James Hawkins / Mbed 2 deprecated Beat_Demo_full_full

Demo of MP121 I2C touch sensors (playing piano keys)

Dependencies:   4DGL-uLCD-SE SDFileSystem Speaker mbed

mpr121.cpp@0:81b352a233ca, 2014-10-22 (annotated)

Committer:
jhawkins38
Date:
Wed Oct 22 01:17:25 2014 +0000
Revision:
0:81b352a233ca
passed playPtr to play method in wave_play class

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jhawkins38 0:81b352a233ca 1 /*
jhawkins38 0:81b352a233ca 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
jhawkins38 0:81b352a233ca 3
jhawkins38 0:81b352a233ca 4 Permission is hereby granted, free of charge, to any person obtaining a copy
jhawkins38 0:81b352a233ca 5 of this software and associated documentation files (the "Software"), to deal
jhawkins38 0:81b352a233ca 6 in the Software without restriction, including without limitation the rights
jhawkins38 0:81b352a233ca 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jhawkins38 0:81b352a233ca 8 copies of the Software, and to permit persons to whom the Software is
jhawkins38 0:81b352a233ca 9 furnished to do so, subject to the following conditions:
jhawkins38 0:81b352a233ca 10
jhawkins38 0:81b352a233ca 11 The above copyright notice and this permission notice shall be included in
jhawkins38 0:81b352a233ca 12 all copies or substantial portions of the Software.
jhawkins38 0:81b352a233ca 13
jhawkins38 0:81b352a233ca 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jhawkins38 0:81b352a233ca 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jhawkins38 0:81b352a233ca 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jhawkins38 0:81b352a233ca 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jhawkins38 0:81b352a233ca 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jhawkins38 0:81b352a233ca 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
jhawkins38 0:81b352a233ca 20 THE SOFTWARE.
jhawkins38 0:81b352a233ca 21 */
jhawkins38 0:81b352a233ca 22
jhawkins38 0:81b352a233ca 23 #include <mbed.h>
jhawkins38 0:81b352a233ca 24 #include <sstream>
jhawkins38 0:81b352a233ca 25 #include <string>
jhawkins38 0:81b352a233ca 26 #include <list>
jhawkins38 0:81b352a233ca 27
jhawkins38 0:81b352a233ca 28 #include <mpr121.h>
jhawkins38 0:81b352a233ca 29
jhawkins38 0:81b352a233ca 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
jhawkins38 0:81b352a233ca 31 {
jhawkins38 0:81b352a233ca 32 this->i2c = i2c;
jhawkins38 0:81b352a233ca 33
jhawkins38 0:81b352a233ca 34 address = i2cAddress;
jhawkins38 0:81b352a233ca 35
jhawkins38 0:81b352a233ca 36 // Configure the MPR121 settings to default
jhawkins38 0:81b352a233ca 37 this->configureSettings();
jhawkins38 0:81b352a233ca 38 }
jhawkins38 0:81b352a233ca 39
jhawkins38 0:81b352a233ca 40
jhawkins38 0:81b352a233ca 41 void Mpr121::configureSettings()
jhawkins38 0:81b352a233ca 42 {
jhawkins38 0:81b352a233ca 43 // Put the MPR into setup mode
jhawkins38 0:81b352a233ca 44 this->write(ELE_CFG,0x00);
jhawkins38 0:81b352a233ca 45
jhawkins38 0:81b352a233ca 46 // Electrode filters for when data is > baseline
jhawkins38 0:81b352a233ca 47 unsigned char gtBaseline[] = {
jhawkins38 0:81b352a233ca 48 0x01, //MHD_R
jhawkins38 0:81b352a233ca 49 0x01, //NHD_R
jhawkins38 0:81b352a233ca 50 0x00, //NCL_R
jhawkins38 0:81b352a233ca 51 0x00 //FDL_R
jhawkins38 0:81b352a233ca 52 };
jhawkins38 0:81b352a233ca 53
jhawkins38 0:81b352a233ca 54 writeMany(MHD_R,gtBaseline,4);
jhawkins38 0:81b352a233ca 55
jhawkins38 0:81b352a233ca 56 // Electrode filters for when data is < baseline
jhawkins38 0:81b352a233ca 57 unsigned char ltBaseline[] = {
jhawkins38 0:81b352a233ca 58 0x01, //MHD_F
jhawkins38 0:81b352a233ca 59 0x01, //NHD_F
jhawkins38 0:81b352a233ca 60 0xFF, //NCL_F
jhawkins38 0:81b352a233ca 61 0x02 //FDL_F
