Twanika Douglas / Mbed 2 deprecated Security_Proof

A security system that detects the movement of an object in a box using IR distance sensors

Dependencies:   4DGL-uLCD-SE Camera_LS_Y201 SDFileSystem mbed wave_player

mpr121.cpp@1:44af7a01e1e0, 2014-12-09 (annotated)

Committer:
tdouglas6
Date:
Tue Dec 09 14:53:24 2014 +0000
Revision:
1:44af7a01e1e0
Parent:
0:a729b4a52c27 
Security system that detects the movement of an object in a box.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tdouglas6 0:a729b4a52c27 1 /*
tdouglas6 0:a729b4a52c27 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
tdouglas6 0:a729b4a52c27 3
tdouglas6 0:a729b4a52c27 4 Permission is hereby granted, free of charge, to any person obtaining a copy
tdouglas6 0:a729b4a52c27 5 of this software and associated documentation files (the "Software"), to deal
tdouglas6 0:a729b4a52c27 6 in the Software without restriction, including without limitation the rights
tdouglas6 0:a729b4a52c27 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
tdouglas6 0:a729b4a52c27 8 copies of the Software, and to permit persons to whom the Software is
tdouglas6 0:a729b4a52c27 9 furnished to do so, subject to the following conditions:
tdouglas6 0:a729b4a52c27 10
tdouglas6 0:a729b4a52c27 11 The above copyright notice and this permission notice shall be included in
tdouglas6 0:a729b4a52c27 12 all copies or substantial portions of the Software.
tdouglas6 0:a729b4a52c27 13
tdouglas6 0:a729b4a52c27 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
tdouglas6 0:a729b4a52c27 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
tdouglas6 0:a729b4a52c27 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
tdouglas6 0:a729b4a52c27 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
tdouglas6 0:a729b4a52c27 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
tdouglas6 0:a729b4a52c27 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
tdouglas6 0:a729b4a52c27 20 THE SOFTWARE.
tdouglas6 0:a729b4a52c27 21 */
tdouglas6 0:a729b4a52c27 22
tdouglas6 0:a729b4a52c27 23 #include <mbed.h>
tdouglas6 0:a729b4a52c27 24 #include <sstream>
tdouglas6 0:a729b4a52c27 25 #include <string>
tdouglas6 0:a729b4a52c27 26 #include <list>
tdouglas6 0:a729b4a52c27 27
tdouglas6 0:a729b4a52c27 28 #include <mpr121.h>
tdouglas6 0:a729b4a52c27 29
tdouglas6 0:a729b4a52c27 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
tdouglas6 0:a729b4a52c27 31 {
tdouglas6 0:a729b4a52c27 32 this->i2c = i2c;
tdouglas6 0:a729b4a52c27 33
tdouglas6 0:a729b4a52c27 34 address = i2cAddress;
tdouglas6 0:a729b4a52c27 35
tdouglas6 0:a729b4a52c27 36 // Configure the MPR121 settings to default
tdouglas6 0:a729b4a52c27 37 this->configureSettings();
tdouglas6 0:a729b4a52c27 38 }
tdouglas6 0:a729b4a52c27 39
tdouglas6 0:a729b4a52c27 40
