */

+  /* in low frequency domain, only required for Gecko Family of devices  */

+  while (letimer->SYNCBUSY & mask)

+    ;

+}

+#endif

+

+/** @endcond */

+

+/*******************************************************************************

+ **************************   GLOBAL FUNCTIONS   *******************************

+ ******************************************************************************/

+

+/***************************************************************************//**

+ * @brief

+ *   Get LETIMER compare register value.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block

+ *

+ * @param[in] comp

+ *   Compare register to get, either 0 or 1

+ *

+ * @return

+ *   Compare register value, 0 if invalid register selected.

+ ******************************************************************************/

+uint32_t LETIMER_CompareGet(LETIMER_TypeDef *letimer, unsigned int comp)

+{

+  uint32_t ret;

+

+  EFM_ASSERT(LETIMER_REF_VALID(letimer) && LETIMER_COMP_REG_VALID(comp));

+

+  /* Initialize selected compare value */

+  switch (comp)

+  {

+  case 0:

+    ret = letimer->COMP0;

+    break;

+

+  case 1:

+    ret = letimer->COMP1;

+    break;

+

+  default:

+    /* Unknown compare register selected */

+    ret = 0;

+    break;

+  }

+

+  return(ret);

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   Set LETIMER compare register value.

+ *

+ * @note

+ *   The setting of a compare register requires synchronization into the

+ *   low frequency domain. If the same register is modified before a previous

+ *   update has completed, this function will stall until the previous

+ *   synchronization has completed. This only applies to the Gecko Family, see

+ *   comment in the LETIMER_Sync() internal function call.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block

+ *

+ * @param[in] comp

+ *   Compare register to set, either 0 or 1

+ *

+ * @param[in] value

+ *   Initialization value (<= 0x0000ffff)

+ ******************************************************************************/

+void LETIMER_CompareSet(LETIMER_TypeDef *letimer,

+                        unsigned int comp,

+                        uint32_t value)

+{

+  volatile uint32_t *compReg;

+  uint32_t          syncbusy;

+

+  EFM_ASSERT(LETIMER_REF_VALID(letimer) &&

+             LETIMER_COMP_REG_VALID(comp) &&

+             ((value & ~(_LETIMER_COMP0_COMP0_MASK >> _LETIMER_COMP0_COMP0_SHIFT)) == 0));

+

+  /* Initialize selected compare value */

+  switch (comp)

+  {

+  case 0:

+    compReg  = &(letimer->COMP0);

+    syncbusy = LETIMER_SYNCBUSY_COMP0;

+    break;

+

+  case 1:

+    compReg  = &(letimer->COMP1);

+    syncbusy = LETIMER_SYNCBUSY_COMP1;

+    break;

+

+  default:

+    /* Unknown compare register selected, abort */

+    return;

+  }

+

+#if defined(_EFM32_GECKO_FAMILY)

+  /* LF register about to be modified require sync. busy check */

+  LETIMER_Sync(letimer, syncbusy);

+#endif

+

+  *compReg = value;

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   Start/stop LETIMER.

+ *

+ * @note

+ *   The enabling/disabling of the LETIMER modifies the LETIMER CMD register

+ *   which requires synchronization into the low frequency domain. If this

+ *   register is modified before a previous update to the same register has

+ *   completed, this function will stall until the previous synchronization has

+ *   completed. This only applies to the Gecko Family, see comment in the

+ *   LETIMER_Sync() internal function call.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block.

+ *

+ * @param[in] enable

+ *   true to enable counting, false to disable.

+ ******************************************************************************/

+void LETIMER_Enable(LETIMER_TypeDef *letimer, bool enable)

+{

+  EFM_ASSERT(LETIMER_REF_VALID(letimer));

+

+#if defined(_EFM32_GECKO_FAMILY)

+  /* LF register about to be modified require sync. busy check */

+  LETIMER_Sync(letimer, LETIMER_SYNCBUSY_CMD);

+#endif

+

+  if (enable)

+  {

+    letimer->CMD = LETIMER_CMD_START;

+  }

+  else

+  {

+    letimer->CMD = LETIMER_CMD_STOP;

+  }

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   LETIMER register synchronization freeze control.

+ *

+ * @details

+ *   Some LETIMER registers require synchronization into the low frequency (LF)

+ *   domain. The freeze feature allows for several such registers to be

+ *   modified before passing them to the LF domain simultaneously (which

+ *   takes place when the freeze mode is disabled).

