Ernest Williams / Mbed 2 deprecated Bluetooth

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Dependencies:   mbed Motor Servo

Fork of SerialPassthrough_LPC1768 by jim hamblen

mpr121.cpp@9:c216d7b63f92, 2016-04-30 (annotated)

Committer:
ewilliams61
Date:
Sat Apr 30 19:47:54 2016 +0000
Revision:
9:c216d7b63f92
Parent:
7:79d0b30fedb4 
Final working code for IOT mailbox

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ewilliams61 7:79d0b30fedb4 1 /*
ewilliams61 7:79d0b30fedb4 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
ewilliams61 7:79d0b30fedb4 3
ewilliams61 7:79d0b30fedb4 4 Permission is hereby granted, free of charge, to any person obtaining a copy
ewilliams61 7:79d0b30fedb4 5 of this software and associated documentation files (the "Software"), to deal
ewilliams61 7:79d0b30fedb4 6 in the Software without restriction, including without limitation the rights
ewilliams61 7:79d0b30fedb4 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ewilliams61 7:79d0b30fedb4 8 copies of the Software, and to permit persons to whom the Software is
ewilliams61 7:79d0b30fedb4 9 furnished to do so, subject to the following conditions:
ewilliams61 7:79d0b30fedb4 10
ewilliams61 7:79d0b30fedb4 11 The above copyright notice and this permission notice shall be included in
ewilliams61 7:79d0b30fedb4 12 all copies or substantial portions of the Software.
ewilliams61 7:79d0b30fedb4 13
ewilliams61 7:79d0b30fedb4 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ewilliams61 7:79d0b30fedb4 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ewilliams61 7:79d0b30fedb4 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ewilliams61 7:79d0b30fedb4 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ewilliams61 7:79d0b30fedb4 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ewilliams61 7:79d0b30fedb4 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ewilliams61 7:79d0b30fedb4 20 THE SOFTWARE.
ewilliams61 7:79d0b30fedb4 21 */
ewilliams61 7:79d0b30fedb4 22
ewilliams61 7:79d0b30fedb4 23 #include <mbed.h>
ewilliams61 7:79d0b30fedb4 24 #include <sstream>
ewilliams61 7:79d0b30fedb4 25 #include <string>
ewilliams61 7:79d0b30fedb4 26 #include <list>
ewilliams61 7:79d0b30fedb4 27
ewilliams61 7:79d0b30fedb4 28 #include <mpr121.h>
ewilliams61 7:79d0b30fedb4 29
ewilliams61 7:79d0b30fedb4 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
ewilliams61 7:79d0b30fedb4 31 {
ewilliams61 7:79d0b30fedb4 32 this->i2c = i2c;
ewilliams61 7:79d0b30fedb4 33
ewilliams61 7:79d0b30fedb4 34 address = i2cAddress;
ewilliams61 7:79d0b30fedb4 35
ewilliams61 7:79d0b30fedb4 36 // Configure the MPR121 settings to default
ewilliams61 7:79d0b30fedb4 37 this->configureSettings();
ewilliams61 7:79d0b30fedb4 38 }
ewilliams61 7:79d0b30fedb4 39
ewilliams61 7:79d0b30fedb4 40
ewilliams61 7:79d0b30fedb4 41 void Mpr121::configureSettings()
