Dhruv Bhatt / Mbed 2 deprecated final_proj1

Bank Account Security System

Dependencies:   FatFileSystemSD mbed

mpr121.cpp@0:7e4786a3584b, 2012-10-11 (annotated)

Committer:
Dhruv_Varun
Date:
Thu Oct 11 20:49:25 2012 +0000
Revision:
0:7e4786a3584b
Code For Bank Account Security System

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Dhruv_Varun 0:7e4786a3584b 1 /*
Dhruv_Varun 0:7e4786a3584b 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
Dhruv_Varun 0:7e4786a3584b 3
Dhruv_Varun 0:7e4786a3584b 4 Permission is hereby granted, free of charge, to any person obtaining a copy
Dhruv_Varun 0:7e4786a3584b 5 of this software and associated documentation files (the "Software"), to deal
Dhruv_Varun 0:7e4786a3584b 6 in the Software without restriction, including without limitation the rights
Dhruv_Varun 0:7e4786a3584b 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Dhruv_Varun 0:7e4786a3584b 8 copies of the Software, and to permit persons to whom the Software is
Dhruv_Varun 0:7e4786a3584b 9 furnished to do so, subject to the following conditions:
Dhruv_Varun 0:7e4786a3584b 10
Dhruv_Varun 0:7e4786a3584b 11 The above copyright notice and this permission notice shall be included in
Dhruv_Varun 0:7e4786a3584b 12 all copies or substantial portions of the Software.
Dhruv_Varun 0:7e4786a3584b 13
Dhruv_Varun 0:7e4786a3584b 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Dhruv_Varun 0:7e4786a3584b 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Dhruv_Varun 0:7e4786a3584b 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Dhruv_Varun 0:7e4786a3584b 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Dhruv_Varun 0:7e4786a3584b 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Dhruv_Varun 0:7e4786a3584b 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Dhruv_Varun 0:7e4786a3584b 20 THE SOFTWARE.
Dhruv_Varun 0:7e4786a3584b 21 */
Dhruv_Varun 0:7e4786a3584b 22
Dhruv_Varun 0:7e4786a3584b 23 #include <mbed.h>
Dhruv_Varun 0:7e4786a3584b 24 #include <sstream>
Dhruv_Varun 0:7e4786a3584b 25 #include <string>
Dhruv_Varun 0:7e4786a3584b 26 #include <list>
Dhruv_Varun 0:7e4786a3584b 27
Dhruv_Varun 0:7e4786a3584b 28 #include <mpr121.h>
Dhruv_Varun 0:7e4786a3584b 29
Dhruv_Varun 0:7e4786a3584b 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
Dhruv_Varun 0:7e4786a3584b 31 {
Dhruv_Varun 0:7e4786a3584b 32 this->i2c = i2c;
Dhruv_Varun 0:7e4786a3584b 33
Dhruv_Varun 0:7e4786a3584b 34 address = i2cAddress;
Dhruv_Varun 0:7e4786a3584b 35
Dhruv_Varun 0:7e4786a3584b 36 // Configure the MPR121 settings to default
Dhruv_Varun 0:7e4786a3584b 37 this->configureSettings();
Dhruv_Varun 0:7e4786a3584b 38 }
Dhruv_Varun 0:7e4786a3584b 39
Dhruv_Varun 0:7e4786a3584b 40
Dhruv_Varun 0:7e4786a3584b 41 void Mpr121::configureSettings()
Dhruv_Varun 0:7e4786a3584b 42 {
Dhruv_Varun 0:7e4786a3584b 43 // Put the MPR into setup mode