jhawkins38 0:81b352a233ca 62 };
jhawkins38 0:81b352a233ca 63
jhawkins38 0:81b352a233ca 64 writeMany(MHD_F,ltBaseline,4);
jhawkins38 0:81b352a233ca 65
jhawkins38 0:81b352a233ca 66 // Electrode touch and release thresholds
jhawkins38 0:81b352a233ca 67 unsigned char electrodeThresholds[] = {
jhawkins38 0:81b352a233ca 68 E_THR_T, // Touch Threshhold
jhawkins38 0:81b352a233ca 69 E_THR_R // Release Threshold
jhawkins38 0:81b352a233ca 70 };
jhawkins38 0:81b352a233ca 71
jhawkins38 0:81b352a233ca 72 for(int i=0; i<12; i++){
jhawkins38 0:81b352a233ca 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
jhawkins38 0:81b352a233ca 74 }
jhawkins38 0:81b352a233ca 75
jhawkins38 0:81b352a233ca 76 // Proximity Settings
jhawkins38 0:81b352a233ca 77 unsigned char proximitySettings[] = {
jhawkins38 0:81b352a233ca 78 0xff, //MHD_Prox_R
jhawkins38 0:81b352a233ca 79 0xff, //NHD_Prox_R
jhawkins38 0:81b352a233ca 80 0x00, //NCL_Prox_R
jhawkins38 0:81b352a233ca 81 0x00, //FDL_Prox_R
jhawkins38 0:81b352a233ca 82 0x01, //MHD_Prox_F
jhawkins38 0:81b352a233ca 83 0x01, //NHD_Prox_F
jhawkins38 0:81b352a233ca 84 0xFF, //NCL_Prox_F
jhawkins38 0:81b352a233ca 85 0xff, //FDL_Prox_F
jhawkins38 0:81b352a233ca 86 0x00, //NHD_Prox_T
jhawkins38 0:81b352a233ca 87 0x00, //NCL_Prox_T
jhawkins38 0:81b352a233ca 88 0x00 //NFD_Prox_T
jhawkins38 0:81b352a233ca 89 };
jhawkins38 0:81b352a233ca 90 writeMany(MHDPROXR,proximitySettings,11);
jhawkins38 0:81b352a233ca 91
jhawkins38 0:81b352a233ca 92 unsigned char proxThresh[] = {
jhawkins38 0:81b352a233ca 93 PROX_THR_T, // Touch Threshold
jhawkins38 0:81b352a233ca 94 PROX_THR_R // Release Threshold
jhawkins38 0:81b352a233ca 95 };
jhawkins38 0:81b352a233ca 96 writeMany(EPROXTTH,proxThresh,2);
jhawkins38 0:81b352a233ca 97
jhawkins38 0:81b352a233ca 98 this->write(FIL_CFG,0x04);
jhawkins38 0:81b352a233ca 99
jhawkins38 0:81b352a233ca 100 // Set the electrode config to transition to active mode
jhawkins38 0:81b352a233ca 101 this->write(ELE_CFG,0x0c);
jhawkins38 0:81b352a233ca 102 }
jhawkins38 0:81b352a233ca 103
jhawkins38 0:81b352a233ca 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
jhawkins38 0:81b352a233ca 105
jhawkins38 0:81b352a233ca 106 if(electrode > 11) return;
jhawkins38 0:81b352a233ca 107
jhawkins38 0:81b352a233ca 108 // Get the current mode
jhawkins38 0:81b352a233ca 109 unsigned char mode = this->read(ELE_CFG);
jhawkins38 0:81b352a233ca 110
jhawkins38 0:81b352a233ca 111 // Put the MPR into setup mode
jhawkins38 0:81b352a233ca 112 this->write(ELE_CFG,0x00);
jhawkins38 0:81b352a233ca 113
jhawkins38 0:81b352a233ca 114 // Write the new threshold
jhawkins38 0:81b352a233ca 115 this->write((ELE0_T+(electrode*2)), touch);
jhawkins38 0:81b352a233ca 116 this->write((ELE0_T+(electrode*2)+1), release);
jhawkins38 0:81b352a233ca 117
jhawkins38 0:81b352a233ca 118 //Restore the operating mode
jhawkins38 0:81b352a233ca 119 this->write(ELE_CFG, mode);
jhawkins38 0:81b352a233ca 120 }
jhawkins38 0:81b352a233ca 121
jhawkins38 0:81b352a233ca 122
jhawkins38 0:81b352a233ca 123 unsigned char Mpr121::read(int key){
jhawkins38 0:81b352a233ca 124
jhawkins38 0:81b352a233ca 125 unsigned char data[2];
jhawkins38 0:81b352a233ca 126
jhawkins38 0:81b352a233ca 127 //Start the command
jhawkins38 0:81b352a233ca 128 i2c->start();
jhawkins38 0:81b352a233ca 129
jhawkins38 0:81b352a233ca 130 // Address the target (Write mode)
jhawkins38 0:81b352a233ca 131 int ack1= i2c->write(address);
jhawkins38 0:81b352a233ca 132
jhawkins38 0:81b352a233ca 133 // Set the register key to read
jhawkins38 0:81b352a233ca 134 int ack2 = i2c->write(key);
jhawkins38 0:81b352a233ca 135
jhawkins38 0:81b352a233ca 136 // Re-start for read of data
jhawkins38 0:81b352a233ca 137 i2c->start();
jhawkins38 0:81b352a233ca 138