+ *

+ * @note

+ *   When enabling freeze mode, this function will wait for all current

+ *   ongoing LETIMER synchronization to LF domain to complete (Normally

+ *   synchronization will not be in progress.) However for this reason, when

+ *   using freeze mode, modifications of registers requiring LF synchronization

+ *   should be done within one freeze enable/disable block to avoid unecessary

+ *   stalling.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block.

+ *

+ * @param[in] enable

+ *   @li true - enable freeze, modified registers are not propagated to the

+ *       LF domain

+ *   @li false - disables freeze, modified registers are propagated to LF

+ *       domain

+ ******************************************************************************/

+void LETIMER_FreezeEnable(LETIMER_TypeDef *letimer, bool enable)

+{

+  if (enable)

+  {

+    /*

+     * Wait for any ongoing LF synchronization to complete. This is just to

+     * protect against the rare case when a user

+     * - modifies a register requiring LF sync

+     * - then enables freeze before LF sync completed

+     * - then modifies the same register again

+     * since modifying a register while it is in sync progress should be

+     * avoided.

+     */

+    while (letimer->SYNCBUSY)

+      ;

+

+    letimer->FREEZE = LETIMER_FREEZE_REGFREEZE;

+  }

+  else

+  {

+    letimer->FREEZE = 0;

+  }

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   Initialize LETIMER.

+ *

+ * @details

+ *   Note that the compare/repeat values must be set separately with

+ *   LETIMER_CompareSet() and LETIMER_RepeatSet(). That should probably be done

+ *   prior to the use of this function if configuring the LETIMER to start when

+ *   initialization is completed.

+ *

+ * @note

+ *   The initialization of the LETIMER modifies the LETIMER CTRL/CMD registers

+ *   which require synchronization into the low frequency domain. If any of those

+ *   registers are modified before a previous update to the same register has

+ *   completed, this function will stall until the previous synchronization has

+ *   completed. This only applies to the Gecko Family, see comment in the

+ *   LETIMER_Sync() internal function call.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block.

+ *

+ * @param[in] init

+ *   Pointer to LETIMER initialization structure.

+ ******************************************************************************/

+void LETIMER_Init(LETIMER_TypeDef *letimer, const LETIMER_Init_TypeDef *init)

+{

+  uint32_t tmp = 0;

+

+  EFM_ASSERT(LETIMER_REF_VALID(letimer));

+

+  /* Stop timer if specified to be disabled and running */

+  if (!(init->enable) && (letimer->STATUS & LETIMER_STATUS_RUNNING))

+  {

+#if defined(_EFM32_GECKO_FAMILY)

+    /* LF register about to be modified require sync. busy check */

+    LETIMER_Sync(letimer, LETIMER_SYNCBUSY_CMD);

+#endif

+    letimer->CMD = LETIMER_CMD_STOP;

+  }

+

+  /* Configure DEBUGRUN flag, sets whether or not counter should be

+   * updated when debugger is active */

+  if (init->debugRun)

+  {

+    tmp |= LETIMER_CTRL_DEBUGRUN;

+  }

+

+  if (init->rtcComp0Enable)

+  {

+    tmp |= LETIMER_CTRL_RTCC0TEN;

+  }

+

+  if (init->rtcComp1Enable)

+  {

+    tmp |= LETIMER_CTRL_RTCC1TEN;

+  }

+

+  if (init->comp0Top)

+  {

+    tmp |= LETIMER_CTRL_COMP0TOP;

+  }

+

+  if (init->bufTop)

+  {

+    tmp |= LETIMER_CTRL_BUFTOP;

+  }

+

+  if (init->out0Pol)

+  {

+    tmp |= LETIMER_CTRL_OPOL0;

+  }

+

+  if (init->out1Pol)

+  {

+    tmp |= LETIMER_CTRL_OPOL1;

+  }

+

+  tmp |= init->ufoa0 << _LETIMER_CTRL_UFOA0_SHIFT;

+  tmp |= init->ufoa1 << _LETIMER_CTRL_UFOA1_SHIFT;

+  tmp |= init->repMode << _LETIMER_CTRL_REPMODE_SHIFT;

+

+#if defined(_EFM32_GECKO_FAMILY)

+  /* LF register about to be modified require sync. busy check */

+  LETIMER_Sync(letimer, LETIMER_SYNCBUSY_CTRL);

+#endif

+  letimer->CTRL = tmp;

+

+  /* Start timer if specified to be enabled and not already running */

+  if (init->enable && !(letimer->STATUS & LETIMER_STATUS_RUNNING))

+  {

+#if defined(_EFM32_GECKO_FAMILY)

+    /* LF register about to be modified require sync. busy check */

+    LETIMER_Sync(letimer, LETIMER_SYNCBUSY_CMD);

+#endif

+    letimer->CMD = LETIMER_CMD_START;

+  }

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   Get LETIMER repeat register value.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block

+ *

+ * @param[in] rep

+ *   Repeat register to get, either 0 or 1

+ *

+ * @return

+ *   Repeat register value, 0 if invalid register selected.

