Jiwen Cai
/
HW2-2
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main.cpp@0:0036725a5dc3, 2010-11-30 (annotated)
- Committer:
- goodcjw
- Date:
- Tue Nov 30 23:52:45 2010 +0000
- Revision:
- 0:0036725a5dc3
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| goodcjw | 0:0036725a5dc3 | 1 | #include "mbed.h" |
| goodcjw | 0:0036725a5dc3 | 2 | |
| goodcjw | 0:0036725a5dc3 | 3 | const int TRIGGER_LEN = 128; |
| goodcjw | 0:0036725a5dc3 | 4 | const int NBUFF = 10; |
| goodcjw | 0:0036725a5dc3 | 5 | |
| goodcjw | 0:0036725a5dc3 | 6 | typedef enum {s_Init, s_Input} PC_State; |
| goodcjw | 0:0036725a5dc3 | 7 | |
| goodcjw | 0:0036725a5dc3 | 8 | DigitalOut myled_1(LED1); |
| goodcjw | 0:0036725a5dc3 | 9 | DigitalOut myled_2(LED2); |
| goodcjw | 0:0036725a5dc3 | 10 | AnalogIn input_1(p17); |
| goodcjw | 0:0036725a5dc3 | 11 | AnalogIn input_2(p20); |
| goodcjw | 0:0036725a5dc3 | 12 | DigitalIn charger_1(p16); |
| goodcjw | 0:0036725a5dc3 | 13 | DigitalIn charger_2(p19); |
| goodcjw | 0:0036725a5dc3 | 14 | DigitalOut ground_1(p15); |
| goodcjw | 0:0036725a5dc3 | 15 | DigitalOut ground_2(p18); |
| goodcjw | 0:0036725a5dc3 | 16 | Serial pc(USBTX, USBRX); // tx, rx |
| goodcjw | 0:0036725a5dc3 | 17 | |
| goodcjw | 0:0036725a5dc3 | 18 | int buff_1, buff_2; |
| goodcjw | 0:0036725a5dc3 | 19 | int last_1, last_2; |
| goodcjw | 0:0036725a5dc3 | 20 | char key; |
| goodcjw | 0:0036725a5dc3 | 21 | |
| goodcjw | 0:0036725a5dc3 | 22 | // PC_State pc_State = s_Init; |
| goodcjw | 0:0036725a5dc3 | 23 | char tmptr[TRIGGER_LEN]; |
| goodcjw | 0:0036725a5dc3 | 24 | char trigger[TRIGGER_LEN]; |
| goodcjw | 0:0036725a5dc3 | 25 | char detectW[TRIGGER_LEN]; |
| goodcjw | 0:0036725a5dc3 | 26 | size_t tmp_len, tr_len; |
| goodcjw | 0:0036725a5dc3 | 27 | size_t window_sz, match_len; |
| goodcjw | 0:0036725a5dc3 | 28 | |
| goodcjw | 0:0036725a5dc3 | 29 | bool pcinput; // then true, PC is reading input from the host. Otherwise, wait user press the 'S' button. |
| goodcjw | 0:0036725a5dc3 | 30 | void getSerialInput(); |
| goodcjw | 0:0036725a5dc3 | 31 | int touchSense_1(void); |
| goodcjw | 0:0036725a5dc3 | 32 | int touchSense_2(void); |
| goodcjw | 0:0036725a5dc3 | 33 | int buttonTouched(); |
| goodcjw | 0:0036725a5dc3 | 34 | char readTouchInput(); |
| goodcjw | 0:0036725a5dc3 | 35 | int isIdentity(char* cp1, char* cp2, size_t len); |
| goodcjw | 0:0036725a5dc3 | 36 | void windowShift(char* wpt, size_t len); |
| goodcjw | 0:0036725a5dc3 | 37 | void printDetectWindow(char* wpt, size_t len); |
| goodcjw | 0:0036725a5dc3 | 38 | |
