Éric Bisson / Mbed 2 deprecated S5info_APP4

app4

Dependencies:   mbed-rtos mbed CRC16

Fork of S5info_APP2 by Éric Bisson

main.cpp@25:d0c348c3c85d, 2017-03-07 (annotated)

Committer:
ericbisson
Date:
Tue Mar 07 17:25:16 2017 +0000
Revision:
25:d0c348c3c85d
Parent:
24:2034362db66f
Child:
26:6ffbf3161f6f
pour remise

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ericbisson 15:7c2e70c36b98 1 #include "CRC16.h"
ericbisson 7:5501dbea5650 2 #include "mbed.h"
ericbisson 0:c637467eeb8f 3 #include "rtos.h"
ericbisson 25:d0c348c3c85d 4
ericbisson 8:5b87b1f9d91f 5 Thread ThreadLecture;
ericbisson 24:2034362db66f 6 Thread ThreadWrite;
ericbisson 15:7c2e70c36b98 7 const int PREAMBULE = 0b01010101;
ericbisson 15:7c2e70c36b98 8 const int START = 0b01111110;
ericbisson 15:7c2e70c36b98 9 const int END = 0b01111110;
ericbisson 14:bd909277eb13 10 Serial pc(USBTX, USBRX);
ericbisson 24:2034362db66f 11 DigitalOut out(p13);
ericbisson 24:2034362db66f 12 DigitalOut myled1(LED1);
ericbisson 24:2034362db66f 13 DigitalOut myled2(LED2);
ericbisson 25:d0c348c3c85d 14 InterruptIn interrupt_p30(p30);
ericbisson 25:d0c348c3c85d 15 CRC16 myCRC;
ericbisson 25:d0c348c3c85d 16 Timer t;
ericbisson 25:d0c348c3c85d 17 int periode = 0;
ericbisson 25:d0c348c3c85d 18 char sync = 0;
ericbisson 2:c6465d4e82d2 19
JoeyDionne 12:a55f77a0e188 20 bool transmit = false; //faux pour le debut de demi-periode d'envoie d'un bit, vrai pour la 2ème demi-periode
JoeyDionne 12:a55f77a0e188 21 char trame_sent[80]; //tableau de la trame à envoyer
JoeyDionne 12:a55f77a0e188 22 uint8_t byte_sent_pos, //position de l'octet dans le tableau d'envoi
JoeyDionne 12:a55f77a0e188 23 trame_length; //longueur de la trame complete
ericbisson 20:ac8682cf923b 24
JoeyDionne 23:9c4e4898b741 25 signed char bit_sent; //position du bit de l'octet en cours d'envoi (du MSB au LSB) 7..0
JoeyDionne 23:9c4e4898b741 26 bool bTimer1 = false;
JoeyDionne 11:b27d1a83f688 27
JoeyDionne 23:9c4e4898b741 28 //encodage manchester
JoeyDionne 23:9c4e4898b741 29 bool codeManchester(bool bit, bool clock)
JoeyDionne 23:9c4e4898b741 30 {
JoeyDionne 23:9c4e4898b741 31 return (bit == clock);
JoeyDionne 23:9c4e4898b741 32 }
JoeyDionne 23:9c4e4898b741 33
JoeyDionne 23:9c4e4898b741 34 //Envoie de données bit par bit
JoeyDionne 23:9c4e4898b741 35 void send_data()
ericbisson 25:d0c348c3c85d 36 {
JoeyDionne 23:9c4e4898b741 37 out = codeManchester(((trame_sent[byte_sent_pos] >> bit_sent) & 0x01), bTimer1);
JoeyDionne 23:9c4e4898b741 38 if(bTimer1)
JoeyDionne 23:9c4e4898b741 39 {
JoeyDionne 23:9c4e4898b741 40 bit_sent--;
JoeyDionne 23:9c4e4898b741 41 }
JoeyDionne 23:9c4e4898b741 42 bTimer1 = !bTimer1; //varier entre la 1ere et 2eme partie de demi-periode
JoeyDionne 23:9c4e4898b741 43 if (bit_sent < 0) //Si l'octet a ete envoye
JoeyDionne 23:9c4e4898b741 44 {
JoeyDionne 23:9c4e4898b741 45 bit_sent = 7; //remettre la position initiale pour le prochain octet
JoeyDionne 23:9c4e4898b741 46 byte_sent_pos++; //incrementer l'octet
JoeyDionne 23:9c4e4898b741 47 if (byte_sent_pos >= trame_length) //Si la trame a ete envoyee
JoeyDionne 23:9c4e4898b741 48 {
JoeyDionne 23:9c4e4898b741 49 byte_sent_pos = 0;
