Luke Cartwright / Mbed 2 deprecated ELEC2645_Project_el18loc_nearlythere

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Dependencies:   mbed

main.cpp@9:f6ba53e355a0, 2020-05-06 (annotated)

Committer:
lukeocarwright
Date:
Wed May 06 14:37:34 2020 +0000
Revision:
9:f6ba53e355a0
Parent:
8:f305ea78b2b1
Child:
10:258a1eca02cc
Outputted sin LUT in uint16_t with unit test using DEBUG macro. Allows direct writing of value to table to 16-bit DAC.

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 7:33cb5f2db1ee 11 Last Edited: 04/05/2020
eencae 0:b7f1f47bb26a 12 */
eencae 0:b7f1f47bb26a 13
lukeocarwright 5:e785b9cd58c9 14 /* TO DO:
lukeocarwright 8:f305ea78b2b1 15 add Menu functionality from front.cpp
lukeocarwright 8:f305ea78b2b1 16 front.h warning sort
lukeocarwright 7:33cb5f2db1ee 17 Settings tab
lukeocarwright 7:33cb5f2db1ee 18 Other wavetables
lukeocarwright 7:33cb5f2db1ee 19 Generate sound
lukeocarwright 7:33cb5f2db1ee 20 ADSR
lukeocarwright 8:f305ea78b2b1 21 MIDI
lukeocarwright 8:f305ea78b2b1 22 LEDS INSTALL
lukeocarwright 5:e785b9cd58c9 23 */
lukeocarwright 2:07cef563acdf 24 // Includes
eencae 0:b7f1f47bb26a 25 #include "mbed.h"
eencae 0:b7f1f47bb26a 26 #include "Gamepad.h"
eencae 0:b7f1f47bb26a 27 #include "N5110.h"
lukeocarwright 8:f305ea78b2b1 28 #include "Menu.h"
lukeocarwright 7:33cb5f2db1ee 29 #include "startup.h"
lukeocarwright 7:33cb5f2db1ee 30 #include "Front.h"
eencae 0:b7f1f47bb26a 31
lukeocarwright 9:f6ba53e355a0 32 #ifdef DEBUG
lukeocarwright 9:f6ba53e355a0 33 # include "Debug.h"
lukeocarwright 9:f6ba53e355a0 34 #endif
lukeocarwright 9:f6ba53e355a0 35
lukeocarwright 2:07cef563acdf 36 // Objects
eencae 0:b7f1f47bb26a 37 Gamepad pad;
eencae 0:b7f1f47bb26a 38 N5110 lcd;
lukeocarwright 8:f305ea78b2b1 39 Menu menu;
lukeocarwright 7:33cb5f2db1ee 40 startup start;
lukeocarwright 4:9b7ea5528a5c 41 Ticker down;
lukeocarwright 4:9b7ea5528a5c 42 Ticker period;
lukeocarwright 4:9b7ea5528a5c 43
lukeocarwright 4:9b7ea5528a5c 44 DigitalOut rca(PTC4);
lukeocarwright 2:07cef563acdf 45
lukeocarwright 2:07cef563acdf 46 Serial pc(USBTX, USBRX);
lukeocarwright 2:07cef563acdf 47
lukeocarwright 2:07cef563acdf 48 //Functions
lukeocarwright 5:e785b9cd58c9 49 //void squareWave();
lukeocarwright 4:9b7ea5528a5c 50 //void sinspeak();
lukeocarwright 5:e785b9cd58c9 51 //void down_isr();
lukeocarwright 5:e785b9cd58c9 52 //void up_isr();
lukeocarwright 2:07cef563acdf 53
lukeocarwright 2:07cef563acdf 54
lukeocarwright 2:07cef563acdf 55 //Global Variables
lukeocarwright 4:9b7ea5528a5c 56 // all times drastically slowed to attempt debugging in teraterm
lukeocarwright 7:33cb5f2db1ee 57 //float g_period = 0.002;
lukeocarwright 7:33cb5f2db1ee 58 //float g_unused= g_period*1000000.0f;
lukeocarwright 7:33cb5f2db1ee 59 //int g_period_us=g_unused;
lukeocarwright 7:33cb5f2db1ee 60 //volatile uint64_t g_uptime_us = g_period_us/2; // placeholder value
lukeocarwright 4:9b7ea5528a5c 61 //isr interrupt flags
lukeocarwright 7:33cb5f2db1ee 62 //volatile int g_upflag=1;
lukeocarwright 7:33cb5f2db1ee 63 //volatile int g_downflag=1;
eencae 0:b7f1f47bb26a 64
lukeocarwright 9:f6ba53e355a0 65 //volatile extern uint16_t sin_wavtable[1024];