| goodcjw | 0:0036725a5dc3 | 39 | int main() { |
| goodcjw | 0:0036725a5dc3 | 40 | tmp_len = 0; |
| goodcjw | 0:0036725a5dc3 | 41 | tr_len = 0; |
| goodcjw | 0:0036725a5dc3 | 42 | pcinput = 0; |
| goodcjw | 0:0036725a5dc3 | 43 | match_len = 0; |
| goodcjw | 0:0036725a5dc3 | 44 | window_sz = 0; |
| goodcjw | 0:0036725a5dc3 | 45 | memset(tmptr, 0, TRIGGER_LEN); |
| goodcjw | 0:0036725a5dc3 | 46 | memset(trigger, 0, TRIGGER_LEN); |
| goodcjw | 0:0036725a5dc3 | 47 | memset(detectW, 0, TRIGGER_LEN); |
| goodcjw | 0:0036725a5dc3 | 48 | pc.attach(&getSerialInput); |
| goodcjw | 0:0036725a5dc3 | 49 | pc.printf("Please input the trigger string in the format of Sbbb...bbbE\n\r"); |
| goodcjw | 0:0036725a5dc3 | 50 | while(buttonTouched()) { |
| goodcjw | 0:0036725a5dc3 | 51 | if (tr_len) { |
| goodcjw | 0:0036725a5dc3 | 52 | if (window_sz == tr_len) { |
| goodcjw | 0:0036725a5dc3 | 53 | windowShift(detectW, tr_len); |
| goodcjw | 0:0036725a5dc3 | 54 | detectW[tr_len - 1] = key; |
| goodcjw | 0:0036725a5dc3 | 55 | printDetectWindow(detectW, window_sz); |
| goodcjw | 0:0036725a5dc3 | 56 | if (isIdentity(detectW, trigger, tr_len)) { |
| goodcjw | 0:0036725a5dc3 | 57 | pc.printf("MATCH\n\r"); |
| goodcjw | 0:0036725a5dc3 | 58 | } |
| goodcjw | 0:0036725a5dc3 | 59 | } else { |
| goodcjw | 0:0036725a5dc3 | 60 | detectW[window_sz++] = key; |
| goodcjw | 0:0036725a5dc3 | 61 | printDetectWindow(detectW, window_sz); |
| goodcjw | 0:0036725a5dc3 | 62 | if (window_sz == tr_len) { |
| goodcjw | 0:0036725a5dc3 | 63 | if (isIdentity(detectW, trigger, tr_len)) { |
| goodcjw | 0:0036725a5dc3 | 64 | pc.printf("MATCH\n\r"); |
| goodcjw | 0:0036725a5dc3 | 65 | } |
| goodcjw | 0:0036725a5dc3 | 66 | } |
| goodcjw | 0:0036725a5dc3 | 67 | } |
| goodcjw | 0:0036725a5dc3 | 68 | } |
| goodcjw | 0:0036725a5dc3 | 69 | } |
| goodcjw | 0:0036725a5dc3 | 70 | } |
| goodcjw | 0:0036725a5dc3 | 71 | |
| goodcjw | 0:0036725a5dc3 | 72 | void getSerialInput() { |
| goodcjw | 0:0036725a5dc3 | 73 | char tmp_char = pc.getc(); |
| goodcjw | 0:0036725a5dc3 | 74 | if (tmp_char == 'S') { |
| goodcjw | 0:0036725a5dc3 | 75 | tmp_len = 0; |
| goodcjw | 0:0036725a5dc3 | 76 | tr_len = 0; // If user starts to input a new trigger string |
| goodcjw | 0:0036725a5dc3 | 77 | // automatically disable the old one. At this period, |
| goodcjw | 0:0036725a5dc3 | 78 | // no touch input would be reponsed. |
| goodcjw | 0:0036725a5dc3 | 79 | window_sz = 0; |
| goodcjw | 0:0036725a5dc3 | 80 | memset(tmptr, 0, TRIGGER_LEN); |
| goodcjw | 0:0036725a5dc3 | 81 | pcinput = 1; |
