Initial import of NFC GNSS SDK project

2026-09-15 16:10:12 +08:00
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+/******************************************************************************
+ *
+ *  (C)Copyright ASRMicro. All Rights Reserved.
+ *
+ *  THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF ASRMicro.
+ *  The copyright notice above does not evidence any actual or intended
+ *  publication of such source code.
+ *  This Module contains Proprietary Information of ASRMicro and should be
+ *  treated as Confidential.
+ *  The information in this file is provided for the exclusive use of the
+ *  licensees of ASRMicro.
+ *  Such users have the right to use, modify, and incorporate this code into
+ *  products for purposes authorized by the license agreement provided they
+ *  include this notice and the associated copyright notice with any such
+ *  product.
+ *  The information in this file is provided "AS IS" without warranty.
+ *
+ ******************************************************************************/
+
+#pragma once
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+    /**
+    * @file acm_audio_tone.h
+    * @brief ASR audio tone API describes the process and functions used for tone generation in DSP.
+    */
+
+#define TONE_FREQUENCY_SET_MIN      (5)
+#define TONE_FREQUENCY_SET_MAX      (4000)
+
+    /** Start tone generation, set from ascii code.
+    * @param [in] ascii_code        ascii code of key
+    * @returns error code in int, non-zero on failure
+    */
+    int audio_tone_start_ascii(int32_t ascii_code);
+
+    /** Start tone generation, set from frequency.
+    * @param [in] frequency1        the first frequency
+    * @param [in] frequency2        the second frequency
+    * @returns error code in int, non-zero on failure
+    */
+    int audio_tone_start_frequency(int32_t frequency1, int32_t frequency2);
+
+    /** Set duration for tone generation.
+    * @param [in] ms                tone duration in microsecond
+    * @returns error code in int, non-zero on failure
+    */
+    int audio_tone_duration(int32_t ms);
+
+    /** Stop tone generation.
+    * @returns error code in int, non-zero on failure
+    */
+    int audio_tone_stop(void);
+
+#ifdef __cplusplus
+}
+#endif