Diff: signal_processing.cpp

Revision:

23:d938f87dd1ee

Child:

24:9ac1187f9012

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/signal_processing.cpp	Tue Dec 31 22:45:31 2019 +0000
@@ -0,0 +1,56 @@
+/**
+  ******************************************************************************
+  * @file    signal_processing.c
+  * @author  Brian Mazzeo
+  * @date    2020
+  * @brief   This file provides a set of code for signal processing in 487.
+  *          Parts are taken from example code from STMIcroelectronics
+  ******************************************************************************
+  * @attention
+  *          This code was specifically developed for BYU ECEn 487 course 
+  *          Introduction to Digital Signal Processing.
+  *
+  *
+  ******************************************************************************
+  */ 
+
+#include "mbed.h"
+#include "stm32746g_discovery_lcd.h"
+
+
+/**
+  * @brief  Process audio channel signals
+  * @param  L_channel: Pointer to Left channel data (float)
+  * @param  R_channel: Pointer to Right channel data (float)
+  * @param  Signal_Length: length of data to process
+  * @retval None
+  */
+void process_audio_channel_signals(float* L_channel, float* R_channel, uint16_t Signal_Length)
+{
+    char buf[40];
+    
+    BSP_LCD_SetTextColor(LCD_COLOR_CYAN);
+    sprintf(buf, "Processing Signals" );
+    BSP_LCD_DisplayStringAt(0, 150, (uint8_t *) buf, LEFT_MODE);
+    
+    uint16_t i;
+    float* L_chan_mem_address;
+    float* R_chan_mem_address;
+    float L_audio_value;
+    float R_audio_value;
+        
+    L_chan_mem_address = L_channel;
+    R_chan_mem_address = R_channel;
+    
+    for (i=0; i<Signal_Length; i++)
+   {
+        L_audio_value = *L_chan_mem_address;
+        *L_chan_mem_address = L_audio_value * 2;
+        L_chan_mem_address++;
+        
+        R_audio_value = *R_chan_mem_address;
+        *R_chan_mem_address = R_audio_value / 2;
+        R_chan_mem_address++;
+   }
+
+}