Pramod Nataraja / Mbed 2 deprecated MP3_Player_Touch_Panel_Input_LCD_Display

MP3 Player with touch panel interface and LCD display.

Dependencies:   TextLCD mbed SDFileSystem

mpr121.cpp@0:a265079d50a2, 2011-10-06 (annotated)

Committer:
pramodnataraja
Date:
Thu Oct 06 06:49:38 2011 +0000
Revision:
0:a265079d50a2
Version 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pramodnataraja 0:a265079d50a2 1 /*
pramodnataraja 0:a265079d50a2 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
pramodnataraja 0:a265079d50a2 3
pramodnataraja 0:a265079d50a2 4 Permission is hereby granted, free of charge, to any person obtaining a copy
pramodnataraja 0:a265079d50a2 5 of this software and associated documentation files (the "Software"), to deal
pramodnataraja 0:a265079d50a2 6 in the Software without restriction, including without limitation the rights
pramodnataraja 0:a265079d50a2 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
pramodnataraja 0:a265079d50a2 8 copies of the Software, and to permit persons to whom the Software is
pramodnataraja 0:a265079d50a2 9 furnished to do so, subject to the following conditions:
pramodnataraja 0:a265079d50a2 10
pramodnataraja 0:a265079d50a2 11 The above copyright notice and this permission notice shall be included in
pramodnataraja 0:a265079d50a2 12 all copies or substantial portions of the Software.
pramodnataraja 0:a265079d50a2 13
pramodnataraja 0:a265079d50a2 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pramodnataraja 0:a265079d50a2 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pramodnataraja 0:a265079d50a2 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pramodnataraja 0:a265079d50a2 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pramodnataraja 0:a265079d50a2 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pramodnataraja 0:a265079d50a2 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
pramodnataraja 0:a265079d50a2 20 THE SOFTWARE.
pramodnataraja 0:a265079d50a2 21 */
pramodnataraja 0:a265079d50a2 22
pramodnataraja 0:a265079d50a2 23 #include <mbed.h>
pramodnataraja 0:a265079d50a2 24 #include <sstream>
pramodnataraja 0:a265079d50a2 25 #include <string>
pramodnataraja 0:a265079d50a2 26 #include <list>
pramodnataraja 0:a265079d50a2 27
pramodnataraja 0:a265079d50a2 28 #include <mpr121.h>
pramodnataraja 0:a265079d50a2 29
pramodnataraja 0:a265079d50a2 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
pramodnataraja 0:a265079d50a2 31 {
pramodnataraja 0:a265079d50a2 32 this->i2c = i2c;
pramodnataraja 0:a265079d50a2 33
pramodnataraja 0:a265079d50a2 34 address = i2cAddress;
pramodnataraja 0:a265079d50a2 35
pramodnataraja 0:a265079d50a2 36 // Configure the MPR121 settings to default
pramodnataraja 0:a265079d50a2 37 this->configureSettings();
pramodnataraja 0:a265079d50a2 38 }
pramodnataraja 0:a265079d50a2 39
pramodnataraja 0:a265079d50a2 40
pramodnataraja 0:a265079d50a2 41 void Mpr121::configureSettings()
pramodnataraja 0:a265079d50a2 42 {
pramodnataraja 0:a265079d50a2 43 // Put the MPR into setup mode
