Eric Beauchemin / Mbed 2 deprecated Printer

commit

Dependencies:   PID SDFileSystem Stepper_Motor_X27168 mbed-rtos mbed millis

mpr121.cpp@1:d6183c8b01de, 2016-04-29 (annotated)

Committer:
ebeauchemin3
Date:
Fri Apr 29 15:00:18 2016 +0000
Revision:
1:d6183c8b01de
Parent:
0:3a7cef09ad54 
commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ebeauchemin3 0:3a7cef09ad54 1 /*
ebeauchemin3 0:3a7cef09ad54 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
ebeauchemin3 0:3a7cef09ad54 3
ebeauchemin3 0:3a7cef09ad54 4 Permission is hereby granted, free of charge, to any person obtaining a copy
ebeauchemin3 0:3a7cef09ad54 5 of this software and associated documentation files (the "Software"), to deal
ebeauchemin3 0:3a7cef09ad54 6 in the Software without restriction, including without limitation the rights
ebeauchemin3 0:3a7cef09ad54 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ebeauchemin3 0:3a7cef09ad54 8 copies of the Software, and to permit persons to whom the Software is
ebeauchemin3 0:3a7cef09ad54 9 furnished to do so, subject to the following conditions:
ebeauchemin3 0:3a7cef09ad54 10
ebeauchemin3 0:3a7cef09ad54 11 The above copyright notice and this permission notice shall be included in
ebeauchemin3 0:3a7cef09ad54 12 all copies or substantial portions of the Software.
ebeauchemin3 0:3a7cef09ad54 13
ebeauchemin3 0:3a7cef09ad54 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ebeauchemin3 0:3a7cef09ad54 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ebeauchemin3 0:3a7cef09ad54 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ebeauchemin3 0:3a7cef09ad54 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ebeauchemin3 0:3a7cef09ad54 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ebeauchemin3 0:3a7cef09ad54 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ebeauchemin3 0:3a7cef09ad54 20 THE SOFTWARE.
ebeauchemin3 0:3a7cef09ad54 21 */
ebeauchemin3 0:3a7cef09ad54 22
ebeauchemin3 0:3a7cef09ad54 23 #include <mbed.h>
ebeauchemin3 0:3a7cef09ad54 24 #include <sstream>
ebeauchemin3 0:3a7cef09ad54 25 #include <string>
ebeauchemin3 0:3a7cef09ad54 26 #include <list>
ebeauchemin3 0:3a7cef09ad54 27
ebeauchemin3 0:3a7cef09ad54 28 #include <mpr121.h>
ebeauchemin3 0:3a7cef09ad54 29
ebeauchemin3 0:3a7cef09ad54 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
ebeauchemin3 0:3a7cef09ad54 31 {
ebeauchemin3 0:3a7cef09ad54 32 this->i2c = i2c;
ebeauchemin3 0:3a7cef09ad54 33
ebeauchemin3 0:3a7cef09ad54 34 address = i2cAddress;
ebeauchemin3 0:3a7cef09ad54 35
ebeauchemin3 0:3a7cef09ad54 36 // Configure the MPR121 settings to default
ebeauchemin3 0:3a7cef09ad54 37 this->configureSettings();
ebeauchemin3 0:3a7cef09ad54 38 }
ebeauchemin3 0:3a7cef09ad54 39
ebeauchemin3 0:3a7cef09ad54 40
ebeauchemin3 0:3a7cef09ad54 41 void Mpr121::configureSettings()
ebeauchemin3 0:3a7cef09ad54 42 {
ebeauchemin3 0:3a7cef09ad54 43 // Put the MPR into setup mode