ewilliams61 7:79d0b30fedb4 42 {
ewilliams61 7:79d0b30fedb4 43 // Put the MPR into setup mode
ewilliams61 7:79d0b30fedb4 44 this->write(ELE_CFG,0x00);
ewilliams61 7:79d0b30fedb4 45
ewilliams61 7:79d0b30fedb4 46 // Electrode filters for when data is > baseline
ewilliams61 7:79d0b30fedb4 47 unsigned char gtBaseline[] = {
ewilliams61 7:79d0b30fedb4 48 0x01, //MHD_R
ewilliams61 7:79d0b30fedb4 49 0x01, //NHD_R
ewilliams61 7:79d0b30fedb4 50 0x00, //NCL_R
ewilliams61 7:79d0b30fedb4 51 0x00 //FDL_R
ewilliams61 7:79d0b30fedb4 52 };
ewilliams61 7:79d0b30fedb4 53
ewilliams61 7:79d0b30fedb4 54 writeMany(MHD_R,gtBaseline,4);
ewilliams61 7:79d0b30fedb4 55
ewilliams61 7:79d0b30fedb4 56 // Electrode filters for when data is < baseline
ewilliams61 7:79d0b30fedb4 57 unsigned char ltBaseline[] = {
ewilliams61 7:79d0b30fedb4 58 0x01, //MHD_F
ewilliams61 7:79d0b30fedb4 59 0x01, //NHD_F
ewilliams61 7:79d0b30fedb4 60 0xFF, //NCL_F
ewilliams61 7:79d0b30fedb4 61 0x02 //FDL_F
ewilliams61 7:79d0b30fedb4 62 };
ewilliams61 7:79d0b30fedb4 63
ewilliams61 7:79d0b30fedb4 64 writeMany(MHD_F,ltBaseline,4);
ewilliams61 7:79d0b30fedb4 65
ewilliams61 7:79d0b30fedb4 66 // Electrode touch and release thresholds
ewilliams61 7:79d0b30fedb4 67 unsigned char electrodeThresholds[] = {
ewilliams61 7:79d0b30fedb4 68 E_THR_T, // Touch Threshhold
ewilliams61 7:79d0b30fedb4 69 E_THR_R // Release Threshold
ewilliams61 7:79d0b30fedb4 70 };
ewilliams61 7:79d0b30fedb4 71
ewilliams61 7:79d0b30fedb4 72 for(int i=0; i<12; i++){
ewilliams61 7:79d0b30fedb4 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
ewilliams61 7:79d0b30fedb4 74 }
ewilliams61 7:79d0b30fedb4 75
ewilliams61 7:79d0b30fedb4 76 // Proximity Settings
ewilliams61 7:79d0b30fedb4 77 unsigned char proximitySettings[] = {
ewilliams61 7:79d0b30fedb4 78 0xff, //MHD_Prox_R
ewilliams61 7:79d0b30fedb4 79 0xff, //NHD_Prox_R
ewilliams61 7:79d0b30fedb4 80 0x00, //NCL_Prox_R
ewilliams61 7:79d0b30fedb4 81 0x00, //FDL_Prox_R
ewilliams61 7:79d0b30fedb4 82 0x01, //MHD_Prox_F
ewilliams61 7:79d0b30fedb4 83 0x01, //NHD_Prox_F
ewilliams61 7:79d0b30fedb4 84 0xFF, //NCL_Prox_F
ewilliams61 7:79d0b30fedb4 85 0xff, //FDL_Prox_F
ewilliams61 7:79d0b30fedb4 86 0x00, //NHD_Prox_T
ewilliams61 7:79d0b30fedb4 87 0x00, //NCL_Prox_T
ewilliams61 7:79d0b30fedb4 88 0x00 //NFD_Prox_T
ewilliams61 7:79d0b30fedb4 89 };
ewilliams61 7:79d0b30fedb4 90 writeMany(MHDPROXR,proximitySettings,11);
ewilliams61 7:79d0b30fedb4 91
ewilliams61 7:79d0b30fedb4 92 unsigned char proxThresh[] = {
ewilliams61 7:79d0b30fedb4 93 PROX_THR_T, // Touch Threshold
ewilliams61 7:79d0b30fedb4 94 PROX_THR_R // Release Threshold
ewilliams61 7:79d0b30fedb4 95 };
ewilliams61 7:79d0b30fedb4 96 writeMany(EPROXTTH,proxThresh,2);
ewilliams61 7:79d0b30fedb4 97
ewilliams61 7:79d0b30fedb4 98 this->write(FIL_CFG,0x04);
ewilliams61 7:79d0b30fedb4 99
