Opensource ML embedded evaluation kit

Change-Id: I12e807f19f5cacad7cef82572b6dd48252fd61fd
diff --git a/source/application/hal/include/data_acq.h b/source/application/hal/include/data_acq.h
new file mode 100644
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+++ b/source/application/hal/include/data_acq.h
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+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef DATA_ACQ_H
+#define DATA_ACQ_H
+
+/**
+ * This file is the top level abstraction for the data acquisition module.
+ **/
+#include <stdint.h>
+
+/* Structure to encompass the data acquisition module and it's methods. */
+typedef struct data_acquisition_module {
+    int inited;                 /**< initialised or not. */
+    char system_name[8];        /**< name(s) of the channel in use. */
+    int (* system_init)(void);  /**< channel initialisation function. */
+
+    /* Function to go and check if there are any events that require handling. */
+    int (* get_input)(char *user_input, int size);
+} data_acq_module;
+
+/**
+ * @brief           Initialise the data acquisition channel: goes and
+ *                  sets the required channel up for usage.
+ * @param[in,out]   module  Pointer to a pre-allocated data
+ *                          acquisition structure object.
+ * @return          0 if successful, error code otherwise.
+ **/
+int data_acq_channel_init(data_acq_module *module);
+
+/**
+ * @brief           Releases the data acquisition channel.
+ * @param[in,out]   module  Pointer to a pre-allocated data
+ *                          acquisition structure object.
+ * @return          0 if successful, error code otherwise.
+ **/
+int data_acq_channel_release(data_acq_module *module);
+
+#endif /* DATA_ACQ_H */