Diff: targets/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K22F/drivers/fsl_pit.c

Revision:

149:156823d33999

Parent:

144:ef7eb2e8f9f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Freescale/TARGET_KSDK2_MCUS/TARGET_K22F/drivers/fsl_pit.c	Fri Oct 28 11:17:30 2016 +0100
@@ -0,0 +1,119 @@
+/*
+ * 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 */