ewilliams61 7:79d0b30fedb4 100 // Set the electrode config to transition to active mode
ewilliams61 7:79d0b30fedb4 101 this->write(ELE_CFG,0x0c);
ewilliams61 7:79d0b30fedb4 102 }
ewilliams61 7:79d0b30fedb4 103
ewilliams61 7:79d0b30fedb4 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
ewilliams61 7:79d0b30fedb4 105
ewilliams61 7:79d0b30fedb4 106 if(electrode > 11) return;
ewilliams61 7:79d0b30fedb4 107
ewilliams61 7:79d0b30fedb4 108 // Get the current mode
ewilliams61 7:79d0b30fedb4 109 unsigned char mode = this->read(ELE_CFG);
ewilliams61 7:79d0b30fedb4 110
ewilliams61 7:79d0b30fedb4 111 // Put the MPR into setup mode
ewilliams61 7:79d0b30fedb4 112 this->write(ELE_CFG,0x00);
ewilliams61 7:79d0b30fedb4 113
ewilliams61 7:79d0b30fedb4 114 // Write the new threshold
ewilliams61 7:79d0b30fedb4 115 this->write((ELE0_T+(electrode*2)), touch);
ewilliams61 7:79d0b30fedb4 116 this->write((ELE0_T+(electrode*2)+1), release);
ewilliams61 7:79d0b30fedb4 117
ewilliams61 7:79d0b30fedb4 118 //Restore the operating mode
ewilliams61 7:79d0b30fedb4 119 this->write(ELE_CFG, mode);
ewilliams61 7:79d0b30fedb4 120 }
ewilliams61 7:79d0b30fedb4 121
ewilliams61 7:79d0b30fedb4 122
ewilliams61 7:79d0b30fedb4 123 unsigned char Mpr121::read(int key){
ewilliams61 7:79d0b30fedb4 124
ewilliams61 7:79d0b30fedb4 125 unsigned char data[2];
ewilliams61 7:79d0b30fedb4 126
ewilliams61 7:79d0b30fedb4 127 //Start the command
ewilliams61 7:79d0b30fedb4 128 i2c->start();
ewilliams61 7:79d0b30fedb4 129
ewilliams61 7:79d0b30fedb4 130 // Address the target (Write mode)
ewilliams61 7:79d0b30fedb4 131 int ack1= i2c->write(address);
ewilliams61 7:79d0b30fedb4 132
ewilliams61 7:79d0b30fedb4 133 // Set the register key to read
ewilliams61 7:79d0b30fedb4 134 int ack2 = i2c->write(key);
ewilliams61 7:79d0b30fedb4 135
ewilliams61 7:79d0b30fedb4 136 // Re-start for read of data
ewilliams61 7:79d0b30fedb4 137 i2c->start();
ewilliams61 7:79d0b30fedb4 138
ewilliams61 7:79d0b30fedb4 139 // Re-send the target address in read mode
ewilliams61 7:79d0b30fedb4 140 int ack3 = i2c->write(address+1);
ewilliams61 7:79d0b30fedb4 141
ewilliams61 7:79d0b30fedb4 142 // Read in the result
ewilliams61 7:79d0b30fedb4 143 data[0] = i2c->read(0);
ewilliams61 7:79d0b30fedb4 144
ewilliams61 7:79d0b30fedb4 145 // Reset the bus
ewilliams61 7:79d0b30fedb4 146 i2c->stop();
ewilliams61 7:79d0b30fedb4 147
ewilliams61 7:79d0b30fedb4 148 return data[0];
ewilliams61 7:79d0b30fedb4 149 }
ewilliams61 7:79d0b30fedb4 150
ewilliams61 7:79d0b30fedb4 151
ewilliams61 7:79d0b30fedb4 152 int Mpr121::write(int key, unsigned char value){
ewilliams61 7:79d0b30fedb4 153
ewilliams61 7:79d0b30fedb4 154 //Start the command
ewilliams61 7:79d0b30fedb4 155 i2c->start();
ewilliams61 7:79d0b30fedb4 156
ewilliams61 7:79d0b30fedb4 157 // Address the target (Write mode)
ewilliams61 7:79d0b30fedb4 158 int ack1= i2c->write(address);
ewilliams61 7:79d0b30fedb4 159