JoeyDionne 23:9c4e4898b741 50 bTimer1 = false;
JoeyDionne 23:9c4e4898b741 51 LPC_TIM1->TCR = 0; // disable Timer
JoeyDionne 23:9c4e4898b741 52 }
JoeyDionne 23:9c4e4898b741 53 }
JoeyDionne 23:9c4e4898b741 54 }
JoeyDionne 23:9c4e4898b741 55
ericbisson 25:d0c348c3c85d 56 char messageBuffer[80];
ericbisson 25:d0c348c3c85d 57 char messageLength = 0;
ericbisson 25:d0c348c3c85d 58 char lastpos = 0;
ericbisson 25:d0c348c3c85d 59 void show_message()
ericbisson 25:d0c348c3c85d 60 {
ericbisson 25:d0c348c3c85d 61 while (true)
ericbisson 25:d0c348c3c85d 62 {
ericbisson 25:d0c348c3c85d 63 ThreadLecture.signal_wait(1);
ericbisson 25:d0c348c3c85d 64 for (int i = lastpos; i < messageLength; i++)
ericbisson 25:d0c348c3c85d 65 {
ericbisson 25:d0c348c3c85d 66 pc.printf("%x",messageBuffer[i]);
ericbisson 25:d0c348c3c85d 67
ericbisson 25:d0c348c3c85d 68 if ((i % 11) == 0 && i > 0)
ericbisson 25:d0c348c3c85d 69 {
ericbisson 25:d0c348c3c85d 70 pc.printf("\n");
ericbisson 25:d0c348c3c85d 71 }
ericbisson 25:d0c348c3c85d 72 }
ericbisson 25:d0c348c3c85d 73 lastpos = messageLength;
ericbisson 25:d0c348c3c85d 74 }
ericbisson 25:d0c348c3c85d 75 }
ericbisson 25:d0c348c3c85d 76
ericbisson 25:d0c348c3c85d 77 char byte = 0;
ericbisson 25:d0c348c3c85d 78 char shift = 0;
ericbisson 25:d0c348c3c85d 79 char totalsize = 7;
ericbisson 25:d0c348c3c85d 80 void resetMessage()
ericbisson 25:d0c348c3c85d 81 {
ericbisson 25:d0c348c3c85d 82 byte = 0;
ericbisson 25:d0c348c3c85d 83 shift = 0;
ericbisson 25:d0c348c3c85d 84 totalsize = 7;
ericbisson 25:d0c348c3c85d 85 messageLength = 0;
ericbisson 25:d0c348c3c85d 86 lastpos = 0;
ericbisson 25:d0c348c3c85d 87 }
ericbisson 25:d0c348c3c85d 88
ericbisson 25:d0c348c3c85d 89 void read(bool bit)
ericbisson 25:d0c348c3c85d 90 {
ericbisson 25:d0c348c3c85d 91 int time = t.read_us();
ericbisson 25:d0c348c3c85d 92 if (sync == 1)
ericbisson 25:d0c348c3c85d 93 {
ericbisson 25:d0c348c3c85d 94 periode = time;
ericbisson 25:d0c348c3c85d 95 }
ericbisson 25:d0c348c3c85d 96 sync++;
ericbisson 25:d0c348c3c85d 97
ericbisson 25:d0c348c3c85d 98 if (sync > 1 && (time*1.5 >= periode))
ericbisson 25:d0c348c3c85d 99 {
ericbisson 25:d0c348c3c85d 100 messageBuffer[messageLength] = (messageBuffer[messageLength] << 1) + bit;
ericbisson 25:d0c348c3c85d 101 }
ericbisson 25:d0c348c3c85d 102
ericbisson 25:d0c348c3c85d 103 shift++;
ericbisson 25:d0c348c3c85d 104 if (shift == 8)
ericbisson 25:d0c348c3c85d 105 {
ericbisson 25:d0c348c3c85d 106 shift = 0;
ericbisson 25:d0c348c3c85d 107
ericbisson 25:d0c348c3c85d 108 messageLength++;
ericbisson 25:d0c348c3c85d 109
ericbisson 25:d0c348c3c85d 110 // debug
ericbisson 25:d0c348c3c85d 111 ThreadLecture.signal_set(1);
ericbisson 25:d0c348c3c85d 112
ericbisson 25:d0c348c3c85d 113 // Validations de base
ericbisson 25:d0c348c3c85d 114 if (messageLength == 2 && messageBuffer[1] != START)
ericbisson 25:d0c348c3c85d 115 {
ericbisson 25:d0c348c3c85d 116 resetMessage();
ericbisson 25:d0c348c3c85d 117 }
ericbisson 25:d0c348c3c85d 118
ericbisson 25:d0c348c3c85d 119 if (messageLength == 4)
ericbisson 25:d0c348c3c85d 120 {
ericbisson 25:d0c348c3c85d 121 totalsize = 7 + messageBuffer[3];
