Depot Pertamina / iButton

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iButton.cpp@14:2d0b5e0f0aed, 2020-08-26 (annotated)

Committer:
mauuuuul
Date:
Wed Aug 26 19:44:50 2020 +0000
Revision:
14:2d0b5e0f0aed
Parent:
OneWire.cpp@12:27a1b359b95c 
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
mauuuuul 14:2d0b5e0f0aed 1 #include "iButton.h"
hudakz 0:acf75feb0947 2
mauuuuul 14:2d0b5e0f0aed 3 extern Serial dbg;
hudakz 0:acf75feb0947 4
mauuuuul 14:2d0b5e0f0aed 5 iButton::iButton(PinName IO) : io(IO)
mauuuuul 14:2d0b5e0f0aed 6 {
mauuuuul 14:2d0b5e0f0aed 7 }
hudakz 0:acf75feb0947 8
mauuuuul 14:2d0b5e0f0aed 9 iButton::~iButton()
hudakz 7:acf3f0ee66d2 10 {
hudakz 0:acf75feb0947 11 }
hudakz 0:acf75feb0947 12
mauuuuul 14:2d0b5e0f0aed 13 void iButton::OneWireReset(void)
hudakz 0:acf75feb0947 14 {
mauuuuul 14:2d0b5e0f0aed 15 io.output();
mauuuuul 14:2d0b5e0f0aed 16 io = 0;
mauuuuul 14:2d0b5e0f0aed 17 wait_us(500);
mauuuuul 14:2d0b5e0f0aed 18 io.input();
mauuuuul 14:2d0b5e0f0aed 19 wait_us(500);
hudakz 0:acf75feb0947 20 }
hudakz 0:acf75feb0947 21
mauuuuul 14:2d0b5e0f0aed 22 void iButton::OneWireOutByte(unsigned char data)
hudakz 0:acf75feb0947 23 {
mauuuuul 14:2d0b5e0f0aed 24 for (int n = 8;n!=0; n--)
mauuuuul 14:2d0b5e0f0aed 25 {
mauuuuul 14:2d0b5e0f0aed 26 if ((data & 0x01) == 1)
mauuuuul 14:2d0b5e0f0aed 27 {
mauuuuul 14:2d0b5e0f0aed 28 io.output();
mauuuuul 14:2d0b5e0f0aed 29 io = 0;
mauuuuul 14:2d0b5e0f0aed 30 wait_us(5);
mauuuuul 14:2d0b5e0f0aed 31 io.input();
mauuuuul 14:2d0b5e0f0aed 32 wait_us(60);
mauuuuul 14:2d0b5e0f0aed 33 }
mauuuuul 14:2d0b5e0f0aed 34 else
mauuuuul 14:2d0b5e0f0aed 35 {
mauuuuul 14:2d0b5e0f0aed 36 io.output();
mauuuuul 14:2d0b5e0f0aed 37 wait_us(60);
mauuuuul 14:2d0b5e0f0aed 38 io.input();
mauuuuul 14:2d0b5e0f0aed 39 }
mauuuuul 14:2d0b5e0f0aed 40 data = data >> 1;
hudakz 0:acf75feb0947 41 }
hudakz 0:acf75feb0947 42 }
hudakz 0:acf75feb0947 43
mauuuuul 14:2d0b5e0f0aed 44 unsigned char iButton::OneWireReadByte(void)
hudakz 0:acf75feb0947 45 {
mauuuuul 14:2d0b5e0f0aed 46 unsigned char d = 0;
mauuuuul 14:2d0b5e0f0aed 47 unsigned char b;
mauuuuul 14:2d0b5e0f0aed 48 for (int n = 0; n<8; n++)
mauuuuul 14:2d0b5e0f0aed 49 {
mauuuuul 14:2d0b5e0f0aed 50 io.output();
mauuuuul 14:2d0b5e0f0aed 51 io = 0;
mauuuuul 14:2d0b5e0f0aed 52 wait_us(5);
mauuuuul 14:2d0b5e0f0aed 53 io.input();
mauuuuul 14:2d0b5e0f0aed 54 wait_us(5);
mauuuuul 14:2d0b5e0f0aed 55 b = io;
mauuuuul 14:2d0b5e0f0aed 56 wait_us(50);
mauuuuul 14:2d0b5e0f0aed 57 d = (d >> 1) | (b << 7);
mauuuuul 14:2d0b5e0f0aed 58 }
mauuuuul 14:2d0b5e0f0aed 59 return d;
hudakz 0:acf75feb0947 60 }
hudakz 0:acf75feb0947 61
mauuuuul 14:2d0b5e0f0aed 62 void iButton::ResetData()
hudakz 0:acf75feb0947 63 {
mauuuuul 14:2d0b5e0f0aed 64 detect.family = 0;
mauuuuul 14:2d0b5e0f0aed 65 detect.serial.clear();
mauuuuul 14:2d0b5e0f0aed 66 detect.crc = 0;
mauuuuul 14:2d0b5e0f0aed 67 detect.valid = false;
hudakz 0:acf75feb0947 68 }
hudakz 0:acf75feb0947 69
mauuuuul 14:2d0b5e0f0aed 70 void iButton::DetectiButton(void)