ebeauchemin3 0:3a7cef09ad54 44 this->write(ELE_CFG,0x00);
ebeauchemin3 0:3a7cef09ad54 45
ebeauchemin3 0:3a7cef09ad54 46 // Electrode filters for when data is > baseline
ebeauchemin3 0:3a7cef09ad54 47 unsigned char gtBaseline[] = {
ebeauchemin3 0:3a7cef09ad54 48 0x01, //MHD_R
ebeauchemin3 0:3a7cef09ad54 49 0x01, //NHD_R
ebeauchemin3 0:3a7cef09ad54 50 0x00, //NCL_R
ebeauchemin3 0:3a7cef09ad54 51 0x00 //FDL_R
ebeauchemin3 0:3a7cef09ad54 52 };
ebeauchemin3 0:3a7cef09ad54 53
ebeauchemin3 0:3a7cef09ad54 54 writeMany(MHD_R,gtBaseline,4);
ebeauchemin3 0:3a7cef09ad54 55
ebeauchemin3 0:3a7cef09ad54 56 // Electrode filters for when data is < baseline
ebeauchemin3 0:3a7cef09ad54 57 unsigned char ltBaseline[] = {
ebeauchemin3 0:3a7cef09ad54 58 0x01, //MHD_F
ebeauchemin3 0:3a7cef09ad54 59 0x01, //NHD_F
ebeauchemin3 0:3a7cef09ad54 60 0xFF, //NCL_F
ebeauchemin3 0:3a7cef09ad54 61 0x02 //FDL_F
ebeauchemin3 0:3a7cef09ad54 62 };
ebeauchemin3 0:3a7cef09ad54 63
ebeauchemin3 0:3a7cef09ad54 64 writeMany(MHD_F,ltBaseline,4);
ebeauchemin3 0:3a7cef09ad54 65
ebeauchemin3 0:3a7cef09ad54 66 // Electrode touch and release thresholds
ebeauchemin3 0:3a7cef09ad54 67 unsigned char electrodeThresholds[] = {
ebeauchemin3 0:3a7cef09ad54 68 E_THR_T, // Touch Threshhold
ebeauchemin3 0:3a7cef09ad54 69 E_THR_R // Release Threshold
ebeauchemin3 0:3a7cef09ad54 70 };
ebeauchemin3 0:3a7cef09ad54 71
ebeauchemin3 0:3a7cef09ad54 72 for(int i=0; i<12; i++){
ebeauchemin3 0:3a7cef09ad54 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
ebeauchemin3 0:3a7cef09ad54 74 }
ebeauchemin3 0:3a7cef09ad54 75
ebeauchemin3 0:3a7cef09ad54 76 // Proximity Settings
ebeauchemin3 0:3a7cef09ad54 77 unsigned char proximitySettings[] = {
ebeauchemin3 0:3a7cef09ad54 78 0xff, //MHD_Prox_R
ebeauchemin3 0:3a7cef09ad54 79 0xff, //NHD_Prox_R
ebeauchemin3 0:3a7cef09ad54 80 0x00, //NCL_Prox_R
ebeauchemin3 0:3a7cef09ad54 81 0x00, //FDL_Prox_R
ebeauchemin3 0:3a7cef09ad54 82 0x01, //MHD_Prox_F
ebeauchemin3 0:3a7cef09ad54 83 0x01, //NHD_Prox_F
ebeauchemin3 0:3a7cef09ad54 84 0xFF, //NCL_Prox_F
ebeauchemin3 0:3a7cef09ad54 85 0xff, //FDL_Prox_F
ebeauchemin3 0:3a7cef09ad54 86 0x00, //NHD_Prox_T
ebeauchemin3 0:3a7cef09ad54 87 0x00, //NCL_Prox_T
ebeauchemin3 0:3a7cef09ad54 88 0x00 //NFD_Prox_T
ebeauchemin3 0:3a7cef09ad54 89 };
ebeauchemin3 0:3a7cef09ad54 90 writeMany(MHDPROXR,proximitySettings,11);
ebeauchemin3 0:3a7cef09ad54 91
ebeauchemin3 0:3a7cef09ad54 92 unsigned char proxThresh[] = {
ebeauchemin3 0:3a7cef09ad54 93 PROX_THR_T, // Touch Threshold
ebeauchemin3 0:3a7cef09ad54 94 PROX_THR_R // Release Threshold
ebeauchemin3 0:3a7cef09ad54 95 };
ebeauchemin3 0:3a7cef09ad54 96 writeMany(EPROXTTH,proxThresh,2);
ebeauchemin3 0:3a7cef09ad54 97
ebeauchemin3 0:3a7cef09ad54 98 this->write(FIL_CFG,0x04);
ebeauchemin3 0:3a7cef09ad54 99
ebeauchemin3 0:3a7cef09ad54 100 // Set the electrode config to transition to active mode
