avnish aggarwal
/
bootcamp-appdesign
evolution
main.cpp@1:02e0c04d84d3, 2014-02-05 (annotated)
- Committer:
- avnisha
- Date:
- Wed Feb 05 04:33:33 2014 +0000
- Revision:
- 1:02e0c04d84d3
- Parent:
- 0:f25a61b099e5
ok
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
avnisha | 0:f25a61b099e5 | 1 | #include "mbed.h" |
avnisha | 0:f25a61b099e5 | 2 | |
avnisha | 0:f25a61b099e5 | 3 | |
avnisha | 0:f25a61b099e5 | 4 | /* |
avnisha | 1:02e0c04d84d3 | 5 | * Based on |
avnisha | 1:02e0c04d84d3 | 6 | * |
avnisha | 1:02e0c04d84d3 | 7 | * http://mbed.org/users/AjK/notebook/regarding-interrupts-use-and-blocking/?c=9228 |
avnisha | 1:02e0c04d84d3 | 8 | */ |
avnisha | 1:02e0c04d84d3 | 9 | |
avnisha | 1:02e0c04d84d3 | 10 | |
avnisha | 1:02e0c04d84d3 | 11 | /* |
avnisha | 1:02e0c04d84d3 | 12 | |
avnisha | 1:02e0c04d84d3 | 13 | Specification: |
avnisha | 1:02e0c04d84d3 | 14 | |
avnisha | 1:02e0c04d84d3 | 15 | led1: flash briefly once per second, EVERY second. |
avnisha | 1:02e0c04d84d3 | 16 | led2: On at t = 2 and off at t = 5 |
avnisha | 1:02e0c04d84d3 | 17 | led3: On at t = 3 and off at t = 6 |
avnisha | 0:f25a61b099e5 | 18 | */ |
avnisha | 0:f25a61b099e5 | 19 | |
avnisha | 1:02e0c04d84d3 | 20 | #define SIX |
avnisha | 0:f25a61b099e5 | 21 | |
avnisha | 0:f25a61b099e5 | 22 | #ifdef ONE |
avnisha | 1:02e0c04d84d3 | 23 | /* |
avnisha | 1:02e0c04d84d3 | 24 | * Basic processing looping |
avnisha | 1:02e0c04d84d3 | 25 | * |
avnisha | 1:02e0c04d84d3 | 26 | * Good - simple to write/debug |
avnisha | 1:02e0c04d84d3 | 27 | * Bad - not so simple to add led2/led3 without some state machine logic and timer polling |
avnisha | 1:02e0c04d84d3 | 28 | */ |
avnisha | 1:02e0c04d84d3 | 29 | |
avnisha | 0:f25a61b099e5 | 30 | |
avnisha | 0:f25a61b099e5 | 31 | DigitalOut led1(LED1); |
avnisha | 0:f25a61b099e5 | 32 | |
avnisha | 0:f25a61b099e5 | 33 | int main() { |
avnisha | 0:f25a61b099e5 | 34 | while(1) { |
avnisha | 0:f25a61b099e5 | 35 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 36 | wait(0.2); |
avnisha | 0:f25a61b099e5 | 37 | led1 = 0; |
avnisha | 0:f25a61b099e5 | 38 | wait(0.2); |
avnisha | 0:f25a61b099e5 | 39 | } |
avnisha | 0:f25a61b099e5 | 40 | } |
avnisha | 0:f25a61b099e5 | 41 | |
avnisha | 0:f25a61b099e5 | 42 | #endif |
avnisha | 0:f25a61b099e5 | 43 | |
avnisha | 0:f25a61b099e5 | 44 | #ifdef TWO |
avnisha | 1:02e0c04d84d3 | 45 | |
avnisha | 1:02e0c04d84d3 | 46 | /* |
avnisha | 1:02e0c04d84d3 | 47 | * Event driven logic and loop together |
avnisha | 1:02e0c04d84d3 | 48 | * |
avnisha | 1:02e0c04d84d3 | 49 | * Good - led2 is getting serviced by callback |
