Éric Bisson / Mbed 2 deprecated S5info_APP4

app4

Dependencies:   mbed-rtos mbed CRC16

Fork of S5info_APP2 by Éric Bisson

main.cpp@16:f2661759714c, 2017-03-07 (annotated)

Committer:
ericbisson
Date:
Tue Mar 07 05:11:35 2017 +0000
Revision:
16:f2661759714c
Parent:
15:7c2e70c36b98
Child:
17:2b4b3f3a0489
update read

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 15:7c2e70c36b98 4 #include <vector>
ericbisson 15:7c2e70c36b98 5 using std::vector;
ericbisson 15:7c2e70c36b98 6 DigitalIn in(p30);
ericbisson 8:5b87b1f9d91f 7 Thread ThreadLecture;
ericbisson 15:7c2e70c36b98 8 const int PREAMBULE = 0b01010101;
ericbisson 15:7c2e70c36b98 9 const int START = 0b01111110;
ericbisson 15:7c2e70c36b98 10 const int END = 0b01111110;
ericbisson 14:bd909277eb13 11 Serial pc(USBTX, USBRX);
ericbisson 14:bd909277eb13 12 DigitalOut out(p8);
ericbisson 2:c6465d4e82d2 13
JoeyDionne 12:a55f77a0e188 14 bool transmit = false; //faux pour le debut de demi-periode d'envoie d'un bit, vrai pour la 2ème demi-periode
JoeyDionne 12:a55f77a0e188 15 char trame_sent[80]; //tableau de la trame à envoyer
JoeyDionne 12:a55f77a0e188 16 uint8_t byte_sent_pos, //position de l'octet dans le tableau d'envoi
JoeyDionne 12:a55f77a0e188 17 bit_sent, //position du bit de l'octet en cours d'envoi (du MSB au LSB) 7..0
JoeyDionne 12:a55f77a0e188 18 trame_length; //longueur de la trame complete
JoeyDionne 11:b27d1a83f688 19
ericbisson 14:bd909277eb13 20 void initTimers()
ericbisson 14:bd909277eb13 21 {
ericbisson 14:bd909277eb13 22 //Timer 1 (match)
ericbisson 14:bd909277eb13 23 LPC_SC->PCLKSEL0 |= (1 << 4); // pclk = cclk timer1
ericbisson 14:bd909277eb13 24 LPC_SC->PCONP |= (1 << 2); // timer1 power on
ericbisson 15:7c2e70c36b98 25 LPC_TIM1->MR0 = 960000; // 100 ms
ericbisson 14:bd909277eb13 26 LPC_TIM1->MCR = 3; // interrupt and reset control
ericbisson 14:bd909277eb13 27 LPC_TIM1->EMR = (3 << 4); // Interrupt & reset timer on match
ericbisson 14:bd909277eb13 28 NVIC_EnableIRQ(TIMER1_IRQn); // enable timer interrupt
ericbisson 14:bd909277eb13 29 LPC_TIM1->TCR = 1; // enable Timer
ericbisson 14:bd909277eb13 30
ericbisson 14:bd909277eb13 31 //Timer 2 (cap)
ericbisson 14:bd909277eb13 32 LPC_SC->PCLKSEL1 |= (1 << 12); // pclk = cclk timer2
ericbisson 14:bd909277eb13 33 LPC_SC->PCONP |= (1 << 22); // timer2 power on
ericbisson 14:bd909277eb13 34 LPC_TIM2->TC = 0; // clear timer counter
ericbisson 14:bd909277eb13 35 LPC_TIM2->PC = 0; // clear prescale counter
ericbisson 14:bd909277eb13 36 LPC_TIM2->PR = 0; // clear prescale register
ericbisson 14:bd909277eb13 37 LPC_TIM2->TCR |= (1 << 1); // reset timer
ericbisson 14:bd909277eb13 38 LPC_TIM2->TCR &= ~(1 << 1); // release reset
ericbisson 14:bd909277eb13 39 LPC_TIM2->IR = 0xFFFFFFFF; // clear interrupt register
ericbisson 14:bd909277eb13 40 LPC_TIM2->CCR |= 0x0000007; // enable rising-edge and falling-edge capture
ericbisson 14:bd909277eb13 41 NVIC_EnableIRQ(TIMER2_IRQn); // enable timer interrupt