Dhruv_Varun 0:7e4786a3584b 44 this->write(ELE_CFG,0x00);
Dhruv_Varun 0:7e4786a3584b 45
Dhruv_Varun 0:7e4786a3584b 46 // Electrode filters for when data is > baseline
Dhruv_Varun 0:7e4786a3584b 47 unsigned char gtBaseline[] = {
Dhruv_Varun 0:7e4786a3584b 48 0x01, //MHD_R
Dhruv_Varun 0:7e4786a3584b 49 0x01, //NHD_R
Dhruv_Varun 0:7e4786a3584b 50 0x00, //NCL_R
Dhruv_Varun 0:7e4786a3584b 51 0x00 //FDL_R
Dhruv_Varun 0:7e4786a3584b 52 };
Dhruv_Varun 0:7e4786a3584b 53
Dhruv_Varun 0:7e4786a3584b 54 writeMany(MHD_R,gtBaseline,4);
Dhruv_Varun 0:7e4786a3584b 55
Dhruv_Varun 0:7e4786a3584b 56 // Electrode filters for when data is < baseline
Dhruv_Varun 0:7e4786a3584b 57 unsigned char ltBaseline[] = {
Dhruv_Varun 0:7e4786a3584b 58 0x01, //MHD_F
Dhruv_Varun 0:7e4786a3584b 59 0x01, //NHD_F
Dhruv_Varun 0:7e4786a3584b 60 0xFF, //NCL_F
Dhruv_Varun 0:7e4786a3584b 61 0x02 //FDL_F
Dhruv_Varun 0:7e4786a3584b 62 };
Dhruv_Varun 0:7e4786a3584b 63
Dhruv_Varun 0:7e4786a3584b 64 writeMany(MHD_F,ltBaseline,4);
Dhruv_Varun 0:7e4786a3584b 65
Dhruv_Varun 0:7e4786a3584b 66 // Electrode touch and release thresholds
Dhruv_Varun 0:7e4786a3584b 67 unsigned char electrodeThresholds[] = {
Dhruv_Varun 0:7e4786a3584b 68 E_THR_T, // Touch Threshhold
Dhruv_Varun 0:7e4786a3584b 69 E_THR_R // Release Threshold
Dhruv_Varun 0:7e4786a3584b 70 };
Dhruv_Varun 0:7e4786a3584b 71
Dhruv_Varun 0:7e4786a3584b 72 for(int i=0; i<12; i++){
Dhruv_Varun 0:7e4786a3584b 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
Dhruv_Varun 0:7e4786a3584b 74 }
Dhruv_Varun 0:7e4786a3584b 75
Dhruv_Varun 0:7e4786a3584b 76 // Proximity Settings
Dhruv_Varun 0:7e4786a3584b 77 unsigned char proximitySettings[] = {
Dhruv_Varun 0:7e4786a3584b 78 0xff, //MHD_Prox_R
Dhruv_Varun 0:7e4786a3584b 79 0xff, //NHD_Prox_R
Dhruv_Varun 0:7e4786a3584b 80 0x00, //NCL_Prox_R
Dhruv_Varun 0:7e4786a3584b 81 0x00, //FDL_Prox_R
Dhruv_Varun 0:7e4786a3584b 82 0x01, //MHD_Prox_F
Dhruv_Varun 0:7e4786a3584b 83 0x01, //NHD_Prox_F
Dhruv_Varun 0:7e4786a3584b 84 0xFF, //NCL_Prox_F
Dhruv_Varun 0:7e4786a3584b 85 0xff, //FDL_Prox_F
Dhruv_Varun 0:7e4786a3584b 86 0x00, //NHD_Prox_T
Dhruv_Varun 0:7e4786a3584b 87 0x00, //NCL_Prox_T
Dhruv_Varun 0:7e4786a3584b 88 0x00 //NFD_Prox_T
Dhruv_Varun 0:7e4786a3584b 89 };
Dhruv_Varun 0:7e4786a3584b 90 writeMany(MHDPROXR,proximitySettings,11);
Dhruv_Varun 0:7e4786a3584b 91
Dhruv_Varun 0:7e4786a3584b 92 unsigned char proxThresh[] = {
Dhruv_Varun 0:7e4786a3584b 93 PROX_THR_T, // Touch Threshold
Dhruv_Varun 0:7e4786a3584b 94 PROX_THR_R // Release Threshold
Dhruv_Varun 0:7e4786a3584b 95 };
Dhruv_Varun 0:7e4786a3584b 96 writeMany(EPROXTTH,proxThresh,2);
Dhruv_Varun 0:7e4786a3584b 97
Dhruv_Varun 0:7e4786a3584b 98 this->write(FIL_CFG,0x04);
Dhruv_Varun 0:7e4786a3584b 99
Dhruv_Varun 0:7e4786a3584b 100 // Set the electrode config to transition to active mode
