1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/src/fsl_ewm.c b/drivers/src/fsl_ewm.c
new file mode 100644
index 0000000..f22eff9
--- /dev/null
+++ b/drivers/src/fsl_ewm.c
@@ -0,0 +1,102 @@
+/*
+ * 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_ewm.h"
+
+/*******************************************************************************
+ * Code
+ ******************************************************************************/
+
+void EWM_Init(EWM_Type *base, const ewm_config_t *config)
+{
+    assert(config);
+
+    uint32_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 = config->clockSource;
+#endif /* FSL_FEATURE_EWM_HAS_CLOCK_SELECT*/
+
+    base->CMPL = config->compareLowValue;
+    base->CMPH = config->compareHighValue;
+    base->CTRL = value;
+}
+
+void EWM_Deinit(EWM_Type *base)
+{
+    EWM_DisableInterrupts(base, 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 */
+}
+
+void EWM_GetDefaultConfig(ewm_config_t *config)
+{
+    assert(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;
+}
+
+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);
+}