| goodcjw | 0:0036725a5dc3 | 82 | pc.putc(tmp_char); |
| goodcjw | 0:0036725a5dc3 | 83 | } else if (tmp_char == '0' || tmp_char == '1') { |
| goodcjw | 0:0036725a5dc3 | 84 | if (pcinput && tmp_len != TRIGGER_LEN - 1) { |
| goodcjw | 0:0036725a5dc3 | 85 | tmptr[tmp_len++] = tmp_char; |
| goodcjw | 0:0036725a5dc3 | 86 | pc.putc(tmp_char); |
| goodcjw | 0:0036725a5dc3 | 87 | } else { |
| goodcjw | 0:0036725a5dc3 | 88 | // It is not time for input now. |
| goodcjw | 0:0036725a5dc3 | 89 | pc.printf("HOST ERROR\n\r"); |
| goodcjw | 0:0036725a5dc3 | 90 | } |
| goodcjw | 0:0036725a5dc3 | 91 | } else if (tmp_char == 'E') { |
| goodcjw | 0:0036725a5dc3 | 92 | if (tmp_len == 0) { |
| goodcjw | 0:0036725a5dc3 | 93 | pc.printf("HOST ERROR\n\r"); |
| goodcjw | 0:0036725a5dc3 | 94 | } else { |
| goodcjw | 0:0036725a5dc3 | 95 | pcinput = 0; |
| goodcjw | 0:0036725a5dc3 | 96 | match_len = 0; |
| goodcjw | 0:0036725a5dc3 | 97 | tmptr[tmp_len] = '\0'; |
| goodcjw | 0:0036725a5dc3 | 98 | memcpy(trigger, tmptr, TRIGGER_LEN); |
| goodcjw | 0:0036725a5dc3 | 99 | tr_len = tmp_len; |
| goodcjw | 0:0036725a5dc3 | 100 | pc.putc(tmp_char); |
| goodcjw | 0:0036725a5dc3 | 101 | pc.printf("\n\rThe trigger string is %s\n\r", trigger); |
| goodcjw | 0:0036725a5dc3 | 102 | pc.printf("Please start to touch the button\n\r"); |
| goodcjw | 0:0036725a5dc3 | 103 | pc.printf("Or you can the trigger string in the format of Sbbb...bbbE\n\r"); |
| goodcjw | 0:0036725a5dc3 | 104 | } |
| goodcjw | 0:0036725a5dc3 | 105 | } else if (tmp_char == ' ') { |
| goodcjw | 0:0036725a5dc3 | 106 | // Simply ignore the whitespace |
| goodcjw | 0:0036725a5dc3 | 107 | } else { |
| goodcjw | 0:0036725a5dc3 | 108 | // Invalid input |
| goodcjw | 0:0036725a5dc3 | 109 | if (pcinput) { |
| goodcjw | 0:0036725a5dc3 | 110 | pc.printf("\n\rHOST ERROR\n\rS"); |
| goodcjw | 0:0036725a5dc3 | 111 | for (int i = 0; i < tmp_len; i++) { |
| goodcjw | 0:0036725a5dc3 | 112 | pc.putc(tmptr[i]); |
| goodcjw | 0:0036725a5dc3 | 113 | } |
| goodcjw | 0:0036725a5dc3 | 114 | } else { |
| goodcjw | 0:0036725a5dc3 | 115 | pc.printf("HOST ERROR\n\r"); |
| goodcjw | 0:0036725a5dc3 | 116 | } |
| goodcjw | 0:0036725a5dc3 | 117 | } |
| goodcjw | 0:0036725a5dc3 | 118 | } |
| goodcjw | 0:0036725a5dc3 | 119 | |
| goodcjw | 0:0036725a5dc3 | 120 | |
| goodcjw | 0:0036725a5dc3 | 121 | int buttonTouched() { |
| goodcjw | 0:0036725a5dc3 | 122 | key = readTouchInput(); |
| goodcjw | 0:0036725a5dc3 | 123 | return 1; |
| goodcjw | 0:0036725a5dc3 | 124 | } |
| goodcjw | 0:0036725a5dc3 | 125 | |
