Luke Cartwright / Mbed 2 deprecated ELEC2645_Project_el18loc_nearlythere

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   mbed

main.cpp@14:9cfe0041cc4e, 2020-05-19 (annotated)

Committer:
lukeocarwright
Date:
Tue May 19 15:04:33 2020 +0000
Revision:
14:9cfe0041cc4e
Parent:
13:27300c533dd1
Child:
15:1c67f064278e
Actually make proper sound atlast. Checked Concert A against piano. included more preprocessor debug (SLOW TIME) for Debug if output check required w. printf

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 14:9cfe0041cc4e 11 Last Edited: 19/05/2020
eencae 0:b7f1f47bb26a 12 */
eencae 0:b7f1f47bb26a 13
lukeocarwright 5:e785b9cd58c9 14 /* TO DO:
lukeocarwright 14:9cfe0041cc4e 15 Generate sound
lukeocarwright 8:f305ea78b2b1 16 add Menu functionality from front.cpp
lukeocarwright 8:f305ea78b2b1 17 front.h warning sort
lukeocarwright 7:33cb5f2db1ee 18 Settings tab
lukeocarwright 14:9cfe0041cc4e 19 ADSR (functionaluty)
lukeocarwright 8:f305ea78b2b1 20 MIDI
lukeocarwright 8:f305ea78b2b1 21 LEDS INSTALL
lukeocarwright 5:e785b9cd58c9 22 */
lukeocarwright 2:07cef563acdf 23 // Includes
eencae 0:b7f1f47bb26a 24 #include "mbed.h"
eencae 0:b7f1f47bb26a 25 #include "Gamepad.h"
eencae 0:b7f1f47bb26a 26 #include "N5110.h"
lukeocarwright 8:f305ea78b2b1 27 #include "Menu.h"
lukeocarwright 7:33cb5f2db1ee 28 #include "startup.h"
lukeocarwright 7:33cb5f2db1ee 29 #include "Front.h"
eencae 0:b7f1f47bb26a 30
lukeocarwright 9:f6ba53e355a0 31 #ifdef DEBUG
lukeocarwright 9:f6ba53e355a0 32 # include "Debug.h"
lukeocarwright 9:f6ba53e355a0 33 #endif
lukeocarwright 9:f6ba53e355a0 34
lukeocarwright 2:07cef563acdf 35 // Objects
eencae 0:b7f1f47bb26a 36 Gamepad pad;
eencae 0:b7f1f47bb26a 37 N5110 lcd;
lukeocarwright 8:f305ea78b2b1 38 Menu menu;
lukeocarwright 7:33cb5f2db1ee 39 startup start;
lukeocarwright 14:9cfe0041cc4e 40 Ticker tick;
lukeocarwright 4:9b7ea5528a5c 41
lukeocarwright 14:9cfe0041cc4e 42 //DigitalOut rca(PTC4);
lukeocarwright 14:9cfe0041cc4e 43 //Serial pc(USBTX, USBRX);
lukeocarwright 2:07cef563acdf 44
lukeocarwright 2:07cef563acdf 45 //Functions
lukeocarwright 5:e785b9cd58c9 46 //void squareWave();
lukeocarwright 4:9b7ea5528a5c 47 //void sinspeak();
lukeocarwright 14:9cfe0041cc4e 48 void noise_isr();
lukeocarwright 2:07cef563acdf 49
lukeocarwright 2:07cef563acdf 50
lukeocarwright 2:07cef563acdf 51 //Global Variables
lukeocarwright 14:9cfe0041cc4e 52 volatile extern int g_isr_flag; //may need extern
lukeocarwright 10:258a1eca02cc 53
eencae 0:b7f1f47bb26a 54 int main()
eencae 0:b7f1f47bb26a 55 {
lukeocarwright 2:07cef563acdf 56 printf("RUNNING CODE \n");
lukeocarwright 7:33cb5f2db1ee 57 start.initialise(lcd,pad); //initialises board and displays start screen
