Luke Cartwright / Mbed 2 deprecated ELEC2645_Project_el18loc_nearlythere

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Dependencies:   mbed

main.cpp@5:e785b9cd58c9, 2020-05-03 (annotated)

Committer:
lukeocarwright
Date:
Sun May 03 13:01:59 2020 +0000
Revision:
5:e785b9cd58c9
Parent:
4:9b7ea5528a5c
Child:
6:3a4e9ce12911
Strip back of functions due to hardwaare change (created own physical gamepad3). Inclusion of main menu (yet to be user activated)

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 4:9b7ea5528a5c 11 Last Edited: 07/04/2020
eencae 0:b7f1f47bb26a 12 */
eencae 0:b7f1f47bb26a 13
lukeocarwright 5:e785b9cd58c9 14 /* TO DO:
lukeocarwright 5:e785b9cd58c9 15 string continues at line ends
lukeocarwright 5:e785b9cd58c9 16 LEDS INSTALL
lukeocarwright 5:e785b9cd58c9 17 STICK INSTALL
lukeocarwright 5:e785b9cd58c9 18
lukeocarwright 5:e785b9cd58c9 19 */
lukeocarwright 2:07cef563acdf 20 // Includes
eencae 0:b7f1f47bb26a 21 #include "mbed.h"
eencae 0:b7f1f47bb26a 22 #include "Gamepad.h"
eencae 0:b7f1f47bb26a 23 #include "N5110.h"
eencae 0:b7f1f47bb26a 24
lukeocarwright 2:07cef563acdf 25 // Objects
eencae 0:b7f1f47bb26a 26 Gamepad pad;
eencae 0:b7f1f47bb26a 27 N5110 lcd;
lukeocarwright 4:9b7ea5528a5c 28 Ticker down;
lukeocarwright 4:9b7ea5528a5c 29 Ticker period;
lukeocarwright 4:9b7ea5528a5c 30
lukeocarwright 4:9b7ea5528a5c 31 DigitalOut rca(PTC4);
lukeocarwright 2:07cef563acdf 32
lukeocarwright 2:07cef563acdf 33 Serial pc(USBTX, USBRX);
lukeocarwright 2:07cef563acdf 34
lukeocarwright 2:07cef563acdf 35 //Functions
lukeocarwright 2:07cef563acdf 36 void startup();
lukeocarwright 5:e785b9cd58c9 37 //void squareWave();
lukeocarwright 2:07cef563acdf 38 void wavetable();
lukeocarwright 5:e785b9cd58c9 39 int mainmenu();
lukeocarwright 5:e785b9cd58c9 40 void printmainmenu();
lukeocarwright 4:9b7ea5528a5c 41 //void sinspeak();
lukeocarwright 5:e785b9cd58c9 42 //void down_isr();
lukeocarwright 5:e785b9cd58c9 43 //void up_isr();
lukeocarwright 2:07cef563acdf 44
lukeocarwright 2:07cef563acdf 45 //Arrays for startup
lukeocarwright 5:e785b9cd58c9 46 char CARTSYNTH[9] = {'C','A','R','T','S','Y','N','T','H'};
lukeocarwright 5:e785b9cd58c9 47 char MAIN_MENU[9] = {'M','A','I','N',' ','M','E','N','U'};
lukeocarwright 5:e785b9cd58c9 48 char Waveforms[9] = {'W','a','v','e','f','o','r','m','s'};
lukeocarwright 5:e785b9cd58c9 49 char Credits[7] = {'C','r','e','d','i','t','s'};
lukeocarwright 2:07cef563acdf 50
lukeocarwright 2:07cef563acdf 51 //Global Variables
lukeocarwright 4:9b7ea5528a5c 52 volatile double wavtable[4096]; //Wavetable array
lukeocarwright 4:9b7ea5528a5c 53 // all times drastically slowed to attempt debugging in teraterm
lukeocarwright 4:9b7ea5528a5c 54 float g_period = 0.002;
lukeocarwright 4:9b7ea5528a5c 55 float g_unused= g_period*1000000.0f;
lukeocarwright 4:9b7ea5528a5c 56 int g_period_us=g_unused;
lukeocarwright 4:9b7ea5528a5c 57 volatile uint64_t g_uptime_us = g_period_us/2; // placeholder value
lukeocarwright 4:9b7ea5528a5c 58 //isr interrupt flags