avnisha | 1:02e0c04d84d3 | 50 | * Bad - led1 will missing some flashes due to wait() in callback |
avnisha | 1:02e0c04d84d3 | 51 | * |
avnisha | 1:02e0c04d84d3 | 52 | */ |
avnisha | 0:f25a61b099e5 | 53 | |
avnisha | 0:f25a61b099e5 | 54 | Timeout to1; |
avnisha | 0:f25a61b099e5 | 55 | DigitalOut led1(LED1); |
avnisha | 0:f25a61b099e5 | 56 | DigitalOut led2(LED2); |
avnisha | 0:f25a61b099e5 | 57 | |
avnisha | 0:f25a61b099e5 | 58 | void cb1(void) { |
avnisha | 0:f25a61b099e5 | 59 | led2 = 1; |
avnisha | 0:f25a61b099e5 | 60 | wait(3); |
avnisha | 0:f25a61b099e5 | 61 | led2 = 0; |
avnisha | 0:f25a61b099e5 | 62 | } |
avnisha | 0:f25a61b099e5 | 63 | |
avnisha | 0:f25a61b099e5 | 64 | int main() { |
avnisha | 0:f25a61b099e5 | 65 | |
avnisha | 0:f25a61b099e5 | 66 | to1.attach(&cb1, 2); |
avnisha | 0:f25a61b099e5 | 67 | |
avnisha | 0:f25a61b099e5 | 68 | while(1) { |
avnisha | 0:f25a61b099e5 | 69 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 70 | wait(0.05); |
avnisha | 0:f25a61b099e5 | 71 | led1 = 0; |
avnisha | 0:f25a61b099e5 | 72 | wait(0.95); |
avnisha | 0:f25a61b099e5 | 73 | } |
avnisha | 0:f25a61b099e5 | 74 | } |
avnisha | 0:f25a61b099e5 | 75 | |
avnisha | 0:f25a61b099e5 | 76 | #endif |
avnisha | 0:f25a61b099e5 | 77 | #ifdef THREE |
avnisha | 1:02e0c04d84d3 | 78 | |
avnisha | 1:02e0c04d84d3 | 79 | /* |
avnisha | 1:02e0c04d84d3 | 80 | * Good - led1/led2/led3 all getting serviced |
avnisha | 1:02e0c04d84d3 | 81 | * Bad - timing off on led3 since that callback has to wait for previous callback to finish |
avnisha | 1:02e0c04d84d3 | 82 | * - timing off on led1 due to both callbacks wait() |
avnisha | 1:02e0c04d84d3 | 83 | */ |
avnisha | 1:02e0c04d84d3 | 84 | |
avnisha | 0:f25a61b099e5 | 85 | |
avnisha | 0:f25a61b099e5 | 86 | Timeout to1; |
avnisha | 0:f25a61b099e5 | 87 | Timeout to2; |
avnisha | 0:f25a61b099e5 | 88 | DigitalOut led1(LED1); |
avnisha | 0:f25a61b099e5 | 89 | DigitalOut led2(LED2); |
avnisha | 0:f25a61b099e5 | 90 | DigitalOut led3(LED3); |
avnisha | 0:f25a61b099e5 | 91 | |
avnisha | 0:f25a61b099e5 | 92 | void cb1(void) { |
avnisha | 0:f25a61b099e5 | 93 | led2 = 1; |
avnisha | 0:f25a61b099e5 | 94 | wait(3); |
avnisha | 0:f25a61b099e5 | 95 | led2 = 0; |
avnisha | 0:f25a61b099e5 | 96 | } |
avnisha | 0:f25a61b099e5 | 97 | |
avnisha | 0:f25a61b099e5 | 98 | void cb2(void) { |
avnisha | 0:f25a61b099e5 | 99 | led3 = 1; |
avnisha | 0:f25a61b099e5 | 100 | wait(3); |
avnisha | 0:f25a61b099e5 | 101 | led3 = 0; |
avnisha | 0:f25a61b099e5 | 102 | } |
avnisha | 0:f25a61b099e5 | 103 | |
avnisha | 0:f25a61b099e5 | 104 | int main() { |
avnisha | 0:f25a61b099e5 | 105 | |
avnisha | 0:f25a61b099e5 | 106 | to1.attach(&cb1, 2); |
