Wayne Chin / Mbed 2 deprecated UIMockup

Got quadrature decoders and mode switch working

Dependencies:   mbed

main.cpp@1:fb60f76e33ee, 2010-10-25 (annotated)

Committer:
wac
Date:
Mon Oct 25 20:48:04 2010 +0000
Revision:
1:fb60f76e33ee
Parent:
0:7ae28d2c1e3e 
0.2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wac 0:7ae28d2c1e3e 1 // 9430 User Interface Mockup
wac 0:7ae28d2c1e3e 2 //
wac 0:7ae28d2c1e3e 3 // Read quadrature encoder and drive LEDs
wac 0:7ae28d2c1e3e 4 // Version 0.1
wac 0:7ae28d2c1e3e 5 // Created by Wayne Chin
wac 0:7ae28d2c1e3e 6 // October 22, 2010
wac 1:fb60f76e33ee 7 // Version 0.2
wac 1:fb60f76e33ee 8 // Added amps/gas mode selections; confirmed quad decoder operation.
wac 1:fb60f76e33ee 9 // October 25, 2010
wac 0:7ae28d2c1e3e 10
wac 0:7ae28d2c1e3e 11 #include "mbed.h"
wac 0:7ae28d2c1e3e 12
wac 0:7ae28d2c1e3e 13 #define TRUE 1
wac 0:7ae28d2c1e3e 14 #define FALSE 0
wac 0:7ae28d2c1e3e 15 #define ON 0 // LED drives are inverted
wac 0:7ae28d2c1e3e 16 #define OFF 1 // LED drives are inverted
wac 1:fb60f76e33ee 17 #define MAXAMPS200 200 // Max amps display
wac 1:fb60f76e33ee 18 #define MINAMPSET 25 // Min amps display
wac 1:fb60f76e33ee 19 #define MAXGASPRESS 99 // Max gas display
wac 1:fb60f76e33ee 20 #define STARTGASPRESS 75
wac 0:7ae28d2c1e3e 21 #define MINGASPRESS 0
wac 1:fb60f76e33ee 22 #define AMPSMODE 0
wac 1:fb60f76e33ee 23 #define GASMODE 1
wac 1:fb60f76e33ee 24 #define BUTTONTIMEOUT 1000 // Mode change timeout in milliseconds
wac 0:7ae28d2c1e3e 25
wac 0:7ae28d2c1e3e 26 // Global variables
wac 0:7ae28d2c1e3e 27 int quadnew, quadold; // Quadrature decoding
wac 0:7ae28d2c1e3e 28 int quadcount; // Integer counter for quadrature encoder output
wac 1:fb60f76e33ee 29 int gascount, ampscount; // Separately keep track of gas and amps
wac 0:7ae28d2c1e3e 30 int select, gasselect; // Keep track of mode/gas selection LEDs
wac 0:7ae28d2c1e3e 31 int quadswitchnew, quadswitchold; // Debounce pushbutton states
wac 1:fb60f76e33ee 32 int mode; // Keep track of AMPS or GAS pressure display modes
wac 1:fb60f76e33ee 33 int modechanged; // Keep track of entry into mode change
wac 1:fb60f76e33ee 34
wac 1:fb60f76e33ee 35 Serial pc(USBTX, USBRX); // tx, rx
wac 0:7ae28d2c1e3e 36
wac 0:7ae28d2c1e3e 37 // mbed LEDs
wac 0:7ae28d2c1e3e 38 DigitalOut led1(LED1);
wac 0:7ae28d2c1e3e 39 DigitalOut led2(LED2);
wac 0:7ae28d2c1e3e 40 DigitalOut led3(LED3);
wac 0:7ae28d2c1e3e 41 DigitalOut led4(LED4);
wac 0:7ae28d2c1e3e 42
wac 0:7ae28d2c1e3e 43 // Quadrature encoder inputs
wac 0:7ae28d2c1e3e 44 DigitalIn quada(p21);
wac 0:7ae28d2c1e3e 45 DigitalIn quadb(p22);
wac 0:7ae28d2c1e3e 46 DigitalIn quadsw(p30);
wac 0:7ae28d2c1e3e 47
wac 0:7ae28d2c1e3e 48 // 7-segment display LEDs
wac 0:7ae28d2c1e3e 49 DigitalOut LED1a(p23); // Hundreds digit
wac 0:7ae28d2c1e3e 50 DigitalOut LED1b(p24);
wac 0:7ae28d2c1e3e 51 DigitalOut LED1c(p25);
wac 0:7ae28d2c1e3e 52 DigitalOut LED1d(p26);
