added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

Revision:
50:a417edff4437
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_rtcc.c	Fri Jan 15 07:45:16 2016 +0000
@@ -0,0 +1,180 @@
+/***************************************************************************//**
+ * @file
+ * @brief Real Time Counter with Calendar (RTCC) Peripheral API
+ * @version 4.2.1
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2015 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_rtcc.h"
+#if defined( RTCC_COUNT ) && ( RTCC_COUNT == 1 )
+#include "em_bus.h"
+
+/***************************************************************************//**
+ * @addtogroup EM_Library
+ * @{
+ ******************************************************************************/
+
+/***************************************************************************//**
+ * @addtogroup RTCC
+ * @brief Real Time Counter (RTCC) Peripheral API
+ * @{
+ ******************************************************************************/
+
+/*******************************************************************************
+ *******************************   DEFINES   ***********************************
+ ******************************************************************************/
+
+/*******************************************************************************
+ **************************   LOCAL FUNCTIONS   ********************************
+ ******************************************************************************/
+
+/*******************************************************************************
+ **************************   GLOBAL FUNCTIONS   *******************************
+ ******************************************************************************/
+
+/***************************************************************************//**
+ * @brief
+ *   Configure the selected capture/compare channel of the RTCC.
+ *
+ * @details
+ *   Use this function to configure a RTCC channel.
+ *   Select capture/compare mode, match output action, overflow output action
+ *   and PRS input configuration.
+ *   Refer to the configuration structure @ref RTCC_CCChConf_TypeDef for more
+ *   details.
+ *
+ * @param[in] ch
+ *   Channel selector.
+ *
+ * @param[in] confPtr
+ *   Pointer to configuration structure.
+ ******************************************************************************/
+void RTCC_ChannelInit( int ch, RTCC_CCChConf_TypeDef const *confPtr )
+{
+  EFM_ASSERT( RTCC_CH_VALID( ch ) );
+  EFM_ASSERT( (uint32_t)confPtr->compMask
+              < ( _RTCC_CC_CTRL_COMPMASK_MASK >> _RTCC_CC_CTRL_COMPMASK_SHIFT )
+              + 1 );
+
+  /** Configure the selected capture/compare channel. */
+  RTCC->CC[ch].CTRL = ( (uint32_t)confPtr->chMode << _RTCC_CC_CTRL_MODE_SHIFT )
+                      | ( (uint32_t)confPtr->compMatchOutAction << _RTCC_CC_CTRL_CMOA_SHIFT )
+                      | ( (uint32_t)confPtr->prsSel << _RTCC_CC_CTRL_PRSSEL_SHIFT )
+                      | ( (uint32_t)confPtr->inputEdgeSel << _RTCC_CC_CTRL_ICEDGE_SHIFT )
+                      | ( (uint32_t)confPtr->compBase << _RTCC_CC_CTRL_COMPBASE_SHIFT )
+                      | ( (uint32_t)confPtr->compMask << _RTCC_CC_CTRL_COMPMASK_SHIFT )
+                      | ( (uint32_t)confPtr->dayCompMode << _RTCC_CC_CTRL_DAYCC_SHIFT );
+}
+
+/***************************************************************************//**
+ * @brief
+ *   Enable/disable RTCC.
+ *
+ * @param[in] enable
+ *   True to enable RTCC, false to disable.
+ ******************************************************************************/
+void RTCC_Enable( bool enable )
+{
+  /* Bitbanding the enable bit in the CTRL register (atomic). */
+  BUS_RegBitWrite((&RTCC->CTRL), _RTCC_CTRL_ENABLE_SHIFT, enable);
+}
+
+/***************************************************************************//**
+ * @brief
+ *   Initialize RTCC.
+ *
+ * @details
+ *   Note that the compare values must be set separately with RTCC_CompareSet().
+ *   That should probably be done prior to the use of this function if
+ *   configuring the RTCC to start when initialization is completed.
+ *
+ * @param[in] init
+ *   Pointer to RTCC initialization structure.
+ ******************************************************************************/
+void RTCC_Init( const RTCC_Init_TypeDef *init )
+{
+  RTCC->CTRL = ( (uint32_t)init->enable << _RTCC_CTRL_ENABLE_SHIFT )
+               | ( (uint32_t)init->debugRun << _RTCC_CTRL_DEBUGRUN_SHIFT )
+               | ( (uint32_t)init->precntWrapOnCCV0 << _RTCC_CTRL_PRECCV0TOP_SHIFT )
+               | ( (uint32_t)init->cntWrapOnCCV1 << _RTCC_CTRL_CCV1TOP_SHIFT )
+               | ( (uint32_t)init->presc << _RTCC_CTRL_CNTPRESC_SHIFT )
+               | ( (uint32_t)init->prescMode << _RTCC_CTRL_CNTTICK_SHIFT )
+#if defined(_RTCC_CTRL_BUMODETSEN_MASK)
+               | ( (uint32_t)init->enaBackupModeSet << _RTCC_CTRL_BUMODETSEN_SHIFT )
+#endif
+               | ( (uint32_t)init->enaOSCFailDetect << _RTCC_CTRL_OSCFDETEN_SHIFT )
+               | ( (uint32_t)init->cntMode << _RTCC_CTRL_CNTMODE_SHIFT )
+               | ( (uint32_t)init->disLeapYearCorr << _RTCC_CTRL_LYEARCORRDIS_SHIFT );
+}
+
+/***************************************************************************//**
+ * @brief
+ *   Restore RTCC to its reset state.
+ ******************************************************************************/
+void RTCC_Reset( void )
+{
+  int i;
+
+  /* Restore all RTCC registers to their default values. */
+  RTCC_Unlock();
+  RTCC->CTRL    = _RTCC_CTRL_RESETVALUE;
+  RTCC->PRECNT  = _RTCC_PRECNT_RESETVALUE;
+  RTCC->CNT     = _RTCC_CNT_RESETVALUE;
+  RTCC->TIME    = _RTCC_TIME_RESETVALUE;
+  RTCC->DATE    = _RTCC_DATE_RESETVALUE;
+  RTCC->IEN     = _RTCC_IEN_RESETVALUE;
+  RTCC->IFC     = _RTCC_IFC_MASK;
+  RTCC_StatusClear();
+  RTCC->EM4WUEN = _RTCC_EM4WUEN_RESETVALUE;
+
+  for (i = 0; i < 3; i++)
+  {
+    RTCC->CC[i].CTRL = _RTCC_CC_CTRL_RESETVALUE;
+    RTCC->CC[i].CCV  = _RTCC_CC_CCV_RESETVALUE;
+    RTCC->CC[i].TIME = _RTCC_CC_TIME_RESETVALUE;
+    RTCC->CC[i].DATE = _RTCC_CC_DATE_RESETVALUE;
+  }
+}
+
+/***************************************************************************//**
+ * @brief
+ *   Clear STATUS register.
+ ******************************************************************************/
+void RTCC_StatusClear( void )
+{
+  while ( RTCC->SYNCBUSY & RTCC_SYNCBUSY_CMD )
+  {
+    // Wait for syncronization.
+  }
+  RTCC->CMD = RTCC_CMD_CLRSTATUS;
+}
+
+/** @} (end addtogroup RTCC) */
+/** @} (end addtogroup EM_Library) */
+
+#endif /* defined( RTCC_COUNT ) && ( RTCC_COUNT == 1 ) */