lukeocarwright 9:f6ba53e355a0 66 //volatile extern double sin_d[1024];
lukeocarwright 9:f6ba53e355a0 67
lukeocarwright 9:f6ba53e355a0 68
lukeocarwright 9:f6ba53e355a0 69 volatile extern uint16_t sin_wavtable[1024];
lukeocarwright 9:f6ba53e355a0 70
eencae 0:b7f1f47bb26a 71 int main()
eencae 0:b7f1f47bb26a 72 {
lukeocarwright 2:07cef563acdf 73 printf("RUNNING CODE \n");
lukeocarwright 7:33cb5f2db1ee 74 start.initialise(lcd,pad); //initialises board and displays start screen
lukeocarwright 9:f6ba53e355a0 75
lukeocarwright 9:f6ba53e355a0 76 #ifdef DEBUG
lukeocarwright 9:f6ba53e355a0 77 printf("DEBUG COMPILE RUNNING\n");
lukeocarwright 9:f6ba53e355a0 78 run_LUTs_debug();
lukeocarwright 9:f6ba53e355a0 79 #endif
lukeocarwright 7:33cb5f2db1ee 80 menu.mainmenu(lcd,pad);
lukeocarwright 5:e785b9cd58c9 81 //squareWave(); //generates pulse wave modulated by sin wave
lukeocarwright 4:9b7ea5528a5c 82 //sinspeak();
lukeocarwright 2:07cef563acdf 83 }
lukeocarwright 2:07cef563acdf 84
lukeocarwright 5:e785b9cd58c9 85 /*
lukeocarwright 4:9b7ea5528a5c 86 void squareWave()
lukeocarwright 4:9b7ea5528a5c 87 {
lukeocarwright 4:9b7ea5528a5c 88 printf("Generating SIN PWM \n");
lukeocarwright 4:9b7ea5528a5c 89
lukeocarwright 4:9b7ea5528a5c 90 int i=0; //int based iterator
lukeocarwright 4:9b7ea5528a5c 91 float ifl=0; //float based itterator
lukeocarwright 4:9b7ea5528a5c 92 float f=50; //frequency of sin wave produced
lukeocarwright 4:9b7ea5528a5c 93 period.attach_us(&up_isr,g_period_us); //ticker to write 1 to rca
lukeocarwright 4:9b7ea5528a5c 94 down.attach_us(&down_isr,g_uptime_us); //ticker to write 0 to rca
lukeocarwright 5:e785b9cd58c9 95
lukeocarwright 5:e785b9cd58c9 96
lukeocarwright 4:9b7ea5528a5c 97 printf("g_period_us: %d \n", g_period_us);
lukeocarwright 4:9b7ea5528a5c 98 printf("sin Frequency: %f \n", f);
lukeocarwright 4:9b7ea5528a5c 99
lukeocarwright 4:9b7ea5528a5c 100 while (1) { //continual loop for pulse production
lukeocarwright 4:9b7ea5528a5c 101 float dutyratio = wavtable[i]; //calcualtes duty ratio of pulse
lukeocarwright 5:e785b9cd58c9 102
lukeocarwright 4:9b7ea5528a5c 103 g_uptime_us= dutyratio*g_period_us; //calculates duty ratio in usecs
lukeocarwright 4:9b7ea5528a5c 104 if (g_uptime_us<1) {
lukeocarwright 4:9b7ea5528a5c 105 g_uptime_us=g_period_us/100;
lukeocarwright 4:9b7ea5528a5c 106 } //sets to be value for timebeing to eliminate 0 error
lukeocarwright 4:9b7ea5528a5c 107 //float f=440*(pad.read_pot1()+1); //removed for simplification
lukeocarwright 5:e785b9cd58c9 108
lukeocarwright 4:9b7ea5528a5c 109 if (g_upflag==0) {
lukeocarwright 5:e785b9cd58c9 110
lukeocarwright 4:9b7ea5528a5c 111 ifl = ifl + (4096*f*g_period); //once rca=1 itterate sin function
lukeocarwright 4:9b7ea5528a5c 112 if (ifl>4096) {
lukeocarwright 4:9b7ea5528a5c 113 ifl= ifl-4096;
lukeocarwright 4:9b7ea5528a5c 114 }
lukeocarwright 4:9b7ea5528a5c 115 i=ifl;
lukeocarwright 5:e785b9cd58c9 116
lukeocarwright 4:9b7ea5528a5c 117 g_upflag=1; //reset flag
lukeocarwright 4:9b7ea5528a5c 118 //printf("iterate i: i= %d, ifl= %f \n", i, ifl);
lukeocarwright 4:9b7ea5528a5c 119 }
