ADC Library
Revision 0:a6ef27377050, committed 2016-04-14
- Comitter:
- chrissnow
- Date:
- Thu Apr 14 09:52:09 2016 +0000
- Commit message:
- init;
Changed in this revision
MCP3424.cpp | Show annotated file Show diff for this revision Revisions of this file |
MCP3424.h | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MCP3424.cpp Thu Apr 14 09:52:09 2016 +0000 @@ -0,0 +1,174 @@ +/* MCP3424 library version 1.2 + +Writed by B@tto +Contact : batto@hotmail.fr + + + MCP3424.cpp - ADC 18 bits i2c library for Wiring & Arduino + Copyright (c) 2012 Yann LEFEBVRE. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ +#include <MCP3424.h> +#include "mbed.h" + +MCP3424::MCP3424(PinName SDA, PinName SCL, uint8_t adresse):i2c(SDA, SCL){ + +_adresse|=0x0D<<3; + _adresse = _adresse<<1; +//_adresse|=adresse; +} + +MCP3424::~MCP3424(){ + +} + + +void MCP3424::Configuration(char channel,char resolution,bool mode,char PGA){ +_PGA=PGA; + +if(resolution!=12 && resolution!=14 && resolution!=16 && resolution!=18) { +_resolution=12; +} else _resolution=resolution; + +_mode=mode; +_cfgbyte=0; +_cfgbyte=_cfgbyte<<2; +_cfgbyte|=(channel-1); +_cfgbyte=_cfgbyte<<1; +_cfgbyte|=mode; +_cfgbyte=_cfgbyte<<2; +_cfgbyte|=int((_resolution-12)/2); +_cfgbyte=_cfgbyte<<2; +switch(PGA) +{ + case 1: + _cfgbyte|=0x00; + + break; + case 2: + _cfgbyte|=0x01; + + break; + case 4: + _cfgbyte|=0x10; + + break; + case 8: + _cfgbyte|=0x11; + + break; + } + +i2c.write(_adresse,&_cfgbyte,1); + +} + +void MCP3424::NewConversion(){ + + char byte = _cfgbyte|=128; + i2c.write(_adresse,&byte,1); +} + +bool MCP3424::IsConversionFinished(){ + +if(_resolution!=18){ +_RequestedByte = 3; +} else _RequestedByte = 4; + +i2c.read(_adresse, _Buffer,_RequestedByte); + + +_testvariable = _Buffer[_RequestedByte-1]>>7; + +return _testvariable; + +} + + +long MCP3424::Measure(){ + + _resultat=0; + +while(IsConversionFinished()==1); + +switch (_resolution){ + +case 12: + _resultat = _Buffer[0]; + _resultat &= 0x0f;//0b00001111; + _resultat = _resultat << 8; +_resultat |= _Buffer[1]; + +if(_resultat>2048-1) { +_resultat=_resultat-4096-1; +} + + _resultat = _resultat*1000/_PGA; + + break; + + case 14: +_resultat = _Buffer[0]; + _resultat &= 0x3f;//0b00111111; +_resultat = _resultat << 8; + _resultat |= _Buffer[1]; + +if(_resultat>8192-1) { +_resultat=_resultat-16384-1; +} + +_resultat = _resultat*250/_PGA; + + break; + +case 16: + +_resultat = _Buffer[0]; +_resultat = _resultat << 8; +_resultat |= _Buffer[1]; + +if(_resultat>32768-1) { +_resultat=_resultat-65536-1; +} + +_resultat = _resultat*62.5/_PGA; + + break; + +case 18: + +_resultat = _Buffer[0]; + _resultat&=0x02;//0b00000011; + _resultat = _resultat << 8; + _resultat |= _Buffer[1]; + _resultat = _resultat << 8; + _resultat |= _Buffer[2]; + +if(_resultat>131072-1) { +_resultat=_resultat-262144-1; +} + +_resultat = _resultat*15.625/_PGA; + + break; +} + +return _resultat; + + +} + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MCP3424.h Thu Apr 14 09:52:09 2016 +0000 @@ -0,0 +1,60 @@ +/* MCP3424 library version 1.2 + +Writed by B@tto +Contact : batto@hotmail.fr + + + MCP3424.h - ADC 18 bits i2c library for Wiring & Arduino + Copyright (c) 2012 Yann LEFEBVRE. All right reserved. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ + + +#ifndef MCP3424_H +#define MCP3424_H + +#include "mbed.h" + + +class MCP3424 { + +public: + +MCP3424(PinName SDA, PinName SCL, uint8_t adresse); +~MCP3424(); +void Configuration(char channel,char resolution,bool mode,char PGA); +void NewConversion(); +bool IsConversionFinished(); +long Measure(); + +private: +I2C i2c; +int _adresse; +long _resultat; +char _resolution; +bool _mode; +char _i; +char _testvariable; +char _cfgbyte; +char _PGA; +char _RequestedByte; + +char _Buffer[4]; + +}; + +#endif +