lukeocarwright 14:9cfe0041cc4e 58
lukeocarwright 14:9cfe0041cc4e 59 #ifdef DEBUG
lukeocarwright 14:9cfe0041cc4e 60 printf("DEBUG COMPILE RUNNING\n");
lukeocarwright 14:9cfe0041cc4e 61 run_LUTs_debug();
lukeocarwright 14:9cfe0041cc4e 62 #endif
lukeocarwright 14:9cfe0041cc4e 63
lukeocarwright 14:9cfe0041cc4e 64 #ifdef SLOW_TIME //ATTACH TICKERS FOR SOUND
lukeocarwright 14:9cfe0041cc4e 65 tick.attach_us(&noise_isr, 100000); //extended for debug (1Hz)
lukeocarwright 14:9cfe0041cc4e 66 #else
lukeocarwright 14:9cfe0041cc4e 67 tick.attach_us(&noise_isr, 250); //normal mode (4kHz)
lukeocarwright 14:9cfe0041cc4e 68 #endif
lukeocarwright 14:9cfe0041cc4e 69
lukeocarwright 14:9cfe0041cc4e 70 menu.mainmenu(lcd,pad);
lukeocarwright 9:f6ba53e355a0 71
lukeocarwright 14:9cfe0041cc4e 72 //UNUSED FUNCTIONS:-------------------------------------------------------------
lukeocarwright 5:e785b9cd58c9 73 //squareWave(); //generates pulse wave modulated by sin wave
lukeocarwright 4:9b7ea5528a5c 74 //sinspeak();
lukeocarwright 2:07cef563acdf 75 }
lukeocarwright 2:07cef563acdf 76
lukeocarwright 14:9cfe0041cc4e 77 void noise_isr() {
lukeocarwright 14:9cfe0041cc4e 78 #ifdef SLOW_TIME
lukeocarwright 14:9cfe0041cc4e 79 if (g_isr_flag==0) {
lukeocarwright 14:9cfe0041cc4e 80 printf("ISR INTTERUPT = 1\n");
lukeocarwright 14:9cfe0041cc4e 81 }
lukeocarwright 14:9cfe0041cc4e 82 #endif
lukeocarwright 14:9cfe0041cc4e 83 g_isr_flag=1;
lukeocarwright 14:9cfe0041cc4e 84 }
lukeocarwright 14:9cfe0041cc4e 85
lukeocarwright 5:e785b9cd58c9 86 /*
lukeocarwright 4:9b7ea5528a5c 87 void squareWave()
lukeocarwright 4:9b7ea5528a5c 88 {
lukeocarwright 4:9b7ea5528a5c 89 printf("Generating SIN PWM \n");
lukeocarwright 4:9b7ea5528a5c 90
lukeocarwright 4:9b7ea5528a5c 91 int i=0; //int based iterator
lukeocarwright 4:9b7ea5528a5c 92 float ifl=0; //float based itterator
lukeocarwright 4:9b7ea5528a5c 93 float f=50; //frequency of sin wave produced
lukeocarwright 4:9b7ea5528a5c 94 period.attach_us(&up_isr,g_period_us); //ticker to write 1 to rca
lukeocarwright 4:9b7ea5528a5c 95 down.attach_us(&down_isr,g_uptime_us); //ticker to write 0 to rca
lukeocarwright 5:e785b9cd58c9 96
lukeocarwright 5:e785b9cd58c9 97
lukeocarwright 4:9b7ea5528a5c 98 printf("g_period_us: %d \n", g_period_us);
lukeocarwright 4:9b7ea5528a5c 99 printf("sin Frequency: %f \n", f);
lukeocarwright 4:9b7ea5528a5c 100
lukeocarwright 4:9b7ea5528a5c 101 while (1) { //continual loop for pulse production
lukeocarwright 4:9b7ea5528a5c 102 float dutyratio = wavtable[i]; //calcualtes duty ratio of pulse
lukeocarwright 5:e785b9cd58c9 103
lukeocarwright 4:9b7ea5528a5c 104 g_uptime_us= dutyratio*g_period_us; //calculates duty ratio in usecs