avnisha | 0:f25a61b099e5 | 107 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 108 | |
avnisha | 0:f25a61b099e5 | 109 | while(1) { |
avnisha | 0:f25a61b099e5 | 110 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 111 | wait(0.05); |
avnisha | 0:f25a61b099e5 | 112 | led1 = 0; |
avnisha | 0:f25a61b099e5 | 113 | wait(0.95); |
avnisha | 0:f25a61b099e5 | 114 | } |
avnisha | 0:f25a61b099e5 | 115 | } |
avnisha | 0:f25a61b099e5 | 116 | #endif |
avnisha | 0:f25a61b099e5 | 117 | |
avnisha | 0:f25a61b099e5 | 118 | #ifdef FOUR |
avnisha | 0:f25a61b099e5 | 119 | |
avnisha | 1:02e0c04d84d3 | 120 | /* |
avnisha | 1:02e0c04d84d3 | 121 | * Good - Use gloabls to coordinate callback/main loop - no wait() in callback |
avnisha | 1:02e0c04d84d3 | 122 | * Bad - led1 uses wait() making it less effective for polling other devices |
avnisha | 1:02e0c04d84d3 | 123 | */ |
avnisha | 1:02e0c04d84d3 | 124 | |
avnisha | 0:f25a61b099e5 | 125 | |
avnisha | 0:f25a61b099e5 | 126 | Timeout to1; |
avnisha | 0:f25a61b099e5 | 127 | Timeout to2; |
avnisha | 0:f25a61b099e5 | 128 | DigitalOut led1(LED1); |
avnisha | 0:f25a61b099e5 | 129 | DigitalOut to1_led(LED2); |
avnisha | 0:f25a61b099e5 | 130 | DigitalOut to2_led(LED3); |
avnisha | 0:f25a61b099e5 | 131 | |
avnisha | 0:f25a61b099e5 | 132 | bool to1triggered = false; |
avnisha | 0:f25a61b099e5 | 133 | bool to2triggered = false; |
avnisha | 0:f25a61b099e5 | 134 | |
avnisha | 0:f25a61b099e5 | 135 | void cb1(void) { |
avnisha | 0:f25a61b099e5 | 136 | to1triggered = true; |
avnisha | 0:f25a61b099e5 | 137 | } |
avnisha | 0:f25a61b099e5 | 138 | |
avnisha | 0:f25a61b099e5 | 139 | void to1handle(void) { |
avnisha | 0:f25a61b099e5 | 140 | if (to1_led == 0) { |
avnisha | 0:f25a61b099e5 | 141 | to1_led = 1; |
avnisha | 0:f25a61b099e5 | 142 | to1.detach(); |
avnisha | 0:f25a61b099e5 | 143 | to1.attach(&cb1, 3); |
avnisha | 0:f25a61b099e5 | 144 | } |
avnisha | 0:f25a61b099e5 | 145 | else { |
avnisha | 0:f25a61b099e5 | 146 | to1_led = 0; |
avnisha | 0:f25a61b099e5 | 147 | to1.detach(); |
avnisha | 0:f25a61b099e5 | 148 | } |
avnisha | 0:f25a61b099e5 | 149 | } |
avnisha | 0:f25a61b099e5 | 150 | |
avnisha | 0:f25a61b099e5 | 151 | |
avnisha | 0:f25a61b099e5 | 152 | void cb2(void) { |
avnisha | 0:f25a61b099e5 | 153 | to2triggered = true; |
avnisha | 0:f25a61b099e5 | 154 | } |
avnisha | 0:f25a61b099e5 | 155 | |
avnisha | 0:f25a61b099e5 | 156 | void to2handle(void) { |
avnisha | 0:f25a61b099e5 | 157 | if (to2_led == 0) { |
avnisha | 0:f25a61b099e5 | 158 | to2_led = 1; |
avnisha | 0:f25a61b099e5 | 159 | to2.detach(); |
avnisha | 0:f25a61b099e5 | 160 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 161 | } |