pramodnataraja 0:a265079d50a2 44 this->write(ELE_CFG,0x00);
pramodnataraja 0:a265079d50a2 45
pramodnataraja 0:a265079d50a2 46 // Electrode filters for when data is > baseline
pramodnataraja 0:a265079d50a2 47 unsigned char gtBaseline[] = {
pramodnataraja 0:a265079d50a2 48 0x01, //MHD_R
pramodnataraja 0:a265079d50a2 49 0x01, //NHD_R
pramodnataraja 0:a265079d50a2 50 0x00, //NCL_R
pramodnataraja 0:a265079d50a2 51 0x00 //FDL_R
pramodnataraja 0:a265079d50a2 52 };
pramodnataraja 0:a265079d50a2 53
pramodnataraja 0:a265079d50a2 54 writeMany(MHD_R,gtBaseline,4);
pramodnataraja 0:a265079d50a2 55
pramodnataraja 0:a265079d50a2 56 // Electrode filters for when data is < baseline
pramodnataraja 0:a265079d50a2 57 unsigned char ltBaseline[] = {
pramodnataraja 0:a265079d50a2 58 0x01, //MHD_F
pramodnataraja 0:a265079d50a2 59 0x01, //NHD_F
pramodnataraja 0:a265079d50a2 60 0xFF, //NCL_F
pramodnataraja 0:a265079d50a2 61 0x02 //FDL_F
pramodnataraja 0:a265079d50a2 62 };
pramodnataraja 0:a265079d50a2 63
pramodnataraja 0:a265079d50a2 64 writeMany(MHD_F,ltBaseline,4);
pramodnataraja 0:a265079d50a2 65
pramodnataraja 0:a265079d50a2 66 // Electrode touch and release thresholds
pramodnataraja 0:a265079d50a2 67 unsigned char electrodeThresholds[] = {
pramodnataraja 0:a265079d50a2 68 E_THR_T, // Touch Threshhold
pramodnataraja 0:a265079d50a2 69 E_THR_R // Release Threshold
pramodnataraja 0:a265079d50a2 70 };
pramodnataraja 0:a265079d50a2 71
pramodnataraja 0:a265079d50a2 72 for(int i=0; i<12; i++){
pramodnataraja 0:a265079d50a2 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
pramodnataraja 0:a265079d50a2 74 }
pramodnataraja 0:a265079d50a2 75
pramodnataraja 0:a265079d50a2 76 // Proximity Settings
pramodnataraja 0:a265079d50a2 77 unsigned char proximitySettings[] = {
pramodnataraja 0:a265079d50a2 78 0xff, //MHD_Prox_R
pramodnataraja 0:a265079d50a2 79 0xff, //NHD_Prox_R
pramodnataraja 0:a265079d50a2 80 0x00, //NCL_Prox_R
pramodnataraja 0:a265079d50a2 81 0x00, //FDL_Prox_R
pramodnataraja 0:a265079d50a2 82 0x01, //MHD_Prox_F
pramodnataraja 0:a265079d50a2 83 0x01, //NHD_Prox_F
pramodnataraja 0:a265079d50a2 84 0xFF, //NCL_Prox_F
pramodnataraja 0:a265079d50a2 85 0xff, //FDL_Prox_F
pramodnataraja 0:a265079d50a2 86 0x00, //NHD_Prox_T
pramodnataraja 0:a265079d50a2 87 0x00, //NCL_Prox_T
pramodnataraja 0:a265079d50a2 88 0x00 //NFD_Prox_T
pramodnataraja 0:a265079d50a2 89 };
pramodnataraja 0:a265079d50a2 90 writeMany(MHDPROXR,proximitySettings,11);
pramodnataraja 0:a265079d50a2 91
pramodnataraja 0:a265079d50a2 92 unsigned char proxThresh[] = {
pramodnataraja 0:a265079d50a2 93 PROX_THR_T, // Touch Threshold
pramodnataraja 0:a265079d50a2 94 PROX_THR_R // Release Threshold
pramodnataraja 0:a265079d50a2 95 };
pramodnataraja 0:a265079d50a2 96 writeMany(EPROXTTH,proxThresh,2);
pramodnataraja 0:a265079d50a2 97
pramodnataraja 0:a265079d50a2 98 this->write(FIL_CFG,0x04);
pramodnataraja 0:a265079d50a2 99
pramodnataraja 0:a265079d50a2 100 // Set the electrode config to transition to active mode