| goodcjw | 0:0036725a5dc3 | 126 | int touchSense_1(void) { |
| goodcjw | 0:0036725a5dc3 | 127 | float sample; |
| goodcjw | 0:0036725a5dc3 | 128 | ground_1 = 0; |
| goodcjw | 0:0036725a5dc3 | 129 | charger_1.mode(PullUp); |
| goodcjw | 0:0036725a5dc3 | 130 | charger_1.mode(PullNone); |
| goodcjw | 0:0036725a5dc3 | 131 | sample=input_1.read(); |
| goodcjw | 0:0036725a5dc3 | 132 | if (sample < 0.3) { |
| goodcjw | 0:0036725a5dc3 | 133 | return 1; |
| goodcjw | 0:0036725a5dc3 | 134 | } else { |
| goodcjw | 0:0036725a5dc3 | 135 | return 0; |
| goodcjw | 0:0036725a5dc3 | 136 | } |
| goodcjw | 0:0036725a5dc3 | 137 | } |
| goodcjw | 0:0036725a5dc3 | 138 | |
| goodcjw | 0:0036725a5dc3 | 139 | int touchSense_2(void) { |
| goodcjw | 0:0036725a5dc3 | 140 | float sample; |
| goodcjw | 0:0036725a5dc3 | 141 | ground_2 = 0; |
| goodcjw | 0:0036725a5dc3 | 142 | charger_2.mode(PullUp); |
| goodcjw | 0:0036725a5dc3 | 143 | charger_2.mode(PullNone); |
| goodcjw | 0:0036725a5dc3 | 144 | sample=input_2.read(); |
| goodcjw | 0:0036725a5dc3 | 145 | if (sample < 0.3) { |
| goodcjw | 0:0036725a5dc3 | 146 | return 1; |
| goodcjw | 0:0036725a5dc3 | 147 | } else { |
| goodcjw | 0:0036725a5dc3 | 148 | return 0; |
| goodcjw | 0:0036725a5dc3 | 149 | } |
| goodcjw | 0:0036725a5dc3 | 150 | } |
| goodcjw | 0:0036725a5dc3 | 151 | |
| goodcjw | 0:0036725a5dc3 | 152 | /* |
| goodcjw | 0:0036725a5dc3 | 153 | * In this implementation, "multicouch" is naturely not supported. |
| goodcjw | 0:0036725a5dc3 | 154 | * When two button is touch at the same time, '0' will be always returned |
| goodcjw | 0:0036725a5dc3 | 155 | * instead of '1'. |
| goodcjw | 0:0036725a5dc3 | 156 | */ |
| goodcjw | 0:0036725a5dc3 | 157 | char readTouchInput() { |
| goodcjw | 0:0036725a5dc3 | 158 | while (1) { |
| goodcjw | 0:0036725a5dc3 | 159 | if (touchSense_1()) { |
| goodcjw | 0:0036725a5dc3 | 160 | myled_1 = 1; |
| goodcjw | 0:0036725a5dc3 | 161 | if (!last_1) { |
| goodcjw | 0:0036725a5dc3 | 162 | last_1 = 1; |
| goodcjw | 0:0036725a5dc3 | 163 | buff_1 = NBUFF; |
| goodcjw | 0:0036725a5dc3 | 164 | } |
| goodcjw | 0:0036725a5dc3 | 165 | } else { |
| goodcjw | 0:0036725a5dc3 | 166 | if (last_1) { |
| goodcjw | 0:0036725a5dc3 | 167 | last_1 = 0; |
| goodcjw | 0:0036725a5dc3 | 168 | } else { |
| goodcjw | 0:0036725a5dc3 | 169 | if (buff_1 == 0) { |
| goodcjw | 0:0036725a5dc3 | 170 | if (myled_1) { |
| goodcjw | 0:0036725a5dc3 | 171 | myled_1 = 0; |
| goodcjw | 0:0036725a5dc3 | 172 | return '0'; |
| goodcjw | 0:0036725a5dc3 | 173 | } |