avnisha | 0:f25a61b099e5 | 162 | else { |
avnisha | 0:f25a61b099e5 | 163 | to2_led = 0; |
avnisha | 0:f25a61b099e5 | 164 | to2.detach(); |
avnisha | 0:f25a61b099e5 | 165 | } |
avnisha | 0:f25a61b099e5 | 166 | } |
avnisha | 0:f25a61b099e5 | 167 | |
avnisha | 0:f25a61b099e5 | 168 | |
avnisha | 0:f25a61b099e5 | 169 | int main() { |
avnisha | 0:f25a61b099e5 | 170 | |
avnisha | 0:f25a61b099e5 | 171 | to1.attach(&cb1, 2); |
avnisha | 0:f25a61b099e5 | 172 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 173 | |
avnisha | 0:f25a61b099e5 | 174 | while(1) { |
avnisha | 0:f25a61b099e5 | 175 | |
avnisha | 0:f25a61b099e5 | 176 | if (to1triggered) { |
avnisha | 0:f25a61b099e5 | 177 | to1triggered = false; |
avnisha | 0:f25a61b099e5 | 178 | to1handle(); |
avnisha | 0:f25a61b099e5 | 179 | } |
avnisha | 0:f25a61b099e5 | 180 | |
avnisha | 0:f25a61b099e5 | 181 | if (to2triggered) { |
avnisha | 0:f25a61b099e5 | 182 | to2triggered = false; |
avnisha | 0:f25a61b099e5 | 183 | to2handle(); |
avnisha | 0:f25a61b099e5 | 184 | } |
avnisha | 0:f25a61b099e5 | 185 | |
avnisha | 0:f25a61b099e5 | 186 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 187 | wait(0.05); |
avnisha | 0:f25a61b099e5 | 188 | led1 = 0; |
avnisha | 0:f25a61b099e5 | 189 | wait(0.95); |
avnisha | 0:f25a61b099e5 | 190 | } |
avnisha | 0:f25a61b099e5 | 191 | } |
avnisha | 0:f25a61b099e5 | 192 | |
avnisha | 0:f25a61b099e5 | 193 | #endif |
avnisha | 0:f25a61b099e5 | 194 | |
avnisha | 1:02e0c04d84d3 | 195 | #ifdef FIVE |
avnisha | 1:02e0c04d84d3 | 196 | |
avnisha | 1:02e0c04d84d3 | 197 | /* |
avnisha | 1:02e0c04d84d3 | 198 | * Good - all led's are callback interrupt driven |
avnisha | 1:02e0c04d84d3 | 199 | * Bad - printf() in callback (interrupt context) bad idea |
avnisha | 1:02e0c04d84d3 | 200 | */ |
avnisha | 0:f25a61b099e5 | 201 | |
avnisha | 0:f25a61b099e5 | 202 | #include "mbed.h" |
avnisha | 0:f25a61b099e5 | 203 | |
avnisha | 0:f25a61b099e5 | 204 | Ticker tled1on; |
avnisha | 0:f25a61b099e5 | 205 | Timeout tled1off; |
avnisha | 0:f25a61b099e5 | 206 | Timeout to1; |
avnisha | 0:f25a61b099e5 | 207 | Timeout to2; |
avnisha | 0:f25a61b099e5 | 208 | DigitalOut led1(LED1); |
avnisha | 0:f25a61b099e5 | 209 | DigitalOut to1_led(LED2); |
avnisha | 0:f25a61b099e5 | 210 | DigitalOut to2_led(LED3); |
avnisha | 0:f25a61b099e5 | 211 | |
avnisha | 0:f25a61b099e5 | 212 | void cb1(void) { |
avnisha | 0:f25a61b099e5 | 213 | if (to1_led == 0) { |
avnisha | 0:f25a61b099e5 | 214 | to1_led = 1; |
avnisha | 0:f25a61b099e5 | 215 | } |
avnisha | 0:f25a61b099e5 | 216 | else { |
avnisha | 0:f25a61b099e5 | 217 | to1_led = 0; |
