Luke Cartwright / Mbed 2 deprecated ELEC2645_Project_el18loc_nearlythere

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Dependencies:   mbed

main.cpp@3:b7df72682b81, 2020-04-01 (annotated)

Committer:
lukeocarwright
Date:
Wed Apr 01 16:25:32 2020 +0000
Revision:
3:b7df72682b81
Parent:
2:07cef563acdf
Child:
4:9b7ea5528a5c
Produces single sin with variable frequency in uint format. Poor quality sound unsolved. Physical filter built but untested.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lukeocarwright 2:07cef563acdf 1 /*
eencae 0:b7f1f47bb26a 2 ELEC2645 Embedded Systems Project
eencae 0:b7f1f47bb26a 3 School of Electronic & Electrical Engineering
eencae 0:b7f1f47bb26a 4 University of Leeds
eencae 0:b7f1f47bb26a 5 2019/20
eencae 0:b7f1f47bb26a 6
lukeocarwright 1:766a293c9b07 7 Name: Luke Cartwright
lukeocarwright 1:766a293c9b07 8 Username: el18loc
lukeocarwright 1:766a293c9b07 9 Student ID Number: 201225242
lukeocarwright 2:07cef563acdf 10 Start Date: 06/02/2020
lukeocarwright 2:07cef563acdf 11 Last Edited: 12/03/2020
eencae 0:b7f1f47bb26a 12 */
eencae 0:b7f1f47bb26a 13
lukeocarwright 2:07cef563acdf 14 // Includes
eencae 0:b7f1f47bb26a 15 #include "mbed.h"
eencae 0:b7f1f47bb26a 16 #include "Gamepad.h"
eencae 0:b7f1f47bb26a 17 #include "N5110.h"
eencae 0:b7f1f47bb26a 18
lukeocarwright 2:07cef563acdf 19 // Objects
eencae 0:b7f1f47bb26a 20 Gamepad pad;
eencae 0:b7f1f47bb26a 21 N5110 lcd;
lukeocarwright 2:07cef563acdf 22 Timer t;
lukeocarwright 2:07cef563acdf 23
lukeocarwright 2:07cef563acdf 24 Serial pc(USBTX, USBRX);
lukeocarwright 2:07cef563acdf 25
lukeocarwright 2:07cef563acdf 26 //Functions
lukeocarwright 2:07cef563acdf 27 void startup();
lukeocarwright 2:07cef563acdf 28 void squareWave();
lukeocarwright 2:07cef563acdf 29 void wavetable();
lukeocarwright 2:07cef563acdf 30 void sinspeak();
lukeocarwright 2:07cef563acdf 31
lukeocarwright 2:07cef563acdf 32 //Arrays for startup
lukeocarwright 2:07cef563acdf 33 const int notes[8] = {330,0,330,294,330,247,294,392};
lukeocarwright 2:07cef563acdf 34 const int duration[8] = {4,8,4,8,8,4,8,4};
lukeocarwright 2:07cef563acdf 35 const char CART[4] = {'C','A','R','T'};
lukeocarwright 2:07cef563acdf 36 const char SYNTH[5] = {'S','Y','N','T','H'};
lukeocarwright 2:07cef563acdf 37
lukeocarwright 2:07cef563acdf 38 //Global Variables
lukeocarwright 3:b7df72682b81 39 volatile unsigned short o[4096];
eencae 0:b7f1f47bb26a 40
eencae 0:b7f1f47bb26a 41 int main()
eencae 0:b7f1f47bb26a 42 {
lukeocarwright 2:07cef563acdf 43 printf("RUNNING CODE \n");
lukeocarwright 2:07cef563acdf 44 startup();
lukeocarwright 2:07cef563acdf 45 wavetable();
lukeocarwright 2:07cef563acdf 46 pad.leds_on();
lukeocarwright 2:07cef563acdf 47 sinspeak();
lukeocarwright 2:07cef563acdf 48 pad.leds_off();
