1 files changed, 143 insertions, 0 deletions
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;
+}