Diff: main.cpp

Revision:

0:36a62c23e60c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 26 14:51:48 2015 +0000
@@ -0,0 +1,77 @@
+#include "main.h"
+
+LCD_DISCO_F746NG lcd;
+
+int16_t audio_in_buffer[BufferSize];
+__IO bool audio_in_buffer_captured = false;
+__IO int32_t audio_in_buffer_offset = 0;
+__IO int32_t audio_in_buffer_length = 0;
+
+void init_audio_in()
+{
+    if (BSP_AUDIO_IN_Init(INPUT_DEVICE_INPUT_LINE_1, AudioInVolume, SamplingFreq) == AUDIO_ERROR)
+        error_trap();
+
+    NVIC_SetVector(AUDIO_IN_SAIx_DMAx_IRQ, (uint32_t)&AUDIO_IN_SAIx_DMAx_IRQHandler);
+}
+
+void record_audio_in()
+{
+    if (BSP_AUDIO_IN_Record((uint16_t*)&audio_in_buffer[0], BufferByteSize / 2) == AUDIO_ERROR)
+        error_trap();
+}
+
+
+int main()
+{
+    char strbuf[64];
+    uint16_t width, height, height_2, graph_height;
+    double y_factor;
+
+    lcd.Clear(LCD_COLOR_BLACK);
+    lcd.SetBackColor(LCD_COLOR_BLACK);
+    lcd.SetTextColor(LCD_COLOR_WHITE);
+    lcd.SetFont(&Font12);
+    sprintf(strbuf, "SamplingFreq: %d Hz", SamplingFreq);
+    lcd.DisplayStringAt(0, 0, (uint8_t *)strbuf, LEFT_MODE);
+
+    width = lcd.GetXSize() - 1;
+    height = lcd.GetYSize() - 1;
+    graph_height = height - LINE(1);
+    height_2 = graph_height / 2;
+    y_factor = (graph_height * 0.5 * AudioInGraphYFactor) / 32768.0;
+
+    init_audio_in();
+    record_audio_in();
+    
+    while(1) {
+        if (audio_in_buffer_captured) {
+            lcd.SetTextColor(LCD_COLOR_BLACK);
+            lcd.FillRect(0, LINE(1), width, graph_height);
+            lcd.SetTextColor(LCD_COLOR_WHITE);
+
+            for (int32_t i = audio_in_buffer_offset, j = 0; j < audio_in_buffer_length / 2 - 1 && j < width - 1; j++) {
+                uint16_t k = (uint16_t)j;
+                int16_t y1 =  (int16_t)(audio_in_buffer[i + 0] * y_factor);
+                int16_t y2 =  (int16_t)(audio_in_buffer[i + 4] * y_factor);
+
+                if (y1 > height_2)
+                    y1 = height_2;
+                else if (y1 < -height_2)
+                    y1 = -height_2;
+
+                if (y2 > height_2)
+                    y2 = height_2;
+                else if (y2 < -height_2)
+                    y2 = -height_2;
+
+                lcd.DrawLine(k, (uint16_t)(height_2 + y1 + LINE(1)), k + 1, (uint16_t)(height_2 + y2 + LINE(1)));
+
+                i += 4;
+            }
+            audio_in_buffer_captured = false;
+        }
+
+        wait_ms(AudioInLCDInterval);
+    }
+}
\ No newline at end of file