Diff: mpr121.cpp

Revision:

1:d1837531c318

Parent:

0:2e5b82508aea

--- a/mpr121.cpp	Mon Feb 28 12:07:17 2011 +0000
+++ b/mpr121.cpp	Mon Feb 28 12:20:18 2011 +0000
@@ -1,201 +1,221 @@
+/*
+Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
 #include <mbed.h>
 #include <sstream>
 #include <string>
 #include <list>
 
 #include <mpr121.h>
+    
+Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
+{
+    this->i2c = i2c;
+    
+    address = i2cAddress;
+           
+    // Configure the MPR121 settings to default
+    this->configureSettings();
+}
 
-using namespace std;
+   
+void Mpr121::configureSettings()
+{
+    // Put the MPR into setup mode
+    this->write(ELE_CFG,0x00);
     
-    Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
-    {
-        this->i2c = i2c;
+    // Electrode filters for when data is > baseline
+    unsigned char gtBaseline[] = {
+         0x01,  //MHD_R
+         0x01,  //NHD_R 
+         0x00,  //NCL_R
+         0x00   //FDL_R
+         };
+         
+    writeMany(MHD_R,gtBaseline,4);   
+                 
+     // Electrode filters for when data is < baseline   
+     unsigned char ltBaseline[] = {
+        0x01,   //MHD_F
+        0x01,   //NHD_F
+        0xFF,   //NCL_F
+        0x02    //FDL_F
+        };
         
-        address = i2cAddress;
-               
-        // Configure the MPR121 settings to default
-        this->configureSettings();
-    }
-    
-       
-    void Mpr121::configureSettings()
-    {
-        // Put the MPR into setup mode
-        this->write(ELE_CFG,0x00);
+    writeMany(MHD_F,ltBaseline,4);
         
-        // Electrode filters for when data is > baseline
-        unsigned char gtBaseline[] = {
-             0x01,  //MHD_R
-             0x01,  //NHD_R 
-             0x00,  //NCL_R
-             0x00   //FDL_R
-             };
-             
-        writeMany(MHD_R,gtBaseline,4);   
-                     
-         // Electrode filters for when data is < baseline   
-         unsigned char ltBaseline[] = {
-            0x01,   //MHD_F
-            0x01,   //NHD_F
-            0xFF,   //NCL_F
-            0x02    //FDL_F
-            };
-            
-        writeMany(MHD_F,ltBaseline,4);
-            
-        // Electrode touch and release thresholds
-        unsigned char electrodeThresholds[] = {
-            E_THR_T, // Touch Threshhold
-            E_THR_R  // Release Threshold
-            };
+    // Electrode touch and release thresholds
+    unsigned char electrodeThresholds[] = {
+        E_THR_T, // Touch Threshhold
+        E_THR_R  // Release Threshold
+        };
+
+    for(int i=0; i<12; i++){
+        int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
+    }   
+
+    // Proximity Settings
+    unsigned char proximitySettings[] = {
+        0xff,   //MHD_Prox_R
+        0xff,   //NHD_Prox_R
+        0x00,   //NCL_Prox_R
+        0x00,   //FDL_Prox_R
+        0x01,   //MHD_Prox_F
+        0x01,   //NHD_Prox_F
+        0xFF,   //NCL_Prox_F
+        0xff,   //FDL_Prox_F
+        0x00,   //NHD_Prox_T
+        0x00,   //NCL_Prox_T
+        0x00    //NFD_Prox_T
+        };
+    writeMany(MHDPROXR,proximitySettings,11);
+
+    unsigned char proxThresh[] = {
+        PROX_THR_T, // Touch Threshold
+        PROX_THR_R  // Release Threshold
+        };
+    writeMany(EPROXTTH,proxThresh,2); 
+       
+    this->write(FIL_CFG,0x04);
+    
+    // Set the electrode config to transition to active mode
+    this->write(ELE_CFG,0x0c);
+}
 
-        for(int i=0; i<12; i++){
-            int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
-        }   
+void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
+    
+    if(electrode > 11) return;
+    
+    // Get the current mode
+    unsigned char mode = this->read(ELE_CFG);
+    
+    // Put the MPR into setup mode
+    this->write(ELE_CFG,0x00);
+    
+    // Write the new threshold
+    this->write((ELE0_T+(electrode*2)), touch);
+    this->write((ELE0_T+(electrode*2)+1), release);
+    
+    //Restore the operating mode
+    this->write(ELE_CFG, mode);
+}
+    
+    
+unsigned char Mpr121::read(int key){
+
+    unsigned char data[2];
+    
+    //Start the command
+    i2c->start();
+
+    // Address the target (Write mode)
+    int ack1= i2c->write(address);
+
+    // Set the register key to read
+    int ack2 = i2c->write(key);
+
+    // Re-start for read of data
+    i2c->start();
+
+    // Re-send the target address in read mode
+    int ack3 = i2c->write(address+1);
 
