Jiwen Cai
/
HW2-1
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main.cpp@0:71adeb0ac6a2, 2010-11-30 (annotated)
- Committer:
- goodcjw
- Date:
- Tue Nov 30 23:52:14 2010 +0000
- Revision:
- 0:71adeb0ac6a2
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| goodcjw | 0:71adeb0ac6a2 | 1 | #include "mbed.h" |
| goodcjw | 0:71adeb0ac6a2 | 2 | |
| goodcjw | 0:71adeb0ac6a2 | 3 | #define NBUFF 10 |
| goodcjw | 0:71adeb0ac6a2 | 4 | |
| goodcjw | 0:71adeb0ac6a2 | 5 | typedef enum {s_0, s_HI, s_HE, s_WD, s_WI, s_TE, s_M} State_t; |
| goodcjw | 0:71adeb0ac6a2 | 6 | typedef enum {e_InvalidInput, e_ValidInput, e_DetectMatch, e_Start, e_1, e_0, e_E} Event_t; |
| goodcjw | 0:71adeb0ac6a2 | 7 | |
| goodcjw | 0:71adeb0ac6a2 | 8 | int touchSense_1(void); |
| goodcjw | 0:71adeb0ac6a2 | 9 | int touchSense_2(void); |
| goodcjw | 0:71adeb0ac6a2 | 10 | void handleEvent(Event_t ev); |
| goodcjw | 0:71adeb0ac6a2 | 11 | void entry_HI(); |
| goodcjw | 0:71adeb0ac6a2 | 12 | void entry_HE(); |
| goodcjw | 0:71adeb0ac6a2 | 13 | void entry_WD(); |
| goodcjw | 0:71adeb0ac6a2 | 14 | void entry_WI(); |
| goodcjw | 0:71adeb0ac6a2 | 15 | void entry_TE(); |
| goodcjw | 0:71adeb0ac6a2 | 16 | void entry_M(); |
| goodcjw | 0:71adeb0ac6a2 | 17 | char readTouchInput(); |
| goodcjw | 0:71adeb0ac6a2 | 18 | |
| goodcjw | 0:71adeb0ac6a2 | 19 | DigitalOut myled_1(LED1); |
| goodcjw | 0:71adeb0ac6a2 | 20 | DigitalOut myled_2(LED2); |
| goodcjw | 0:71adeb0ac6a2 | 21 | AnalogIn input_1(p17); |
| goodcjw | 0:71adeb0ac6a2 | 22 | AnalogIn input_2(p20); |
| goodcjw | 0:71adeb0ac6a2 | 23 | DigitalIn charger_1(p16); |
| goodcjw | 0:71adeb0ac6a2 | 24 | DigitalIn charger_2(p19); |
| goodcjw | 0:71adeb0ac6a2 | 25 | DigitalOut ground_1(p15); |
| goodcjw | 0:71adeb0ac6a2 | 26 | DigitalOut ground_2(p18); |
| goodcjw | 0:71adeb0ac6a2 | 27 | Serial pc(USBTX, USBRX); // tx, rx |
| goodcjw | 0:71adeb0ac6a2 | 28 | |
| goodcjw | 0:71adeb0ac6a2 | 29 | State_t state; |
| goodcjw | 0:71adeb0ac6a2 | 30 | Event_t currentEv; |
| goodcjw | 0:71adeb0ac6a2 | 31 | char trigger[128]; |
| goodcjw | 0:71adeb0ac6a2 | 32 | int tr_len, tr_pos; |
| goodcjw | 0:71adeb0ac6a2 | 33 | |
| goodcjw | 0:71adeb0ac6a2 | 34 | int buff_1, buff_2; |
| goodcjw | 0:71adeb0ac6a2 | 35 | int last_1, last_2; |
| goodcjw | 0:71adeb0ac6a2 | 36 | |
| goodcjw | 0:71adeb0ac6a2 | 37 | int main() { |
| goodcjw | 0:71adeb0ac6a2 | 38 | state = s_0; |
| goodcjw | 0:71adeb0ac6a2 | 39 | currentEv = e_Start; |
| goodcjw | 0:71adeb0ac6a2 | 40 | trigger[0] = '\0'; |
| goodcjw | 0:71adeb0ac6a2 | 41 | tr_len = 0; |
| goodcjw | 0:71adeb0ac6a2 | 42 | while (1) { |
