add SERCOM HAL Async library
Change-Id: I530a5bc5ee7e89149eb251bda0adf7963733d2ee
diff --git a/sysmoOCTSIM/hal/utils/include/utils_ringbuffer.h b/sysmoOCTSIM/hal/utils/include/utils_ringbuffer.h
new file mode 100644
index 0000000..401d557
--- /dev/null
+++ b/sysmoOCTSIM/hal/utils/include/utils_ringbuffer.h
@@ -0,0 +1,116 @@
+/**
+ * \file
+ *
+ * \brief Ringbuffer declaration.
+ *
+ * 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 _UTILS_RINGBUFFER_H_INCLUDED
+#define _UTILS_RINGBUFFER_H_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \addtogroup doc_driver_hal_utils_ringbuffer
+ *
+ * @{
+ */
+
+#include "compiler.h"
+#include "utils_assert.h"
+
+/**
+ * \brief Ring buffer element type
+ */
+struct ringbuffer {
+ uint8_t *buf; /** Buffer base address */
+ uint32_t size; /** Buffer size */
+ uint32_t read_index; /** Buffer read index */
+ uint32_t write_index; /** Buffer write index */
+};
+
+/**
+ * \brief Ring buffer init
+ *
+ * \param[in] rb The pointer to a ring buffer structure instance
+ * \param[in] buf Space to store the data
+ * \param[in] size The buffer length, must be aligned with power of 2
+ *
+ * \return ERR_NONE on success, or an error code on failure.
+ */
+int32_t ringbuffer_init(struct ringbuffer *const rb, void *buf, uint32_t size);
+
+/**
+ * \brief Get one byte from ring buffer, the user needs to handle the concurrent
+ * access on buffer via put/get/flush
+ *
+ * \param[in] rb The pointer to a ring buffer structure instance
+ * \param[in] data One byte space to store the read data
+ *
+ * \return ERR_NONE on success, or an error code on failure.
+ */
+int32_t ringbuffer_get(struct ringbuffer *const rb, uint8_t *data);
+
+/**
+ * \brief Put one byte to ring buffer, the user needs to handle the concurrent access
+ * on buffer via put/get/flush
+ *
+ * \param[in] rb The pointer to a ring buffer structure instance
+ * \param[in] data One byte data to be put into ring buffer
+ *
+ * \return ERR_NONE on success, or an error code on failure.
+ */
+int32_t ringbuffer_put(struct ringbuffer *const rb, uint8_t data);
+
+/**
+ * \brief Return the element number of ring buffer
+ *
+ * \param[in] rb The pointer to a ring buffer structure instance
+ *
+ * \return The number of elements in ring buffer [0, rb->size]
+ */
+uint32_t ringbuffer_num(const struct ringbuffer *const rb);
+
+/**
+ * \brief Flush ring buffer, the user needs to handle the concurrent access on buffer
+ * via put/get/flush
+ *
+ * \param[in] rb The pointer to a ring buffer structure instance
+ *
+ * \return ERR_NONE on success, or an error code on failure.
+ */
+uint32_t ringbuffer_flush(struct ringbuffer *const rb);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _UTILS_RINGBUFFER_H_INCLUDED */