+ ******************************************************************************/

+uint32_t LETIMER_RepeatGet(LETIMER_TypeDef *letimer, unsigned int rep)

+{

+  uint32_t ret;

+

+  EFM_ASSERT(LETIMER_REF_VALID(letimer) && LETIMER_REP_REG_VALID(rep));

+

+  /* Initialize selected compare value */

+  switch (rep)

+  {

+  case 0:

+    ret = letimer->REP0;

+    break;

+

+  case 1:

+    ret = letimer->REP1;

+    break;

+

+  default:

+    /* Unknown compare register selected */

+    ret = 0;

+    break;

+  }

+

+  return(ret);

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   Set LETIMER repeat counter register value.

+ *

+ * @note

+ *   The setting of a repeat counter register requires synchronization into the

+ *   low frequency domain. If the same register is modified before a previous

+ *   update has completed, this function will stall until the previous

+ *   synchronization has completed. This only applies to the Gecko Family, see

+ *   comment in the LETIMER_Sync() internal function call.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block

+ *

+ * @param[in] rep

+ *   Repeat counter register to set, either 0 or 1

+ *

+ * @param[in] value

+ *   Initialization value (<= 0x0000ffff)

+ ******************************************************************************/

+void LETIMER_RepeatSet(LETIMER_TypeDef *letimer,

+                       unsigned int rep,

+                       uint32_t value)

+{

+  volatile uint32_t *repReg;

+#if defined(_EFM32_GECKO_FAMILY)

+  uint32_t          syncbusy;

+#endif

+  EFM_ASSERT(LETIMER_REF_VALID(letimer) &&

+             LETIMER_REP_REG_VALID(rep) &&

+             ((value & ~(_LETIMER_REP0_REP0_MASK >> _LETIMER_REP0_REP0_SHIFT)) == 0));

+

+  /* Initialize selected compare value */

+  switch (rep)

+  {

+  case 0:

+    repReg = &(letimer->REP0);

+#if defined(_EFM32_GECKO_FAMILY)

+    syncbusy = LETIMER_SYNCBUSY_REP0;

+#endif

+    break;

+

+  case 1:

+    repReg = &(letimer->REP1);

+#if defined(_EFM32_GECKO_FAMILY)

+    syncbusy = LETIMER_SYNCBUSY_REP1;

+#endif

+    break;

+

+  default:

+    /* Unknown compare register selected, abort */

+    return;

+  }

+

+#if defined(_EFM32_GECKO_FAMILY)

+  /* LF register about to be modified require sync. busy check */

+  LETIMER_Sync(letimer, syncbusy);

+#endif

+

+  *repReg = value;

+}

+

+

+/***************************************************************************//**

+ * @brief

+ *   Reset LETIMER to same state as after a HW reset.

+ *

+ * @note

+ *   The ROUTE register is NOT reset by this function, in order to allow for

+ *   centralized setup of this feature.

+ *

+ * @param[in] letimer

+ *   Pointer to LETIMER peripheral register block.

+ ******************************************************************************/

+void LETIMER_Reset(LETIMER_TypeDef *letimer)

+{

+  /* Freeze registers to avoid stalling for LF synchronization */

+  LETIMER_FreezeEnable(letimer, true);

+

+  /* Make sure disabled first, before resetting other registers */

+  letimer->CMD = LETIMER_CMD_STOP | LETIMER_CMD_CLEAR |

+                 LETIMER_CMD_CTO0 | LETIMER_CMD_CTO1;

+  letimer->CTRL  = _LETIMER_CTRL_RESETVALUE;

+  letimer->COMP0 = _LETIMER_COMP0_RESETVALUE;

+  letimer->COMP1 = _LETIMER_COMP1_RESETVALUE;

+  letimer->REP0  = _LETIMER_REP0_RESETVALUE;

+  letimer->REP1  = _LETIMER_REP1_RESETVALUE;

+  letimer->IEN   = _LETIMER_IEN_RESETVALUE;

+  letimer->IFC   = _LETIMER_IFC_MASK;

+  /* Do not reset route register, setting should be done independently */

+

+  /* Unfreeze registers, pass new settings on to LETIMER */

+  LETIMER_FreezeEnable(letimer, false);

+}

+

+

+/** @} (end addtogroup LETIMER) */

+/** @} (end addtogroup EM_Library) */