Vincent Belanger / Mbed 2 deprecated APP4

APP 4

Dependencies:   mbed CRC16 mbed-rtos

MEF.cpp@26:f2b37f9dfca9, 2016-02-23 (annotated)

Committer:
vinbel93
Date:
Tue Feb 23 20:56:47 2016 +0000
Revision:
26:f2b37f9dfca9
Parent:
23:d41a23d8f2d7
Child:
27:011ad1667040
Version clean pour le rapport

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vinbel93 26:f2b37f9dfca9 1 // Vincent Bélanger et Laurent Mandrile
vinbel93 26:f2b37f9dfca9 2 // belv1802 - manl2003
vinbel93 26:f2b37f9dfca9 3
manl2003 10:51ee22e230c7 4 #include "MEF.h"
manl2003 12:715af3660c73 5 #include "CRC16.h"
manl2003 10:51ee22e230c7 6
vinbel93 20:f0932bfe09ed 7 void MEF::init()
vinbel93 20:f0932bfe09ed 8 {
vinbel93 20:f0932bfe09ed 9 m_InputBuffer.reset();
vinbel93 20:f0932bfe09ed 10 m_BSPayload.reset();
vinbel93 20:f0932bfe09ed 11 memset(m_CPayload, 0, 80);
vinbel93 20:f0932bfe09ed 12 m_Counter = 0;
vinbel93 20:f0932bfe09ed 13 m_DataSize = 0;
vinbel93 20:f0932bfe09ed 14 m_CRC = 0;
vinbel93 20:f0932bfe09ed 15 }
vinbel93 20:f0932bfe09ed 16
manl2003 10:51ee22e230c7 17 void MEF::ReceiveBit(bool bit)
manl2003 10:51ee22e230c7 18 {
manl2003 10:51ee22e230c7 19 switch (state)
manl2003 10:51ee22e230c7 20 {
manl2003 23:d41a23d8f2d7 21 case PREAMBLE :
manl2003 23:d41a23d8f2d7 22 default :
manl2003 10:51ee22e230c7 23 {
manl2003 23:d41a23d8f2d7 24 m_InputBuffer[0] = m_InputBuffer[1];
manl2003 23:d41a23d8f2d7 25 m_InputBuffer[1] = m_InputBuffer[2];
manl2003 23:d41a23d8f2d7 26 m_InputBuffer[2] = m_InputBuffer[3];
manl2003 23:d41a23d8f2d7 27 m_InputBuffer[3] = m_InputBuffer[4];
manl2003 23:d41a23d8f2d7 28 m_InputBuffer[4] = m_InputBuffer[5];
manl2003 23:d41a23d8f2d7 29 m_InputBuffer[5] = m_InputBuffer[6];
manl2003 23:d41a23d8f2d7 30 m_InputBuffer[6] = m_InputBuffer[7];
manl2003 23:d41a23d8f2d7 31 m_InputBuffer[7] = bit;
manl2003 23:d41a23d8f2d7 32
manl2003 23:d41a23d8f2d7 33 if(preambleChecker())
manl2003 10:51ee22e230c7 34 {
manl2003 23:d41a23d8f2d7 35 state = START;
manl2003 10:51ee22e230c7 36 }
manl2003 10:51ee22e230c7 37
manl2003 10:51ee22e230c7 38 }break;
manl2003 10:51ee22e230c7 39 case START :
manl2003 10:51ee22e230c7 40 {
manl2003 10:51ee22e230c7 41 m_InputBuffer[m_Counter] = bit;
manl2003 10:51ee22e230c7 42 m_Counter++;
manl2003 23:d41a23d8f2d7 43 if(m_Counter >= 8)
manl2003 10:51ee22e230c7 44 {
vinbel93 20:f0932bfe09ed 45 if(startChecker())
vinbel93 20:f0932bfe09ed 46 {
vinbel93 20:f0932bfe09ed 47 state = TYPE;
vinbel93 20:f0932bfe09ed 48 m_Counter = 0;
vinbel93 20:f0932bfe09ed 49 }
vinbel93 20:f0932bfe09ed 50 else
vinbel93 20:f0932bfe09ed 51 {
vinbel93 20:f0932bfe09ed 52 //Bluboom
vinbel93 20:f0932bfe09ed 53 _decodeError();
vinbel93 20:f0932bfe09ed 54 state = PREAMBLE;
vinbel93 20:f0932bfe09ed 55 init();
vinbel93 20:f0932bfe09ed 56 }
vinbel93 20:f0932bfe09ed 57 }
manl2003 10:51ee22e230c7 58 }break;
manl2003 10:51ee22e230c7 59 case TYPE :
manl2003 10:51ee22e230c7 60 {
manl2003 10:51ee22e230c7 61 m_Counter ++;
manl2003 23:d41a23d8f2d7 62 if(m_Counter >= 8)
manl2003 10:51ee22e230c7 63 {
manl2003 10:51ee22e230c7 64 state = LENGTH;
manl2003 10:51ee22e230c7 65 m_Counter = 0;
manl2003 10:51ee22e230c7 66 }
manl2003 10:51ee22e230c7 67
manl2003 10:51ee22e230c7 68 }break;