lukeocarwright 5:e785b9cd58c9 120
lukeocarwright 4:9b7ea5528a5c 121 //printf("DR: %f \n",dutyratio);
lukeocarwright 4:9b7ea5528a5c 122 //printf("sleep \n");
lukeocarwright 4:9b7ea5528a5c 123 sleep(); //sleeps till next isr
lukeocarwright 4:9b7ea5528a5c 124 }
lukeocarwright 4:9b7ea5528a5c 125 }
lukeocarwright 4:9b7ea5528a5c 126
lukeocarwright 4:9b7ea5528a5c 127 void down_isr() //sets rca to 0
lukeocarwright 4:9b7ea5528a5c 128 {
lukeocarwright 4:9b7ea5528a5c 129 //printf("downISR \n");
lukeocarwright 4:9b7ea5528a5c 130 if (g_downflag==0) {//stops error trigger
lukeocarwright 4:9b7ea5528a5c 131 rca.write(0);
lukeocarwright 4:9b7ea5528a5c 132 g_downflag=1;
lukeocarwright 4:9b7ea5528a5c 133 g_uptime_us= g_uptime_us+g_period_us; // eliminates it calling if =0
lukeocarwright 4:9b7ea5528a5c 134 //printf("0 \n");//print only in while v. slow freguency
lukeocarwright 4:9b7ea5528a5c 135 }
lukeocarwright 4:9b7ea5528a5c 136 }
lukeocarwright 4:9b7ea5528a5c 137
lukeocarwright 4:9b7ea5528a5c 138 void up_isr() //sets rca=1
lukeocarwright 4:9b7ea5528a5c 139 {
lukeocarwright 4:9b7ea5528a5c 140 //printf("upISR \n");
lukeocarwright 4:9b7ea5528a5c 141 rca.write(1);
lukeocarwright 4:9b7ea5528a5c 142 down.attach_us(&down_isr,g_uptime_us); //timer to set rca=0 after elapsed
lukeocarwright 4:9b7ea5528a5c 143 g_upflag=0; //sets flag to iterate
lukeocarwright 4:9b7ea5528a5c 144 g_downflag=0; //sets flag to allow set to 0
lukeocarwright 4:9b7ea5528a5c 145 //printf("1 \n"); //only in while at v low frequency
lukeocarwright 4:9b7ea5528a5c 146 }
lukeocarwright 4:9b7ea5528a5c 147
lukeocarwright 5:e785b9cd58c9 148 */
lukeocarwright 4:9b7ea5528a5c 149 /*
lukeocarwright 2:07cef563acdf 150 void sinspeak ()
lukeocarwright 2:07cef563acdf 151 {
lukeocarwright 2:07cef563acdf 152 float f1=440.0;
lukeocarwright 2:07cef563acdf 153 float i=0;
lukeocarwright 3:b7df72682b81 154 unsigned short v=0;
lukeocarwright 2:07cef563acdf 155 int inc=0;
lukeocarwright 2:07cef563acdf 156 pad.reset_buttons();
lukeocarwright 2:07cef563acdf 157 f1 = pad.read_pot1();
lukeocarwright 3:b7df72682b81 158 f1 = 440.0f+440.0f*f1;
lukeocarwright 3:b7df72682b81 159 //printf("f1= %f \n",f1); // Used for Debug
lukeocarwright 2:07cef563acdf 160
lukeocarwright 2:07cef563acdf 161 while (inc<3000) {
lukeocarwright 2:07cef563acdf 162 int inti = i;
lukeocarwright 2:07cef563acdf 163 v = o[inti];
lukeocarwright 4:9b7ea5528a5c 164 printf("OUTPUT: %u \n", v);
lukeocarwright 4:9b7ea5528a5c 165 //pad.write_u16(v);
lukeocarwright 3:b7df72682b81 166 wait_us(230); //fs= 4k Ts=250us
lukeocarwright 3:b7df72682b81 167
lukeocarwright 3:b7df72682b81 168 i = i + ((4096.0f*f1)/4000.0f); //i+((samples*f)*Ts)
lukeocarwright 2:07cef563acdf 169 if (i>=4096.0f) {
lukeocarwright 2:07cef563acdf 170 i=i-4096.0f;
lukeocarwright 3:b7df72682b81 171 }
lukeocarwright 3:b7df72682b81 172 else {
lukeocarwright 4:9b7ea5528a5c 173 wait_us(3); // used to attempt note stabilisation to match other loop
lukeocarwright 2:07cef563acdf 174 }
lukeocarwright 2:07cef563acdf 175 inc++;
lukeocarwright 2:07cef563acdf 176 }
lukeocarwright 2:07cef563acdf 177 }
lukeocarwright 4:9b7ea5528a5c 178 */