jhawkins38 0:81b352a233ca 139 // Re-send the target address in read mode
jhawkins38 0:81b352a233ca 140 int ack3 = i2c->write(address+1);
jhawkins38 0:81b352a233ca 141
jhawkins38 0:81b352a233ca 142 // Read in the result
jhawkins38 0:81b352a233ca 143 data[0] = i2c->read(0);
jhawkins38 0:81b352a233ca 144
jhawkins38 0:81b352a233ca 145 // Reset the bus
jhawkins38 0:81b352a233ca 146 i2c->stop();
jhawkins38 0:81b352a233ca 147
jhawkins38 0:81b352a233ca 148 return data[0];
jhawkins38 0:81b352a233ca 149 }
jhawkins38 0:81b352a233ca 150
jhawkins38 0:81b352a233ca 151
jhawkins38 0:81b352a233ca 152 int Mpr121::write(int key, unsigned char value){
jhawkins38 0:81b352a233ca 153
jhawkins38 0:81b352a233ca 154 //Start the command
jhawkins38 0:81b352a233ca 155 i2c->start();
jhawkins38 0:81b352a233ca 156
jhawkins38 0:81b352a233ca 157 // Address the target (Write mode)
jhawkins38 0:81b352a233ca 158 int ack1= i2c->write(address);
jhawkins38 0:81b352a233ca 159
jhawkins38 0:81b352a233ca 160 // Set the register key to write
jhawkins38 0:81b352a233ca 161 int ack2 = i2c->write(key);
jhawkins38 0:81b352a233ca 162
jhawkins38 0:81b352a233ca 163 // Read in the result
jhawkins38 0:81b352a233ca 164 int ack3 = i2c->write(value);
jhawkins38 0:81b352a233ca 165
jhawkins38 0:81b352a233ca 166 // Reset the bus
jhawkins38 0:81b352a233ca 167 i2c->stop();
jhawkins38 0:81b352a233ca 168
jhawkins38 0:81b352a233ca 169 return (ack1+ack2+ack3)-3;
jhawkins38 0:81b352a233ca 170 }
jhawkins38 0:81b352a233ca 171
jhawkins38 0:81b352a233ca 172
jhawkins38 0:81b352a233ca 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
jhawkins38 0:81b352a233ca 174 //Start the command
jhawkins38 0:81b352a233ca 175 i2c->start();
jhawkins38 0:81b352a233ca 176
jhawkins38 0:81b352a233ca 177 // Address the target (Write mode)
jhawkins38 0:81b352a233ca 178 int ack= i2c->write(address);
jhawkins38 0:81b352a233ca 179 if(ack!=1){
jhawkins38 0:81b352a233ca 180 return -1;
jhawkins38 0:81b352a233ca 181 }
jhawkins38 0:81b352a233ca 182
jhawkins38 0:81b352a233ca 183 // Set the register key to write
jhawkins38 0:81b352a233ca 184 ack = i2c->write(start);
jhawkins38 0:81b352a233ca 185 if(ack!=1){
jhawkins38 0:81b352a233ca 186 return -1;
jhawkins38 0:81b352a233ca 187 }
jhawkins38 0:81b352a233ca 188
jhawkins38 0:81b352a233ca 189 // Write the date set
jhawkins38 0:81b352a233ca 190 int count = 0;
jhawkins38 0:81b352a233ca 191 while(ack==1 && (count < length)){
jhawkins38 0:81b352a233ca 192 ack = i2c->write(dataSet[count]);
jhawkins38 0:81b352a233ca 193 count++;
jhawkins38 0:81b352a233ca 194 }
jhawkins38 0:81b352a233ca 195 // Stop the cmd
jhawkins38 0:81b352a233ca 196 i2c->stop();
jhawkins38 0:81b352a233ca 197
jhawkins38 0:81b352a233ca 198 return count;
jhawkins38 0:81b352a233ca 199 }
jhawkins38 0:81b352a233ca 200
jhawkins38 0:81b352a233ca 201
jhawkins38 0:81b352a233ca 202 bool Mpr121::getProximityMode(){
jhawkins38 0:81b352a233ca 203 if(this->read(ELE_CFG) > 0x0c)
jhawkins38 0:81b352a233ca 204 return true;
jhawkins38 0:81b352a233ca 205 else
jhawkins38 0:81b352a233ca 206 return false;
jhawkins38 0:81b352a233ca 207 }
jhawkins38 0:81b352a233ca 208
jhawkins38 0:81b352a233ca 209 void Mpr121::setProximityMode(bool mode){
jhawkins38 0:81b352a233ca 210 this->write(ELE_CFG,0x00);
jhawkins38 0:81b352a233ca 211 if(mode){
jhawkins38 0:81b352a233ca 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
jhawkins38 0:81b352a233ca 213 } else {
jhawkins38 0:81b352a233ca 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
jhawkins38 0:81b352a233ca 215 }
jhawkins38 0:81b352a233ca 216 }
jhawkins38 0:81b352a233ca 217
jhawkins38 0:81b352a233ca 218
jhawkins38 0:81b352a233ca 219 int Mpr121::readTouchData(){
jhawkins38 0:81b352a233ca 220 return this->read(0x00);
jhawkins38 0:81b352a233ca 221 }