tdouglas6 0:a729b4a52c27 41 void Mpr121::configureSettings()
tdouglas6 0:a729b4a52c27 42 {
tdouglas6 0:a729b4a52c27 43 // Put the MPR into setup mode
tdouglas6 0:a729b4a52c27 44 this->write(ELE_CFG,0x00);
tdouglas6 0:a729b4a52c27 45
tdouglas6 0:a729b4a52c27 46 // Electrode filters for when data is > baseline
tdouglas6 0:a729b4a52c27 47 unsigned char gtBaseline[] = {
tdouglas6 0:a729b4a52c27 48 0x01, //MHD_R
tdouglas6 0:a729b4a52c27 49 0x01, //NHD_R
tdouglas6 0:a729b4a52c27 50 0x00, //NCL_R
tdouglas6 0:a729b4a52c27 51 0x00 //FDL_R
tdouglas6 0:a729b4a52c27 52 };
tdouglas6 0:a729b4a52c27 53
tdouglas6 0:a729b4a52c27 54 writeMany(MHD_R,gtBaseline,4);
tdouglas6 0:a729b4a52c27 55
tdouglas6 0:a729b4a52c27 56 // Electrode filters for when data is < baseline
tdouglas6 0:a729b4a52c27 57 unsigned char ltBaseline[] = {
tdouglas6 0:a729b4a52c27 58 0x01, //MHD_F
tdouglas6 0:a729b4a52c27 59 0x01, //NHD_F
tdouglas6 0:a729b4a52c27 60 0xFF, //NCL_F
tdouglas6 0:a729b4a52c27 61 0x02 //FDL_F
tdouglas6 0:a729b4a52c27 62 };
tdouglas6 0:a729b4a52c27 63
tdouglas6 0:a729b4a52c27 64 writeMany(MHD_F,ltBaseline,4);
tdouglas6 0:a729b4a52c27 65
tdouglas6 0:a729b4a52c27 66 // Electrode touch and release thresholds
tdouglas6 0:a729b4a52c27 67 unsigned char electrodeThresholds[] = {
tdouglas6 0:a729b4a52c27 68 E_THR_T, // Touch Threshhold
tdouglas6 0:a729b4a52c27 69 E_THR_R // Release Threshold
tdouglas6 0:a729b4a52c27 70 };
tdouglas6 0:a729b4a52c27 71
tdouglas6 0:a729b4a52c27 72 for(int i=0; i<12; i++){
tdouglas6 0:a729b4a52c27 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
tdouglas6 0:a729b4a52c27 74 }
tdouglas6 0:a729b4a52c27 75
tdouglas6 0:a729b4a52c27 76 // Proximity Settings
tdouglas6 0:a729b4a52c27 77 unsigned char proximitySettings[] = {
tdouglas6 0:a729b4a52c27 78 0xff, //MHD_Prox_R
tdouglas6 0:a729b4a52c27 79 0xff, //NHD_Prox_R
tdouglas6 0:a729b4a52c27 80 0x00, //NCL_Prox_R
tdouglas6 0:a729b4a52c27 81 0x00, //FDL_Prox_R
tdouglas6 0:a729b4a52c27 82 0x01, //MHD_Prox_F
tdouglas6 0:a729b4a52c27 83 0x01, //NHD_Prox_F
tdouglas6 0:a729b4a52c27 84 0xFF, //NCL_Prox_F
tdouglas6 0:a729b4a52c27 85 0xff, //FDL_Prox_F
tdouglas6 0:a729b4a52c27 86 0x00, //NHD_Prox_T
tdouglas6 0:a729b4a52c27 87 0x00, //NCL_Prox_T
tdouglas6 0:a729b4a52c27 88 0x00 //NFD_Prox_T
tdouglas6 0:a729b4a52c27 89 };
tdouglas6 0:a729b4a52c27 90 writeMany(MHDPROXR,proximitySettings,11);
tdouglas6 0:a729b4a52c27 91
tdouglas6 0:a729b4a52c27 92 unsigned char proxThresh[] = {
tdouglas6 0:a729b4a52c27 93 PROX_THR_T, // Touch Threshold
tdouglas6 0:a729b4a52c27 94 PROX_THR_R // Release Threshold
tdouglas6 0:a729b4a52c27 95 };
tdouglas6 0:a729b4a52c27 96 writeMany(EPROXTTH,proxThresh,2);
tdouglas6 0:a729b4a52c27 97
tdouglas6 0:a729b4a52c27 98 this->write(FIL_CFG,0x04);