ewilliams61 7:79d0b30fedb4 160 // Set the register key to write
ewilliams61 7:79d0b30fedb4 161 int ack2 = i2c->write(key);
ewilliams61 7:79d0b30fedb4 162
ewilliams61 7:79d0b30fedb4 163 // Read in the result
ewilliams61 7:79d0b30fedb4 164 int ack3 = i2c->write(value);
ewilliams61 7:79d0b30fedb4 165
ewilliams61 7:79d0b30fedb4 166 // Reset the bus
ewilliams61 7:79d0b30fedb4 167 i2c->stop();
ewilliams61 7:79d0b30fedb4 168
ewilliams61 7:79d0b30fedb4 169 return (ack1+ack2+ack3)-3;
ewilliams61 7:79d0b30fedb4 170 }
ewilliams61 7:79d0b30fedb4 171
ewilliams61 7:79d0b30fedb4 172
ewilliams61 7:79d0b30fedb4 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
ewilliams61 7:79d0b30fedb4 174 //Start the command
ewilliams61 7:79d0b30fedb4 175 i2c->start();
ewilliams61 7:79d0b30fedb4 176
ewilliams61 7:79d0b30fedb4 177 // Address the target (Write mode)
ewilliams61 7:79d0b30fedb4 178 int ack= i2c->write(address);
ewilliams61 7:79d0b30fedb4 179 if(ack!=1){
ewilliams61 7:79d0b30fedb4 180 return -1;
ewilliams61 7:79d0b30fedb4 181 }
ewilliams61 7:79d0b30fedb4 182
ewilliams61 7:79d0b30fedb4 183 // Set the register key to write
ewilliams61 7:79d0b30fedb4 184 ack = i2c->write(start);
ewilliams61 7:79d0b30fedb4 185 if(ack!=1){
ewilliams61 7:79d0b30fedb4 186 return -1;
ewilliams61 7:79d0b30fedb4 187 }
ewilliams61 7:79d0b30fedb4 188
ewilliams61 7:79d0b30fedb4 189 // Write the date set
ewilliams61 7:79d0b30fedb4 190 int count = 0;
ewilliams61 7:79d0b30fedb4 191 while(ack==1 && (count < length)){
ewilliams61 7:79d0b30fedb4 192 ack = i2c->write(dataSet[count]);
ewilliams61 7:79d0b30fedb4 193 count++;
ewilliams61 7:79d0b30fedb4 194 }
ewilliams61 7:79d0b30fedb4 195 // Stop the cmd
ewilliams61 7:79d0b30fedb4 196 i2c->stop();
ewilliams61 7:79d0b30fedb4 197
ewilliams61 7:79d0b30fedb4 198 return count;
ewilliams61 7:79d0b30fedb4 199 }
ewilliams61 7:79d0b30fedb4 200
ewilliams61 7:79d0b30fedb4 201
ewilliams61 7:79d0b30fedb4 202 bool Mpr121::getProximityMode(){
ewilliams61 7:79d0b30fedb4 203 if(this->read(ELE_CFG) > 0x0c)
ewilliams61 7:79d0b30fedb4 204 return true;
ewilliams61 7:79d0b30fedb4 205 else
ewilliams61 7:79d0b30fedb4 206 return false;
ewilliams61 7:79d0b30fedb4 207 }
ewilliams61 7:79d0b30fedb4 208
ewilliams61 7:79d0b30fedb4 209 void Mpr121::setProximityMode(bool mode){
ewilliams61 7:79d0b30fedb4 210 this->write(ELE_CFG,0x00);
ewilliams61 7:79d0b30fedb4 211 if(mode){
ewilliams61 7:79d0b30fedb4 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
ewilliams61 7:79d0b30fedb4 213 } else {
ewilliams61 7:79d0b30fedb4 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
ewilliams61 7:79d0b30fedb4 215 }
ewilliams61 7:79d0b30fedb4 216 }
ewilliams61 7:79d0b30fedb4 217
ewilliams61 7:79d0b30fedb4 218
ewilliams61 7:79d0b30fedb4 219 int Mpr121::readTouchData(){
ewilliams61 7:79d0b30fedb4 220 return this->read(0x00);
ewilliams61 7:79d0b30fedb4 221 }