-        // Proximity Settings
-        unsigned char proximitySettings[] = {
-            0xff,   //MHD_Prox_R
-            0xff,   //NHD_Prox_R
-            0x00,   //NCL_Prox_R
-            0x00,   //FDL_Prox_R
-            0x01,   //MHD_Prox_F
-            0x01,   //NHD_Prox_F
-            0xFF,   //NCL_Prox_F
-            0xff,   //FDL_Prox_F
-            0x00,   //NHD_Prox_T
-            0x00,   //NCL_Prox_T
-            0x00    //NFD_Prox_T
-            };
-        writeMany(MHDPROXR,proximitySettings,11);
+    // Read in the result
+    data[0] = i2c->read(0); 
+
+    // Reset the bus        
+    i2c->stop();
+
+    return data[0];
+}
+
+
+int Mpr121::write(int key, unsigned char value){
+    
+    //Start the command
+    i2c->start();
+
+    // Address the target (Write mode)
+    int ack1= i2c->write(address);
 
-        unsigned char proxThresh[] = {
-            PROX_THR_T, // Touch Threshold
-            PROX_THR_R  // Release Threshold
-            };
-        writeMany(EPROXTTH,proxThresh,2); 
-           
-        this->write(FIL_CFG,0x04);
-        
-        // Set the electrode config to transition to active mode
-        this->write(ELE_CFG,0x0c);
+    // Set the register key to write
+    int ack2 = i2c->write(key);
+
+    // Read in the result
+    int ack3 = i2c->write(value); 
+
+    // Reset the bus        
+    i2c->stop();
+    
+    return (ack1+ack2+ack3)-3;
+}
+
+
+int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
+    //Start the command
+    i2c->start();
+
+    // Address the target (Write mode)
+    int ack= i2c->write(address);
+    if(ack!=1){
+        return -1;
     }
     
-    void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
-        
-        if(electrode > 11) return;
-        
-        // Get the current mode
-        unsigned char mode = this->read(ELE_CFG);
-        
-        // Put the MPR into setup mode
-        this->write(ELE_CFG,0x00);
-        
-        // Write the new threshold
-        this->write((ELE0_T+(electrode*2)), touch);
-        this->write((ELE0_T+(electrode*2)+1), release);
-        
-        //Restore the operating mode
-        this->write(ELE_CFG, mode);
-    }
-        
-        
-    unsigned char Mpr121::read(int key){
-
-        unsigned char data[2];
-        
-        //Start the command
-        i2c->start();
-
-        // Address the target (Write mode)
-        int ack1= i2c->write(address);
-
-        // Set the register key to read
-        int ack2 = i2c->write(key);
-
-        // Re-start for read of data
-        i2c->start();
-
-        // Re-send the target address in read mode
-        int ack3 = i2c->write(address+1);
-
-        // Read in the result
-        data[0] = i2c->read(0); 
-
-        // Reset the bus        
-        i2c->stop();
-
-        return data[0];
-    }
-    
-    
-    int Mpr121::write(int key, unsigned char value){
-        
-        //Start the command
-        i2c->start();
-
-        // Address the target (Write mode)
-        int ack1= i2c->write(address);
-
-        // Set the register key to write
-        int ack2 = i2c->write(key);
-
-        // Read in the result
-        int ack3 = i2c->write(value); 
-
-        // Reset the bus        
-        i2c->stop();
-        
-        return (ack1+ack2+ack3)-3;
-    }
-    
-    
-    int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
-        //Start the command
-        i2c->start();
-
-        // Address the target (Write mode)
-        int ack= i2c->write(address);
-        if(ack!=1){
-            return -1;
-        }
-        
-        // Set the register key to write
-        ack = i2c->write(start);
-        if(ack!=1){
-            return -1;
-        }
-
-        // Write the date set
-        int count = 0;
-        while(ack==1 && (count < length)){
-            ack = i2c->write(dataSet[count]);
-            count++;
-        } 
-        // Stop the cmd
-        i2c->stop();
-        
-        return count;
-    }
-          
-    
-    bool Mpr121::getProximityMode(){
-        if(this->read(ELE_CFG) > 0x0c)
-            return true;
-        else
-            return false;
-    }
-    
-    void Mpr121::setProximityMode(bool mode){
-        this->write(ELE_CFG,0x00);
-        if(mode){
-            this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
-        } else {
-            this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
-        }
+    // Set the register key to write
+    ack = i2c->write(start);
+    if(ack!=1){
+        return -1;
     }
 
+    // Write the date set
+    int count = 0;
+    while(ack==1 && (count < length)){
+        ack = i2c->write(dataSet[count]);
+        count++;
+    } 
+    // Stop the cmd
+    i2c->stop();
+    
+    return count;
+}
+      
 
-    int Mpr121::readTouchData(){
-        return this->read(0x00);
-    }
\ No newline at end of file
+bool Mpr121::getProximityMode(){
+    if(this->read(ELE_CFG) > 0x0c)
+        return true;
+    else
+        return false;
+}
+
+void Mpr121::setProximityMode(bool mode){
+    this->write(ELE_CFG,0x00);
+    if(mode){
+        this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
+    } else {
+        this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
+    }
+}
+
+
+int Mpr121::readTouchData(){
+    return this->read(0x00);
+}
\ No newline at end of file