ericbisson 25:d0c348c3c85d 122 }
ericbisson 25:d0c348c3c85d 123
ericbisson 25:d0c348c3c85d 124 // fin
ericbisson 25:d0c348c3c85d 125 if (totalsize == messageLength)
ericbisson 25:d0c348c3c85d 126 {
ericbisson 25:d0c348c3c85d 127 // Calcul du CRC
ericbisson 25:d0c348c3c85d 128 unsigned short currentCRC = messageBuffer[totalsize-2] + messageBuffer[totalsize-3]<<8;
ericbisson 25:d0c348c3c85d 129
ericbisson 25:d0c348c3c85d 130 if (currentCRC == myCRC.calculateCRC16(messageBuffer+4, totalsize-7) && messageBuffer[totalsize-1] == END)
ericbisson 25:d0c348c3c85d 131 {
ericbisson 25:d0c348c3c85d 132 // Affiche à l'écran le message valide
ericbisson 25:d0c348c3c85d 133 ThreadLecture.signal_set(1);
ericbisson 25:d0c348c3c85d 134 }
ericbisson 25:d0c348c3c85d 135 resetMessage();
ericbisson 25:d0c348c3c85d 136 }
ericbisson 25:d0c348c3c85d 137 }
ericbisson 25:d0c348c3c85d 138
ericbisson 25:d0c348c3c85d 139 // reset le timer pour mesurer la période
ericbisson 25:d0c348c3c85d 140 t.reset();
ericbisson 25:d0c348c3c85d 141 }
ericbisson 25:d0c348c3c85d 142
ericbisson 25:d0c348c3c85d 143 void rise()
ericbisson 25:d0c348c3c85d 144 {
ericbisson 25:d0c348c3c85d 145 read(0);
ericbisson 25:d0c348c3c85d 146 }
ericbisson 25:d0c348c3c85d 147
ericbisson 25:d0c348c3c85d 148 void fall()
ericbisson 25:d0c348c3c85d 149 {
ericbisson 25:d0c348c3c85d 150 read(1);
ericbisson 25:d0c348c3c85d 151 }
ericbisson 25:d0c348c3c85d 152
ericbisson 14:bd909277eb13 153 extern "C" void TIMER1_IRQHandler()
ericbisson 14:bd909277eb13 154 {
ericbisson 24:2034362db66f 155 LPC_TIM1->TC = 0;
ericbisson 24:2034362db66f 156
ericbisson 24:2034362db66f 157 myled1 = !myled1;
ericbisson 14:bd909277eb13 158 if ((LPC_TIM1->IR & 0x01) == 0x01)
ericbisson 14:bd909277eb13 159 {
JoeyDionne 22:7244c3391bac 160 send_data();
ericbisson 14:bd909277eb13 161 LPC_TIM1->IR |= 1 << 0; // clear
ericbisson 14:bd909277eb13 162 }
ericbisson 1:b3ae0d9f02ad 163 }
ericbisson 1:b3ae0d9f02ad 164
JoeyDionne 13:a436ba0b78e8 165 //création de la trame
ericbisson 20:ac8682cf923b 166 void create_trame(char message[],unsigned char taille)
JoeyDionne 12:a55f77a0e188 167 {
ericbisson 20:ac8682cf923b 168 unsigned short resultCRC = myCRC.calculateCRC16(message,taille);
JoeyDionne 12:a55f77a0e188 169
ericbisson 20:ac8682cf923b 170 trame_sent[0] = PREAMBULE; //Preambule
ericbisson 20:ac8682cf923b 171 trame_sent[1] = START; //Start
JoeyDionne 12:a55f77a0e188 172 trame_sent[2] = 0x00; //Type + Flag mis a 0x00
ericbisson 20:ac8682cf923b 173 trame_sent[3] = taille; //Longueur du message (Max 33 caractères)
JoeyDionne 12:a55f77a0e188 174
JoeyDionne 13:a436ba0b78e8 175 //message
ericbisson 20:ac8682cf923b 176 for (char i=0;i<taille;i++)
JoeyDionne 13:a436ba0b78e8 177 {
JoeyDionne 13:a436ba0b78e8 178 trame_sent[taille + 4] = message[i];
JoeyDionne 13:a436ba0b78e8 179 }
JoeyDionne 13:a436ba0b78e8 180
JoeyDionne 13:a436ba0b78e8 181 //CRC16
JoeyDionne 13:a436ba0b78e8 182 trame_sent[taille + 4] = (resultCRC >> 8) & 0xFF;
JoeyDionne 13:a436ba0b78e8 183 trame_sent[taille + 5] = resultCRC & 0xFF;
JoeyDionne 13:a436ba0b78e8 184
ericbisson 20:ac8682cf923b 185 trame_sent[taille + 6] = END; //End
