Diff: main.cpp

Revision:

1:2b95f921e7f2

Parent:

0:33edf726559b

--- a/main.cpp	Wed Oct 07 13:04:40 2020 +0000
+++ b/main.cpp	Mon May 03 16:25:02 2021 +0000
@@ -7,29 +7,75 @@
 * GND         --- GND PmodMIC3
 * Vcc         --- VCC PmodMIC3
 *
+* L432KC A5   --- SS PmodOLEDrgb
+* L432KC D11  --- MOSI PmodOLEDrgb
+* L432KC D13  --- SCK PmodOLEDrgb
+* GND         --- GND PmodOLEDrgb
+* VCC         --- VCC PmodOLEDrgb
+* L432KC D10  --- D/C PmodOLEDrgb
+* L432KC D8   --- RES PmodOLEDrgb
+* VCC         --- VCCEN PmodOLEDrgb
+* VCC         --- PMODEN PmodOLEDrgb
+*
+* NUCLEO-L432KC
 * Pmod MIC3
-* https://reference.digilentinc.com/reference/pmod/pmodmic3/start
-* ADC7476
-* https://www.ti.com/lit/ds/symlink/adcs7476.pdf
+* Pmod OLEDrgb
 *
-* Timo Karppinen 7.10.2020
+* Reference - Timo Karppinen - Pmod_MIC3_Microphone_L432KC_OS6,
+* McLab10_OLEDrgb_L432KC_OS60_tk2
+*
 **************************************************/
 #include  "mbed.h"
+#include "Adafruit_SSD1331.h"
+#include "Adafruit_GFX.h"
 
 SPI spi(D11, D12, D13); // mosi, miso, sclk
+
+Adafruit_SSD1331 OLED(A5, D8, D10, D11, NC, D13); // cs, res, dc, mosi, (nc), sck
+
 DigitalOut mic3cs(D3);
+DigitalOut oledcs(A5);
+DigitalOut LED(D9);
+
+
+
+// Definition of colours on the OLED display
+#define Black 0x0000
+#define Blue 0x001F
+#define Red 0xF800
+#define Green 0x07E0
+#define Cyan 0x07FF
+#define Magenta 0xF81F
+#define Yellow 0xFFE0
+#define White 0xFFFF
 
 
 int raw = 0;        // 16 bits from MIC3
 int sound32bit = 0;
 int sound = 0;
-DigitalOut LED(D9);
+int delayCount = 0;
+int resetCount = 0;
+
+//Function declaration
+void delayCalc();
 
 
 int main()
 {
+    oledcs.write(0);
+       
+    OLED.begin(); // initialization of display object
+    OLED.clearScreen();
+    OLED.fillScreen(Black); // background screen in black
+    OLED.setTextColor(Cyan); // colour of text in cyan
+    OLED.setTextSize(2);
+    
+    ThisThread::sleep_for(1000ms);
+    
+    
     // Chip must be deselected
     mic3cs.write(1);
+    oledcs.write(1);
 
     // Setup the spi for 16 bit data, low steady state clock,
     // rising edge capture, with a 1MHz clock rate
@@ -38,7 +84,7 @@
     ThisThread::sleep_for(100ms);
     
     while(1){
-    // Select the device by seting chip select low
+    // Select the device by setting chip select low
     mic3cs.write(0);
     ThisThread::sleep_for(1ms);  // > 100 ns for the MAX31855
     
@@ -49,21 +95,51 @@
 
     // Deselect the device
     mic3cs.write(1);
-    printf("16 bits MIC3 = 0x%X", raw);
+    
     
-    // It is a two's complement for negative numbers. The sign is now on the 12th bit.
+    printf("16 bits MIC3 = 0x%X", raw);
     
     sound32bit = raw << 22; // 22 bits to the left to create 32 bit two's complement
     sound = sound32bit / 16777216; // 2 exp24 = 16 7777 216  means shifting 24 bits left without shifting the sign!
-    printf("   sound 12 bit = %d\n", sound);
-   
-    if(sound > 128){
-        LED.write(1);
+    
+    if (sound < 0){ // Converts negative values to positive.
+        sound = sound = -sound;
         }
-        else{
-            LED.write(0);
-            }
-    ThisThread::sleep_for(200ms);
-    }
+    
+    printf("   sound 12 bit = %d\n", sound);
+    
+    delayCalc();
+    
+}
 }
 
+void delayCalc(){ // Calculates how many times sound exceeds sound level 5
+    
+    if (sound => 5){
+        LED.write(1);
+        delayCount ++; // Add value to reset counter
+        resetCount = 0;
+    }
+    else {
+        resetCount ++; // Add value to reset counter
+        LED.write(0);
+        
+    }
+    if (sound < 5 && delayCount > 0 && resetCount > 9){ // Delay reset activates and prints the delay value
+        oledcs.write(0);
+        ThisThread::sleep_for(2ms);  // > minimum clock cycle time of 150ns for SSD1331
+        
+        OLED.clearScreen();
+        OLED.setCursor(0,0);
+        OLED.printf("Delay: %d\n", delayCount);
+        ThisThread::sleep_for(1000ms);
+        oledcs.write(1);
+        
+        delayCount = 0; // Resetting the variables
+        sound = 0;
+        raw = 0;
+        resetCount = 0;
+    }
+    
+    
+}