Dhruv_Varun 0:7e4786a3584b 101 this->write(ELE_CFG,0x0c);
Dhruv_Varun 0:7e4786a3584b 102 }
Dhruv_Varun 0:7e4786a3584b 103
Dhruv_Varun 0:7e4786a3584b 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
Dhruv_Varun 0:7e4786a3584b 105
Dhruv_Varun 0:7e4786a3584b 106 if(electrode > 11) return;
Dhruv_Varun 0:7e4786a3584b 107
Dhruv_Varun 0:7e4786a3584b 108 // Get the current mode
Dhruv_Varun 0:7e4786a3584b 109 unsigned char mode = this->read(ELE_CFG);
Dhruv_Varun 0:7e4786a3584b 110
Dhruv_Varun 0:7e4786a3584b 111 // Put the MPR into setup mode
Dhruv_Varun 0:7e4786a3584b 112 this->write(ELE_CFG,0x00);
Dhruv_Varun 0:7e4786a3584b 113
Dhruv_Varun 0:7e4786a3584b 114 // Write the new threshold
Dhruv_Varun 0:7e4786a3584b 115 this->write((ELE0_T+(electrode*2)), touch);
Dhruv_Varun 0:7e4786a3584b 116 this->write((ELE0_T+(electrode*2)+1), release);
Dhruv_Varun 0:7e4786a3584b 117
Dhruv_Varun 0:7e4786a3584b 118 //Restore the operating mode
Dhruv_Varun 0:7e4786a3584b 119 this->write(ELE_CFG, mode);
Dhruv_Varun 0:7e4786a3584b 120 }
Dhruv_Varun 0:7e4786a3584b 121
Dhruv_Varun 0:7e4786a3584b 122
Dhruv_Varun 0:7e4786a3584b 123 unsigned char Mpr121::read(int key){
Dhruv_Varun 0:7e4786a3584b 124
Dhruv_Varun 0:7e4786a3584b 125 unsigned char data[2];
Dhruv_Varun 0:7e4786a3584b 126
Dhruv_Varun 0:7e4786a3584b 127 //Start the command
Dhruv_Varun 0:7e4786a3584b 128 i2c->start();
Dhruv_Varun 0:7e4786a3584b 129
Dhruv_Varun 0:7e4786a3584b 130 // Address the target (Write mode)
Dhruv_Varun 0:7e4786a3584b 131 int ack1= i2c->write(address);
Dhruv_Varun 0:7e4786a3584b 132
Dhruv_Varun 0:7e4786a3584b 133 // Set the register key to read
Dhruv_Varun 0:7e4786a3584b 134 int ack2 = i2c->write(key);
Dhruv_Varun 0:7e4786a3584b 135
Dhruv_Varun 0:7e4786a3584b 136 // Re-start for read of data
Dhruv_Varun 0:7e4786a3584b 137 i2c->start();
Dhruv_Varun 0:7e4786a3584b 138
Dhruv_Varun 0:7e4786a3584b 139 // Re-send the target address in read mode
Dhruv_Varun 0:7e4786a3584b 140 int ack3 = i2c->write(address+1);
Dhruv_Varun 0:7e4786a3584b 141
Dhruv_Varun 0:7e4786a3584b 142 // Read in the result
Dhruv_Varun 0:7e4786a3584b 143 data[0] = i2c->read(0);
Dhruv_Varun 0:7e4786a3584b 144
Dhruv_Varun 0:7e4786a3584b 145 // Reset the bus
Dhruv_Varun 0:7e4786a3584b 146 i2c->stop();
Dhruv_Varun 0:7e4786a3584b 147
Dhruv_Varun 0:7e4786a3584b 148 return data[0];
Dhruv_Varun 0:7e4786a3584b 149 }
Dhruv_Varun 0:7e4786a3584b 150
Dhruv_Varun 0:7e4786a3584b 151
Dhruv_Varun 0:7e4786a3584b 152 int Mpr121::write(int key, unsigned char value){
Dhruv_Varun 0:7e4786a3584b 153
Dhruv_Varun 0:7e4786a3584b 154 //Start the command
Dhruv_Varun 0:7e4786a3584b 155 i2c->start();
Dhruv_Varun 0:7e4786a3584b 156
Dhruv_Varun 0:7e4786a3584b 157 // Address the target (Write mode)
Dhruv_Varun 0:7e4786a3584b 158 int ack1= i2c->write(address);
Dhruv_Varun 0:7e4786a3584b 159