lukeocarwright 4:9b7ea5528a5c 59 volatile int g_upflag=1;
lukeocarwright 4:9b7ea5528a5c 60 volatile int g_downflag=1;
eencae 0:b7f1f47bb26a 61
eencae 0:b7f1f47bb26a 62 int main()
eencae 0:b7f1f47bb26a 63 {
lukeocarwright 2:07cef563acdf 64 printf("RUNNING CODE \n");
lukeocarwright 4:9b7ea5528a5c 65 startup(); //initialises board and displays start screen
lukeocarwright 4:9b7ea5528a5c 66 wavetable(); //generates wavtable array
lukeocarwright 5:e785b9cd58c9 67 mainmenu(); //generates main menu
lukeocarwright 4:9b7ea5528a5c 68 //pad.leds_on();
lukeocarwright 5:e785b9cd58c9 69 //squareWave(); //generates pulse wave modulated by sin wave
lukeocarwright 4:9b7ea5528a5c 70 //pad.leds_off();
lukeocarwright 4:9b7ea5528a5c 71 //sinspeak();
lukeocarwright 2:07cef563acdf 72 }
lukeocarwright 2:07cef563acdf 73
lukeocarwright 2:07cef563acdf 74
lukeocarwright 2:07cef563acdf 75 void startup()
lukeocarwright 2:07cef563acdf 76 {
lukeocarwright 2:07cef563acdf 77 pad.init(); //initiate Gamepad
lukeocarwright 2:07cef563acdf 78 pad.leds_on(); //turn LEDS on to show starting up
lukeocarwright 3:b7df72682b81 79 printf("Initialising Pad\n");
lukeocarwright 2:07cef563acdf 80 lcd.init(); //intitates screen
lukeocarwright 2:07cef563acdf 81 lcd.clear();
lukeocarwright 4:9b7ea5528a5c 82 lcd.setContrast(0.5); //contrast setting
lukeocarwright 2:07cef563acdf 83 lcd.inverseMode(); //puts screen in -ve
lukeocarwright 5:e785b9cd58c9 84 //position for CARTSYNTH
lukeocarwright 5:e785b9cd58c9 85 const int x = 6;
lukeocarwright 2:07cef563acdf 86 const int y = 2;
lukeocarwright 2:07cef563acdf 87 //Prints CART SYNTH to display
lukeocarwright 5:e785b9cd58c9 88 lcd.printString(CARTSYNTH,x,y);
lukeocarwright 2:07cef563acdf 89 lcd.refresh();
lukeocarwright 2:07cef563acdf 90 wait_ms(1800); //timer to allow theme to play out
lukeocarwright 2:07cef563acdf 91 lcd.clear();
lukeocarwright 2:07cef563acdf 92 lcd.refresh(); //sets clear screen
lukeocarwright 2:07cef563acdf 93 pad.leds_off(); //turns of leds to show ready
eencae 0:b7f1f47bb26a 94 }
eencae 0:b7f1f47bb26a 95
lukeocarwright 2:07cef563acdf 96
lukeocarwright 2:07cef563acdf 97 void wavetable()
lukeocarwright 2:07cef563acdf 98 {
lukeocarwright 4:9b7ea5528a5c 99 double sin_d[4096];
lukeocarwright 2:07cef563acdf 100
lukeocarwright 4:9b7ea5528a5c 101 pad.leds_on(); //shows computating (debug)
lukeocarwright 2:07cef563acdf 102 printf("Generating Wavetable \n");
lukeocarwright 2:07cef563acdf 103
lukeocarwright 2:07cef563acdf 104 for (int i=0; i<4096; i++) {
lukeocarwright 4:9b7ea5528a5c 105 sin_d[i] = 0.5f*sin(2.0f*PI*(i/4096.0f));
lukeocarwright 4:9b7ea5528a5c 106 wavtable[i]= sin_d[i]+0.5; //generates wave table 0<1 in double
lukeocarwright 4:9b7ea5528a5c 107 //printf("wav[i]= %f \n", wavtable[i]); // Used for Debug
lukeocarwright 2:07cef563acdf 108 }
lukeocarwright 2:07cef563acdf 109 pad.leds_off();
lukeocarwright 2:07cef563acdf 110 }
lukeocarwright 3:b7df72682b81 111
lukeocarwright 5:e785b9cd58c9 112 int mainmenu()
lukeocarwright 5:e785b9cd58c9 113 {
