Revision 0:4b472be1b25f, committed 2016-01-22

Comitter:

irsanjul

Date:

Fri Jan 22 08:44:44 2016 +0000

Commit message:

This is my library for IC ADC MPC3424

Changed in this revision

diff -r 000000000000 -r 4b472be1b25f MCP3424.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MCP3424.cpp	Fri Jan 22 08:44:44 2016 +0000
@@ -0,0 +1,145 @@
+#include "MCP3424.h"
+
+extern Serial pc;
+
+MCP3424::MCP3424(PinName sda, PinName scl) : mcp3424_i2c(sda, scl)
+{
+    mcp3424_i2c.frequency(MCP3424_FREQ);
+}
+
+MCP3424::~MCP3424(){
+
+}
+
+bool MCP3424::Config(uint8_t channel, uint8_t resolution, bool mode, uint8_t PGA)
+{
+    bool ok = false;
+    char addr = 0x00;
+    if(mcp3424_i2c.write(MCP3424_ADDR, &addr, 1) != 0)
+        return 0;
+        
+    _PGA = PGA;
+    _mode = mode;
+    
+    if(resolution != 12 && resolution != 14 && resolution != 16 && resolution != 18)
+    {
+        _resolution = 12;
+    } 
+    else _resolution = resolution;
+    
+    _cfgbyte =  0;
+    _cfgbyte =  _cfgbyte<<2;
+    _cfgbyte |= (channel-1);
+    _cfgbyte =  _cfgbyte<<1;
+    _cfgbyte |= _mode;
+    _cfgbyte =  _cfgbyte<<2;
+    _cfgbyte |= int((_resolution-12)/2);
+    _cfgbyte =  _cfgbyte<<2;
+    _cfgbyte |= 0x00;
+    
+    char _send = (char)_cfgbyte;
+    
+    if(mcp3424_i2c.write(MCP3424_ADDR, &_send, 1) ==0)
+    {
+        ok = true;
+    }
+    else 
+    {
+        ok = false;
+    }
+    return ok;
+}
+
+bool MCP3424::NewConversion()
+{
+    char _send = (char)(_cfgbyte |= 128);
+    if(mcp3424_i2c.write(MCP3424_ADDR, &_send, 1) != 0)
+        return 0;
+    else return 1;
+}
+
+bool MCP3424::IsConversionFinished()
+{
+    if(_resolution!=18)
+    {
+        _RequestedByte = 3;    
+    } 
+    else _RequestedByte = 4;
+    
+    
+    if(mcp3424_i2c.read(MCP3424_ADDR, _recvBuff, _RequestedByte)!= 0) return 0;
+    
+    for(_i = 0; _i < _RequestedByte; _i++)
+    {
+        _Buffer[_i] = _recvBuff[_i];
+    }
+
+    _testvariable = _Buffer[_RequestedByte-1]>>7;
+    
+    return _testvariable;
+}
+
+
+long MCP3424::Measure()
+{
+    _resultat=0;
+    
+    while(IsConversionFinished()==1);
+    
+    switch (_resolution)
+    {
+        case 12:{
+             _Buffer[0]&=0b00001111;
+             _resultat = _Buffer[0]*256 + _Buffer[1];
+    
+            if(_resultat>2048-1) 
+            {
+                _resultat=_resultat-4096-1;
+            }
+        
+            _resultat = _resultat*1000/_PGA;      
+           
+            break;
+        }
+        case 14:{
+            _Buffer[0]&=0b00111111;
+            _resultat = _Buffer[0]*256 + _Buffer[1];
+    
+            if(_resultat>8192-1)
+            {
+                _resultat=_resultat-16384-1;
+            }
+    
+            _resultat = _resultat*250/_PGA;  
+                   
+             break;
+        }
+        case 16:{
+            _resultat = _Buffer[0]*256 + _Buffer[1];
+                        
+            if(_resultat>32768-1) 
+            {
+                _resultat=_resultat-65536-1;
+            }
+            
+            _resultat = _resultat*62.5/_PGA;   
+            
+             break;
+      }
+        case 18:{
+             _Buffer[0]&=0b00000011;
+            _resultat = _Buffer[0]*512 + _Buffer[1]*256 + _Buffer[2];
+             
+            if(_resultat>131072-1) 
+            {
+                _resultat=_resultat-262144-1;
+            }
+            
+            _resultat = _resultat*15.625/_PGA; 
+            
+            break;
+        }
+    }
+    return _resultat;
+    
+}
\ No newline at end of file

diff -r 000000000000 -r 4b472be1b25f MCP3424.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MCP3424.h	Fri Jan 22 08:44:44 2016 +0000
@@ -0,0 +1,45 @@
+/*
+    This Library for ADC MCP3424.
+    I modif from ibrary at https://github.com/battosai30/MCP3424
+    I wish it's working good.
+*/
+
+#ifndef MCP3424_H
+#define MCP3424_H
+
+#include "mbed.h"
+//#include <math.h>
+
+#define MCP3424_ADDR     0xD0
+#define MCP3424_FREQ     100000
+
+class MCP3424 {
+
+public:
+    
+    MCP3424(PinName sda, PinName scl);
+    ~MCP3424();
+    bool Config(uint8_t channel,uint8_t resolution,bool mode,uint8_t PGA);
+    bool NewConversion();
+    bool IsConversionFinished();
+    long Measure();
+    
+private:
+    
+    I2C mcp3424_i2c;
+    
+    uint8_t _adresse;
+    long _resultat;
+    uint8_t _resolution;
+    bool _mode;
+    uint8_t _i;
+    uint8_t _testvariable;
+    uint8_t _cfgbyte;
+    uint8_t _PGA;
+    uint8_t _RequestedByte;
+    uint8_t _Buffer[4];
+    char _recvBuff[8];
+    long _res;
+};
+
+#endif
\ No newline at end of file