ericbisson 14:bd909277eb13 42 LPC_TIM2->TCR = 1; // start Timer
ericbisson 14:bd909277eb13 43 }
JoeyDionne 11:b27d1a83f688 44
ericbisson 14:bd909277eb13 45 bool bTimer1 = false;
ericbisson 14:bd909277eb13 46 extern "C" void TIMER1_IRQHandler()
ericbisson 14:bd909277eb13 47 {
ericbisson 14:bd909277eb13 48 if ((LPC_TIM1->IR & 0x01) == 0x01)
ericbisson 14:bd909277eb13 49 {
ericbisson 14:bd909277eb13 50 bTimer1 = !bTimer1;
ericbisson 14:bd909277eb13 51
ericbisson 14:bd909277eb13 52 LPC_TIM1->IR |= 1 << 0; // clear
ericbisson 14:bd909277eb13 53 }
ericbisson 1:b3ae0d9f02ad 54 }
ericbisson 1:b3ae0d9f02ad 55
ericbisson 14:bd909277eb13 56 int sumClocks = 0;
ericbisson 14:bd909277eb13 57 int PeriodLength = 0;
ericbisson 14:bd909277eb13 58 bool bReceivedFirstBit = false;
ericbisson 14:bd909277eb13 59 extern "C" void TIMER2_IRQHandler()
ericbisson 7:5501dbea5650 60 {
ericbisson 14:bd909277eb13 61 if (PeriodLength > 0)
ericbisson 7:5501dbea5650 62 {
ericbisson 15:7c2e70c36b98 63 if (LPC_TIM2->CR0 >= PeriodLength*1.5 || (sumClocks + LPC_TIM2->CR0) >= PeriodLength*1.5)
ericbisson 8:5b87b1f9d91f 64 {
ericbisson 14:bd909277eb13 65 sumClocks = 0;
ericbisson 14:bd909277eb13 66
ericbisson 14:bd909277eb13 67 ThreadLecture.signal_set(1);
ericbisson 14:bd909277eb13 68 }
ericbisson 14:bd909277eb13 69 else
ericbisson 14:bd909277eb13 70 {
ericbisson 14:bd909277eb13 71 sumClocks += LPC_TIM2->CR0;
ericbisson 8:5b87b1f9d91f 72 }
ericbisson 1:b3ae0d9f02ad 73 }
ericbisson 14:bd909277eb13 74 else if (bReceivedFirstBit)
ericbisson 14:bd909277eb13 75 {
ericbisson 14:bd909277eb13 76 PeriodLength = LPC_TIM2->CR0 / 2;
ericbisson 14:bd909277eb13 77 ThreadLecture.signal_set(1);
ericbisson 14:bd909277eb13 78 }
ericbisson 14:bd909277eb13 79 else
ericbisson 14:bd909277eb13 80 {
ericbisson 14:bd909277eb13 81 bReceivedFirstBit = true;
ericbisson 14:bd909277eb13 82 ThreadLecture.signal_set(1);
ericbisson 14:bd909277eb13 83 }
ericbisson 15:7c2e70c36b98 84
ericbisson 14:bd909277eb13 85 LPC_TIM2->TC = 0;
ericbisson 14:bd909277eb13 86 LPC_TIM2->IR |= 0xFFFFFFFF; // clear
ericbisson 14:bd909277eb13 87 }
ericbisson 4:87e9b434bb4d 88
JoeyDionne 13:a436ba0b78e8 89 bool codeManchester(bool bit, bool clock)
JoeyDionne 13:a436ba0b78e8 90 {
JoeyDionne 13:a436ba0b78e8 91 return (bit == clock);
JoeyDionne 13:a436ba0b78e8 92 }
JoeyDionne 13:a436ba0b78e8 93
JoeyDionne 12:a55f77a0e188 94 void send_data()
JoeyDionne 12:a55f77a0e188 95 {
ericbisson 15:7c2e70c36b98 96 out = codeManchester(((trame_sent[byte_sent_pos] >> bit_sent) & 0x01), bTimer1); // Encodage Manchester
ericbisson 15:7c2e70c36b98 97 if(bTimer1)
JoeyDionne 13:a436ba0b78e8 98 {
JoeyDionne 12:a55f77a0e188 99 bit_sent--;
JoeyDionne 12:a55f77a0e188 100 }
ericbisson 15:7c2e70c36b98 101 bTimer1 = !bTimer1; //varier entre la 1ere et 2eme partie de demi-periode
JoeyDionne 12:a55f77a0e188 102 if (bit_sent < 0) { //Si l'octet a ete envoye
JoeyDionne 12:a55f77a0e188 103 bit_sent = 7; //remettre la position initiale pour le prochain octet