| goodcjw | 0:0036725a5dc3 | 174 | } else { |
| goodcjw | 0:0036725a5dc3 | 175 | buff_1--; |
| goodcjw | 0:0036725a5dc3 | 176 | } |
| goodcjw | 0:0036725a5dc3 | 177 | } |
| goodcjw | 0:0036725a5dc3 | 178 | } |
| goodcjw | 0:0036725a5dc3 | 179 | if (touchSense_2()) { |
| goodcjw | 0:0036725a5dc3 | 180 | myled_2 = 1; |
| goodcjw | 0:0036725a5dc3 | 181 | if (!last_2) { |
| goodcjw | 0:0036725a5dc3 | 182 | last_2 = 1; |
| goodcjw | 0:0036725a5dc3 | 183 | buff_2 = NBUFF; |
| goodcjw | 0:0036725a5dc3 | 184 | } |
| goodcjw | 0:0036725a5dc3 | 185 | } else { |
| goodcjw | 0:0036725a5dc3 | 186 | if (last_2) { |
| goodcjw | 0:0036725a5dc3 | 187 | last_2 = 0; |
| goodcjw | 0:0036725a5dc3 | 188 | } else { |
| goodcjw | 0:0036725a5dc3 | 189 | if (buff_2 == 0) { |
| goodcjw | 0:0036725a5dc3 | 190 | if (myled_2) { |
| goodcjw | 0:0036725a5dc3 | 191 | myled_2 = 0; |
| goodcjw | 0:0036725a5dc3 | 192 | return '1'; |
| goodcjw | 0:0036725a5dc3 | 193 | } |
| goodcjw | 0:0036725a5dc3 | 194 | } else { |
| goodcjw | 0:0036725a5dc3 | 195 | buff_2--; |
| goodcjw | 0:0036725a5dc3 | 196 | } |
| goodcjw | 0:0036725a5dc3 | 197 | } |
| goodcjw | 0:0036725a5dc3 | 198 | } |
| goodcjw | 0:0036725a5dc3 | 199 | wait(0.005); |
| goodcjw | 0:0036725a5dc3 | 200 | } |
| goodcjw | 0:0036725a5dc3 | 201 | } |
| goodcjw | 0:0036725a5dc3 | 202 | |
| goodcjw | 0:0036725a5dc3 | 203 | int isIdentity(char* cp1, char* cp2, size_t len) { |
| goodcjw | 0:0036725a5dc3 | 204 | for (int i = 0; i != len; i++) { |
| goodcjw | 0:0036725a5dc3 | 205 | if (cp1[i] != cp2[i]) { |
| goodcjw | 0:0036725a5dc3 | 206 | return 0; |
| goodcjw | 0:0036725a5dc3 | 207 | } |
| goodcjw | 0:0036725a5dc3 | 208 | } |
| goodcjw | 0:0036725a5dc3 | 209 | return 1; |
| goodcjw | 0:0036725a5dc3 | 210 | } |
| goodcjw | 0:0036725a5dc3 | 211 | |
| goodcjw | 0:0036725a5dc3 | 212 | void windowShift(char* wpt, size_t len) { |
| goodcjw | 0:0036725a5dc3 | 213 | for (int i = 0; i != len - 1; i++) { |
| goodcjw | 0:0036725a5dc3 | 214 | wpt[i] = wpt[i + 1]; |
| goodcjw | 0:0036725a5dc3 | 215 | } |
| goodcjw | 0:0036725a5dc3 | 216 | } |
| goodcjw | 0:0036725a5dc3 | 217 | |
| goodcjw | 0:0036725a5dc3 | 218 | void printDetectWindow(char* wpt, size_t len) { |
| goodcjw | 0:0036725a5dc3 | 219 | pc.printf("Current detection window: "); |
| goodcjw | 0:0036725a5dc3 | 220 | for (int i = 0; i != len; i++) { |
| goodcjw | 0:0036725a5dc3 | 221 | pc.putc(wpt[i]); |
| goodcjw | 0:0036725a5dc3 | 222 | } |
| goodcjw | 0:0036725a5dc3 | 223 | pc.printf("\n\r"); |
| goodcjw | 0:0036725a5dc3 | 224 | } |