lukeocarwright 3:b7df72682b81 49 for (int rep=0; rep<10; rep++) {
lukeocarwright 3:b7df72682b81 50 sinspeak();
lukeocarwright 2:07cef563acdf 51 }
lukeocarwright 2:07cef563acdf 52 // squareWave();
lukeocarwright 2:07cef563acdf 53 }
lukeocarwright 2:07cef563acdf 54
lukeocarwright 2:07cef563acdf 55
lukeocarwright 2:07cef563acdf 56 void startup()
lukeocarwright 2:07cef563acdf 57 {
lukeocarwright 2:07cef563acdf 58 pad.init(); //initiate Gamepad
lukeocarwright 2:07cef563acdf 59 pad.leds_on(); //turn LEDS on to show starting up
lukeocarwright 3:b7df72682b81 60 printf("Initialising Pad\n");
lukeocarwright 2:07cef563acdf 61 pad.play_melody(8,notes,duration,108,0); //play startup tune
lukeocarwright 2:07cef563acdf 62 lcd.init(); //intitates screen
lukeocarwright 2:07cef563acdf 63 lcd.clear();
lukeocarwright 2:07cef563acdf 64 lcd.setContrast(0.4f); //contrast setting
lukeocarwright 2:07cef563acdf 65 lcd.inverseMode(); //puts screen in -ve
lukeocarwright 2:07cef563acdf 66 //positions for CART SYNTH
lukeocarwright 2:07cef563acdf 67 const int x = 10;
lukeocarwright 2:07cef563acdf 68 const int y = 2;
lukeocarwright 2:07cef563acdf 69 const int a = 40;
lukeocarwright 2:07cef563acdf 70 const int b = 4;
lukeocarwright 2:07cef563acdf 71 //Prints CART SYNTH to display
lukeocarwright 2:07cef563acdf 72 lcd.printString(CART,x,y);
lukeocarwright 2:07cef563acdf 73 lcd.printString(SYNTH,a,b);
lukeocarwright 2:07cef563acdf 74 lcd.refresh();
lukeocarwright 2:07cef563acdf 75 wait_ms(1800); //timer to allow theme to play out
lukeocarwright 2:07cef563acdf 76 lcd.clear();
lukeocarwright 2:07cef563acdf 77 lcd.refresh(); //sets clear screen
lukeocarwright 2:07cef563acdf 78 pad.leds_off(); //turns of leds to show ready
eencae 0:b7f1f47bb26a 79 }
eencae 0:b7f1f47bb26a 80
lukeocarwright 2:07cef563acdf 81
lukeocarwright 2:07cef563acdf 82 void wavetable()
lukeocarwright 2:07cef563acdf 83 {
lukeocarwright 2:07cef563acdf 84 int samples= 4096;
lukeocarwright 2:07cef563acdf 85 float sinfl[samples];
lukeocarwright 2:07cef563acdf 86 int sinf[samples];
lukeocarwright 2:07cef563acdf 87
lukeocarwright 2:07cef563acdf 88 pad.leds_on(); //shows computating
lukeocarwright 2:07cef563acdf 89 printf("Generating Wavetable \n");
lukeocarwright 2:07cef563acdf 90 wait_ms(500); //shows reaches stage
lukeocarwright 2:07cef563acdf 91
lukeocarwright 2:07cef563acdf 92 float ifl=0.0; //creates fl type incramenter
lukeocarwright 2:07cef563acdf 93
lukeocarwright 2:07cef563acdf 94 for (int i=0; i<4096; i++) {
lukeocarwright 3:b7df72682b81 95 sinfl[i] = 65536.0f*sin(2.0f*PI*(ifl/4096.0f));
lukeocarwright 3:b7df72682b81 96 sinf[i] = sinfl[i];
lukeocarwright 3:b7df72682b81 97 o[i]= sinf[i]+32767; //generates wave table in uint
lukeocarwright 3:b7df72682b81 98 // printf("o[i]= %u \n", o[i]); // Used for Debug
lukeocarwright 2:07cef563acdf 99 ifl=i+1.0f;