avnisha | 0:f25a61b099e5 | 218 | } |
avnisha | 0:f25a61b099e5 | 219 | // Reschedule a new event. |
avnisha | 1:02e0c04d84d3 | 220 | printf("cb1 callback\n"); |
avnisha | 0:f25a61b099e5 | 221 | to1.detach(); |
avnisha | 0:f25a61b099e5 | 222 | to1.attach(&cb1, 3); |
avnisha | 0:f25a61b099e5 | 223 | } |
avnisha | 0:f25a61b099e5 | 224 | |
avnisha | 0:f25a61b099e5 | 225 | void cb2(void) { |
avnisha | 0:f25a61b099e5 | 226 | if (to2_led == 0) { |
avnisha | 0:f25a61b099e5 | 227 | to2_led = 1; |
avnisha | 0:f25a61b099e5 | 228 | } |
avnisha | 0:f25a61b099e5 | 229 | else { |
avnisha | 0:f25a61b099e5 | 230 | to2_led = 0; |
avnisha | 0:f25a61b099e5 | 231 | } |
avnisha | 0:f25a61b099e5 | 232 | // Reschedule a new event. |
avnisha | 0:f25a61b099e5 | 233 | to2.detach(); |
avnisha | 0:f25a61b099e5 | 234 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 235 | } |
avnisha | 0:f25a61b099e5 | 236 | |
avnisha | 0:f25a61b099e5 | 237 | void tled1off_cb(void) { |
avnisha | 0:f25a61b099e5 | 238 | led1 = 0; |
avnisha | 0:f25a61b099e5 | 239 | } |
avnisha | 0:f25a61b099e5 | 240 | |
avnisha | 0:f25a61b099e5 | 241 | void tled1on_cb(void) { |
avnisha | 0:f25a61b099e5 | 242 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 243 | tled1off.detach(); |
avnisha | 0:f25a61b099e5 | 244 | tled1off.attach(&tled1off_cb, 0.05); |
avnisha | 0:f25a61b099e5 | 245 | } |
avnisha | 0:f25a61b099e5 | 246 | |
avnisha | 0:f25a61b099e5 | 247 | int main() { |
avnisha | 0:f25a61b099e5 | 248 | |
avnisha | 0:f25a61b099e5 | 249 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 250 | tled1off.attach(&tled1on_cb, 0.05); |
avnisha | 0:f25a61b099e5 | 251 | tled1on.attach(&tled1on_cb, 1); |
avnisha | 0:f25a61b099e5 | 252 | to1.attach(&cb1, 2); |
avnisha | 0:f25a61b099e5 | 253 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 254 | |
avnisha | 0:f25a61b099e5 | 255 | while(1) { |
avnisha | 1:02e0c04d84d3 | 256 | // Calculate PI here as we have so much time |
avnisha | 0:f25a61b099e5 | 257 | } |
avnisha | 0:f25a61b099e5 | 258 | } |
avnisha | 0:f25a61b099e5 | 259 | |
avnisha | 0:f25a61b099e5 | 260 | #endif |
avnisha | 0:f25a61b099e5 | 261 | |
avnisha | 1:02e0c04d84d3 | 262 | #ifdef SIX |
avnisha | 1:02e0c04d84d3 | 263 | |
avnisha | 1:02e0c04d84d3 | 264 | /* |
avnisha | 1:02e0c04d84d3 | 265 | * Final version ... event driven for LED's |
avnisha | 1:02e0c04d84d3 | 266 | */ |
avnisha | 0:f25a61b099e5 | 267 | |
avnisha | 0:f25a61b099e5 | 268 | Ticker tled1on; |
avnisha | 0:f25a61b099e5 | 269 | Timeout tled1off; |
avnisha | 0:f25a61b099e5 | 270 | Timeout to1; |
avnisha | 0:f25a61b099e5 | 271 | Timeout to2; |
avnisha | 0:f25a61b099e5 | 272 | DigitalOut led1(LED1); |
