Diff: targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_timer.c

Revision:

0:9b334a45a8ff

Child:

50:a417edff4437

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_timer.c	Thu Oct 01 15:25:22 2015 +0300
@@ -0,0 +1,262 @@
+/***************************************************************************//**
+ * @file em_timer.c
+ * @brief Timer/counter (TIMER) Peripheral API
+ * @version 3.20.12
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2014 Silicon Labs, http://www.silabs.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: Silicon Labs has no
+ * obligation to support this Software. Silicon Labs 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.
+ *
+ * Silicon Labs 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_timer.h"
+#if defined(TIMER_COUNT) && (TIMER_COUNT > 0)
+
+#include "em_assert.h"
+
+/***************************************************************************//**
+ * @addtogroup EM_Library
+ * @{
+ ******************************************************************************/
+
+/***************************************************************************//**
+ * @addtogroup TIMER
+ * @brief Timer/Counter (TIMER) Peripheral API
+ * @details
+ *   The timer module consists of three main parts:
+ *   @li General timer config and enable control.
+ *   @li Compare/capture control.
+ *   @li Dead time insertion control (may not be available for all timers).
+ * @{
+ ******************************************************************************/
+
+
+/*******************************************************************************
+ **************************   GLOBAL FUNCTIONS   *******************************
+ ******************************************************************************/
+
+/***************************************************************************//**
+ * @brief
+ *   Initialize TIMER.
+ *
+ * @details
+ *   Notice that counter top must be configured separately with for instance
+ *   TIMER_TopSet(). In addition, compare/capture and dead-time insertion
+ *   init must be initialized separately if used. That should probably
+ *   be done prior to the use of this function if configuring the TIMER to
+ *   start when initialization is completed.
+ *
+ * @param[in] timer
+ *   Pointer to TIMER peripheral register block.
+ *
+ * @param[in] init
+ *   Pointer to TIMER initialization structure.
+ ******************************************************************************/
+void TIMER_Init(TIMER_TypeDef *timer, const TIMER_Init_TypeDef *init)
+{
+  EFM_ASSERT(TIMER_REF_VALID(timer));
+
+  /* Stop timer if specified to be disabled (dosn't hurt if already stopped) */
+  if (!(init->enable))
+  {
+    timer->CMD = TIMER_CMD_STOP;
+  }
+
+  /* Reset counter */
+  timer->CNT = _TIMER_CNT_RESETVALUE;
+
+  timer->CTRL =
+    ((uint32_t)(init->prescale) << _TIMER_CTRL_PRESC_SHIFT) |
+    ((uint32_t)(init->clkSel) << _TIMER_CTRL_CLKSEL_SHIFT) |
+    ((uint32_t)(init->fallAction) << _TIMER_CTRL_FALLA_SHIFT) |
+    ((uint32_t)(init->riseAction) << _TIMER_CTRL_RISEA_SHIFT) |
+    ((uint32_t)(init->mode) << _TIMER_CTRL_MODE_SHIFT) |
+    (init->debugRun               ?   TIMER_CTRL_DEBUGRUN  : 0) |
+    (init->dmaClrAct              ?   TIMER_CTRL_DMACLRACT : 0) |
+    (init->quadModeX4             ?   TIMER_CTRL_QDM_X4    : 0) |
+    (init->oneShot                ?   TIMER_CTRL_OSMEN     : 0) |
+
+#if defined( TIMER_CTRL_X2CNT ) && defined( TIMER_CTRL_ATI )
+    (init->count2x                ?   TIMER_CTRL_X2CNT     : 0) |
+    (init->ati                    ?   TIMER_CTRL_ATI       : 0) |
+#endif
+    (init->sync                   ?   TIMER_CTRL_SYNC      : 0);
+
+  /* Start timer if specified to be enabled (dosn't hurt if already started) */
+  if (init->enable)
+  {
+    timer->CMD = TIMER_CMD_START;
+  }
+}
+
+
+/***************************************************************************//**
+ * @brief
+ *   Initialize TIMER compare/capture channel.
+ *
+ * @details
+ *   Notice that if operating channel in compare mode, the CCV and CCVB register
+ *   must be set separately as required.
+ *
+ * @param[in] timer
+ *   Pointer to TIMER peripheral register block.
+ *
+ * @param[in] ch
+ *   Compare/capture channel to init for.
+ *
+ * @param[in] init
+ *   Pointer to TIMER initialization structure.
+ ******************************************************************************/
+void TIMER_InitCC(TIMER_TypeDef *timer,
+                  unsigned int ch,
+                  const TIMER_InitCC_TypeDef *init)
+{
+  EFM_ASSERT(TIMER_REF_VALID(timer));
+  EFM_ASSERT(TIMER_CH_VALID(ch));
+
+  timer->CC[ch].CTRL =