wac 0:7ae28d2c1e3e 53 DigitalOut LED1e(p27);
wac 0:7ae28d2c1e3e 54 DigitalOut LED1f(p28);
wac 0:7ae28d2c1e3e 55 DigitalOut LED1g(p29);
wac 0:7ae28d2c1e3e 56 DigitalOut LED2a(p13); // Tens digit
wac 0:7ae28d2c1e3e 57 DigitalOut LED2b(p14);
wac 0:7ae28d2c1e3e 58 DigitalOut LED2c(p15);
wac 0:7ae28d2c1e3e 59 DigitalOut LED2d(p16);
wac 0:7ae28d2c1e3e 60 DigitalOut LED2e(p17);
wac 0:7ae28d2c1e3e 61 DigitalOut LED2f(p18);
wac 0:7ae28d2c1e3e 62 DigitalOut LED2g(p19);
wac 0:7ae28d2c1e3e 63 DigitalOut LED3a(p5); // Ones digit
wac 0:7ae28d2c1e3e 64 DigitalOut LED3b(p6);
wac 0:7ae28d2c1e3e 65 DigitalOut LED3c(p7);
wac 0:7ae28d2c1e3e 66 DigitalOut LED3d(p8);
wac 0:7ae28d2c1e3e 67 DigitalOut LED3e(p9);
wac 0:7ae28d2c1e3e 68 DigitalOut LED3f(p10);
wac 0:7ae28d2c1e3e 69 DigitalOut LED3g(p11);
wac 0:7ae28d2c1e3e 70
wac 0:7ae28d2c1e3e 71 // Gas selection LEDs
wac 0:7ae28d2c1e3e 72 //DigitalOut LEDg1(p20); // Not wired up
wac 0:7ae28d2c1e3e 73 DigitalOut LEDg2(p20);
wac 0:7ae28d2c1e3e 74 DigitalOut LEDg3(p12);
wac 0:7ae28d2c1e3e 75 //DigitalOut LEDg4(p20); // Not wired up
wac 0:7ae28d2c1e3e 76
wac 0:7ae28d2c1e3e 77 // Interrupt
wac 0:7ae28d2c1e3e 78 Ticker getswitches; // Periodic function call used to sample switches
wac 1:fb60f76e33ee 79 Timer modetimer; // Used for press-and-hold function
wac 0:7ae28d2c1e3e 80
wac 0:7ae28d2c1e3e 81 // Take integer input and drive 3 digit 7-segment display and toggle among gas select LEDs
wac 0:7ae28d2c1e3e 82 void LEDout(int number)
wac 0:7ae28d2c1e3e 83 {
wac 0:7ae28d2c1e3e 84 int hundreds, tens, ones;
wac 1:fb60f76e33ee 85 if (mode == AMPSMODE && number > 999) // Throw out numbers greater than 999
wac 1:fb60f76e33ee 86 return;
wac 1:fb60f76e33ee 87 else if (mode == GASMODE && number > 99) // Throw out numbers greater than 99
wac 0:7ae28d2c1e3e 88 return;
wac 0:7ae28d2c1e3e 89 else if (number < 0) // Throw out numbers less than 0
wac 0:7ae28d2c1e3e 90 return;
wac 1:fb60f76e33ee 91 else // Display number
wac 0:7ae28d2c1e3e 92 {
wac 0:7ae28d2c1e3e 93 // Extract hundreds digit
wac 0:7ae28d2c1e3e 94 hundreds = number - (number / 100);
wac 0:7ae28d2c1e3e 95 // Extract tens digit
wac 0:7ae28d2c1e3e 96 tens = number - hundreds;
wac 0:7ae28d2c1e3e 97 tens = tens - (tens / 10);
wac 0:7ae28d2c1e3e 98 // Extract ones digit
wac 0:7ae28d2c1e3e 99 ones = number - hundreds - tens;
wac 0:7ae28d2c1e3e 100
wac 1:fb60f76e33ee 101 if (mode == AMPSMODE)
wac 0:7ae28d2c1e3e 102 {
wac 1:fb60f76e33ee 103 switch (hundreds)
wac 1:fb60f76e33ee 104 {
wac 1:fb60f76e33ee 105 case 0: {
wac 1:fb60f76e33ee 106 LED1a = ON; LED1b = ON; LED1c = ON; LED1d = ON; LED1e = ON; LED1f = ON; LED1g = OFF; }
wac 1:fb60f76e33ee 107 break;
wac 1:fb60f76e33ee 108 case 1: {
wac 1:fb60f76e33ee 109 LED1a = OFF; LED1b = ON; LED1c = ON; LED1d = OFF; LED1e = OFF; LED1f = OFF; LED1g = OFF; }
wac 1:fb60f76e33ee 110 break;
wac 1:fb60f76e33ee 111 case 2: {
