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diff --git a/watch-library/hpl/gclk/hpl_gclk_base.h b/watch-library/hpl/gclk/hpl_gclk_base.h
new file mode 100644
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+++ b/watch-library/hpl/gclk/hpl_gclk_base.h
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+/**
+ * \file
+ *
+ * \brief Generic Clock Controller.
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#ifndef _HPL_GCLK_H_INCLUDED
+#define _HPL_GCLK_H_INCLUDED
+
+#include <compiler.h>
+#ifdef _UNIT_TEST_
+#include <hri_gclk1_v210_mock.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \addtogroup gclk_group GCLK Hardware Proxy Layer
+ *
+ * \section gclk_hpl_rev Revision History
+ * - v0.0.0.1 Initial Commit
+ *
+ *@{
+ */
+
+/**
+ * \name HPL functions
+ */
+//@{
+/**
+ * \brief Enable clock on the given channel with the given clock source
+ *
+ * This function maps the given clock source to the given clock channel
+ * and enables channel.
+ *
+ * \param[in] channel The channel to enable clock for
+ * \param[in] source The clock source for the given channel
+ */
+static inline void _gclk_enable_channel(const uint8_t channel, const uint8_t source)
+{
+
+	hri_gclk_write_PCHCTRL_reg(GCLK, channel, source | GCLK_PCHCTRL_CHEN);
+}
+
+/**
+ * \brief Initialize GCLK generators by function references
+ * \param[in] bm Bit mapping for referenced generators,
+ *               a bit 1 in position triggers generator initialization.
+ */
+void _gclk_init_generators_by_fref(uint32_t bm);
+
+//@}
+/**@}*/
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HPL_GCLK_H_INCLUDED */