added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_timer.c
- Committer:
- <>
- Date:
- 2016-09-02
- Revision:
- 144:ef7eb2e8f9f7
- Parent:
- 50:a417edff4437
File content as of revision 144:ef7eb2e8f9f7:
/***************************************************************************//** * @file em_timer.c * @brief Timer/counter (TIMER) 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_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); } #if defined(_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 */ #if defined(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) */