Diff: MCP3424.cpp

Revision:

0:a6ef27377050

--- /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;
+	
+
+}
+
+