Dhruv_Varun 0:7e4786a3584b 160 // Set the register key to write
Dhruv_Varun 0:7e4786a3584b 161 int ack2 = i2c->write(key);
Dhruv_Varun 0:7e4786a3584b 162
Dhruv_Varun 0:7e4786a3584b 163 // Read in the result
Dhruv_Varun 0:7e4786a3584b 164 int ack3 = i2c->write(value);
Dhruv_Varun 0:7e4786a3584b 165
Dhruv_Varun 0:7e4786a3584b 166 // Reset the bus
Dhruv_Varun 0:7e4786a3584b 167 i2c->stop();
Dhruv_Varun 0:7e4786a3584b 168
Dhruv_Varun 0:7e4786a3584b 169 return (ack1+ack2+ack3)-3;
Dhruv_Varun 0:7e4786a3584b 170 }
Dhruv_Varun 0:7e4786a3584b 171
Dhruv_Varun 0:7e4786a3584b 172
Dhruv_Varun 0:7e4786a3584b 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
Dhruv_Varun 0:7e4786a3584b 174 //Start the command
Dhruv_Varun 0:7e4786a3584b 175 i2c->start();
Dhruv_Varun 0:7e4786a3584b 176
Dhruv_Varun 0:7e4786a3584b 177 // Address the target (Write mode)
Dhruv_Varun 0:7e4786a3584b 178 int ack= i2c->write(address);
Dhruv_Varun 0:7e4786a3584b 179 if(ack!=1){
Dhruv_Varun 0:7e4786a3584b 180 return -1;
Dhruv_Varun 0:7e4786a3584b 181 }
Dhruv_Varun 0:7e4786a3584b 182
Dhruv_Varun 0:7e4786a3584b 183 // Set the register key to write
Dhruv_Varun 0:7e4786a3584b 184 ack = i2c->write(start);
Dhruv_Varun 0:7e4786a3584b 185 if(ack!=1){
Dhruv_Varun 0:7e4786a3584b 186 return -1;
Dhruv_Varun 0:7e4786a3584b 187 }
Dhruv_Varun 0:7e4786a3584b 188
Dhruv_Varun 0:7e4786a3584b 189 // Write the date set
Dhruv_Varun 0:7e4786a3584b 190 int count = 0;
Dhruv_Varun 0:7e4786a3584b 191 while(ack==1 && (count < length)){
Dhruv_Varun 0:7e4786a3584b 192 ack = i2c->write(dataSet[count]);
Dhruv_Varun 0:7e4786a3584b 193 count++;
Dhruv_Varun 0:7e4786a3584b 194 }
Dhruv_Varun 0:7e4786a3584b 195 // Stop the cmd
Dhruv_Varun 0:7e4786a3584b 196 i2c->stop();
Dhruv_Varun 0:7e4786a3584b 197
Dhruv_Varun 0:7e4786a3584b 198 return count;
Dhruv_Varun 0:7e4786a3584b 199 }
Dhruv_Varun 0:7e4786a3584b 200
Dhruv_Varun 0:7e4786a3584b 201
Dhruv_Varun 0:7e4786a3584b 202 bool Mpr121::getProximityMode(){
Dhruv_Varun 0:7e4786a3584b 203 if(this->read(ELE_CFG) > 0x0c)
Dhruv_Varun 0:7e4786a3584b 204 return true;
Dhruv_Varun 0:7e4786a3584b 205 else
Dhruv_Varun 0:7e4786a3584b 206 return false;
Dhruv_Varun 0:7e4786a3584b 207 }
Dhruv_Varun 0:7e4786a3584b 208
Dhruv_Varun 0:7e4786a3584b 209 void Mpr121::setProximityMode(bool mode){
Dhruv_Varun 0:7e4786a3584b 210 this->write(ELE_CFG,0x00);
Dhruv_Varun 0:7e4786a3584b 211 if(mode){
Dhruv_Varun 0:7e4786a3584b 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
Dhruv_Varun 0:7e4786a3584b 213 } else {
Dhruv_Varun 0:7e4786a3584b 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
Dhruv_Varun 0:7e4786a3584b 215 }
Dhruv_Varun 0:7e4786a3584b 216 }
Dhruv_Varun 0:7e4786a3584b 217
Dhruv_Varun 0:7e4786a3584b 218
Dhruv_Varun 0:7e4786a3584b 219 int Mpr121::readTouchData(){
Dhruv_Varun 0:7e4786a3584b 220 return this->read(0x00);
Dhruv_Varun 0:7e4786a3584b 221 }