wac 1:fb60f76e33ee 112 LED1a = ON; LED1b = ON; LED1c = OFF; LED1d = ON; LED1e = ON; LED1f = OFF; LED1g = ON; }
wac 1:fb60f76e33ee 113 break;
wac 1:fb60f76e33ee 114 case 3: {
wac 1:fb60f76e33ee 115 LED1a = ON; LED1b = ON; LED1c = ON; LED1d = ON; LED1e = OFF; LED1f = OFF; LED1g = ON; }
wac 1:fb60f76e33ee 116 break;
wac 1:fb60f76e33ee 117 case 4: {
wac 1:fb60f76e33ee 118 LED1a = OFF; LED1b = ON; LED1c = ON; LED1d = OFF; LED1e = OFF; LED1f = ON; LED1g = ON; }
wac 1:fb60f76e33ee 119 break;
wac 1:fb60f76e33ee 120 case 5: {
wac 1:fb60f76e33ee 121 LED1a = ON; LED1b = OFF; LED1c = ON; LED1d = ON; LED1e = OFF; LED1f = ON; LED1g = ON; }
wac 1:fb60f76e33ee 122 break;
wac 1:fb60f76e33ee 123 case 6: {
wac 1:fb60f76e33ee 124 LED1a = ON; LED1b = OFF; LED1c = ON; LED1d = ON; LED1e = ON; LED1f = ON; LED1g = ON; }
wac 1:fb60f76e33ee 125 break;
wac 1:fb60f76e33ee 126 case 7: {
wac 1:fb60f76e33ee 127 LED1a = ON; LED1b = ON; LED1c = ON; LED1d = OFF; LED1e = OFF; LED1f = OFF; LED1g = OFF; }
wac 1:fb60f76e33ee 128 break;
wac 1:fb60f76e33ee 129 case 8: {
wac 1:fb60f76e33ee 130 LED1a = ON; LED1b = ON; LED1c = ON; LED1d = ON; LED1e = ON; LED1f = ON; LED1g = ON; }
wac 1:fb60f76e33ee 131 break;
wac 1:fb60f76e33ee 132 case 9: {
wac 1:fb60f76e33ee 133 LED1a = ON; LED1b = ON; LED1c = ON; LED1d = ON; LED1e = OFF; LED1f = ON; LED1g = ON; }
wac 1:fb60f76e33ee 134 break;
wac 1:fb60f76e33ee 135 default:
wac 1:fb60f76e33ee 136 break; // Do nothing
wac 1:fb60f76e33ee 137 } // switch (hundreds)
wac 1:fb60f76e33ee 138 }
wac 1:fb60f76e33ee 139 else // (mode == GASMODE)
wac 1:fb60f76e33ee 140 {
wac 1:fb60f76e33ee 141 // Turn off hundreds digit in gas mode
wac 1:fb60f76e33ee 142 LED1a = OFF; LED1b = OFF; LED1c = OFF; LED1d = OFF; LED1e = OFF; LED1f = OFF; LED1g = OFF;
wac 1:fb60f76e33ee 143 }
wac 1:fb60f76e33ee 144
wac 0:7ae28d2c1e3e 145 switch (tens)
wac 0:7ae28d2c1e3e 146 {
wac 1:fb60f76e33ee 147 case 0: {
wac 1:fb60f76e33ee 148 LED2a = ON; LED2b = ON; LED2c = ON; LED2d = ON; LED2e = ON; LED2f = ON; LED2g = OFF; }
wac 0:7ae28d2c1e3e 149 break;
wac 1:fb60f76e33ee 150 case 1: {
wac 1:fb60f76e33ee 151 LED2a = OFF; LED2b = ON; LED2c = ON; LED2d = OFF; LED2e = OFF; LED2f = OFF; LED2g = OFF; }
wac 0:7ae28d2c1e3e 152 break;
wac 1:fb60f76e33ee 153 case 2: {
wac 1:fb60f76e33ee 154 LED2a = ON; LED2b = ON; LED2c = OFF; LED2d = ON; LED2e = ON; LED2f = OFF; LED2g = ON; }
wac 0:7ae28d2c1e3e 155 break;
wac 1:fb60f76e33ee 156 case 3: {
wac 1:fb60f76e33ee 157 LED2a = ON; LED2b = ON; LED2c = ON; LED2d = ON; LED2e = OFF; LED2f = OFF; LED2g = ON; }
wac 0:7ae28d2c1e3e 158 break;
wac 1:fb60f76e33ee 159 case 4: {
wac 1:fb60f76e33ee 160 LED2a = OFF; LED2b = ON; LED2c = ON; LED2d = OFF; LED2e = OFF; LED2f = ON; LED2g = ON; }
wac 0:7ae28d2c1e3e 161 break;
wac 1:fb60f76e33ee 162 case 5: {
wac 1:fb60f76e33ee 163 LED2a = ON; LED2b = OFF; LED2c = ON; LED2d = ON; LED2e = OFF; LED2f = ON; LED2g = ON; }
wac 0:7ae28d2c1e3e 164 break;
wac 1:fb60f76e33ee 165 case 6: {