ebeauchemin3 0:3a7cef09ad54 101 this->write(ELE_CFG,0x0c);
ebeauchemin3 0:3a7cef09ad54 102 }
ebeauchemin3 0:3a7cef09ad54 103
ebeauchemin3 0:3a7cef09ad54 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
ebeauchemin3 0:3a7cef09ad54 105
ebeauchemin3 0:3a7cef09ad54 106 if(electrode > 11) return;
ebeauchemin3 0:3a7cef09ad54 107
ebeauchemin3 0:3a7cef09ad54 108 // Get the current mode
ebeauchemin3 0:3a7cef09ad54 109 unsigned char mode = this->read(ELE_CFG);
ebeauchemin3 0:3a7cef09ad54 110
ebeauchemin3 0:3a7cef09ad54 111 // Put the MPR into setup mode
ebeauchemin3 0:3a7cef09ad54 112 this->write(ELE_CFG,0x00);
ebeauchemin3 0:3a7cef09ad54 113
ebeauchemin3 0:3a7cef09ad54 114 // Write the new threshold
ebeauchemin3 0:3a7cef09ad54 115 this->write((ELE0_T+(electrode*2)), touch);
ebeauchemin3 0:3a7cef09ad54 116 this->write((ELE0_T+(electrode*2)+1), release);
ebeauchemin3 0:3a7cef09ad54 117
ebeauchemin3 0:3a7cef09ad54 118 //Restore the operating mode
ebeauchemin3 0:3a7cef09ad54 119 this->write(ELE_CFG, mode);
ebeauchemin3 0:3a7cef09ad54 120 }
ebeauchemin3 0:3a7cef09ad54 121
ebeauchemin3 0:3a7cef09ad54 122
ebeauchemin3 0:3a7cef09ad54 123 unsigned char Mpr121::read(int key){
ebeauchemin3 0:3a7cef09ad54 124
ebeauchemin3 0:3a7cef09ad54 125 unsigned char data[2];
ebeauchemin3 0:3a7cef09ad54 126
ebeauchemin3 0:3a7cef09ad54 127 //Start the command
ebeauchemin3 0:3a7cef09ad54 128 i2c->start();
ebeauchemin3 0:3a7cef09ad54 129
ebeauchemin3 0:3a7cef09ad54 130 // Address the target (Write mode)
ebeauchemin3 0:3a7cef09ad54 131 int ack1= i2c->write(address);
ebeauchemin3 0:3a7cef09ad54 132
ebeauchemin3 0:3a7cef09ad54 133 // Set the register key to read
ebeauchemin3 0:3a7cef09ad54 134 int ack2 = i2c->write(key);
ebeauchemin3 0:3a7cef09ad54 135
ebeauchemin3 0:3a7cef09ad54 136 // Re-start for read of data
ebeauchemin3 0:3a7cef09ad54 137 i2c->start();
ebeauchemin3 0:3a7cef09ad54 138
ebeauchemin3 0:3a7cef09ad54 139 // Re-send the target address in read mode
ebeauchemin3 0:3a7cef09ad54 140 int ack3 = i2c->write(address+1);
ebeauchemin3 0:3a7cef09ad54 141
ebeauchemin3 0:3a7cef09ad54 142 // Read in the result
ebeauchemin3 0:3a7cef09ad54 143 data[0] = i2c->read(0);
ebeauchemin3 0:3a7cef09ad54 144
ebeauchemin3 0:3a7cef09ad54 145 // Reset the bus
ebeauchemin3 0:3a7cef09ad54 146 i2c->stop();
ebeauchemin3 0:3a7cef09ad54 147
ebeauchemin3 0:3a7cef09ad54 148 return data[0];
ebeauchemin3 0:3a7cef09ad54 149 }
ebeauchemin3 0:3a7cef09ad54 150
ebeauchemin3 0:3a7cef09ad54 151
ebeauchemin3 0:3a7cef09ad54 152 int Mpr121::write(int key, unsigned char value){
ebeauchemin3 0:3a7cef09ad54 153
ebeauchemin3 0:3a7cef09ad54 154 //Start the command
ebeauchemin3 0:3a7cef09ad54 155 i2c->start();
ebeauchemin3 0:3a7cef09ad54 156
ebeauchemin3 0:3a7cef09ad54 157 // Address the target (Write mode)
ebeauchemin3 0:3a7cef09ad54 158 int ack1= i2c->write(address);
ebeauchemin3 0:3a7cef09ad54 159
