Rachel Huang / Mbed 2 deprecated electric_piano

ece 4180 project 2019

Dependencies:   mbed wave_player mbed-rtos 4DGL-uLCD-SE SDFileSystem FATFileSystem

mpr121.cpp@3:221fb009c1ac, 2019-04-20 (annotated)

Committer:
rhuang77
Date:
Sat Apr 20 21:47:57 2019 +0000
Revision:
3:221fb009c1ac
Parent:
0:567492543056 
finalizing details

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rhuang77 0:567492543056 1 /*
rhuang77 0:567492543056 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
rhuang77 0:567492543056 3
rhuang77 0:567492543056 4 Permission is hereby granted, free of charge, to any person obtaining a copy
rhuang77 0:567492543056 5 of this software and associated documentation files (the "Software"), to deal
rhuang77 0:567492543056 6 in the Software without restriction, including without limitation the rights
rhuang77 0:567492543056 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
rhuang77 0:567492543056 8 copies of the Software, and to permit persons to whom the Software is
rhuang77 0:567492543056 9 furnished to do so, subject to the following conditions:
rhuang77 0:567492543056 10
rhuang77 0:567492543056 11 The above copyright notice and this permission notice shall be included in
rhuang77 0:567492543056 12 all copies or substantial portions of the Software.
rhuang77 0:567492543056 13
rhuang77 0:567492543056 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
rhuang77 0:567492543056 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
rhuang77 0:567492543056 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
rhuang77 0:567492543056 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
rhuang77 0:567492543056 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
rhuang77 0:567492543056 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
rhuang77 0:567492543056 20 THE SOFTWARE.
rhuang77 0:567492543056 21 */
rhuang77 0:567492543056 22
rhuang77 0:567492543056 23 #include <mbed.h>
rhuang77 0:567492543056 24 #include <sstream>
rhuang77 0:567492543056 25 #include <string>
rhuang77 0:567492543056 26 #include <list>
rhuang77 0:567492543056 27
rhuang77 0:567492543056 28 #include <mpr121.h>
rhuang77 0:567492543056 29
rhuang77 0:567492543056 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
rhuang77 0:567492543056 31 {
rhuang77 0:567492543056 32 this->i2c = i2c;
rhuang77 0:567492543056 33
rhuang77 0:567492543056 34 address = i2cAddress;
rhuang77 0:567492543056 35
rhuang77 0:567492543056 36 // Configure the MPR121 settings to default
rhuang77 0:567492543056 37 this->configureSettings();
rhuang77 0:567492543056 38 }
rhuang77 0:567492543056 39
rhuang77 0:567492543056 40
rhuang77 0:567492543056 41 void Mpr121::configureSettings()
rhuang77 0:567492543056 42 {
rhuang77 0:567492543056 43 // Put the MPR into setup mode
rhuang77 0:567492543056 44 this->write(ELE_CFG,0x00);
rhuang77 0:567492543056 45
rhuang77 0:567492543056 46 // Electrode filters for when data is > baseline
rhuang77 0:567492543056 47 unsigned char gtBaseline[] = {
rhuang77 0:567492543056 48 0x01, //MHD_R
rhuang77 0:567492543056 49 0x01, //NHD_R
rhuang77 0:567492543056 50 0x00, //NCL_R
rhuang77 0:567492543056 51 0x00 //FDL_R
rhuang77 0:567492543056 52 };
rhuang77 0:567492543056 53
rhuang77 0:567492543056 54 writeMany(MHD_R,gtBaseline,4);
rhuang77 0:567492543056 55
rhuang77 0:567492543056 56 // Electrode filters for when data is < baseline
rhuang77 0:567492543056 57 unsigned char ltBaseline[] = {
rhuang77 0:567492543056 58 0x01, //MHD_F
rhuang77 0:567492543056 59 0x01, //NHD_F
rhuang77 0:567492543056 60 0xFF, //NCL_F
rhuang77 0:567492543056 61 0x02 //FDL_F
rhuang77 0:567492543056 62 };
rhuang77 0:567492543056 63
rhuang77 0:567492543056 64 writeMany(MHD_F,ltBaseline,4);
rhuang77 0:567492543056 65
rhuang77 0:567492543056 66 // Electrode touch and release thresholds
rhuang77 0:567492543056 67 unsigned char electrodeThresholds[] = {
rhuang77 0:567492543056 68 E_THR_T, // Touch Threshhold
rhuang77 0:567492543056 69 E_THR_R // Release Threshold
rhuang77 0:567492543056 70 };
rhuang77 0:567492543056 71
rhuang77 0:567492543056 72 for(int i=0; i<12; i++){
rhuang77 0:567492543056 73 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
rhuang77 0:567492543056 74 }
rhuang77 0:567492543056 75
