diff --git a/sysmoOCTSIM/hal/include/hpl_spi_s_async.h b/sysmoOCTSIM/hal/include/hpl_spi_s_async.h
new file mode 100644
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+++ b/sysmoOCTSIM/hal/include/hpl_spi_s_async.h
@@ -0,0 +1,227 @@
+/**
+ * \file
+ *
+ * \brief SPI Slave Async related functionality declaration.
+ *
+ * Copyright (c) 2015-2018 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_SPI_S_ASYNC_H_INCLUDED
+#define _HPL_SPI_S_ASYNC_H_INCLUDED
+
+#include <hpl_spi_async.h>
+
+/**
+ * \addtogroup hpl_spi HPL SPI
+ *
+ *
+ *@{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Uses common SPI async device driver. */
+#define _spi_s_async_dev _spi_async_dev
+
+#define _spi_s_async_dev_cb_type _spi_async_dev_cb_type
+
+/** Uses common SPI async device driver complete callback type. */
+#define _spi_m_async_dev_cb_error_t _spi_async_dev_cb_error_t
+
+/** Uses common SPI async device driver transfer callback type. */
+#define _spi_s_async_dev_cb_xfer_t _spi_async_dev_cb_xfer_t
+
+/**
+ *  \brief Initialize SPI for access with interrupts
+ *  It will load default hardware configuration and software struct.
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \param[in] hw Pointer to the hardware base.
+ *  \return Operation status.
+ *  \retval ERR_INVALID_ARG Input parameter problem.
+ *  \retval ERR_BUSY SPI hardware not ready (resetting).
+ *  \retval ERR_DENIED SPI has been enabled.
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_init(struct _spi_s_async_dev *dev, void *const hw);
+
+/**
+ *  \brief Initialize SPI for access with interrupts
+ *  Disable, reset the hardware and the software struct.
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \return Operation status.
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_deinit(struct _spi_s_async_dev *dev);
+
+/**
+ *  \brief Enable SPI for access with interrupts
+ *  Enable the SPI and enable callback generation of receive and error
+ *  interrupts.
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \return Operation status.
+ *  \retval ERR_INVALID_ARG Input parameter problem.
+ *  \retval ERR_BUSY SPI hardware not ready (resetting).
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_enable(struct _spi_s_async_dev *dev);
+
+/**
+ *  \brief Disable SPI for access without interrupts
+ *  Disable SPI and interrupts. Deactivate all CS pins if works as master.
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \return Operation status.
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_disable(struct _spi_s_async_dev *dev);
+
+/**
+ *  \brief Set SPI transfer mode
+ *  Set SPI transfer mode (\ref spi_transfer_mode),
+ *  which controls clock polarity and clock phase.
+ *  Mode 0: leading edge is rising edge, data sample on leading edge.
+ *  Mode 1: leading edge is rising edge, data sample on trailing edge.
+ *  Mode 2: leading edge is falling edge, data sample on leading edge.
+ *  Mode 3: leading edge is falling edge, data sample on trailing edge.
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \param[in] mode The SPI transfer mode.
+ *  \return Operation status.
+ *  \retval ERR_BUSY SPI is not ready to accept new setting.
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_set_mode(struct _spi_s_async_dev *dev, const enum spi_transfer_mode mode);
+
+/**
+ *  \brief Set SPI baudrate
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \param[in] char_size The character size, see \ref spi_char_size.
+ *  \return Operation status.
+ *  \retval ERR_INVALID_ARG The character size is not supported.
+ *  \retval ERR_BUSY SPI is not ready to accept new setting.
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_set_char_size(struct _spi_s_async_dev *dev, const enum spi_char_size char_size);
+
+/**
+ *  \brief Set SPI data order
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \param[in] dord SPI data order (LSB/MSB first).
+ *  \return Operation status.
+ *  \retval ERR_INVALID_ARG The character size is not supported.
+ *  \retval ERR_BUSY SPI is not ready to accept new setting.
+ *  \retval 0 Operation done successfully.
+ */
+int32_t _spi_s_async_set_data_order(struct _spi_s_async_dev *dev, const enum spi_data_order dord);
+
+/**
+ * \brief Enable interrupt on character output
+ *
+ * Enable interrupt when a new character can be written
+ * to the SPI device.
+ *
+ * \param[in] dev   Pointer to the SPI device instance
+ * \param[in] state true  = enable output interrupt
+ *                  false = disable output interrupt
+ *
+ * \return Status code
+ * \retval 0 Ok status
+ */
+int32_t _spi_s_async_enable_tx(struct _spi_s_async_dev *dev, bool state);
+
+/**
+ * \brief Enable interrupt on character input
+ *
+ * Enable interrupt when a new character is ready to be
+ * read from the SPI device.
+ *
+ * \param[in] dev  Pointer to the SPI device instance
+ * \param[in] state true  = enable input interrupts
+ *                  false = disable input interrupt
+ *
+ * \return Status code
+ * \retvat 0 OK Status
+ */
+int32_t _spi_s_async_enable_rx(struct _spi_s_async_dev *dev, bool state);
+
+/**
+ * \brief Enable interrupt on Slave Select (SS) rising
+ *
+ * \param[in] dev  Pointer to the SPI device instance
+ * \param[in] state true  = enable input interrupts
+ *                  false = disable input interrupt
+ *
+ * \return Status code
+ * \retvat 0 OK Status
+ */
+int32_t _spi_s_async_enable_ss_detect(struct _spi_s_async_dev *dev, bool state);
+
+/**
+ *  \brief Read one character to SPI device instance
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *
+ *  \return Character read from SPI module
+ */
+uint16_t _spi_s_async_read_one(struct _spi_s_async_dev *dev);
+
+/**
+ *  \brief Write one character to assigned buffer
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \param[in] data
+ *
+ *  \return Status code of write operation
+ *  \retval 0 Write operation OK
+ */
+int32_t _spi_s_async_write_one(struct _spi_s_async_dev *dev, uint16_t data);
+
+/**
+ *  \brief Register the SPI device callback
+ *  \param[in, out] dev Pointer to the SPI device instance.
+ *  \param[in] cb_type The callback type.
+ *  \param[in] func The callback function to register. NULL to disable callback.
+ *  \return Always 0.
+ */
+int32_t _spi_s_async_register_callback(struct _spi_s_async_dev *dev, const enum _spi_s_async_dev_cb_type cb_type,
+                                       const FUNC_PTR func);
+
+/**
+ * \brief Enable/disable SPI slave interrupt
+ *
+ * param[in] device The pointer to SPI slave device instance
+ * param[in] type The type of interrupt to disable/enable if applicable
+ * param[in] state Enable or disable
+ */
+void _spi_s_async_set_irq_state(struct _spi_s_async_dev *const device, const enum _spi_async_dev_cb_type type,
+                                const bool state);
+
+#ifdef __cplusplus
+}
+#endif
+
+/**@}*/
+#endif /* ifndef _HPL_SPI_S_ASYNC_H_INCLUDED */