avnisha | 0:f25a61b099e5 | 273 | DigitalOut to1_led(LED2); |
avnisha | 0:f25a61b099e5 | 274 | DigitalOut to2_led(LED3); |
avnisha | 0:f25a61b099e5 | 275 | |
avnisha | 0:f25a61b099e5 | 276 | void cb1(void) { |
avnisha | 0:f25a61b099e5 | 277 | if (to1_led == 0) { |
avnisha | 0:f25a61b099e5 | 278 | to1_led = 1; |
avnisha | 0:f25a61b099e5 | 279 | } |
avnisha | 0:f25a61b099e5 | 280 | else { |
avnisha | 0:f25a61b099e5 | 281 | to1_led = 0; |
avnisha | 0:f25a61b099e5 | 282 | } |
avnisha | 0:f25a61b099e5 | 283 | |
avnisha | 0:f25a61b099e5 | 284 | |
avnisha | 0:f25a61b099e5 | 285 | // Reschedule a new event. |
avnisha | 0:f25a61b099e5 | 286 | to1.detach(); |
avnisha | 0:f25a61b099e5 | 287 | to1.attach(&cb1, 3); |
avnisha | 0:f25a61b099e5 | 288 | } |
avnisha | 0:f25a61b099e5 | 289 | |
avnisha | 0:f25a61b099e5 | 290 | void cb2(void) { |
avnisha | 0:f25a61b099e5 | 291 | if (to2_led == 0) { |
avnisha | 0:f25a61b099e5 | 292 | to2_led = 1; |
avnisha | 0:f25a61b099e5 | 293 | } |
avnisha | 0:f25a61b099e5 | 294 | else { |
avnisha | 0:f25a61b099e5 | 295 | to2_led = 0; |
avnisha | 0:f25a61b099e5 | 296 | } |
avnisha | 0:f25a61b099e5 | 297 | // Reschedule a new event. |
avnisha | 0:f25a61b099e5 | 298 | to2.detach(); |
avnisha | 0:f25a61b099e5 | 299 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 300 | } |
avnisha | 0:f25a61b099e5 | 301 | |
avnisha | 0:f25a61b099e5 | 302 | void tled1off_cb(void) { |
avnisha | 0:f25a61b099e5 | 303 | led1 = 0; |
avnisha | 0:f25a61b099e5 | 304 | } |
avnisha | 0:f25a61b099e5 | 305 | |
avnisha | 0:f25a61b099e5 | 306 | void tled1on_cb(void) { |
avnisha | 0:f25a61b099e5 | 307 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 308 | tled1off.detach(); |
avnisha | 0:f25a61b099e5 | 309 | tled1off.attach(&tled1off_cb, 0.05); |
avnisha | 0:f25a61b099e5 | 310 | } |
avnisha | 0:f25a61b099e5 | 311 | |
avnisha | 0:f25a61b099e5 | 312 | int main() { |
avnisha | 0:f25a61b099e5 | 313 | |
avnisha | 0:f25a61b099e5 | 314 | led1 = 1; |
avnisha | 0:f25a61b099e5 | 315 | tled1off.attach(&tled1on_cb, 0.05); |
avnisha | 0:f25a61b099e5 | 316 | tled1on.attach(&tled1on_cb, 1); |
avnisha | 0:f25a61b099e5 | 317 | to1.attach(&cb1, 2); |
avnisha | 0:f25a61b099e5 | 318 | to2.attach(&cb2, 3); |
avnisha | 0:f25a61b099e5 | 319 | |
avnisha | 0:f25a61b099e5 | 320 | while(1) { |
avnisha | 0:f25a61b099e5 | 321 | // Calculate PI here as we have so much time :) |
avnisha | 1:02e0c04d84d3 | 322 | printf("main loop\n"); |
avnisha | 0:f25a61b099e5 | 323 | } |
avnisha | 0:f25a61b099e5 | 324 | } |
avnisha | 0:f25a61b099e5 | 325 | |
avnisha | 0:f25a61b099e5 | 326 | #endif |
avnisha | 0:f25a61b099e5 | 327 |