ebeauchemin3 0:3a7cef09ad54 160 // Set the register key to write
ebeauchemin3 0:3a7cef09ad54 161 int ack2 = i2c->write(key);
ebeauchemin3 0:3a7cef09ad54 162
ebeauchemin3 0:3a7cef09ad54 163 // Read in the result
ebeauchemin3 0:3a7cef09ad54 164 int ack3 = i2c->write(value);
ebeauchemin3 0:3a7cef09ad54 165
ebeauchemin3 0:3a7cef09ad54 166 // Reset the bus
ebeauchemin3 0:3a7cef09ad54 167 i2c->stop();
ebeauchemin3 0:3a7cef09ad54 168
ebeauchemin3 0:3a7cef09ad54 169 return (ack1+ack2+ack3)-3;
ebeauchemin3 0:3a7cef09ad54 170 }
ebeauchemin3 0:3a7cef09ad54 171
ebeauchemin3 0:3a7cef09ad54 172
ebeauchemin3 0:3a7cef09ad54 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
ebeauchemin3 0:3a7cef09ad54 174 //Start the command
ebeauchemin3 0:3a7cef09ad54 175 i2c->start();
ebeauchemin3 0:3a7cef09ad54 176
ebeauchemin3 0:3a7cef09ad54 177 // Address the target (Write mode)
ebeauchemin3 0:3a7cef09ad54 178 int ack= i2c->write(address);
ebeauchemin3 0:3a7cef09ad54 179 if(ack!=1){
ebeauchemin3 0:3a7cef09ad54 180 return -1;
ebeauchemin3 0:3a7cef09ad54 181 }
ebeauchemin3 0:3a7cef09ad54 182
ebeauchemin3 0:3a7cef09ad54 183 // Set the register key to write
ebeauchemin3 0:3a7cef09ad54 184 ack = i2c->write(start);
ebeauchemin3 0:3a7cef09ad54 185 if(ack!=1){
ebeauchemin3 0:3a7cef09ad54 186 return -1;
ebeauchemin3 0:3a7cef09ad54 187 }
ebeauchemin3 0:3a7cef09ad54 188
ebeauchemin3 0:3a7cef09ad54 189 // Write the date set
ebeauchemin3 0:3a7cef09ad54 190 int count = 0;
ebeauchemin3 0:3a7cef09ad54 191 while(ack==1 && (count < length)){
ebeauchemin3 0:3a7cef09ad54 192 ack = i2c->write(dataSet[count]);
ebeauchemin3 0:3a7cef09ad54 193 count++;
ebeauchemin3 0:3a7cef09ad54 194 }
ebeauchemin3 0:3a7cef09ad54 195 // Stop the cmd
ebeauchemin3 0:3a7cef09ad54 196 i2c->stop();
ebeauchemin3 0:3a7cef09ad54 197
ebeauchemin3 0:3a7cef09ad54 198 return count;
ebeauchemin3 0:3a7cef09ad54 199 }
ebeauchemin3 0:3a7cef09ad54 200
ebeauchemin3 0:3a7cef09ad54 201
ebeauchemin3 0:3a7cef09ad54 202 bool Mpr121::getProximityMode(){
ebeauchemin3 0:3a7cef09ad54 203 if(this->read(ELE_CFG) > 0x0c)
ebeauchemin3 0:3a7cef09ad54 204 return true;
ebeauchemin3 0:3a7cef09ad54 205 else
ebeauchemin3 0:3a7cef09ad54 206 return false;
ebeauchemin3 0:3a7cef09ad54 207 }
ebeauchemin3 0:3a7cef09ad54 208
ebeauchemin3 0:3a7cef09ad54 209 void Mpr121::setProximityMode(bool mode){
ebeauchemin3 0:3a7cef09ad54 210 this->write(ELE_CFG,0x00);
ebeauchemin3 0:3a7cef09ad54 211 if(mode){
ebeauchemin3 0:3a7cef09ad54 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
ebeauchemin3 0:3a7cef09ad54 213 } else {
ebeauchemin3 0:3a7cef09ad54 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
ebeauchemin3 0:3a7cef09ad54 215 }
ebeauchemin3 0:3a7cef09ad54 216 }
ebeauchemin3 0:3a7cef09ad54 217
ebeauchemin3 0:3a7cef09ad54 218
ebeauchemin3 0:3a7cef09ad54 219 int Mpr121::readTouchData(){
ebeauchemin3 0:3a7cef09ad54 220 return this->read(0x00);
ebeauchemin3 0:3a7cef09ad54 221 }