wac 1:fb60f76e33ee 166 LED2a = ON; LED2b = OFF; LED2c = ON; LED2d = ON; LED2e = ON; LED2f = ON; LED2g = ON; }
wac 0:7ae28d2c1e3e 167 break;
wac 1:fb60f76e33ee 168 case 7: {
wac 1:fb60f76e33ee 169 LED2a = ON; LED2b = ON; LED2c = ON; LED2d = OFF; LED2e = OFF; LED2f = OFF; LED2g = OFF; }
wac 0:7ae28d2c1e3e 170 break;
wac 1:fb60f76e33ee 171 case 8: {
wac 1:fb60f76e33ee 172 LED2a = ON; LED2b = ON; LED2c = ON; LED2d = ON; LED2e = ON; LED2f = ON; LED2g = ON; }
wac 0:7ae28d2c1e3e 173 break;
wac 1:fb60f76e33ee 174 case 9: {
wac 1:fb60f76e33ee 175 LED2a = ON; LED2b = ON; LED2c = ON; LED2d = ON; LED2e = OFF; LED2f = ON; LED2g = ON; }
wac 0:7ae28d2c1e3e 176 break;
wac 0:7ae28d2c1e3e 177 default:
wac 0:7ae28d2c1e3e 178 break; // Do nothing
wac 0:7ae28d2c1e3e 179 } // switch (tens)
wac 0:7ae28d2c1e3e 180
wac 0:7ae28d2c1e3e 181 switch (ones)
wac 0:7ae28d2c1e3e 182 {
wac 1:fb60f76e33ee 183 case 0: {
wac 1:fb60f76e33ee 184 LED3a = ON; LED3b = ON; LED3c = ON; LED3d = ON; LED3e = ON; LED3f = ON; LED3g = OFF; }
wac 0:7ae28d2c1e3e 185 break;
wac 1:fb60f76e33ee 186 case 1: {
wac 1:fb60f76e33ee 187 LED3a = OFF; LED3b = ON; LED3c = ON; LED3d = OFF; LED3e = OFF; LED3f = OFF; LED3g = OFF; }
wac 0:7ae28d2c1e3e 188 break;
wac 1:fb60f76e33ee 189 case 2: {
wac 1:fb60f76e33ee 190 LED3a = ON; LED3b = ON; LED3c = OFF; LED3d = ON; LED3e = ON; LED3f = OFF; LED3g = ON; }
wac 0:7ae28d2c1e3e 191 break;
wac 1:fb60f76e33ee 192 case 3: {
wac 1:fb60f76e33ee 193 LED3a = ON; LED3b = ON; LED3c = ON; LED3d = ON; LED3e = OFF; LED3f = OFF; LED3g = ON; }
wac 0:7ae28d2c1e3e 194 break;
wac 1:fb60f76e33ee 195 case 4: {
wac 1:fb60f76e33ee 196 LED3a = OFF; LED3b = ON; LED3c = ON; LED3d = OFF; LED3e = OFF; LED3f = ON; LED3g = ON; }
wac 0:7ae28d2c1e3e 197 break;
wac 1:fb60f76e33ee 198 case 5: {
wac 1:fb60f76e33ee 199 LED3a = ON; LED3b = OFF; LED3c = ON; LED3d = ON; LED3e = OFF; LED3f = ON; LED3g = ON; }
wac 0:7ae28d2c1e3e 200 break;
wac 1:fb60f76e33ee 201 case 6: {
wac 1:fb60f76e33ee 202 LED3a = ON; LED3b = OFF; LED3c = ON; LED3d = ON; LED3e = ON; LED3f = ON; LED3g = ON; }
wac 0:7ae28d2c1e3e 203 break;
wac 1:fb60f76e33ee 204 case 7: {
wac 1:fb60f76e33ee 205 LED3a = ON; LED3b = ON; LED3c = ON; LED3d = OFF; LED3e = OFF; LED3f = OFF; LED3g = OFF; }
wac 0:7ae28d2c1e3e 206 break;
wac 1:fb60f76e33ee 207 case 8: {
wac 1:fb60f76e33ee 208 LED3a = ON; LED3b = ON; LED3c = ON; LED3d = ON; LED3e = ON; LED3f = ON; LED3g = ON; }
wac 0:7ae28d2c1e3e 209 break;
wac 1:fb60f76e33ee 210 case 9: {
wac 1:fb60f76e33ee 211 LED3a = ON; LED3b = ON; LED3c = ON; LED3d = ON; LED3e = OFF; LED3f = ON; LED3g = ON; }
wac 0:7ae28d2c1e3e 212 break;
wac 0:7ae28d2c1e3e 213 default:
wac 0:7ae28d2c1e3e 214 break; // Do nothing
wac 0:7ae28d2c1e3e 215 } // switch (ones)
wac 1:fb60f76e33ee 216 } // if Display number
wac 0:7ae28d2c1e3e 217 } // LEDout()
wac 0:7ae28d2c1e3e 218
wac 0:7ae28d2c1e3e 219 // Read quadrature encoder switch inputs from I/O port.