JoeyDionne 13:a436ba0b78e8 186 trame_length = taille + 7; //Longueur de la trame
JoeyDionne 13:a436ba0b78e8 187 }
JoeyDionne 13:a436ba0b78e8 188
JoeyDionne 13:a436ba0b78e8 189 //obtention du texte
JoeyDionne 13:a436ba0b78e8 190 void get_text()
JoeyDionne 13:a436ba0b78e8 191 {
ericbisson 24:2034362db66f 192 while (true)
ericbisson 24:2034362db66f 193 {
ericbisson 24:2034362db66f 194 char text[4] = {'a','l','l','o'};
ericbisson 24:2034362db66f 195 unsigned char count = 4;
ericbisson 24:2034362db66f 196
ericbisson 24:2034362db66f 197 create_trame(text,count);
ericbisson 24:2034362db66f 198 byte_sent_pos = 0;
ericbisson 24:2034362db66f 199 bit_sent = 7;
ericbisson 24:2034362db66f 200 bTimer1 = false;
ericbisson 24:2034362db66f 201 LPC_TIM1->TCR = 1; // enable and reset Timer
ericbisson 24:2034362db66f 202
ericbisson 25:d0c348c3c85d 203 wait_ms(5000);
ericbisson 24:2034362db66f 204 }
ericbisson 24:2034362db66f 205 /*pc.printf("\n\rYour text : ");
ericbisson 20:ac8682cf923b 206 unsigned char count = 0;
JoeyDionne 12:a55f77a0e188 207 char c = 0x00;
JoeyDionne 12:a55f77a0e188 208 char text[73];
ericbisson 20:ac8682cf923b 209 while(c != '\r' && count < 73) {
JoeyDionne 12:a55f77a0e188 210 c = pc.getc();
JoeyDionne 12:a55f77a0e188 211 text[count] = c;
JoeyDionne 12:a55f77a0e188 212 pc.putc(c);
JoeyDionne 12:a55f77a0e188 213 count++;
JoeyDionne 12:a55f77a0e188 214 }
ericbisson 24:2034362db66f 215 pc.printf("get_text();\n");*/
JoeyDionne 12:a55f77a0e188 216 }
JoeyDionne 12:a55f77a0e188 217
ericbisson 24:2034362db66f 218 void initTimers()
ericbisson 24:2034362db66f 219 {
ericbisson 24:2034362db66f 220 //Timer 1 (match)
ericbisson 24:2034362db66f 221 LPC_SC->PCLKSEL0 |= (1 << 4); // pclk = cclk timer1
ericbisson 24:2034362db66f 222 LPC_SC->PCONP |= (1 << 2); // timer1 power on
ericbisson 24:2034362db66f 223 LPC_TIM1->MCR = 3; // interrupt and reset control
ericbisson 24:2034362db66f 224 LPC_TIM1->TC = 0; // clear timer counter
ericbisson 24:2034362db66f 225 LPC_TIM1->PC = 0; // clear prescale counter
ericbisson 24:2034362db66f 226 LPC_TIM1->PR = 0; // clear prescale register
ericbisson 25:d0c348c3c85d 227 LPC_TIM1->MR0 = (960000); // 10 ms
ericbisson 24:2034362db66f 228 LPC_TIM1->EMR = (3 << 4); // Interrupt & reset timer on match
ericbisson 24:2034362db66f 229 NVIC_EnableIRQ(TIMER1_IRQn); // enable timer interrupt
ericbisson 24:2034362db66f 230 LPC_TIM1->TCR = 0; // disable Timer
ericbisson 24:2034362db66f 231 }
ericbisson 24:2034362db66f 232
ericbisson 2:c6465d4e82d2 233 int main() {
ericbisson 14:bd909277eb13 234 LPC_PINCON->PINSEL0 |= (3 << 8); // pin30
ericbisson 24:2034362db66f 235 LPC_PINCON->PINMODE1 |= 3;
ericbisson 14:bd909277eb13 236 initTimers();
ericbisson 25:d0c348c3c85d 237 ThreadLecture.start(show_message);
ericbisson 24:2034362db66f 238 ThreadWrite.start(get_text);
ericbisson 25:d0c348c3c85d 239 interrupt_p30.fall(fall);
ericbisson 25:d0c348c3c85d 240 interrupt_p30.rise(rise);
ericbisson 25:d0c348c3c85d 241 t.start();
ericbisson 0:c637467eeb8f 242
JoeyDionne 22:7244c3391bac 243 while(true)
JoeyDionne 22:7244c3391bac 244 {
ericbisson 0:c637467eeb8f 245 }
ericbisson 7:5501dbea5650 246 };