| goodcjw | 0:71adeb0ac6a2 | 43 | handleEvent(currentEv); |
| goodcjw | 0:71adeb0ac6a2 | 44 | } |
| goodcjw | 0:71adeb0ac6a2 | 45 | } |
| goodcjw | 0:71adeb0ac6a2 | 46 | |
| goodcjw | 0:71adeb0ac6a2 | 47 | int touchSense_1(void) { |
| goodcjw | 0:71adeb0ac6a2 | 48 | float sample; |
| goodcjw | 0:71adeb0ac6a2 | 49 | ground_1 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 50 | charger_1.mode(PullUp); |
| goodcjw | 0:71adeb0ac6a2 | 51 | charger_1.mode(PullNone); |
| goodcjw | 0:71adeb0ac6a2 | 52 | sample=input_1.read(); |
| goodcjw | 0:71adeb0ac6a2 | 53 | if (sample < 0.3) { |
| goodcjw | 0:71adeb0ac6a2 | 54 | return 1; |
| goodcjw | 0:71adeb0ac6a2 | 55 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 56 | return 0; |
| goodcjw | 0:71adeb0ac6a2 | 57 | } |
| goodcjw | 0:71adeb0ac6a2 | 58 | } |
| goodcjw | 0:71adeb0ac6a2 | 59 | |
| goodcjw | 0:71adeb0ac6a2 | 60 | int touchSense_2(void) { |
| goodcjw | 0:71adeb0ac6a2 | 61 | float sample; |
| goodcjw | 0:71adeb0ac6a2 | 62 | ground_2 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 63 | charger_2.mode(PullUp); |
| goodcjw | 0:71adeb0ac6a2 | 64 | charger_2.mode(PullNone); |
| goodcjw | 0:71adeb0ac6a2 | 65 | sample=input_2.read(); |
| goodcjw | 0:71adeb0ac6a2 | 66 | if (sample < 0.3) { |
| goodcjw | 0:71adeb0ac6a2 | 67 | return 1; |
| goodcjw | 0:71adeb0ac6a2 | 68 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 69 | return 0; |
| goodcjw | 0:71adeb0ac6a2 | 70 | } |
| goodcjw | 0:71adeb0ac6a2 | 71 | } |
| goodcjw | 0:71adeb0ac6a2 | 72 | |
| goodcjw | 0:71adeb0ac6a2 | 73 | void emitEvent(Event_t ev) { |
| goodcjw | 0:71adeb0ac6a2 | 74 | currentEv = ev; |
| goodcjw | 0:71adeb0ac6a2 | 75 | } |
| goodcjw | 0:71adeb0ac6a2 | 76 | |
| goodcjw | 0:71adeb0ac6a2 | 77 | void handleEvent(Event_t ev) { |
| goodcjw | 0:71adeb0ac6a2 | 78 | switch (state) { |
| goodcjw | 0:71adeb0ac6a2 | 79 | case s_0: |
| goodcjw | 0:71adeb0ac6a2 | 80 | if (ev == e_Start) { |
| goodcjw | 0:71adeb0ac6a2 | 81 | state = s_HI; |
| goodcjw | 0:71adeb0ac6a2 | 82 | entry_HI(); |
| goodcjw | 0:71adeb0ac6a2 | 83 | } |
| goodcjw | 0:71adeb0ac6a2 | 84 | break; |
| goodcjw | 0:71adeb0ac6a2 | 85 | case s_HI: |
| goodcjw | 0:71adeb0ac6a2 | 86 | if (ev == e_ValidInput) { |
| goodcjw | 0:71adeb0ac6a2 | 87 | state = s_WD; |
| goodcjw | 0:71adeb0ac6a2 | 88 | entry_WD(); |
| goodcjw | 0:71adeb0ac6a2 | 89 | } else if (ev == e_InvalidInput) { |
| goodcjw | 0:71adeb0ac6a2 | 90 | state = s_HE; |
| goodcjw | 0:71adeb0ac6a2 | 91 | entry_HE(); |
| goodcjw | 0:71adeb0ac6a2 | 92 | } |
| goodcjw | 0:71adeb0ac6a2 | 93 | break; |
| goodcjw | 0:71adeb0ac6a2 | 94 | case s_HE: |