lukeocarwright 5:e785b9cd58c9 114 printmainmenu();
lukeocarwright 3:b7df72682b81 115
lukeocarwright 5:e785b9cd58c9 116
lukeocarwright 5:e785b9cd58c9 117
lukeocarwright 5:e785b9cd58c9 118 return(1);
lukeocarwright 5:e785b9cd58c9 119 }
lukeocarwright 5:e785b9cd58c9 120
lukeocarwright 5:e785b9cd58c9 121 void printmainmenu()
lukeocarwright 5:e785b9cd58c9 122 {
lukeocarwright 5:e785b9cd58c9 123 printf("Printing Main Menu \n");
lukeocarwright 5:e785b9cd58c9 124 lcd.clear();
lukeocarwright 5:e785b9cd58c9 125 lcd.printString(MAIN_MENU,3,0);
lukeocarwright 5:e785b9cd58c9 126 lcd.printString(Waveforms,3,1);
lukeocarwright 5:e785b9cd58c9 127 lcd.printString(Credits,3,2);
lukeocarwright 5:e785b9cd58c9 128 lcd.refresh();
lukeocarwright 5:e785b9cd58c9 129
lukeocarwright 5:e785b9cd58c9 130
lukeocarwright 5:e785b9cd58c9 131 }
lukeocarwright 5:e785b9cd58c9 132 /*
lukeocarwright 4:9b7ea5528a5c 133 void squareWave()
lukeocarwright 4:9b7ea5528a5c 134 {
lukeocarwright 4:9b7ea5528a5c 135 printf("Generating SIN PWM \n");
lukeocarwright 4:9b7ea5528a5c 136
lukeocarwright 4:9b7ea5528a5c 137 int i=0; //int based iterator
lukeocarwright 4:9b7ea5528a5c 138 float ifl=0; //float based itterator
lukeocarwright 4:9b7ea5528a5c 139 float f=50; //frequency of sin wave produced
lukeocarwright 4:9b7ea5528a5c 140 period.attach_us(&up_isr,g_period_us); //ticker to write 1 to rca
lukeocarwright 4:9b7ea5528a5c 141 down.attach_us(&down_isr,g_uptime_us); //ticker to write 0 to rca
lukeocarwright 5:e785b9cd58c9 142
lukeocarwright 5:e785b9cd58c9 143
lukeocarwright 4:9b7ea5528a5c 144 printf("g_period_us: %d \n", g_period_us);
lukeocarwright 4:9b7ea5528a5c 145 printf("sin Frequency: %f \n", f);
lukeocarwright 4:9b7ea5528a5c 146
lukeocarwright 4:9b7ea5528a5c 147 while (1) { //continual loop for pulse production
lukeocarwright 4:9b7ea5528a5c 148 float dutyratio = wavtable[i]; //calcualtes duty ratio of pulse
lukeocarwright 5:e785b9cd58c9 149
lukeocarwright 4:9b7ea5528a5c 150 g_uptime_us= dutyratio*g_period_us; //calculates duty ratio in usecs
lukeocarwright 4:9b7ea5528a5c 151 if (g_uptime_us<1) {
lukeocarwright 4:9b7ea5528a5c 152 g_uptime_us=g_period_us/100;
lukeocarwright 4:9b7ea5528a5c 153 } //sets to be value for timebeing to eliminate 0 error
lukeocarwright 4:9b7ea5528a5c 154 //float f=440*(pad.read_pot1()+1); //removed for simplification
lukeocarwright 5:e785b9cd58c9 155
lukeocarwright 4:9b7ea5528a5c 156 if (g_upflag==0) {
lukeocarwright 5:e785b9cd58c9 157
lukeocarwright 4:9b7ea5528a5c 158 ifl = ifl + (4096*f*g_period); //once rca=1 itterate sin function
lukeocarwright 4:9b7ea5528a5c 159 if (ifl>4096) {
lukeocarwright 4:9b7ea5528a5c 160 ifl= ifl-4096;
lukeocarwright 4:9b7ea5528a5c 161 }
lukeocarwright 4:9b7ea5528a5c 162 i=ifl;
lukeocarwright 5:e785b9cd58c9 163
lukeocarwright 4:9b7ea5528a5c 164 g_upflag=1; //reset flag
lukeocarwright 4:9b7ea5528a5c 165 //printf("iterate i: i= %d, ifl= %f \n", i, ifl);
lukeocarwright 4:9b7ea5528a5c 166 }
lukeocarwright 5:e785b9cd58c9 167
lukeocarwright 4:9b7ea5528a5c 168 //printf("DR: %f \n",dutyratio);
