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-rw-r--r--bsps/arm/imxrt/mcux-sdk/drivers/ewm/fsl_ewm.c140
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);
+}