irsan julfikar / MPC3424

Library for MPC3424, it's my prototype library. work good.

Dependents:  

MCP3424.cpp@0:4b472be1b25f, 2016-01-22 (annotated)

Committer:
irsanjul
Date:
Fri Jan 22 08:44:44 2016 +0000
Revision:
0:4b472be1b25f
This is my library for IC ADC MPC3424

Who changed what in which revision?

UserRevisionLine numberNew contents of line
irsanjul 0:4b472be1b25f 1 #include "MCP3424.h"
irsanjul 0:4b472be1b25f 2
irsanjul 0:4b472be1b25f 3 extern Serial pc;
irsanjul 0:4b472be1b25f 4
irsanjul 0:4b472be1b25f 5 MCP3424::MCP3424(PinName sda, PinName scl) : mcp3424_i2c(sda, scl)
irsanjul 0:4b472be1b25f 6 {
irsanjul 0:4b472be1b25f 7 mcp3424_i2c.frequency(MCP3424_FREQ);
irsanjul 0:4b472be1b25f 8 }
irsanjul 0:4b472be1b25f 9
irsanjul 0:4b472be1b25f 10 MCP3424::~MCP3424(){
irsanjul 0:4b472be1b25f 11
irsanjul 0:4b472be1b25f 12 }
irsanjul 0:4b472be1b25f 13
irsanjul 0:4b472be1b25f 14 bool MCP3424::Config(uint8_t channel, uint8_t resolution, bool mode, uint8_t PGA)
irsanjul 0:4b472be1b25f 15 {
irsanjul 0:4b472be1b25f 16 bool ok = false;
irsanjul 0:4b472be1b25f 17 char addr = 0x00;
irsanjul 0:4b472be1b25f 18 if(mcp3424_i2c.write(MCP3424_ADDR, &addr, 1) != 0)
irsanjul 0:4b472be1b25f 19 return 0;
irsanjul 0:4b472be1b25f 20
irsanjul 0:4b472be1b25f 21 _PGA = PGA;
irsanjul 0:4b472be1b25f 22 _mode = mode;
irsanjul 0:4b472be1b25f 23
irsanjul 0:4b472be1b25f 24 if(resolution != 12 && resolution != 14 && resolution != 16 && resolution != 18)
irsanjul 0:4b472be1b25f 25 {
irsanjul 0:4b472be1b25f 26 _resolution = 12;
irsanjul 0:4b472be1b25f 27 }
irsanjul 0:4b472be1b25f 28 else _resolution = resolution;
irsanjul 0:4b472be1b25f 29
irsanjul 0:4b472be1b25f 30 _cfgbyte = 0;
irsanjul 0:4b472be1b25f 31 _cfgbyte = _cfgbyte<<2;
irsanjul 0:4b472be1b25f 32 _cfgbyte |= (channel-1);
irsanjul 0:4b472be1b25f 33 _cfgbyte = _cfgbyte<<1;
irsanjul 0:4b472be1b25f 34 _cfgbyte |= _mode;
irsanjul 0:4b472be1b25f 35 _cfgbyte = _cfgbyte<<2;
irsanjul 0:4b472be1b25f 36 _cfgbyte |= int((_resolution-12)/2);
irsanjul 0:4b472be1b25f 37 _cfgbyte = _cfgbyte<<2;
irsanjul 0:4b472be1b25f 38 _cfgbyte |= 0x00;
irsanjul 0:4b472be1b25f 39
irsanjul 0:4b472be1b25f 40 char _send = (char)_cfgbyte;
irsanjul 0:4b472be1b25f 41
irsanjul 0:4b472be1b25f 42 if(mcp3424_i2c.write(MCP3424_ADDR, &_send, 1) ==0)
irsanjul 0:4b472be1b25f 43 {
irsanjul 0:4b472be1b25f 44 ok = true;
irsanjul 0:4b472be1b25f 45 }
irsanjul 0:4b472be1b25f 46 else
irsanjul 0:4b472be1b25f 47 {
irsanjul 0:4b472be1b25f 48 ok = false;
irsanjul 0:4b472be1b25f 49 }
irsanjul 0:4b472be1b25f 50 return ok;
irsanjul 0:4b472be1b25f 51 }
irsanjul 0:4b472be1b25f 52
irsanjul 0:4b472be1b25f 53 bool MCP3424::NewConversion()
irsanjul 0:4b472be1b25f 54 {
irsanjul 0:4b472be1b25f 55 char _send = (char)(_cfgbyte |= 128);
irsanjul 0:4b472be1b25f 56 if(mcp3424_i2c.write(MCP3424_ADDR, &_send, 1) != 0)
irsanjul 0:4b472be1b25f 57 return 0;
irsanjul 0:4b472be1b25f 58 else return 1;
irsanjul 0:4b472be1b25f 59 }
irsanjul 0:4b472be1b25f 60
irsanjul 0:4b472be1b25f 61 bool MCP3424::IsConversionFinished()
irsanjul 0:4b472be1b25f 62 {
irsanjul 0:4b472be1b25f 63 if(_resolution!=18)
irsanjul 0:4b472be1b25f 64 {
irsanjul 0:4b472be1b25f 65 _RequestedByte = 3;
irsanjul 0:4b472be1b25f 66 }