pramodnataraja 0:a265079d50a2 101 this->write(ELE_CFG,0x0c);
pramodnataraja 0:a265079d50a2 102 }
pramodnataraja 0:a265079d50a2 103
pramodnataraja 0:a265079d50a2 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
pramodnataraja 0:a265079d50a2 105
pramodnataraja 0:a265079d50a2 106 if(electrode > 11) return;
pramodnataraja 0:a265079d50a2 107
pramodnataraja 0:a265079d50a2 108 // Get the current mode
pramodnataraja 0:a265079d50a2 109 unsigned char mode = this->read(ELE_CFG);
pramodnataraja 0:a265079d50a2 110
pramodnataraja 0:a265079d50a2 111 // Put the MPR into setup mode
pramodnataraja 0:a265079d50a2 112 this->write(ELE_CFG,0x00);
pramodnataraja 0:a265079d50a2 113
pramodnataraja 0:a265079d50a2 114 // Write the new threshold
pramodnataraja 0:a265079d50a2 115 this->write((ELE0_T+(electrode*2)), touch);
pramodnataraja 0:a265079d50a2 116 this->write((ELE0_T+(electrode*2)+1), release);
pramodnataraja 0:a265079d50a2 117
pramodnataraja 0:a265079d50a2 118 //Restore the operating mode
pramodnataraja 0:a265079d50a2 119 this->write(ELE_CFG, mode);
pramodnataraja 0:a265079d50a2 120 }
pramodnataraja 0:a265079d50a2 121
pramodnataraja 0:a265079d50a2 122
pramodnataraja 0:a265079d50a2 123 unsigned char Mpr121::read(int key){
pramodnataraja 0:a265079d50a2 124
pramodnataraja 0:a265079d50a2 125 unsigned char data[2];
pramodnataraja 0:a265079d50a2 126
pramodnataraja 0:a265079d50a2 127 //Start the command
pramodnataraja 0:a265079d50a2 128 i2c->start();
pramodnataraja 0:a265079d50a2 129
pramodnataraja 0:a265079d50a2 130 // Address the target (Write mode)
pramodnataraja 0:a265079d50a2 131 int ack1= i2c->write(address);
pramodnataraja 0:a265079d50a2 132
pramodnataraja 0:a265079d50a2 133 // Set the register key to read
pramodnataraja 0:a265079d50a2 134 int ack2 = i2c->write(key);
pramodnataraja 0:a265079d50a2 135
pramodnataraja 0:a265079d50a2 136 // Re-start for read of data
pramodnataraja 0:a265079d50a2 137 i2c->start();
pramodnataraja 0:a265079d50a2 138
pramodnataraja 0:a265079d50a2 139 // Re-send the target address in read mode
pramodnataraja 0:a265079d50a2 140 int ack3 = i2c->write(address+1);
pramodnataraja 0:a265079d50a2 141
pramodnataraja 0:a265079d50a2 142 // Read in the result
pramodnataraja 0:a265079d50a2 143 data[0] = i2c->read(0);
pramodnataraja 0:a265079d50a2 144
pramodnataraja 0:a265079d50a2 145 // Reset the bus
pramodnataraja 0:a265079d50a2 146 i2c->stop();
pramodnataraja 0:a265079d50a2 147
pramodnataraja 0:a265079d50a2 148 return data[0];
pramodnataraja 0:a265079d50a2 149 }
pramodnataraja 0:a265079d50a2 150
pramodnataraja 0:a265079d50a2 151
pramodnataraja 0:a265079d50a2 152 int Mpr121::write(int key, unsigned char value){
pramodnataraja 0:a265079d50a2 153
pramodnataraja 0:a265079d50a2 154 //Start the command
pramodnataraja 0:a265079d50a2 155 i2c->start();
pramodnataraja 0:a265079d50a2 156
pramodnataraja 0:a265079d50a2 157 // Address the target (Write mode)
pramodnataraja 0:a265079d50a2 158 int ack1= i2c->write(address);
pramodnataraja 0:a265079d50a2 159