manl2003 10:51ee22e230c7 69 case LENGTH :
manl2003 10:51ee22e230c7 70 {
manl2003 10:51ee22e230c7 71 m_InputBuffer[m_Counter] = bit;
manl2003 10:51ee22e230c7 72 m_Counter++;
manl2003 23:d41a23d8f2d7 73 if(m_Counter >= 8)
manl2003 10:51ee22e230c7 74 {
manl2003 10:51ee22e230c7 75 state = DATA;
manl2003 10:51ee22e230c7 76 m_DataSize = calculateSize();
manl2003 10:51ee22e230c7 77 m_Counter = 0;
manl2003 10:51ee22e230c7 78 }
manl2003 10:51ee22e230c7 79
manl2003 10:51ee22e230c7 80 }break;
manl2003 10:51ee22e230c7 81 case DATA :
manl2003 10:51ee22e230c7 82 {
manl2003 12:715af3660c73 83 m_BSPayload[m_Counter] = bit;
vinbel93 20:f0932bfe09ed 84 if (((m_Counter + 1) % 8) == 0 && m_Counter != 0)
manl2003 12:715af3660c73 85 {
vinbel93 20:f0932bfe09ed 86 m_CPayload[(m_Counter + 1)/ 8 - 1] = (m_BSPayload[m_Counter] << 0) | (m_BSPayload[m_Counter - 1] << 1) | (m_BSPayload[m_Counter - 2] << 2) | (m_BSPayload[m_Counter - 3] << 3) | (m_BSPayload[m_Counter - 4] << 4) | (m_BSPayload[m_Counter - 5] << 5) | (m_BSPayload[m_Counter - 6] << 6) | (m_BSPayload[m_Counter - 7] << 7);
manl2003 12:715af3660c73 87 }
manl2003 12:715af3660c73 88 m_Counter++;
manl2003 23:d41a23d8f2d7 89 if(m_Counter >= m_DataSize*8)
manl2003 12:715af3660c73 90 {
manl2003 12:715af3660c73 91 state = CRC16STATE;
vinbel93 20:f0932bfe09ed 92 m_CRC = CRC16::calculateCRC16(m_CPayload, m_DataSize);
vinbel93 20:f0932bfe09ed 93 m_Counter = 0;
manl2003 12:715af3660c73 94 }
manl2003 10:51ee22e230c7 95 }break;
manl2003 12:715af3660c73 96 case CRC16STATE :
manl2003 10:51ee22e230c7 97 {
manl2003 12:715af3660c73 98 m_InputBuffer[m_Counter] = bit;
manl2003 12:715af3660c73 99 m_Counter++;
manl2003 23:d41a23d8f2d7 100 if(m_Counter >= 16)
manl2003 12:715af3660c73 101 {
manl2003 12:715af3660c73 102 if(!compareCRC())
manl2003 12:715af3660c73 103 {
manl2003 12:715af3660c73 104 //BOOMBOOM
vinbel93 20:f0932bfe09ed 105 _decodeError();
vinbel93 20:f0932bfe09ed 106 state = PREAMBLE;
vinbel93 20:f0932bfe09ed 107 init();
manl2003 12:715af3660c73 108 }
manl2003 16:cf433716f8d6 109 else
manl2003 16:cf433716f8d6 110 {
vinbel93 20:f0932bfe09ed 111 state = END;
manl2003 16:cf433716f8d6 112 }
manl2003 12:715af3660c73 113 m_Counter = 0;
manl2003 12:715af3660c73 114 }
manl2003 10:51ee22e230c7 115
manl2003 10:51ee22e230c7 116 }break;
manl2003 10:51ee22e230c7 117 case END :
manl2003 10:51ee22e230c7 118 {
manl2003 12:715af3660c73 119 m_InputBuffer[m_Counter] = bit;
manl2003 12:715af3660c73 120 m_Counter++;
manl2003 23:d41a23d8f2d7 121 if(m_Counter >= 8)
manl2003 12:715af3660c73 122 {
vinbel93 20:f0932bfe09ed 123 if(startChecker())
vinbel93 20:f0932bfe09ed 124 {
vinbel93 20:f0932bfe09ed 125 state = PREAMBLE;
vinbel93 20:f0932bfe09ed 126 m_Counter = 0;
vinbel93 20:f0932bfe09ed 127 //CALLBACK
vinbel93 20:f0932bfe09ed 128 _decodeCallback(m_BSPayload, m_DataSize);
vinbel93 20:f0932bfe09ed 129 }
vinbel93 20:f0932bfe09ed 130 else
vinbel93 20:f0932bfe09ed 131 {
vinbel93 20:f0932bfe09ed 132 //BOOMBOOM
vinbel93 20:f0932bfe09ed 133 _decodeError();
vinbel93 20:f0932bfe09ed 134 state = PREAMBLE;
vinbel93 20:f0932bfe09ed 135 init();
vinbel93 20:f0932bfe09ed 136 }
manl2003 12:715af3660c73 137 }
vinbel93 20:f0932bfe09ed 138
manl2003 10:51ee22e230c7 139 }break;