lukeocarwright 4:9b7ea5528a5c 105 if (g_uptime_us<1) {
lukeocarwright 4:9b7ea5528a5c 106 g_uptime_us=g_period_us/100;
lukeocarwright 4:9b7ea5528a5c 107 } //sets to be value for timebeing to eliminate 0 error
lukeocarwright 4:9b7ea5528a5c 108 //float f=440*(pad.read_pot1()+1); //removed for simplification
lukeocarwright 5:e785b9cd58c9 109
lukeocarwright 4:9b7ea5528a5c 110 if (g_upflag==0) {
lukeocarwright 5:e785b9cd58c9 111
lukeocarwright 4:9b7ea5528a5c 112 ifl = ifl + (4096*f*g_period); //once rca=1 itterate sin function
lukeocarwright 4:9b7ea5528a5c 113 if (ifl>4096) {
lukeocarwright 4:9b7ea5528a5c 114 ifl= ifl-4096;
lukeocarwright 4:9b7ea5528a5c 115 }
lukeocarwright 4:9b7ea5528a5c 116 i=ifl;
lukeocarwright 5:e785b9cd58c9 117
lukeocarwright 4:9b7ea5528a5c 118 g_upflag=1; //reset flag
lukeocarwright 4:9b7ea5528a5c 119 //printf("iterate i: i= %d, ifl= %f \n", i, ifl);
lukeocarwright 4:9b7ea5528a5c 120 }
lukeocarwright 5:e785b9cd58c9 121
lukeocarwright 4:9b7ea5528a5c 122 //printf("DR: %f \n",dutyratio);
lukeocarwright 4:9b7ea5528a5c 123 //printf("sleep \n");
lukeocarwright 4:9b7ea5528a5c 124 sleep(); //sleeps till next isr
lukeocarwright 4:9b7ea5528a5c 125 }
lukeocarwright 4:9b7ea5528a5c 126 }
lukeocarwright 4:9b7ea5528a5c 127
lukeocarwright 2:07cef563acdf 128 void sinspeak ()
lukeocarwright 2:07cef563acdf 129 {
lukeocarwright 2:07cef563acdf 130 float f1=440.0;
lukeocarwright 2:07cef563acdf 131 float i=0;
lukeocarwright 3:b7df72682b81 132 unsigned short v=0;
lukeocarwright 2:07cef563acdf 133 int inc=0;
lukeocarwright 2:07cef563acdf 134 pad.reset_buttons();
lukeocarwright 2:07cef563acdf 135 f1 = pad.read_pot1();
lukeocarwright 3:b7df72682b81 136 f1 = 440.0f+440.0f*f1;
lukeocarwright 3:b7df72682b81 137 //printf("f1= %f \n",f1); // Used for Debug
lukeocarwright 2:07cef563acdf 138
lukeocarwright 2:07cef563acdf 139 while (inc<3000) {
lukeocarwright 2:07cef563acdf 140 int inti = i;
lukeocarwright 2:07cef563acdf 141 v = o[inti];
lukeocarwright 4:9b7ea5528a5c 142 printf("OUTPUT: %u \n", v);
lukeocarwright 4:9b7ea5528a5c 143 //pad.write_u16(v);
lukeocarwright 3:b7df72682b81 144 wait_us(230); //fs= 4k Ts=250us
lukeocarwright 3:b7df72682b81 145
lukeocarwright 3:b7df72682b81 146 i = i + ((4096.0f*f1)/4000.0f); //i+((samples*f)*Ts)
lukeocarwright 2:07cef563acdf 147 if (i>=4096.0f) {
lukeocarwright 2:07cef563acdf 148 i=i-4096.0f;
lukeocarwright 3:b7df72682b81 149 }
lukeocarwright 3:b7df72682b81 150 else {
lukeocarwright 4:9b7ea5528a5c 151 wait_us(3); // used to attempt note stabilisation to match other loop
lukeocarwright 2:07cef563acdf 152 }
lukeocarwright 2:07cef563acdf 153 inc++;
lukeocarwright 2:07cef563acdf 154 }
lukeocarwright 2:07cef563acdf 155 }
lukeocarwright 4:9b7ea5528a5c 156 */