+    ((uint32_t)(init->eventCtrl) << _TIMER_CC_CTRL_ICEVCTRL_SHIFT) |
+    ((uint32_t)(init->edge) << _TIMER_CC_CTRL_ICEDGE_SHIFT) |
+    ((uint32_t)(init->prsSel) << _TIMER_CC_CTRL_PRSSEL_SHIFT) |
+    ((uint32_t)(init->cufoa) << _TIMER_CC_CTRL_CUFOA_SHIFT) |
+    ((uint32_t)(init->cofoa) << _TIMER_CC_CTRL_COFOA_SHIFT) |
+    ((uint32_t)(init->cmoa) << _TIMER_CC_CTRL_CMOA_SHIFT) |
+    ((uint32_t)(init->mode) << _TIMER_CC_CTRL_MODE_SHIFT) |
+    (init->filter                ?   TIMER_CC_CTRL_FILT_ENABLE : 0) |
+    (init->prsInput              ?   TIMER_CC_CTRL_INSEL_PRS   : 0) |
+    (init->coist                 ?   TIMER_CC_CTRL_COIST       : 0) |
+    (init->outInvert             ?   TIMER_CC_CTRL_OUTINV      : 0);
+}
+
+
+#ifdef _TIMER_DTCTRL_MASK
+/***************************************************************************//**
+ * @brief
+ *   Initialize the TIMER DTI unit.
+ *
+ * @param[in] timer
+ *   Pointer to TIMER peripheral register block.
+ *
+ * @param[in] init
+ *   Pointer to TIMER DTI initialization structure.
+ ******************************************************************************/
+void TIMER_InitDTI(TIMER_TypeDef *timer, const TIMER_InitDTI_TypeDef *init)
+{
+  EFM_ASSERT(TIMER0 == timer);
+
+  /* Make sure the DTI unit is disabled while initializing. */
+  TIMER_EnableDTI (timer, false);
+
+  /* Setup the DTCTRL register.
+     The enable bit will be set at the end of the function if specified. */
+  timer->DTCTRL =
+    (init->autoRestart             ?  TIMER_DTCTRL_DTDAS      : 0) |
+    (init->activeLowOut            ?  TIMER_DTCTRL_DTIPOL     : 0) |
+    (init->invertComplementaryOut  ?  TIMER_DTCTRL_DTCINV     : 0) |
+    (init->enablePrsSource         ?  TIMER_DTCTRL_DTPRSEN    : 0) |
+    ((uint32_t)(init->prsSel)     << _TIMER_DTCTRL_DTPRSSEL_SHIFT);
+
+  /* Setup the DTTIME register. */
+  timer->DTTIME =
+    ((uint32_t)(init->prescale)   << _TIMER_DTTIME_DTPRESC_SHIFT) |
+    ((uint32_t)(init->riseTime)   << _TIMER_DTTIME_DTRISET_SHIFT) |
+    ((uint32_t)(init->fallTime)   << _TIMER_DTTIME_DTFALLT_SHIFT);
+
+  /* Setup the DTFC register. */
+  timer->DTFC =
+    (init->enableFaultSourceCoreLockup     ?  TIMER_DTFC_DTLOCKUPFEN     : 0) |
+    (init->enableFaultSourceDebugger       ?  TIMER_DTFC_DTDBGFEN        : 0) |
+    (init->enableFaultSourcePrsSel0        ?  TIMER_DTFC_DTPRS0FEN       : 0) |
+    (init->enableFaultSourcePrsSel1        ?  TIMER_DTFC_DTPRS1FEN       : 0) |
+    ((uint32_t)(init->faultAction)        << _TIMER_DTFC_DTFA_SHIFT)          |
+    ((uint32_t)(init->faultSourcePrsSel0) << _TIMER_DTFC_DTPRS0FSEL_SHIFT)    |
+    ((uint32_t)(init->faultSourcePrsSel1) << _TIMER_DTFC_DTPRS1FSEL_SHIFT);
+
+  /* Setup the DTOGEN register. */
+  timer->DTOGEN = init->outputsEnableMask;
+
+  /* Clear any previous DTI faults.  */
+  TIMER_ClearDTIFault(timer, TIMER_GetDTIFault(timer));
+
+  /* Enable/disable before returning. */
+  TIMER_EnableDTI (timer, init->enable);
+}
+#endif
+
+
+/***************************************************************************//**
+ * @brief
+ *   Reset TIMER 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] timer
+ *   Pointer to TIMER peripheral register block.
+ ******************************************************************************/
+void TIMER_Reset(TIMER_TypeDef *timer)
+{
+  int i;
+
+  EFM_ASSERT(TIMER_REF_VALID(timer));
+
+  /* Make sure disabled first, before resetting other registers */
+  timer->CMD = TIMER_CMD_STOP;
+
+  timer->CTRL = _TIMER_CTRL_RESETVALUE;
+  timer->IEN  = _TIMER_IEN_RESETVALUE;
+  timer->IFC  = _TIMER_IFC_MASK;
+  timer->TOP  = _TIMER_TOP_RESETVALUE;
+  timer->TOPB = _TIMER_TOPB_RESETVALUE;
+  timer->CNT  = _TIMER_CNT_RESETVALUE;
+  /* Do not reset route register, setting should be done independently */
+  /* (Note: ROUTE register may be locked by DTLOCK register.) */
+
+  for (i = 0; TIMER_CH_VALID(i); i++)
+  {
+    timer->CC[i].CTRL = _TIMER_CC_CTRL_RESETVALUE;
+    timer->CC[i].CCV  = _TIMER_CC_CCV_RESETVALUE;
+    timer->CC[i].CCVB = _TIMER_CC_CCVB_RESETVALUE;
+  }
+
+  /* Reset dead time insertion module, no effect on timers without DTI */
+
+#ifdef TIMER_DTLOCK_LOCKKEY_UNLOCK
+  /* Unlock DTI registers first in case locked */
+  timer->DTLOCK = TIMER_DTLOCK_LOCKKEY_UNLOCK;
+
+  timer->DTCTRL   = _TIMER_DTCTRL_RESETVALUE;
+  timer->DTTIME   = _TIMER_DTTIME_RESETVALUE;
+  timer->DTFC     = _TIMER_DTFC_RESETVALUE;
+  timer->DTOGEN   = _TIMER_DTOGEN_RESETVALUE;
+  timer->DTFAULTC = _TIMER_DTFAULTC_MASK;
+#endif
+}
+
+
+/** @} (end addtogroup TIMER) */
+/** @} (end addtogroup EM_Library) */
+#endif /* defined(TIMER_COUNT) && (TIMER_COUNT > 0) */