| goodcjw | 0:71adeb0ac6a2 | 95 | state = s_0; |
| goodcjw | 0:71adeb0ac6a2 | 96 | break; |
| goodcjw | 0:71adeb0ac6a2 | 97 | case s_WD: |
| goodcjw | 0:71adeb0ac6a2 | 98 | if (ev == e_0 || ev == e_1) { |
| goodcjw | 0:71adeb0ac6a2 | 99 | entry_WD(); |
| goodcjw | 0:71adeb0ac6a2 | 100 | } else if (ev == e_E) { |
| goodcjw | 0:71adeb0ac6a2 | 101 | state = s_WI; |
| goodcjw | 0:71adeb0ac6a2 | 102 | entry_WI(); |
| goodcjw | 0:71adeb0ac6a2 | 103 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 104 | state = s_HE; |
| goodcjw | 0:71adeb0ac6a2 | 105 | entry_HE(); |
| goodcjw | 0:71adeb0ac6a2 | 106 | } |
| goodcjw | 0:71adeb0ac6a2 | 107 | break; |
| goodcjw | 0:71adeb0ac6a2 | 108 | case s_WI: |
| goodcjw | 0:71adeb0ac6a2 | 109 | if (ev == e_InvalidInput) { |
| goodcjw | 0:71adeb0ac6a2 | 110 | state = s_TE; |
| goodcjw | 0:71adeb0ac6a2 | 111 | entry_TE(); |
| goodcjw | 0:71adeb0ac6a2 | 112 | } else if (ev == e_DetectMatch) { |
| goodcjw | 0:71adeb0ac6a2 | 113 | state = s_M; |
| goodcjw | 0:71adeb0ac6a2 | 114 | entry_M(); |
| goodcjw | 0:71adeb0ac6a2 | 115 | } |
| goodcjw | 0:71adeb0ac6a2 | 116 | break; |
| goodcjw | 0:71adeb0ac6a2 | 117 | case s_TE: |
| goodcjw | 0:71adeb0ac6a2 | 118 | state = s_0; |
| goodcjw | 0:71adeb0ac6a2 | 119 | break; |
| goodcjw | 0:71adeb0ac6a2 | 120 | case s_M: |
| goodcjw | 0:71adeb0ac6a2 | 121 | state = s_0; |
| goodcjw | 0:71adeb0ac6a2 | 122 | break; |
| goodcjw | 0:71adeb0ac6a2 | 123 | default: |
| goodcjw | 0:71adeb0ac6a2 | 124 | state = s_0; |
| goodcjw | 0:71adeb0ac6a2 | 125 | } |
| goodcjw | 0:71adeb0ac6a2 | 126 | } |
| goodcjw | 0:71adeb0ac6a2 | 127 | |
| goodcjw | 0:71adeb0ac6a2 | 128 | void entry_HI() { |
| goodcjw | 0:71adeb0ac6a2 | 129 | tr_len = 0; |
| goodcjw | 0:71adeb0ac6a2 | 130 | pc.printf("Please input the trigger string in the format of Sbbb...bbbE\n\r"); |
| goodcjw | 0:71adeb0ac6a2 | 131 | if (pc.getc() == 'S') { |
| goodcjw | 0:71adeb0ac6a2 | 132 | emitEvent(e_ValidInput); |
| goodcjw | 0:71adeb0ac6a2 | 133 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 134 | emitEvent(e_InvalidInput); |
| goodcjw | 0:71adeb0ac6a2 | 135 | } |
| goodcjw | 0:71adeb0ac6a2 | 136 | } |
| goodcjw | 0:71adeb0ac6a2 | 137 | |
| goodcjw | 0:71adeb0ac6a2 | 138 | void entry_WD() { |
| goodcjw | 0:71adeb0ac6a2 | 139 | switch (pc.getc()) { |
| goodcjw | 0:71adeb0ac6a2 | 140 | case '0': |
| goodcjw | 0:71adeb0ac6a2 | 141 | trigger[tr_len++] = '0'; |
| goodcjw | 0:71adeb0ac6a2 | 142 | pc.putc('0'); |
| goodcjw | 0:71adeb0ac6a2 | 143 | emitEvent(e_0); |
| goodcjw | 0:71adeb0ac6a2 | 144 | break; |
| goodcjw | 0:71adeb0ac6a2 | 145 | case '1': |
| goodcjw | 0:71adeb0ac6a2 | 146 | trigger[tr_len++] = '1'; |