wac 0:7ae28d2c1e3e 220 // Return 2-bit value with (quada,quadb).
wac 0:7ae28d2c1e3e 221 int getquad()
wac 0:7ae28d2c1e3e 222 {
wac 0:7ae28d2c1e3e 223 if (quada == 0 && quadb == 0) // (0,0)
wac 0:7ae28d2c1e3e 224 return(0);
wac 0:7ae28d2c1e3e 225 else if (quada == 1 && quadb == 0) // Clockwise from (0,0)
wac 0:7ae28d2c1e3e 226 return(2);
wac 0:7ae28d2c1e3e 227 else if (quada == 1 && quadb == 1) // Clockwise from (1,0)
wac 0:7ae28d2c1e3e 228 return(3);
wac 0:7ae28d2c1e3e 229 else // Clockwise from (1,1)
wac 0:7ae28d2c1e3e 230 return(1);
wac 0:7ae28d2c1e3e 231 } // getquad()
wac 0:7ae28d2c1e3e 232
wac 0:7ae28d2c1e3e 233 // Read quadrature encoder, update counter variable, and update LEDs
wac 0:7ae28d2c1e3e 234 // Quadrature clockwise states: 00 -> 10 -> 11 -> 01
wac 0:7ae28d2c1e3e 235 // Quadrature counter-clockwise states: 00 -> 01 -> 11 -> 10
wac 0:7ae28d2c1e3e 236 void sampleswitches()
wac 0:7ae28d2c1e3e 237 {
wac 1:fb60f76e33ee 238 int quadcountold = quadcount;
wac 0:7ae28d2c1e3e 239 // Change gas select state only when button is depressed
wac 0:7ae28d2c1e3e 240 quadswitchnew = quadsw;
wac 1:fb60f76e33ee 241 if (quadswitchnew == OFF && quadswitchold == ON) // Button pushed down, then released
wac 0:7ae28d2c1e3e 242 {
wac 1:fb60f76e33ee 243 if (modetimer.read_ms() <= BUTTONTIMEOUT)
wac 1:fb60f76e33ee 244 {
wac 1:fb60f76e33ee 245 if (mode == AMPSMODE)
wac 1:fb60f76e33ee 246 {
wac 1:fb60f76e33ee 247 select++;
wac 1:fb60f76e33ee 248 if (select > 3) // Cycle through 2 UIMockup LEDs
wac 1:fb60f76e33ee 249 select = 2;
wac 1:fb60f76e33ee 250 }
wac 1:fb60f76e33ee 251 else // (mode == GASMODE)
wac 1:fb60f76e33ee 252 {
wac 1:fb60f76e33ee 253 gasselect++;
wac 1:fb60f76e33ee 254 if (gasselect > 4) // Cycle through 4 mbed LEDs
wac 1:fb60f76e33ee 255 gasselect = 1;
wac 1:fb60f76e33ee 256 }
wac 1:fb60f76e33ee 257 }
wac 1:fb60f76e33ee 258 modetimer.stop();
wac 1:fb60f76e33ee 259 modetimer.reset();
wac 1:fb60f76e33ee 260 quadswitchold = quadswitchnew;
wac 1:fb60f76e33ee 261 modechanged = FALSE;
wac 1:fb60f76e33ee 262 }
wac 1:fb60f76e33ee 263 else if (quadswitchnew == ON && quadswitchold == ON) // Button held down
wac 1:fb60f76e33ee 264 {
wac 1:fb60f76e33ee 265 if (modetimer.read_ms() == 0)
wac 1:fb60f76e33ee 266 modetimer.start();
wac 1:fb60f76e33ee 267 else if (modetimer.read_ms() > BUTTONTIMEOUT) // Look for mode change
wac 1:fb60f76e33ee 268 {
wac 1:fb60f76e33ee 269 if (modechanged == FALSE)
wac 1:fb60f76e33ee 270 {
wac 1:fb60f76e33ee 271 if (mode == AMPSMODE)
wac 1:fb60f76e33ee 272 {
wac 1:fb60f76e33ee 273 mode = GASMODE;
wac 1:fb60f76e33ee 274 pc.printf("Gas mode\n\r");
wac 1:fb60f76e33ee 275 }
wac 1:fb60f76e33ee 276 else
wac 1:fb60f76e33ee 277 {