hudakz 0:acf75feb0947 71 {
mauuuuul 14:2d0b5e0f0aed 72 unsigned char crc = 0;
mauuuuul 14:2d0b5e0f0aed 73
mauuuuul 14:2d0b5e0f0aed 74 OneWireReset();
mauuuuul 14:2d0b5e0f0aed 75 OneWireOutByte(0x33);
mauuuuul 14:2d0b5e0f0aed 76
mauuuuul 14:2d0b5e0f0aed 77 ResetData();
mauuuuul 14:2d0b5e0f0aed 78
mauuuuul 14:2d0b5e0f0aed 79 detect.family = OneWireReadByte();
mauuuuul 14:2d0b5e0f0aed 80 crc = crc8(crc, detect.family);
mauuuuul 14:2d0b5e0f0aed 81 if (detect.family == 0x00 || detect.family == 0xFF)
mauuuuul 14:2d0b5e0f0aed 82 {
mauuuuul 14:2d0b5e0f0aed 83 detect.valid = false;
mauuuuul 14:2d0b5e0f0aed 84 return;
mauuuuul 14:2d0b5e0f0aed 85 }
mauuuuul 14:2d0b5e0f0aed 86
mauuuuul 14:2d0b5e0f0aed 87 for (int i = 0; i <6; i++)
mauuuuul 14:2d0b5e0f0aed 88 {
mauuuuul 14:2d0b5e0f0aed 89 // detect.serial[i] = OneWireReadByte();
mauuuuul 14:2d0b5e0f0aed 90 detect.serial.push_back(OneWireReadByte());
mauuuuul 14:2d0b5e0f0aed 91 crc = crc8(crc, detect.serial[i]);
mauuuuul 14:2d0b5e0f0aed 92 }
mauuuuul 14:2d0b5e0f0aed 93 detect.crc = OneWireReadByte();
mauuuuul 14:2d0b5e0f0aed 94 if (crc == detect.crc)
mauuuuul 14:2d0b5e0f0aed 95 {
mauuuuul 14:2d0b5e0f0aed 96 detect.valid = true;
mauuuuul 14:2d0b5e0f0aed 97 }
mauuuuul 14:2d0b5e0f0aed 98 //dbg.printf("[Detect Ibutton]\r\n");
mauuuuul 14:2d0b5e0f0aed 99 return;
hudakz 0:acf75feb0947 100 }
hudakz 0:acf75feb0947 101
mauuuuul 14:2d0b5e0f0aed 102 std::string conv(const unsigned char &val)
hudakz 0:acf75feb0947 103 {
mauuuuul 14:2d0b5e0f0aed 104 char st[5];
mauuuuul 14:2d0b5e0f0aed 105 sprintf(st,"%02X",val);
mauuuuul 14:2d0b5e0f0aed 106 return st;
mauuuuul 14:2d0b5e0f0aed 107 }
hudakz 0:acf75feb0947 108
mauuuuul 14:2d0b5e0f0aed 109 bool iButton::IsTaping(void)
mauuuuul 14:2d0b5e0f0aed 110 {
mauuuuul 14:2d0b5e0f0aed 111 return detect.valid;
mauuuuul 14:2d0b5e0f0aed 112 }
hudakz 0:acf75feb0947 113
mauuuuul 14:2d0b5e0f0aed 114 std::string iButton::GetData(void)
mauuuuul 14:2d0b5e0f0aed 115 {
mauuuuul 14:2d0b5e0f0aed 116 size_t sz = detect.serial.size();
mauuuuul 14:2d0b5e0f0aed 117 string ret = "";
mauuuuul 14:2d0b5e0f0aed 118
mauuuuul 14:2d0b5e0f0aed 119 for(int i=sz-1; i>=0; i--)
mauuuuul 14:2d0b5e0f0aed 120 {
mauuuuul 14:2d0b5e0f0aed 121 ret += conv(detect.serial[i]);
mauuuuul 14:2d0b5e0f0aed 122 }
mauuuuul 14:2d0b5e0f0aed 123 return ret;
mauuuuul 14:2d0b5e0f0aed 124 }
hudakz 0:acf75feb0947 125
mauuuuul 14:2d0b5e0f0aed 126 unsigned char iButton::crc8(unsigned char crc, unsigned char data)
mauuuuul 14:2d0b5e0f0aed 127 {
mauuuuul 14:2d0b5e0f0aed 128 crc = crc ^ data;
mauuuuul 14:2d0b5e0f0aed 129 for (int i = 0; i < 8; i++)
mauuuuul 14:2d0b5e0f0aed 130 {
mauuuuul 14:2d0b5e0f0aed 131 if (crc & 0x01)
mauuuuul 14:2d0b5e0f0aed 132 {
mauuuuul 14:2d0b5e0f0aed 133 crc = (crc >> 1) ^ 0x8C;
mauuuuul 14:2d0b5e0f0aed 134 }
mauuuuul 14:2d0b5e0f0aed 135 else
mauuuuul 14:2d0b5e0f0aed 136 {
mauuuuul 14:2d0b5e0f0aed 137 crc >>= 1;
hudakz 8:87fbdaba5535 138 }
hudakz 8:87fbdaba5535 139 }
hudakz 0:acf75feb0947 140 return crc;
hudakz 0:acf75feb0947 141 }