| goodcjw | 0:71adeb0ac6a2 | 147 | pc.putc('1'); |
| goodcjw | 0:71adeb0ac6a2 | 148 | emitEvent(e_1); |
| goodcjw | 0:71adeb0ac6a2 | 149 | break; |
| goodcjw | 0:71adeb0ac6a2 | 150 | case 'E': |
| goodcjw | 0:71adeb0ac6a2 | 151 | if (tr_len == 0) { |
| goodcjw | 0:71adeb0ac6a2 | 152 | emitEvent(e_InvalidInput); |
| goodcjw | 0:71adeb0ac6a2 | 153 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 154 | emitEvent(e_E); |
| goodcjw | 0:71adeb0ac6a2 | 155 | pc.putc('\n'); |
| goodcjw | 0:71adeb0ac6a2 | 156 | pc.putc('\r'); |
| goodcjw | 0:71adeb0ac6a2 | 157 | trigger[tr_len] = '\0'; |
| goodcjw | 0:71adeb0ac6a2 | 158 | } |
| goodcjw | 0:71adeb0ac6a2 | 159 | break; |
| goodcjw | 0:71adeb0ac6a2 | 160 | case ' ': |
| goodcjw | 0:71adeb0ac6a2 | 161 | pc.putc(' '); |
| goodcjw | 0:71adeb0ac6a2 | 162 | break; |
| goodcjw | 0:71adeb0ac6a2 | 163 | default: |
| goodcjw | 0:71adeb0ac6a2 | 164 | emitEvent(e_InvalidInput); |
| goodcjw | 0:71adeb0ac6a2 | 165 | } |
| goodcjw | 0:71adeb0ac6a2 | 166 | } |
| goodcjw | 0:71adeb0ac6a2 | 167 | |
| goodcjw | 0:71adeb0ac6a2 | 168 | void entry_HE() { |
| goodcjw | 0:71adeb0ac6a2 | 169 | pc.printf("\n\rHOST ERROR\n\r"); |
| goodcjw | 0:71adeb0ac6a2 | 170 | emitEvent(e_Start); |
| goodcjw | 0:71adeb0ac6a2 | 171 | } |
| goodcjw | 0:71adeb0ac6a2 | 172 | |
| goodcjw | 0:71adeb0ac6a2 | 173 | void entry_WI() { |
| goodcjw | 0:71adeb0ac6a2 | 174 | buff_1 = NBUFF; |
| goodcjw | 0:71adeb0ac6a2 | 175 | buff_2 = NBUFF; |
| goodcjw | 0:71adeb0ac6a2 | 176 | last_1 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 177 | last_2 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 178 | tr_pos = 0; |
| goodcjw | 0:71adeb0ac6a2 | 179 | pc.printf("The trigger string is %s\n\r", trigger); |
| goodcjw | 0:71adeb0ac6a2 | 180 | pc.printf("Please start to touch the button\n\r"); |
| goodcjw | 0:71adeb0ac6a2 | 181 | while (tr_pos < tr_len) { |
| goodcjw | 0:71adeb0ac6a2 | 182 | if (readTouchInput() != trigger[tr_pos]) { |
| goodcjw | 0:71adeb0ac6a2 | 183 | emitEvent(e_InvalidInput); |
| goodcjw | 0:71adeb0ac6a2 | 184 | return; |
| goodcjw | 0:71adeb0ac6a2 | 185 | } |
| goodcjw | 0:71adeb0ac6a2 | 186 | pc.putc(trigger[tr_pos++]); |
| goodcjw | 0:71adeb0ac6a2 | 187 | } |
| goodcjw | 0:71adeb0ac6a2 | 188 | pc.putc('\n'); |
| goodcjw | 0:71adeb0ac6a2 | 189 | pc.putc('\r'); |
| goodcjw | 0:71adeb0ac6a2 | 190 | emitEvent(e_DetectMatch); |
| goodcjw | 0:71adeb0ac6a2 | 191 | } |
| goodcjw | 0:71adeb0ac6a2 | 192 | |
| goodcjw | 0:71adeb0ac6a2 | 193 | char readTouchInput() { |
| goodcjw | 0:71adeb0ac6a2 | 194 | while (1) { |