wac 1:fb60f76e33ee 278 mode = AMPSMODE;
wac 1:fb60f76e33ee 279 pc.printf("Amps mode\n\r");
wac 1:fb60f76e33ee 280 }
wac 1:fb60f76e33ee 281 modetimer.stop();
wac 1:fb60f76e33ee 282 modechanged = TRUE;
wac 1:fb60f76e33ee 283 }
wac 1:fb60f76e33ee 284 }
wac 0:7ae28d2c1e3e 285 quadswitchold = quadswitchnew;
wac 0:7ae28d2c1e3e 286 }
wac 1:fb60f76e33ee 287 else if (quadswitchnew == ON) // Button depressed for the first time
wac 1:fb60f76e33ee 288 quadswitchold = quadswitchnew; // Do nothing
wac 0:7ae28d2c1e3e 289 else if (quadswitchnew == OFF) // Button released
wac 0:7ae28d2c1e3e 290 quadswitchold = quadswitchnew; // Do nothing
wac 0:7ae28d2c1e3e 291
wac 1:fb60f76e33ee 292 // Update 7-segment display
wac 0:7ae28d2c1e3e 293 quadnew = getquad(); // Get new quad state
wac 0:7ae28d2c1e3e 294 switch (quadold)
wac 0:7ae28d2c1e3e 295 {
wac 0:7ae28d2c1e3e 296 case 0:
wac 0:7ae28d2c1e3e 297 switch (quadnew)
wac 0:7ae28d2c1e3e 298 {
wac 0:7ae28d2c1e3e 299 case 0:
wac 0:7ae28d2c1e3e 300 break;
wac 0:7ae28d2c1e3e 301 case 2:
wac 0:7ae28d2c1e3e 302 quadcount++;
wac 0:7ae28d2c1e3e 303 break;
wac 0:7ae28d2c1e3e 304 case 1:
wac 0:7ae28d2c1e3e 305 quadcount--;
wac 0:7ae28d2c1e3e 306 break;
wac 0:7ae28d2c1e3e 307 case 3:
wac 0:7ae28d2c1e3e 308 ; // Missed a count, so do nothing
wac 0:7ae28d2c1e3e 309 break;
wac 0:7ae28d2c1e3e 310 } // switch
wac 0:7ae28d2c1e3e 311 break;
wac 0:7ae28d2c1e3e 312 case 1:
wac 0:7ae28d2c1e3e 313 switch (quadnew)
wac 0:7ae28d2c1e3e 314 {
wac 0:7ae28d2c1e3e 315 case 1:
wac 0:7ae28d2c1e3e 316 break;
wac 0:7ae28d2c1e3e 317 case 0:
wac 0:7ae28d2c1e3e 318 quadcount++;
wac 0:7ae28d2c1e3e 319 break;
wac 0:7ae28d2c1e3e 320 case 3:
wac 0:7ae28d2c1e3e 321 quadcount--;
wac 0:7ae28d2c1e3e 322 break;
wac 0:7ae28d2c1e3e 323 case 2:
wac 0:7ae28d2c1e3e 324 ; // Missed a count, so do nothing
wac 0:7ae28d2c1e3e 325 break;
wac 0:7ae28d2c1e3e 326 } //switch
wac 0:7ae28d2c1e3e 327 break;
wac 0:7ae28d2c1e3e 328 case 2:
wac 0:7ae28d2c1e3e 329 switch (quadnew)
wac 0:7ae28d2c1e3e 330 {
wac 0:7ae28d2c1e3e 331 case 2:
wac 0:7ae28d2c1e3e 332 break;
wac 0:7ae28d2c1e3e 333 case 3:
wac 0:7ae28d2c1e3e 334 quadcount++;
wac 0:7ae28d2c1e3e 335 break;
wac 0:7ae28d2c1e3e 336 case 0:
wac 0:7ae28d2c1e3e 337 quadcount--;
wac 0:7ae28d2c1e3e 338 break;
wac 0:7ae28d2c1e3e 339 case 1:
wac 0:7ae28d2c1e3e 340 ; // Missed a count, so do nothing
wac 0:7ae28d2c1e3e 341 break;
wac 0:7ae28d2c1e3e 342 } // switch
wac 0:7ae28d2c1e3e 343 break;
wac 0:7ae28d2c1e3e 344 case 3:
wac 0:7ae28d2c1e3e 345 switch (quadnew)
wac 0:7ae28d2c1e3e 346 {
wac 0:7ae28d2c1e3e 347 case 3:
wac 0:7ae28d2c1e3e 348 break;
wac 0:7ae28d2c1e3e 349 case 1:
wac 0:7ae28d2c1e3e 350 quadcount++;