manl2003 10:51ee22e230c7 140 }
manl2003 16:cf433716f8d6 141 _updateState(state);
manl2003 10:51ee22e230c7 142 }
manl2003 10:51ee22e230c7 143
manl2003 10:51ee22e230c7 144 bool MEF::preambleChecker()
manl2003 10:51ee22e230c7 145 {
manl2003 10:51ee22e230c7 146 bool temp = false;
manl2003 10:51ee22e230c7 147 bool resultTest1 = true, resultTest2 = true;
manl2003 10:51ee22e230c7 148 for(int i = 0; i < 8; i++)
manl2003 10:51ee22e230c7 149 {
manl2003 10:51ee22e230c7 150 if(m_InputBuffer[i] != temp)
manl2003 10:51ee22e230c7 151 {
manl2003 10:51ee22e230c7 152 resultTest1 = false;
manl2003 10:51ee22e230c7 153 }
manl2003 10:51ee22e230c7 154 if(m_InputBuffer[i] == temp)
manl2003 10:51ee22e230c7 155 {
manl2003 10:51ee22e230c7 156 resultTest2 = false;
manl2003 10:51ee22e230c7 157 }
manl2003 10:51ee22e230c7 158 temp = !temp;
manl2003 10:51ee22e230c7 159 }
manl2003 10:51ee22e230c7 160 return resultTest1 || resultTest2;
manl2003 10:51ee22e230c7 161 }
manl2003 10:51ee22e230c7 162
manl2003 10:51ee22e230c7 163 bool MEF::startChecker()
manl2003 10:51ee22e230c7 164 {
manl2003 10:51ee22e230c7 165 if(m_InputBuffer[0] == 0 && m_InputBuffer[1] == 1 && m_InputBuffer[2] == 1 && m_InputBuffer[3] == 1 && m_InputBuffer[4] == 1 && m_InputBuffer[5] == 1 && m_InputBuffer[6] == 1 && m_InputBuffer[7] == 0)
manl2003 10:51ee22e230c7 166 {
manl2003 10:51ee22e230c7 167 return true;
manl2003 10:51ee22e230c7 168 }
manl2003 10:51ee22e230c7 169 return false;
manl2003 10:51ee22e230c7 170 }
manl2003 10:51ee22e230c7 171
manl2003 10:51ee22e230c7 172 int MEF::calculateSize()
manl2003 10:51ee22e230c7 173 {
manl2003 10:51ee22e230c7 174 return (m_InputBuffer[0] << 7) | (m_InputBuffer[1] << 6) | (m_InputBuffer[2] << 5) | (m_InputBuffer[3] << 4) | (m_InputBuffer[4] << 3) | (m_InputBuffer[5] << 2) | (m_InputBuffer[6] << 1) | (m_InputBuffer[7] << 0);
manl2003 12:715af3660c73 175 }
manl2003 12:715af3660c73 176
manl2003 12:715af3660c73 177 bool MEF::compareCRC()
manl2003 12:715af3660c73 178 {
vinbel93 20:f0932bfe09ed 179 unsigned short incommingCRC = (m_InputBuffer[0] << 15) |
vinbel93 20:f0932bfe09ed 180 (m_InputBuffer[1] << 14) |
vinbel93 20:f0932bfe09ed 181 (m_InputBuffer[2] << 13) |
vinbel93 20:f0932bfe09ed 182 (m_InputBuffer[3] << 12) |
vinbel93 20:f0932bfe09ed 183 (m_InputBuffer[4] << 11) |
vinbel93 20:f0932bfe09ed 184 (m_InputBuffer[5] << 10) |
vinbel93 20:f0932bfe09ed 185 (m_InputBuffer[6] << 9) |
vinbel93 20:f0932bfe09ed 186 (m_InputBuffer[7] << 8) |
vinbel93 20:f0932bfe09ed 187 (m_InputBuffer[8] << 7) |
vinbel93 20:f0932bfe09ed 188 (m_InputBuffer[9] << 6) |
vinbel93 20:f0932bfe09ed 189 (m_InputBuffer[10] << 5) |
vinbel93 20:f0932bfe09ed 190 (m_InputBuffer[11] << 4) |
vinbel93 20:f0932bfe09ed 191 (m_InputBuffer[12] << 3) |
vinbel93 20:f0932bfe09ed 192 (m_InputBuffer[13] << 2) |
vinbel93 20:f0932bfe09ed 193 (m_InputBuffer[14] << 1) |
vinbel93 20:f0932bfe09ed 194 (m_InputBuffer[15] << 0);
vinbel93 20:f0932bfe09ed 195
manl2003 12:715af3660c73 196 return m_CRC == incommingCRC;
manl2003 12:715af3660c73 197 }
manl2003 12:715af3660c73 198
manl2003 12:715af3660c73 199 void MEF::error()
manl2003 12:715af3660c73 200 {
manl2003 12:715af3660c73 201
manl2003 10:51ee22e230c7 202 }