pramodnataraja 0:a265079d50a2 160 // Set the register key to write
pramodnataraja 0:a265079d50a2 161 int ack2 = i2c->write(key);
pramodnataraja 0:a265079d50a2 162
pramodnataraja 0:a265079d50a2 163 // Read in the result
pramodnataraja 0:a265079d50a2 164 int ack3 = i2c->write(value);
pramodnataraja 0:a265079d50a2 165
pramodnataraja 0:a265079d50a2 166 // Reset the bus
pramodnataraja 0:a265079d50a2 167 i2c->stop();
pramodnataraja 0:a265079d50a2 168
pramodnataraja 0:a265079d50a2 169 return (ack1+ack2+ack3)-3;
pramodnataraja 0:a265079d50a2 170 }
pramodnataraja 0:a265079d50a2 171
pramodnataraja 0:a265079d50a2 172
pramodnataraja 0:a265079d50a2 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
pramodnataraja 0:a265079d50a2 174 //Start the command
pramodnataraja 0:a265079d50a2 175 i2c->start();
pramodnataraja 0:a265079d50a2 176
pramodnataraja 0:a265079d50a2 177 // Address the target (Write mode)
pramodnataraja 0:a265079d50a2 178 int ack= i2c->write(address);
pramodnataraja 0:a265079d50a2 179 if(ack!=1){
pramodnataraja 0:a265079d50a2 180 return -1;
pramodnataraja 0:a265079d50a2 181 }
pramodnataraja 0:a265079d50a2 182
pramodnataraja 0:a265079d50a2 183 // Set the register key to write
pramodnataraja 0:a265079d50a2 184 ack = i2c->write(start);
pramodnataraja 0:a265079d50a2 185 if(ack!=1){
pramodnataraja 0:a265079d50a2 186 return -1;
pramodnataraja 0:a265079d50a2 187 }
pramodnataraja 0:a265079d50a2 188
pramodnataraja 0:a265079d50a2 189 // Write the date set
pramodnataraja 0:a265079d50a2 190 int count = 0;
pramodnataraja 0:a265079d50a2 191 while(ack==1 && (count < length)){
pramodnataraja 0:a265079d50a2 192 ack = i2c->write(dataSet[count]);
pramodnataraja 0:a265079d50a2 193 count++;
pramodnataraja 0:a265079d50a2 194 }
pramodnataraja 0:a265079d50a2 195 // Stop the cmd
pramodnataraja 0:a265079d50a2 196 i2c->stop();
pramodnataraja 0:a265079d50a2 197
pramodnataraja 0:a265079d50a2 198 return count;
pramodnataraja 0:a265079d50a2 199 }
pramodnataraja 0:a265079d50a2 200
pramodnataraja 0:a265079d50a2 201
pramodnataraja 0:a265079d50a2 202 bool Mpr121::getProximityMode(){
pramodnataraja 0:a265079d50a2 203 if(this->read(ELE_CFG) > 0x0c)
pramodnataraja 0:a265079d50a2 204 return true;
pramodnataraja 0:a265079d50a2 205 else
pramodnataraja 0:a265079d50a2 206 return false;
pramodnataraja 0:a265079d50a2 207 }
pramodnataraja 0:a265079d50a2 208
pramodnataraja 0:a265079d50a2 209 void Mpr121::setProximityMode(bool mode){
pramodnataraja 0:a265079d50a2 210 this->write(ELE_CFG,0x00);
pramodnataraja 0:a265079d50a2 211 if(mode){
pramodnataraja 0:a265079d50a2 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
pramodnataraja 0:a265079d50a2 213 } else {
pramodnataraja 0:a265079d50a2 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
pramodnataraja 0:a265079d50a2 215 }
pramodnataraja 0:a265079d50a2 216 }
pramodnataraja 0:a265079d50a2 217
pramodnataraja 0:a265079d50a2 218
pramodnataraja 0:a265079d50a2 219 int Mpr121::readTouchData(){
pramodnataraja 0:a265079d50a2 220 return this->read(0x00);
pramodnataraja 0:a265079d50a2 221 }