wac 0:7ae28d2c1e3e 351 break;
wac 0:7ae28d2c1e3e 352 case 2:
wac 0:7ae28d2c1e3e 353 quadcount--;
wac 0:7ae28d2c1e3e 354 break;
wac 0:7ae28d2c1e3e 355 case 0:
wac 0:7ae28d2c1e3e 356 ; // Missed a count, so do nothing
wac 0:7ae28d2c1e3e 357 break;
wac 0:7ae28d2c1e3e 358 } // switch
wac 0:7ae28d2c1e3e 359 break;
wac 0:7ae28d2c1e3e 360 } // switch (quadold)
wac 1:fb60f76e33ee 361 quadold = quadnew; // Store current quad state
wac 0:7ae28d2c1e3e 362
wac 1:fb60f76e33ee 363 if (mode == AMPSMODE)
wac 1:fb60f76e33ee 364 {
wac 1:fb60f76e33ee 365 ampscount += (quadcountold - quadcount);
wac 1:fb60f76e33ee 366 if (ampscount > MAXAMPS200)
wac 1:fb60f76e33ee 367 ampscount = MAXAMPS200; // Clip at high end
wac 1:fb60f76e33ee 368 else if (ampscount < MINAMPSET)
wac 1:fb60f76e33ee 369 ampscount = MINAMPSET; // Clip at low end
wac 1:fb60f76e33ee 370 if (select == 2)
wac 1:fb60f76e33ee 371 {
wac 1:fb60f76e33ee 372 LEDg2 = ON; LEDg3 = OFF;
wac 1:fb60f76e33ee 373 }
wac 1:fb60f76e33ee 374 else // select == 3
wac 1:fb60f76e33ee 375 {
wac 1:fb60f76e33ee 376 LEDg2 = OFF; LEDg3 = ON;
wac 1:fb60f76e33ee 377 }
wac 1:fb60f76e33ee 378 switch (ampscount % 4) // Get 2 LSBs and display on mbed LEDs
wac 1:fb60f76e33ee 379 {
wac 1:fb60f76e33ee 380 case 0:
wac 1:fb60f76e33ee 381 led1 = 1; led2 = 0; led3 = 0; led4 = 0;
wac 1:fb60f76e33ee 382 break;
wac 1:fb60f76e33ee 383 case 1:
wac 1:fb60f76e33ee 384 led1 = 0; led2 = 1; led3 = 0; led4 = 0;
wac 1:fb60f76e33ee 385 break;
wac 1:fb60f76e33ee 386 case 2:
wac 1:fb60f76e33ee 387 led1 = 0; led2 = 0; led3 = 1; led4 = 0;
wac 1:fb60f76e33ee 388 break;
wac 1:fb60f76e33ee 389 default:
wac 1:fb60f76e33ee 390 led1 = 0; led2 = 0; led3 = 0; led4 = 1;
wac 1:fb60f76e33ee 391 break;
wac 1:fb60f76e33ee 392 } // switch
wac 1:fb60f76e33ee 393 LEDout(ampscount);
wac 1:fb60f76e33ee 394 //if (quadcount != quadcountold) pc.printf("%d amps\n\r", ampscount);
wac 1:fb60f76e33ee 395 }
wac 1:fb60f76e33ee 396 else // (mode == GASMODE)
wac 1:fb60f76e33ee 397 {
wac 1:fb60f76e33ee 398 gascount += (quadcountold - quadcount);
wac 1:fb60f76e33ee 399 if (gascount > MAXGASPRESS)
wac 1:fb60f76e33ee 400 gascount = MAXGASPRESS; // Clip at high end
wac 1:fb60f76e33ee 401 else if (gascount < MINGASPRESS)
wac 1:fb60f76e33ee 402 gascount = MINGASPRESS; // Clip at low end
wac 1:fb60f76e33ee 403 // Update mbed LEDs to simulate gas selection
wac 1:fb60f76e33ee 404 switch (gasselect)
wac 1:fb60f76e33ee 405 {
wac 1:fb60f76e33ee 406 case 1: {
wac 1:fb60f76e33ee 407 led1 = 1; led2 = 0; led3 = 0; led4 = 0; }
wac 1:fb60f76e33ee 408 break;
wac 1:fb60f76e33ee 409 case 2: {
wac 1:fb60f76e33ee 410 led1 = 0; led2 = 1; led3 = 0; led4 = 0;
wac 1:fb60f76e33ee 411 LEDg2 = ON; LEDg3 = OFF; }