lukeocarwright 2:07cef563acdf 100 }
lukeocarwright 2:07cef563acdf 101 pad.leds_off();
lukeocarwright 2:07cef563acdf 102 }
lukeocarwright 3:b7df72682b81 103
lukeocarwright 3:b7df72682b81 104
lukeocarwright 2:07cef563acdf 105 void sinspeak ()
lukeocarwright 2:07cef563acdf 106 {
lukeocarwright 2:07cef563acdf 107 float f1=440.0;
lukeocarwright 2:07cef563acdf 108 float i=0;
lukeocarwright 3:b7df72682b81 109 unsigned short v=0;
lukeocarwright 2:07cef563acdf 110 int inc=0;
lukeocarwright 2:07cef563acdf 111 pad.reset_buttons();
lukeocarwright 2:07cef563acdf 112 f1 = pad.read_pot1();
lukeocarwright 3:b7df72682b81 113 f1 = 440.0f+440.0f*f1;
lukeocarwright 3:b7df72682b81 114 //printf("f1= %f \n",f1); // Used for Debug
lukeocarwright 2:07cef563acdf 115
lukeocarwright 2:07cef563acdf 116 while (inc<3000) {
lukeocarwright 2:07cef563acdf 117 int inti = i;
lukeocarwright 2:07cef563acdf 118 v = o[inti];
lukeocarwright 3:b7df72682b81 119 //printf("OUTPUT: %u \n", v);
lukeocarwright 3:b7df72682b81 120 pad.write_u16(v);
lukeocarwright 3:b7df72682b81 121 wait_us(230); //fs= 4k Ts=250us
lukeocarwright 3:b7df72682b81 122
lukeocarwright 3:b7df72682b81 123 i = i + ((4096.0f*f1)/4000.0f); //i+((samples*f)*Ts)
lukeocarwright 2:07cef563acdf 124 if (i>=4096.0f) {
lukeocarwright 2:07cef563acdf 125 i=i-4096.0f;
lukeocarwright 3:b7df72682b81 126 }
lukeocarwright 3:b7df72682b81 127 else {
lukeocarwright 3:b7df72682b81 128 wait_us(3);
lukeocarwright 2:07cef563acdf 129 }
lukeocarwright 2:07cef563acdf 130 inc++;
lukeocarwright 2:07cef563acdf 131 }
lukeocarwright 2:07cef563acdf 132 }
lukeocarwright 2:07cef563acdf 133
lukeocarwright 2:07cef563acdf 134 void squareWave()
lukeocarwright 2:07cef563acdf 135 {
lukeocarwright 2:07cef563acdf 136 // defines local variables
lukeocarwright 2:07cef563acdf 137 float v = 0.0;
lukeocarwright 2:07cef563acdf 138 float f = 440.0;
lukeocarwright 2:07cef563acdf 139 float p1 = 0;
lukeocarwright 2:07cef563acdf 140 // continual loop for square production
lukeocarwright 2:07cef563acdf 141 while (1) {
lukeocarwright 2:07cef563acdf 142 pad.write_dac(v); //wite out value (1/0)
lukeocarwright 2:07cef563acdf 143 //Statements for switch of out
lukeocarwright 2:07cef563acdf 144 if (v == 0.0f) {
lukeocarwright 2:07cef563acdf 145 v=0.1;
lukeocarwright 2:07cef563acdf 146 } else {
lukeocarwright 2:07cef563acdf 147 v=0.0;
lukeocarwright 2:07cef563acdf 148 }
lukeocarwright 2:07cef563acdf 149 p1 = pad.read_pot1(); //read pot 1 value
lukeocarwright 2:07cef563acdf 150 f = 440 + 440*p1; //convert to freq (A4->A5)
lukeocarwright 2:07cef563acdf 151 float T=1/f; //calc Period of wave
lukeocarwright 2:07cef563acdf 152 wait(T); //timer for switch value (T)
lukeocarwright 2:07cef563acdf 153 }
lukeocarwright 2:07cef563acdf 154
lukeocarwright 2:07cef563acdf 155 }