irsanjul 0:4b472be1b25f 67 else _RequestedByte = 4;
irsanjul 0:4b472be1b25f 68
irsanjul 0:4b472be1b25f 69
irsanjul 0:4b472be1b25f 70 if(mcp3424_i2c.read(MCP3424_ADDR, _recvBuff, _RequestedByte)!= 0) return 0;
irsanjul 0:4b472be1b25f 71
irsanjul 0:4b472be1b25f 72 for(_i = 0; _i < _RequestedByte; _i++)
irsanjul 0:4b472be1b25f 73 {
irsanjul 0:4b472be1b25f 74 _Buffer[_i] = _recvBuff[_i];
irsanjul 0:4b472be1b25f 75 }
irsanjul 0:4b472be1b25f 76
irsanjul 0:4b472be1b25f 77 _testvariable = _Buffer[_RequestedByte-1]>>7;
irsanjul 0:4b472be1b25f 78
irsanjul 0:4b472be1b25f 79 return _testvariable;
irsanjul 0:4b472be1b25f 80 }
irsanjul 0:4b472be1b25f 81
irsanjul 0:4b472be1b25f 82
irsanjul 0:4b472be1b25f 83 long MCP3424::Measure()
irsanjul 0:4b472be1b25f 84 {
irsanjul 0:4b472be1b25f 85 _resultat=0;
irsanjul 0:4b472be1b25f 86
irsanjul 0:4b472be1b25f 87 while(IsConversionFinished()==1);
irsanjul 0:4b472be1b25f 88
irsanjul 0:4b472be1b25f 89 switch (_resolution)
irsanjul 0:4b472be1b25f 90 {
irsanjul 0:4b472be1b25f 91 case 12:{
irsanjul 0:4b472be1b25f 92 _Buffer[0]&=0b00001111;
irsanjul 0:4b472be1b25f 93 _resultat = _Buffer[0]*256 + _Buffer[1];
irsanjul 0:4b472be1b25f 94
irsanjul 0:4b472be1b25f 95 if(_resultat>2048-1)
irsanjul 0:4b472be1b25f 96 {
irsanjul 0:4b472be1b25f 97 _resultat=_resultat-4096-1;
irsanjul 0:4b472be1b25f 98 }
irsanjul 0:4b472be1b25f 99
irsanjul 0:4b472be1b25f 100 _resultat = _resultat*1000/_PGA;
irsanjul 0:4b472be1b25f 101
irsanjul 0:4b472be1b25f 102 break;
irsanjul 0:4b472be1b25f 103 }
irsanjul 0:4b472be1b25f 104 case 14:{
irsanjul 0:4b472be1b25f 105 _Buffer[0]&=0b00111111;
irsanjul 0:4b472be1b25f 106 _resultat = _Buffer[0]*256 + _Buffer[1];
irsanjul 0:4b472be1b25f 107
irsanjul 0:4b472be1b25f 108 if(_resultat>8192-1)
irsanjul 0:4b472be1b25f 109 {
irsanjul 0:4b472be1b25f 110 _resultat=_resultat-16384-1;
irsanjul 0:4b472be1b25f 111 }
irsanjul 0:4b472be1b25f 112
irsanjul 0:4b472be1b25f 113 _resultat = _resultat*250/_PGA;
irsanjul 0:4b472be1b25f 114
irsanjul 0:4b472be1b25f 115 break;
irsanjul 0:4b472be1b25f 116 }
irsanjul 0:4b472be1b25f 117 case 16:{
irsanjul 0:4b472be1b25f 118 _resultat = _Buffer[0]*256 + _Buffer[1];
irsanjul 0:4b472be1b25f 119
irsanjul 0:4b472be1b25f 120 if(_resultat>32768-1)
irsanjul 0:4b472be1b25f 121 {
irsanjul 0:4b472be1b25f 122 _resultat=_resultat-65536-1;
irsanjul 0:4b472be1b25f 123 }
irsanjul 0:4b472be1b25f 124
irsanjul 0:4b472be1b25f 125 _resultat = _resultat*62.5/_PGA;
irsanjul 0:4b472be1b25f 126
irsanjul 0:4b472be1b25f 127 break;
irsanjul 0:4b472be1b25f 128 }
irsanjul 0:4b472be1b25f 129 case 18:{
irsanjul 0:4b472be1b25f 130 _Buffer[0]&=0b00000011;
irsanjul 0:4b472be1b25f 131 _resultat = _Buffer[0]*512 + _Buffer[1]*256 + _Buffer[2];
irsanjul 0:4b472be1b25f 132
irsanjul 0:4b472be1b25f 133 if(_resultat>131072-1)
irsanjul 0:4b472be1b25f 134 {
irsanjul 0:4b472be1b25f 135 _resultat=_resultat-262144-1;
irsanjul 0:4b472be1b25f 136 }
irsanjul 0:4b472be1b25f 137
irsanjul 0:4b472be1b25f 138 _resultat = _resultat*15.625/_PGA;
irsanjul 0:4b472be1b25f 139
irsanjul 0:4b472be1b25f 140 break;
irsanjul 0:4b472be1b25f 141 }
irsanjul 0:4b472be1b25f 142 }
irsanjul 0:4b472be1b25f 143 return _resultat;
irsanjul 0:4b472be1b25f 144
irsanjul 0:4b472be1b25f 145 }