tdouglas6 0:a729b4a52c27 99
tdouglas6 0:a729b4a52c27 100 // Set the electrode config to transition to active mode
tdouglas6 0:a729b4a52c27 101 this->write(ELE_CFG,0x0c);
tdouglas6 0:a729b4a52c27 102 }
tdouglas6 0:a729b4a52c27 103
tdouglas6 0:a729b4a52c27 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
tdouglas6 0:a729b4a52c27 105
tdouglas6 0:a729b4a52c27 106 if(electrode > 11) return;
tdouglas6 0:a729b4a52c27 107
tdouglas6 0:a729b4a52c27 108 // Get the current mode
tdouglas6 0:a729b4a52c27 109 unsigned char mode = this->read(ELE_CFG);
tdouglas6 0:a729b4a52c27 110
tdouglas6 0:a729b4a52c27 111 // Put the MPR into setup mode
tdouglas6 0:a729b4a52c27 112 this->write(ELE_CFG,0x00);
tdouglas6 0:a729b4a52c27 113
tdouglas6 0:a729b4a52c27 114 // Write the new threshold
tdouglas6 0:a729b4a52c27 115 this->write((ELE0_T+(electrode*2)), touch);
tdouglas6 0:a729b4a52c27 116 this->write((ELE0_T+(electrode*2)+1), release);
tdouglas6 0:a729b4a52c27 117
tdouglas6 0:a729b4a52c27 118 //Restore the operating mode
tdouglas6 0:a729b4a52c27 119 this->write(ELE_CFG, mode);
tdouglas6 0:a729b4a52c27 120 }
tdouglas6 0:a729b4a52c27 121
tdouglas6 0:a729b4a52c27 122
tdouglas6 0:a729b4a52c27 123 unsigned char Mpr121::read(int key){
tdouglas6 0:a729b4a52c27 124
tdouglas6 0:a729b4a52c27 125 unsigned char data[2];
tdouglas6 0:a729b4a52c27 126
tdouglas6 0:a729b4a52c27 127 //Start the command
tdouglas6 0:a729b4a52c27 128 i2c->start();
tdouglas6 0:a729b4a52c27 129
tdouglas6 0:a729b4a52c27 130 // Address the target (Write mode)
tdouglas6 0:a729b4a52c27 131 int ack1= i2c->write(address);
tdouglas6 0:a729b4a52c27 132
tdouglas6 0:a729b4a52c27 133 // Set the register key to read
tdouglas6 0:a729b4a52c27 134 int ack2 = i2c->write(key);
tdouglas6 0:a729b4a52c27 135
tdouglas6 0:a729b4a52c27 136 // Re-start for read of data
tdouglas6 0:a729b4a52c27 137 i2c->start();
tdouglas6 0:a729b4a52c27 138
tdouglas6 0:a729b4a52c27 139 // Re-send the target address in read mode
tdouglas6 0:a729b4a52c27 140 int ack3 = i2c->write(address+1);
tdouglas6 0:a729b4a52c27 141
tdouglas6 0:a729b4a52c27 142 // Read in the result
tdouglas6 0:a729b4a52c27 143 data[0] = i2c->read(0);
tdouglas6 0:a729b4a52c27 144
tdouglas6 0:a729b4a52c27 145 // Reset the bus
tdouglas6 0:a729b4a52c27 146 i2c->stop();
tdouglas6 0:a729b4a52c27 147
tdouglas6 0:a729b4a52c27 148 return data[0];
tdouglas6 0:a729b4a52c27 149 }
tdouglas6 0:a729b4a52c27 150
tdouglas6 0:a729b4a52c27 151
tdouglas6 0:a729b4a52c27 152 int Mpr121::write(int key, unsigned char value){
tdouglas6 0:a729b4a52c27 153
tdouglas6 0:a729b4a52c27 154 //Start the command
tdouglas6 0:a729b4a52c27 155 i2c->start();
tdouglas6 0:a729b4a52c27 156
tdouglas6 0:a729b4a52c27 157 // Address the target (Write mode)
tdouglas6 0:a729b4a52c27 158 int ack1= i2c->write(address);
