| /* |
| * Copyright (c) 2015, Freescale Semiconductor, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * o Redistributions of source code must retain the above copyright notice, this list |
| * of conditions and the following disclaimer. |
| * |
| * o Redistributions in binary form must reproduce the above copyright notice, this |
| * list of conditions and the following disclaimer in the documentation and/or |
| * other materials provided with the distribution. |
| * |
| * o Neither the name of Freescale Semiconductor, Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "fsl_pit.h" |
| |
| /******************************************************************************* |
| * Prototypes |
| ******************************************************************************/ |
| /*! |
| * @brief Gets the instance from the base address to be used to gate or ungate the module clock |
| * |
| * @param base PIT peripheral base address |
| * |
| * @return The PIT instance |
| */ |
| static uint32_t PIT_GetInstance(PIT_Type *base); |
| |
| /******************************************************************************* |
| * Variables |
| ******************************************************************************/ |
| /*! @brief Pointers to PIT bases for each instance. */ |
| static PIT_Type *const s_pitBases[] = PIT_BASE_PTRS; |
| |
| /*! @brief Pointers to PIT clocks for each instance. */ |
| static const clock_ip_name_t s_pitClocks[] = PIT_CLOCKS; |
| |
| /******************************************************************************* |
| * Code |
| ******************************************************************************/ |
| static uint32_t PIT_GetInstance(PIT_Type *base) |
| { |
| uint32_t instance; |
| |
| /* Find the instance index from base address mappings. */ |
| for (instance = 0; instance < FSL_FEATURE_SOC_PIT_COUNT; instance++) |
| { |
| if (s_pitBases[instance] == base) |
| { |
| break; |
| } |
| } |
| |
| assert(instance < FSL_FEATURE_SOC_PIT_COUNT); |
| |
| return instance; |
| } |
| |
| void PIT_Init(PIT_Type *base, const pit_config_t *config) |
| { |
| assert(config); |
| |
| /* Ungate the PIT clock*/ |
| CLOCK_EnableClock(s_pitClocks[PIT_GetInstance(base)]); |
| |
| /* Enable PIT timers */ |
| base->MCR &= ~PIT_MCR_MDIS_MASK; |
| |
| /* Config timer operation when in debug mode */ |
| if (config->enableRunInDebug) |
| { |
| base->MCR &= ~PIT_MCR_FRZ_MASK; |
| } |
| else |
| { |
| base->MCR |= PIT_MCR_FRZ_MASK; |
| } |
| } |
| |
| void PIT_Deinit(PIT_Type *base) |
| { |
| /* Disable PIT timers */ |
| base->MCR |= PIT_MCR_MDIS_MASK; |
| |
| /* Gate the PIT clock*/ |
| CLOCK_DisableClock(s_pitClocks[PIT_GetInstance(base)]); |
| } |
| |
| #if defined(FSL_FEATURE_PIT_HAS_LIFETIME_TIMER) && FSL_FEATURE_PIT_HAS_LIFETIME_TIMER |
| |
| uint64_t PIT_GetLifetimeTimerCount(PIT_Type *base) |
| { |
| uint32_t valueH = 0U; |
| uint32_t valueL = 0U; |
| |
| /* LTMR64H should be read before LTMR64L */ |
| valueH = base->LTMR64H; |
| valueL = base->LTMR64L; |
| |
| return (((uint64_t)valueH << 32U) + (uint64_t)(valueL)); |
| } |
| |
| #endif /* FSL_FEATURE_PIT_HAS_LIFETIME_TIMER */ |