JoeyDionne 12:a55f77a0e188 104 byte_sent_pos++; //incrementer l'octet
JoeyDionne 13:a436ba0b78e8 105 if (byte_sent_pos >= trame_length) { //Si la trame a ete envoyee
JoeyDionne 12:a55f77a0e188 106 byte_sent_pos = 0;
ericbisson 15:7c2e70c36b98 107 bTimer1 = false;
JoeyDionne 12:a55f77a0e188 108 }
JoeyDionne 12:a55f77a0e188 109 }
JoeyDionne 12:a55f77a0e188 110 }
JoeyDionne 12:a55f77a0e188 111
JoeyDionne 13:a436ba0b78e8 112 //création de la trame
JoeyDionne 13:a436ba0b78e8 113 void create_trame(char message[],int taille)
JoeyDionne 12:a55f77a0e188 114 {
JoeyDionne 12:a55f77a0e188 115 CRC16 *myCRC = new CRC16();
JoeyDionne 13:a436ba0b78e8 116 unsigned short resultCRC = myCRC->calculateCRC16(message,taille);
JoeyDionne 12:a55f77a0e188 117
JoeyDionne 12:a55f77a0e188 118 trame_sent[0] = 0x55; //Preambule
JoeyDionne 12:a55f77a0e188 119 trame_sent[1] = 0x7E; //Start
JoeyDionne 12:a55f77a0e188 120 trame_sent[2] = 0x00; //Type + Flag mis a 0x00
JoeyDionne 13:a436ba0b78e8 121 trame_sent[3] = (char)taille; //Longueur du message (Max 33 caractères)
JoeyDionne 12:a55f77a0e188 122
JoeyDionne 13:a436ba0b78e8 123 //message
JoeyDionne 13:a436ba0b78e8 124 for (int i=0;i<taille;i++)
JoeyDionne 13:a436ba0b78e8 125 {
JoeyDionne 13:a436ba0b78e8 126 trame_sent[taille + 4] = message[i];
JoeyDionne 13:a436ba0b78e8 127 }
JoeyDionne 13:a436ba0b78e8 128
JoeyDionne 13:a436ba0b78e8 129 //CRC16
JoeyDionne 13:a436ba0b78e8 130 trame_sent[taille + 4] = (resultCRC >> 8) & 0xFF;
JoeyDionne 13:a436ba0b78e8 131 trame_sent[taille + 5] = resultCRC & 0xFF;
JoeyDionne 13:a436ba0b78e8 132
JoeyDionne 13:a436ba0b78e8 133 trame_sent[taille + 6] = 0x7E; //End
JoeyDionne 13:a436ba0b78e8 134 trame_length = taille + 7; //Longueur de la trame
JoeyDionne 13:a436ba0b78e8 135 }
JoeyDionne 13:a436ba0b78e8 136
JoeyDionne 13:a436ba0b78e8 137 //obtention du texte
JoeyDionne 13:a436ba0b78e8 138 void get_text()
JoeyDionne 13:a436ba0b78e8 139 {
JoeyDionne 12:a55f77a0e188 140 pc.printf("\n\rYour text : ");
JoeyDionne 12:a55f77a0e188 141 int count = 0;
JoeyDionne 12:a55f77a0e188 142 char c = 0x00;
JoeyDionne 12:a55f77a0e188 143 char text[73];
JoeyDionne 13:a436ba0b78e8 144 while(c != 0x0D && count < 73) { //Tant que c'est different de '\r' et pour un maximum de 73 caractères
JoeyDionne 12:a55f77a0e188 145 c = pc.getc();
JoeyDionne 12:a55f77a0e188 146 text[count] = c;
JoeyDionne 12:a55f77a0e188 147 pc.putc(c);
JoeyDionne 12:a55f77a0e188 148 count++;
JoeyDionne 12:a55f77a0e188 149 }
JoeyDionne 12:a55f77a0e188 150
JoeyDionne 13:a436ba0b78e8 151 create_trame(text,count);
JoeyDionne 12:a55f77a0e188 152 }
JoeyDionne 12:a55f77a0e188 153
JoeyDionne 12:a55f77a0e188 154 void write()
JoeyDionne 12:a55f77a0e188 155 {
JoeyDionne 12:a55f77a0e188 156 byte_sent_pos = 0;
JoeyDionne 12:a55f77a0e188 157 bit_sent = 7;
ericbisson 15:7c2e70c36b98 158 bTimer1 = false;
JoeyDionne 13:a436ba0b78e8 159 //TODO start interrupt timer 1
JoeyDionne 13:a436ba0b78e8 160 //LPC_RIT->MCR = 1; //Permettre les interruption du MAT
