1 files changed, 9 insertions, 0 deletions
diff --git a/include/sound.h b/include/sound.h
index a06ab85..155e1b4 100644
--- a/include/sound.h
+++ b/include/sound.h
@@ -30,6 +30,15 @@ struct sound_codec_info {
 };
 
 /*
+ * Generates square wave sound data for 1 second
+ *
+ * @param data          data buffer pointer
+ * @param size          size of the buffer
+ * @param freq          frequency of the wave
+ */
+void sound_create_square_wave(unsigned short *data, int size, uint32_t freq);
+
+/*
  * Initialises audio sub system
  * @param blob	Pointer of device tree node or NULL if none.
  * @return	int value 0 for success, -1 for error