From 56e86c626df3dbf74c1021210636a7c5d92a49ce Mon Sep 17 00:00:00 2001 From: Dominik Sliwa Date: Tue, 30 Oct 2018 16:31:29 +0100 Subject: move to cmake Signed-off-by: Dominik Sliwa --- drivers/src/fsl_lptmr.c | 143 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 drivers/src/fsl_lptmr.c (limited to 'drivers/src/fsl_lptmr.c') diff --git a/drivers/src/fsl_lptmr.c b/drivers/src/fsl_lptmr.c new file mode 100644 index 0000000..67b3b97 --- /dev/null +++ b/drivers/src/fsl_lptmr.c @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * Copyright 2016-2017 NXP + * + * 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 the copyright holder 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_lptmr.h" + +/******************************************************************************* + * Prototypes + ******************************************************************************/ +/*! + * @brief Gets the instance from the base address to be used to gate or ungate the module clock + * + * @param base LPTMR peripheral base address + * + * @return The LPTMR instance + */ +static uint32_t LPTMR_GetInstance(LPTMR_Type *base); + +/******************************************************************************* + * Variables + ******************************************************************************/ +/*! @brief Pointers to LPTMR bases for each instance. */ +static LPTMR_Type *const s_lptmrBases[] = LPTMR_BASE_PTRS; + +#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) +/*! @brief Pointers to LPTMR clocks for each instance. */ +static const clock_ip_name_t s_lptmrClocks[] = LPTMR_CLOCKS; + +#if defined(LPTMR_PERIPH_CLOCKS) +/* Array of LPTMR functional clock name. */ +static const clock_ip_name_t s_lptmrPeriphClocks[] = LPTMR_PERIPH_CLOCKS; +#endif + +#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ + +/******************************************************************************* + * Code + ******************************************************************************/ +static uint32_t LPTMR_GetInstance(LPTMR_Type *base) +{ + uint32_t instance; + + /* Find the instance index from base address mappings. */ + for (instance = 0; instance < ARRAY_SIZE(s_lptmrBases); instance++) + { + if (s_lptmrBases[instance] == base) + { + break; + } + } + + assert(instance < ARRAY_SIZE(s_lptmrBases)); + + return instance; +} + +void LPTMR_Init(LPTMR_Type *base, const lptmr_config_t *config) +{ + assert(config); + +#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) + + uint32_t instance = LPTMR_GetInstance(base); + + /* Ungate the LPTMR clock*/ + CLOCK_EnableClock(s_lptmrClocks[instance]); +#if defined(LPTMR_PERIPH_CLOCKS) + CLOCK_EnableClock(s_lptmrPeriphClocks[instance]); +#endif + +#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ + + /* Configure the timers operation mode and input pin setup */ + base->CSR = (LPTMR_CSR_TMS(config->timerMode) | LPTMR_CSR_TFC(config->enableFreeRunning) | + LPTMR_CSR_TPP(config->pinPolarity) | LPTMR_CSR_TPS(config->pinSelect)); + + /* Configure the prescale value and clock source */ + base->PSR = (LPTMR_PSR_PRESCALE(config->value) | LPTMR_PSR_PBYP(config->bypassPrescaler) | + LPTMR_PSR_PCS(config->prescalerClockSource)); +} + +void LPTMR_Deinit(LPTMR_Type *base) +{ + /* Disable the LPTMR and reset the internal logic */ + base->CSR &= ~LPTMR_CSR_TEN_MASK; +#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) + + uint32_t instance = LPTMR_GetInstance(base); + + /* Gate the LPTMR clock*/ + CLOCK_DisableClock(s_lptmrClocks[instance]); +#if defined(LPTMR_PERIPH_CLOCKS) + CLOCK_DisableClock(s_lptmrPeriphClocks[instance]); +#endif + +#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ +} + +void LPTMR_GetDefaultConfig(lptmr_config_t *config) +{ + assert(config); + + /* Use time counter mode */ + config->timerMode = kLPTMR_TimerModeTimeCounter; + /* Use input 0 as source in pulse counter mode */ + config->pinSelect = kLPTMR_PinSelectInput_0; + /* Pulse input pin polarity is active-high */ + config->pinPolarity = kLPTMR_PinPolarityActiveHigh; + /* Counter resets whenever TCF flag is set */ + config->enableFreeRunning = false; + /* Bypass the prescaler */ + config->bypassPrescaler = true; + /* LPTMR clock source */ + config->prescalerClockSource = kLPTMR_PrescalerClock_1; + /* Divide the prescaler clock by 2 */ + config->value = kLPTMR_Prescale_Glitch_0; +} -- cgit v1.2.3