diff options
Diffstat (limited to 'bsps/arm/imxrt/mcux-sdk/drivers/ewm/fsl_ewm.c')
-rw-r--r-- | bsps/arm/imxrt/mcux-sdk/drivers/ewm/fsl_ewm.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/bsps/arm/imxrt/mcux-sdk/drivers/ewm/fsl_ewm.c b/bsps/arm/imxrt/mcux-sdk/drivers/ewm/fsl_ewm.c new file mode 100644 index 0000000000..593cf87a50 --- /dev/null +++ b/bsps/arm/imxrt/mcux-sdk/drivers/ewm/fsl_ewm.c @@ -0,0 +1,140 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * Copyright 2016-2017, 2020 NXP + * All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include "fsl_ewm.h" + +/* Component ID definition, used by tools. */ +#ifndef FSL_COMPONENT_ID +#define FSL_COMPONENT_ID "platform.drivers.ewm" +#endif + +/******************************************************************************* + * Code + ******************************************************************************/ + +/*! + * brief Initializes the EWM peripheral. + * + * This function is used to initialize the EWM. After calling, the EWM + * runs immediately according to the configuration. + * Note that, except for the interrupt enable control bit, other control bits and registers are write once after a + * CPU reset. Modifying them more than once generates a bus transfer error. + * + * This is an example. + * code + * ewm_config_t config; + * EWM_GetDefaultConfig(&config); + * config.compareHighValue = 0xAAU; + * EWM_Init(ewm_base,&config); + * endcode + * + * param base EWM peripheral base address + * param config The configuration of the EWM + */ +void EWM_Init(EWM_Type *base, const ewm_config_t *config) +{ + assert(NULL != config); + + uint8_t value = 0U; + +#if !((defined(FSL_FEATURE_SOC_PCC_COUNT) && FSL_FEATURE_SOC_PCC_COUNT) && \ + (defined(FSL_FEATURE_PCC_SUPPORT_EWM_CLOCK_REMOVE) && FSL_FEATURE_PCC_SUPPORT_EWM_CLOCK_REMOVE)) +#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) + CLOCK_EnableClock(kCLOCK_Ewm0); +#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ +#endif + value = EWM_CTRL_EWMEN(config->enableEwm) | EWM_CTRL_ASSIN(config->setInputAssertLogic) | + EWM_CTRL_INEN(config->enableEwmInput) | EWM_CTRL_INTEN(config->enableInterrupt); +#if defined(FSL_FEATURE_EWM_HAS_PRESCALER) && FSL_FEATURE_EWM_HAS_PRESCALER + base->CLKPRESCALER = config->prescaler; +#endif /* FSL_FEATURE_EWM_HAS_PRESCALER */ + +#if defined(FSL_FEATURE_EWM_HAS_CLOCK_SELECT) && FSL_FEATURE_EWM_HAS_CLOCK_SELECT + base->CLKCTRL = (uint8_t)config->clockSource; +#endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT*/ + + base->CMPL = config->compareLowValue; + base->CMPH = config->compareHighValue; + base->CTRL = value; +} + +/*! + * brief Deinitializes the EWM peripheral. + * + * This function is used to shut down the EWM. + * + * param base EWM peripheral base address + */ +void EWM_Deinit(EWM_Type *base) +{ + EWM_DisableInterrupts(base, (uint32_t)kEWM_InterruptEnable); +#if !((defined(FSL_FEATURE_SOC_PCC_COUNT) && FSL_FEATURE_SOC_PCC_COUNT) && \ + (defined(FSL_FEATURE_PCC_SUPPORT_EWM_CLOCK_REMOVE) && FSL_FEATURE_PCC_SUPPORT_EWM_CLOCK_REMOVE)) +#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) + CLOCK_DisableClock(kCLOCK_Ewm0); +#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */ +#endif /* FSL_FEATURE_PCC_SUPPORT_EWM_CLOCK_REMOVE */ +} + +/*! + * brief Initializes the EWM configuration structure. + * + * This function initializes the EWM configuration structure to default values. The default + * values are as follows. + * code + * ewmConfig->enableEwm = true; + * ewmConfig->enableEwmInput = false; + * ewmConfig->setInputAssertLogic = false; + * ewmConfig->enableInterrupt = false; + * ewmConfig->ewm_lpo_clock_source_t = kEWM_LpoClockSource0; + * ewmConfig->prescaler = 0; + * ewmConfig->compareLowValue = 0; + * ewmConfig->compareHighValue = 0xFEU; + * endcode + * + * param config Pointer to the EWM configuration structure. + * see ewm_config_t + */ +void EWM_GetDefaultConfig(ewm_config_t *config) +{ + assert(NULL != config); + + /* Initializes the configure structure to zero. */ + (void)memset(config, 0, sizeof(*config)); + + config->enableEwm = true; + config->enableEwmInput = false; + config->setInputAssertLogic = false; + config->enableInterrupt = false; +#if defined(FSL_FEATURE_EWM_HAS_CLOCK_SELECT) && FSL_FEATURE_EWM_HAS_CLOCK_SELECT + config->clockSource = kEWM_LpoClockSource0; +#endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT*/ +#if defined(FSL_FEATURE_EWM_HAS_PRESCALER) && FSL_FEATURE_EWM_HAS_PRESCALER + config->prescaler = 0U; +#endif /* FSL_FEATURE_EWM_HAS_PRESCALER */ + config->compareLowValue = 0U; + config->compareHighValue = 0xFEU; +} + +/*! + * brief Services the EWM. + * + * This function resets the EWM counter to zero. + * + * param base EWM peripheral base address + */ +void EWM_Refresh(EWM_Type *base) +{ + uint32_t primaskValue = 0U; + + /* Disable the global interrupt to protect refresh sequence */ + primaskValue = DisableGlobalIRQ(); + base->SERV = (uint8_t)0xB4U; + base->SERV = (uint8_t)0x2CU; + EnableGlobalIRQ(primaskValue); +} |