tdouglas6 0:a729b4a52c27 159
tdouglas6 0:a729b4a52c27 160 // Set the register key to write
tdouglas6 0:a729b4a52c27 161 int ack2 = i2c->write(key);
tdouglas6 0:a729b4a52c27 162
tdouglas6 0:a729b4a52c27 163 // Read in the result
tdouglas6 0:a729b4a52c27 164 int ack3 = i2c->write(value);
tdouglas6 0:a729b4a52c27 165
tdouglas6 0:a729b4a52c27 166 // Reset the bus
tdouglas6 0:a729b4a52c27 167 i2c->stop();
tdouglas6 0:a729b4a52c27 168
tdouglas6 0:a729b4a52c27 169 return (ack1+ack2+ack3)-3;
tdouglas6 0:a729b4a52c27 170 }
tdouglas6 0:a729b4a52c27 171
tdouglas6 0:a729b4a52c27 172
tdouglas6 0:a729b4a52c27 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
tdouglas6 0:a729b4a52c27 174 //Start the command
tdouglas6 0:a729b4a52c27 175 i2c->start();
tdouglas6 0:a729b4a52c27 176
tdouglas6 0:a729b4a52c27 177 // Address the target (Write mode)
tdouglas6 0:a729b4a52c27 178 int ack= i2c->write(address);
tdouglas6 0:a729b4a52c27 179 if(ack!=1){
tdouglas6 0:a729b4a52c27 180 return -1;
tdouglas6 0:a729b4a52c27 181 }
tdouglas6 0:a729b4a52c27 182
tdouglas6 0:a729b4a52c27 183 // Set the register key to write
tdouglas6 0:a729b4a52c27 184 ack = i2c->write(start);
tdouglas6 0:a729b4a52c27 185 if(ack!=1){
tdouglas6 0:a729b4a52c27 186 return -1;
tdouglas6 0:a729b4a52c27 187 }
tdouglas6 0:a729b4a52c27 188
tdouglas6 0:a729b4a52c27 189 // Write the date set
tdouglas6 0:a729b4a52c27 190 int count = 0;
tdouglas6 0:a729b4a52c27 191 while(ack==1 && (count < length)){
tdouglas6 0:a729b4a52c27 192 ack = i2c->write(dataSet[count]);
tdouglas6 0:a729b4a52c27 193 count++;
tdouglas6 0:a729b4a52c27 194 }
tdouglas6 0:a729b4a52c27 195 // Stop the cmd
tdouglas6 0:a729b4a52c27 196 i2c->stop();
tdouglas6 0:a729b4a52c27 197
tdouglas6 0:a729b4a52c27 198 return count;
tdouglas6 0:a729b4a52c27 199 }
tdouglas6 0:a729b4a52c27 200
tdouglas6 0:a729b4a52c27 201
tdouglas6 0:a729b4a52c27 202 bool Mpr121::getProximityMode(){
tdouglas6 0:a729b4a52c27 203 if(this->read(ELE_CFG) > 0x0c)
tdouglas6 0:a729b4a52c27 204 return true;
tdouglas6 0:a729b4a52c27 205 else
tdouglas6 0:a729b4a52c27 206 return false;
tdouglas6 0:a729b4a52c27 207 }
tdouglas6 0:a729b4a52c27 208
tdouglas6 0:a729b4a52c27 209 void Mpr121::setProximityMode(bool mode){
tdouglas6 0:a729b4a52c27 210 this->write(ELE_CFG,0x00);
tdouglas6 0:a729b4a52c27 211 if(mode){
tdouglas6 0:a729b4a52c27 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
tdouglas6 0:a729b4a52c27 213 } else {
tdouglas6 0:a729b4a52c27 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
tdouglas6 0:a729b4a52c27 215 }
tdouglas6 0:a729b4a52c27 216 }
tdouglas6 0:a729b4a52c27 217
tdouglas6 0:a729b4a52c27 218
tdouglas6 0:a729b4a52c27 219 int Mpr121::readTouchData(){
tdouglas6 0:a729b4a52c27 220 return this->read(0x00);
tdouglas6 0:a729b4a52c27 221 }