| goodcjw | 0:71adeb0ac6a2 | 195 | if (touchSense_1()) { |
| goodcjw | 0:71adeb0ac6a2 | 196 | myled_1 = 1; |
| goodcjw | 0:71adeb0ac6a2 | 197 | if (!last_1) { |
| goodcjw | 0:71adeb0ac6a2 | 198 | last_1 = 1; |
| goodcjw | 0:71adeb0ac6a2 | 199 | buff_1 = NBUFF; |
| goodcjw | 0:71adeb0ac6a2 | 200 | } |
| goodcjw | 0:71adeb0ac6a2 | 201 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 202 | if (last_1) { |
| goodcjw | 0:71adeb0ac6a2 | 203 | last_1 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 204 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 205 | if (buff_1 == 0) { |
| goodcjw | 0:71adeb0ac6a2 | 206 | if (myled_1) { |
| goodcjw | 0:71adeb0ac6a2 | 207 | myled_1 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 208 | return '0'; |
| goodcjw | 0:71adeb0ac6a2 | 209 | } |
| goodcjw | 0:71adeb0ac6a2 | 210 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 211 | buff_1--; |
| goodcjw | 0:71adeb0ac6a2 | 212 | } |
| goodcjw | 0:71adeb0ac6a2 | 213 | } |
| goodcjw | 0:71adeb0ac6a2 | 214 | } |
| goodcjw | 0:71adeb0ac6a2 | 215 | if (touchSense_2()) { |
| goodcjw | 0:71adeb0ac6a2 | 216 | myled_2 = 1; |
| goodcjw | 0:71adeb0ac6a2 | 217 | if (!last_2) { |
| goodcjw | 0:71adeb0ac6a2 | 218 | last_2 = 1; |
| goodcjw | 0:71adeb0ac6a2 | 219 | buff_2 = NBUFF; |
| goodcjw | 0:71adeb0ac6a2 | 220 | } |
| goodcjw | 0:71adeb0ac6a2 | 221 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 222 | if (last_2) { |
| goodcjw | 0:71adeb0ac6a2 | 223 | last_2 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 224 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 225 | if (buff_2 == 0) { |
| goodcjw | 0:71adeb0ac6a2 | 226 | if (myled_2) { |
| goodcjw | 0:71adeb0ac6a2 | 227 | myled_2 = 0; |
| goodcjw | 0:71adeb0ac6a2 | 228 | return '1'; |
| goodcjw | 0:71adeb0ac6a2 | 229 | } |
| goodcjw | 0:71adeb0ac6a2 | 230 | } else { |
| goodcjw | 0:71adeb0ac6a2 | 231 | buff_2--; |
| goodcjw | 0:71adeb0ac6a2 | 232 | } |
| goodcjw | 0:71adeb0ac6a2 | 233 | } |
| goodcjw | 0:71adeb0ac6a2 | 234 | } |
| goodcjw | 0:71adeb0ac6a2 | 235 | wait(0.005); |
| goodcjw | 0:71adeb0ac6a2 | 236 | } |
| goodcjw | 0:71adeb0ac6a2 | 237 | } |
| goodcjw | 0:71adeb0ac6a2 | 238 | |
| goodcjw | 0:71adeb0ac6a2 | 239 | void entry_TE() { |
| goodcjw | 0:71adeb0ac6a2 | 240 | pc.printf("\n\rTOUCH ERROR\n\r"); |
| goodcjw | 0:71adeb0ac6a2 | 241 | emitEvent(e_Start); |
| goodcjw | 0:71adeb0ac6a2 | 242 | } |
| goodcjw | 0:71adeb0ac6a2 | 243 | |
| goodcjw | 0:71adeb0ac6a2 | 244 | void entry_M() { |
| goodcjw | 0:71adeb0ac6a2 | 245 | pc.printf("MATCH\n\r"); |
| goodcjw | 0:71adeb0ac6a2 | 246 | emitEvent(e_Start); |
| goodcjw | 0:71adeb0ac6a2 | 247 | } |