JoeyDionne 13:a436ba0b78e8 161 //LPC_RIT->MR0 = LPC_RIT->TC + HALF_PERIOD; //Faire une interruption a la prochaine demi-periode
JoeyDionne 12:a55f77a0e188 162 }
JoeyDionne 12:a55f77a0e188 163
ericbisson 15:7c2e70c36b98 164 void read()
ericbisson 15:7c2e70c36b98 165 {
ericbisson 16:f2661759714c 166 char byte = 0;
ericbisson 15:7c2e70c36b98 167 vector<char> bytes;
ericbisson 15:7c2e70c36b98 168 char shift = 0;
ericbisson 16:f2661759714c 169 char totalsize = 7;
ericbisson 15:7c2e70c36b98 170 while (true)
ericbisson 15:7c2e70c36b98 171 {
ericbisson 15:7c2e70c36b98 172 ThreadLecture.signal_wait(1);
ericbisson 15:7c2e70c36b98 173
ericbisson 16:f2661759714c 174 byte = (byte << 1) + !in; // inversion car 2e période
ericbisson 15:7c2e70c36b98 175
ericbisson 15:7c2e70c36b98 176 shift++;
ericbisson 15:7c2e70c36b98 177 if (shift == 8)
ericbisson 15:7c2e70c36b98 178 {
ericbisson 16:f2661759714c 179 shift = 0;
ericbisson 16:f2661759714c 180
ericbisson 16:f2661759714c 181 // à partir d'ici, je travaille en byte et non bit
ericbisson 15:7c2e70c36b98 182 bytes.push_back(byte);
ericbisson 16:f2661759714c 183
ericbisson 16:f2661759714c 184 // Validations de base
ericbisson 16:f2661759714c 185 if ((bytes.size() == 1 && bytes[0] != PREAMBULE) ||
ericbisson 16:f2661759714c 186 (bytes.size() == 2 && bytes[1] != START))
ericbisson 16:f2661759714c 187 {
ericbisson 16:f2661759714c 188 bytes.clear();
ericbisson 16:f2661759714c 189 }
ericbisson 16:f2661759714c 190 if (bytes.size() == 3)
ericbisson 16:f2661759714c 191 {
ericbisson 16:f2661759714c 192 totalsize = 7 + bytes[2];
ericbisson 16:f2661759714c 193 }
ericbisson 16:f2661759714c 194
ericbisson 16:f2661759714c 195 // fin
ericbisson 16:f2661759714c 196 if (totalsize == bytes.size())
ericbisson 16:f2661759714c 197 {
ericbisson 16:f2661759714c 198 // Calcul du CRC
ericbisson 16:f2661759714c 199 unsigned short currentCRC = bytes[bytes.size()-2] + bytes[bytes.size()-3]<<8;
ericbisson 16:f2661759714c 200
ericbisson 16:f2661759714c 201 vector<char> charge_utile(&bytes[4], &bytes[bytes.size()-4]);
ericbisson 16:f2661759714c 202
ericbisson 16:f2661759714c 203 if (currentCRC == mycrc16.calculateCRC16(&charge_utile[0], charge_utile.size()) && bytes.back() == END)
ericbisson 16:f2661759714c 204 {
ericbisson 16:f2661759714c 205 // Affiche à l'écran le message valide
ericbisson 16:f2661759714c 206 pc.printf(&charge_utile[0], charge_utile.size());
ericbisson 16:f2661759714c 207 }
ericbisson 16:f2661759714c 208 bytes.clear();
ericbisson 16:f2661759714c 209 }
ericbisson 15:7c2e70c36b98 210 }
ericbisson 15:7c2e70c36b98 211 }
ericbisson 15:7c2e70c36b98 212 }
ericbisson 15:7c2e70c36b98 213
ericbisson 2:c6465d4e82d2 214 int main() {
ericbisson 14:bd909277eb13 215 LPC_PINCON->PINSEL0 |= (3 << 8); // pin30
ericbisson 14:bd909277eb13 216 initTimers();
ericbisson 8:5b87b1f9d91f 217 ThreadLecture.start(read);
ericbisson 0:c637467eeb8f 218
ericbisson 3:3ecbcc05bc85 219 while(true) {
ericbisson 0:c637467eeb8f 220 }
ericbisson 7:5501dbea5650 221 };