wac 1:fb60f76e33ee 412 break;
wac 1:fb60f76e33ee 413 case 3: {
wac 1:fb60f76e33ee 414 led1 = 0; led2 = 0; led3 = 1; led4 = 0;
wac 1:fb60f76e33ee 415 LEDg2 = OFF; LEDg3 = ON; }
wac 1:fb60f76e33ee 416 break;
wac 1:fb60f76e33ee 417 default: { // gasselect == 4
wac 1:fb60f76e33ee 418 led1 = 0; led2 = 0; led3 = 0; led4 = 1; }
wac 1:fb60f76e33ee 419 break;
wac 1:fb60f76e33ee 420 }
wac 1:fb60f76e33ee 421 LEDout(gascount);
wac 1:fb60f76e33ee 422 //if (quadcount != quadcountold) pc.printf("%d psi\n\r", gascount);
wac 1:fb60f76e33ee 423 } // if (mode == GASMODE)
wac 0:7ae28d2c1e3e 424 } // sampleswitches()
wac 0:7ae28d2c1e3e 425
wac 0:7ae28d2c1e3e 426 int main()
wac 0:7ae28d2c1e3e 427 {
wac 1:fb60f76e33ee 428 pc.baud(19200);
wac 1:fb60f76e33ee 429 pc.printf("\n\rConnected to mBed...\r\n");
wac 1:fb60f76e33ee 430
wac 0:7ae28d2c1e3e 431 /****** Program Starts Here *******/
wac 0:7ae28d2c1e3e 432 // Initialize variables
wac 0:7ae28d2c1e3e 433 quadnew = getquad(); // Get initial quadrature state
wac 1:fb60f76e33ee 434 quadold = quadnew; // Initialize state variables
wac 1:fb60f76e33ee 435 quadswitchold = OFF; // Initialize state variables
wac 1:fb60f76e33ee 436 mode = AMPSMODE; // Power up in AMPS selection mode
wac 1:fb60f76e33ee 437 modetimer.stop();
wac 1:fb60f76e33ee 438 modetimer.reset();
wac 1:fb60f76e33ee 439 modechanged = FALSE; // Initialize state variables
wac 1:fb60f76e33ee 440 select = 1; // Default discrete LED selection
wac 0:7ae28d2c1e3e 441 gasselect = 1;
wac 1:fb60f76e33ee 442 quada.mode(PullUp); // Enable pullup resistors on switch inputs
wac 1:fb60f76e33ee 443 quadb.mode(PullUp);
wac 1:fb60f76e33ee 444 quadsw.mode(PullUp);
wac 1:fb60f76e33ee 445
wac 1:fb60f76e33ee 446 ampscount = MAXAMPS200;
wac 1:fb60f76e33ee 447 gascount = STARTGASPRESS;
wac 0:7ae28d2c1e3e 448
wac 0:7ae28d2c1e3e 449 // Turn off all LEDs first, and let sampleswitches update everything
wac 1:fb60f76e33ee 450 LED1a = OFF; LED1b = OFF; LED1c = OFF; LED1d = OFF; LED1e = OFF; LED1f = OFF; LED1g = OFF;
wac 1:fb60f76e33ee 451 LED2a = OFF; LED2b = OFF; LED2c = OFF; LED2d = OFF; LED2e = OFF; LED2f = OFF; LED2g = OFF;
wac 1:fb60f76e33ee 452 LED3a = OFF; LED3b = OFF; LED3c = OFF; LED3d = OFF; LED3e = OFF; LED3f = OFF; LED3g = OFF;
wac 1:fb60f76e33ee 453 LEDg2 = OFF; LEDg3 = OFF;
wac 0:7ae28d2c1e3e 454
wac 0:7ae28d2c1e3e 455 // Set up interrupt call
wac 1:fb60f76e33ee 456 getswitches.attach_us(&sampleswitches, 10000); // setup getswitches to call sampleswitches every 10 ms
wac 0:7ae28d2c1e3e 457
wac 0:7ae28d2c1e3e 458 while (1)
wac 0:7ae28d2c1e3e 459 {
wac 0:7ae28d2c1e3e 460 }// while (1)
wac 0:7ae28d2c1e3e 461
wac 0:7ae28d2c1e3e 462 } // main()