lukeocarwright 4:9b7ea5528a5c 169 //printf("sleep \n");
lukeocarwright 4:9b7ea5528a5c 170 sleep(); //sleeps till next isr
lukeocarwright 4:9b7ea5528a5c 171 }
lukeocarwright 4:9b7ea5528a5c 172 }
lukeocarwright 4:9b7ea5528a5c 173
lukeocarwright 4:9b7ea5528a5c 174 void down_isr() //sets rca to 0
lukeocarwright 4:9b7ea5528a5c 175 {
lukeocarwright 4:9b7ea5528a5c 176 //printf("downISR \n");
lukeocarwright 4:9b7ea5528a5c 177 if (g_downflag==0) {//stops error trigger
lukeocarwright 4:9b7ea5528a5c 178 rca.write(0);
lukeocarwright 4:9b7ea5528a5c 179 g_downflag=1;
lukeocarwright 4:9b7ea5528a5c 180 g_uptime_us= g_uptime_us+g_period_us; // eliminates it calling if =0
lukeocarwright 4:9b7ea5528a5c 181 //printf("0 \n");//print only in while v. slow freguency
lukeocarwright 4:9b7ea5528a5c 182 }
lukeocarwright 4:9b7ea5528a5c 183 }
lukeocarwright 4:9b7ea5528a5c 184
lukeocarwright 4:9b7ea5528a5c 185 void up_isr() //sets rca=1
lukeocarwright 4:9b7ea5528a5c 186 {
lukeocarwright 4:9b7ea5528a5c 187 //printf("upISR \n");
lukeocarwright 4:9b7ea5528a5c 188 rca.write(1);
lukeocarwright 4:9b7ea5528a5c 189 down.attach_us(&down_isr,g_uptime_us); //timer to set rca=0 after elapsed
lukeocarwright 4:9b7ea5528a5c 190 g_upflag=0; //sets flag to iterate
lukeocarwright 4:9b7ea5528a5c 191 g_downflag=0; //sets flag to allow set to 0
lukeocarwright 4:9b7ea5528a5c 192 //printf("1 \n"); //only in while at v low frequency
lukeocarwright 4:9b7ea5528a5c 193 }
lukeocarwright 4:9b7ea5528a5c 194
lukeocarwright 5:e785b9cd58c9 195 */
lukeocarwright 4:9b7ea5528a5c 196 /*
lukeocarwright 2:07cef563acdf 197 void sinspeak ()
lukeocarwright 2:07cef563acdf 198 {
lukeocarwright 2:07cef563acdf 199 float f1=440.0;
lukeocarwright 2:07cef563acdf 200 float i=0;
lukeocarwright 3:b7df72682b81 201 unsigned short v=0;
lukeocarwright 2:07cef563acdf 202 int inc=0;
lukeocarwright 2:07cef563acdf 203 pad.reset_buttons();
lukeocarwright 2:07cef563acdf 204 f1 = pad.read_pot1();
lukeocarwright 3:b7df72682b81 205 f1 = 440.0f+440.0f*f1;
lukeocarwright 3:b7df72682b81 206 //printf("f1= %f \n",f1); // Used for Debug
lukeocarwright 2:07cef563acdf 207
lukeocarwright 2:07cef563acdf 208 while (inc<3000) {
lukeocarwright 2:07cef563acdf 209 int inti = i;
lukeocarwright 2:07cef563acdf 210 v = o[inti];
lukeocarwright 4:9b7ea5528a5c 211 printf("OUTPUT: %u \n", v);
lukeocarwright 4:9b7ea5528a5c 212 //pad.write_u16(v);
lukeocarwright 3:b7df72682b81 213 wait_us(230); //fs= 4k Ts=250us
lukeocarwright 3:b7df72682b81 214
lukeocarwright 3:b7df72682b81 215 i = i + ((4096.0f*f1)/4000.0f); //i+((samples*f)*Ts)
lukeocarwright 2:07cef563acdf 216 if (i>=4096.0f) {
lukeocarwright 2:07cef563acdf 217 i=i-4096.0f;
lukeocarwright 3:b7df72682b81 218 }
lukeocarwright 3:b7df72682b81 219 else {
lukeocarwright 4:9b7ea5528a5c 220 wait_us(3); // used to attempt note stabilisation to match other loop
lukeocarwright 2:07cef563acdf 221 }
lukeocarwright 2:07cef563acdf 222 inc++;
lukeocarwright 2:07cef563acdf 223 }
lukeocarwright 2:07cef563acdf 224 }
lukeocarwright 4:9b7ea5528a5c 225 */