Diff: main.cpp

Revision:

2:07cef563acdf

Parent:

1:766a293c9b07

Child:

3:b7df72682b81

--- a/main.cpp	Thu Feb 06 12:59:16 2020 +0000
+++ b/main.cpp	Mon Mar 30 15:03:36 2020 +0000
@@ -1,4 +1,4 @@
-/* 
+/*
 ELEC2645 Embedded Systems Project
 School of Electronic & Electrical Engineering
 University of Leeds
@@ -7,21 +7,172 @@
 Name: Luke Cartwright
 Username: el18loc
 Student ID Number: 201225242
-Date: 06/02/2019
+Start Date: 06/02/2020
+Last Edited: 12/03/2020
 */
 
-// includes
+// Includes
 #include "mbed.h"
 #include "Gamepad.h"
 #include "N5110.h"
 
-
-// objects
+// Objects
 Gamepad pad;
 N5110 lcd;
+Timer t;
+
+Serial pc(USBTX, USBRX);
+
+//Functions
+void startup();
+void squareWave();
+void wavetable();
+void sinspeak();
+
+//Arrays for startup
+const int notes[8] = {330,0,330,294,330,247,294,392};
+const int duration[8] = {4,8,4,8,8,4,8,4};
+const char CART[4] = {'C','A','R','T'};
+const char SYNTH[5] = {'S','Y','N','T','H'};
+
+//Global Variables
+volatile int o[4096];
 
 int main()
 {
+    printf("RUNNING CODE \n");
+    startup();
+    wavetable();
+    pad.leds_on();
+    sinspeak();
+    pad.leds_off();
+    printf("Waiting for button press \n");
+    while (1) {
+         int a = pad.A_pressed();
+        if (pad.A_pressed()==true) {
+            printf("A Pressed \n");
+            sinspeak();
+        }
+        //wait_ms(10);
+        printf("A= %d \n", a);
+    }
     
+//  squareWave();
+}
+
+
+void startup()
+{
+    pad.init(); //initiate Gamepad
+    pad.leds_on(); //turn LEDS on to show starting up
+    pad.play_melody(8,notes,duration,108,0); //play startup tune
+    printf("Initialising Pad\n");
+    lcd.init(); //intitates screen
+    lcd.clear();
+    lcd.setContrast(0.4f); //contrast setting
+    lcd.inverseMode(); //puts screen in -ve
+    //positions for CART SYNTH
+    const int x = 10;
+    const int y = 2;
+    const int a = 40;
+    const int b = 4;
+    //Prints CART SYNTH to display
+    lcd.printString(CART,x,y);
+    lcd.printString(SYNTH,a,b);
+    lcd.refresh();
+    wait_ms(1800); //timer to allow theme to play out
+    lcd.clear();
+    lcd.refresh(); //sets clear screen
+    pad.leds_off(); //turns of leds to show ready
 }
 
+
+
+
+void wavetable()
+{
+    int samples= 4096;
+    float sinfl[samples];
+    int sinf[samples];
+
+    pad.leds_on(); //shows computating
+    printf("Generating Wavetable \n");
+    wait_ms(500); //shows reaches stage
+
+    float ifl=0.0; //creates fl type incramenter
+
+    for (int i=0; i<4096; i++) {
+        sinfl[i] = 6553500.0f*sin(2.0f*PI*(ifl/4096.0f));
+        sinf[i] = sinfl[i]/100.0f;
+        o[i]= sinf[i]+32767; //generates wave table
+        //printf("o[i]= %d",o[i], "\n"); // Used for Debug
+        ifl=i+1.0f;
+    }
+    pad.leds_off();
+}
+void sinspeak ()
+{
+    float f=440.0;
+    float f1=440.0;
+    float f2=1.0;
+    float i=0;
+    //int i1=0;
+    float i2=0;
+    int v=0;
+    int inc=0;
+    pad.reset_buttons();
+    f1 = pad.read_pot1();
+    //f2 = pad.read_pot2();
+    f1 = 440.0f+440.0f*f;
+    f2 = 5.0f*f2;
+    printf("f1= %f \n",f1); // Used for Debug
+    printf("f2= %f \n",f2);
+
+    while (inc<3000) {
+        int inti = i;
+        v = o[inti];
+        printf("OUTPUT: %d \n", v);
+        //pad.write_u16(v);
+        wait_us(190); //200us but 150 for delay (uncalculated)
+        
+        i2 = i2 + ((4096*f2)/5000); //i2+((samples*f)*Ts)
+        if (i2>=4096) {
+            i2=i2-4096;
+        }
+        int inti2 = i2;
+        int x = (o[inti2]/6554)-5; //(amp/6554)-offset =sin10f
+        float xfloat = x;
+        printf("x= %d \n", x); // Used for Debug
+        f = f1 + xfloat;
+        
+        i = i + ((4096.0f*f)/5000.0f); //i+((samples*f)*Ts)
+        if (i>=4096.0f) {
+            i=i-4096.0f;
+            }
+            
+        inc++;
+    }
+}
+
+void squareWave()
+{
+    // defines local variables
+    float v = 0.0;
+    float f = 440.0;
+    float p1 = 0;
+    // continual loop for square production
+    while (1) {
+        pad.write_dac(v); //wite out value (1/0)
+        //Statements for switch of out
+        if (v == 0.0f) {
+            v=0.1;
+        } else {
+            v=0.0;
+        }
+        p1 = pad.read_pot1(); //read pot 1 value
+        f = 440 + 440*p1; //convert to freq (A4->A5)
+        float T=1/f; //calc Period of wave
+        wait(T); //timer for switch value (T)
+    }
+
+}