rhuang77 0:567492543056 76 // Proximity Settings
rhuang77 0:567492543056 77 unsigned char proximitySettings[] = {
rhuang77 0:567492543056 78 0xff, //MHD_Prox_R
rhuang77 0:567492543056 79 0xff, //NHD_Prox_R
rhuang77 0:567492543056 80 0x00, //NCL_Prox_R
rhuang77 0:567492543056 81 0x00, //FDL_Prox_R
rhuang77 0:567492543056 82 0x01, //MHD_Prox_F
rhuang77 0:567492543056 83 0x01, //NHD_Prox_F
rhuang77 0:567492543056 84 0xFF, //NCL_Prox_F
rhuang77 0:567492543056 85 0xff, //FDL_Prox_F
rhuang77 0:567492543056 86 0x00, //NHD_Prox_T
rhuang77 0:567492543056 87 0x00, //NCL_Prox_T
rhuang77 0:567492543056 88 0x00 //NFD_Prox_T
rhuang77 0:567492543056 89 };
rhuang77 0:567492543056 90 writeMany(MHDPROXR,proximitySettings,11);
rhuang77 0:567492543056 91
rhuang77 0:567492543056 92 unsigned char proxThresh[] = {
rhuang77 0:567492543056 93 PROX_THR_T, // Touch Threshold
rhuang77 0:567492543056 94 PROX_THR_R // Release Threshold
rhuang77 0:567492543056 95 };
rhuang77 0:567492543056 96 writeMany(EPROXTTH,proxThresh,2);
rhuang77 0:567492543056 97
rhuang77 0:567492543056 98 this->write(FIL_CFG,0x04);
rhuang77 0:567492543056 99
rhuang77 0:567492543056 100 // Set the electrode config to transition to active mode
rhuang77 0:567492543056 101 this->write(ELE_CFG,0x0c);
rhuang77 0:567492543056 102 }
rhuang77 0:567492543056 103
rhuang77 0:567492543056 104 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
rhuang77 0:567492543056 105
rhuang77 0:567492543056 106 if(electrode > 11) return;
rhuang77 0:567492543056 107
rhuang77 0:567492543056 108 // Get the current mode
rhuang77 0:567492543056 109 unsigned char mode = this->read(ELE_CFG);
rhuang77 0:567492543056 110
rhuang77 0:567492543056 111 // Put the MPR into setup mode
rhuang77 0:567492543056 112 this->write(ELE_CFG,0x00);
rhuang77 0:567492543056 113
rhuang77 0:567492543056 114 // Write the new threshold
rhuang77 0:567492543056 115 this->write((ELE0_T+(electrode*2)), touch);
rhuang77 0:567492543056 116 this->write((ELE0_T+(electrode*2)+1), release);
rhuang77 0:567492543056 117
rhuang77 0:567492543056 118 //Restore the operating mode
rhuang77 0:567492543056 119 this->write(ELE_CFG, mode);
rhuang77 0:567492543056 120 }
rhuang77 0:567492543056 121
rhuang77 0:567492543056 122
rhuang77 0:567492543056 123 unsigned char Mpr121::read(int key){
rhuang77 0:567492543056 124
rhuang77 0:567492543056 125 unsigned char data[2];
rhuang77 0:567492543056 126
rhuang77 0:567492543056 127 //Start the command
rhuang77 0:567492543056 128 i2c->start();
rhuang77 0:567492543056 129
rhuang77 0:567492543056 130 // Address the target (Write mode)
rhuang77 0:567492543056 131 int ack1= i2c->write(address);
rhuang77 0:567492543056 132
rhuang77 0:567492543056 133 // Set the register key to read
rhuang77 0:567492543056 134 int ack2 = i2c->write(key);
rhuang77 0:567492543056 135
rhuang77 0:567492543056 136 // Re-start for read of data
rhuang77 0:567492543056 137 i2c->start();
rhuang77 0:567492543056 138
rhuang77 0:567492543056 139 // Re-send the target address in read mode
rhuang77 0:567492543056 140 int ack3 = i2c->write(address+1);
rhuang77 0:567492543056 141
rhuang77 0:567492543056 142 // Read in the result
rhuang77 0:567492543056 143 data[0] = i2c->read(0);
rhuang77 0:567492543056 144
rhuang77 0:567492543056 145 // Reset the bus
rhuang77 0:567492543056 146 i2c->stop();
rhuang77 0:567492543056 147
rhuang77 0:567492543056 148 return data[0];
rhuang77 0:567492543056 149 }
rhuang77 0:567492543056 150
rhuang77 0:567492543056 151
rhuang77 0:567492543056 152 int Mpr121::write(int key, unsigned char value){
rhuang77 0:567492543056 153
rhuang77 0:567492543056 154 //Start the command
rhuang77 0:567492543056 155 i2c->start();
rhuang77 0:567492543056 156
rhuang77 0:567492543056 157 // Address the target (Write mode)
rhuang77 0:567492543056 158 int ack1= i2c->write(address);
rhuang77 0:567492543056 159
rhuang77 0:567492543056 160 // Set the register key to write
rhuang77 0:567492543056 161 int ack2 = i2c->write(key);
rhuang77 0:567492543056 162
rhuang77 0:567492543056 163 // Read in the result
rhuang77 0:567492543056 164 int ack3 = i2c->write(value);
rhuang77 0:567492543056 165
rhuang77 0:567492543056 166 // Reset the bus
rhuang77 0:567492543056 167 i2c->stop();
rhuang77 0:567492543056 168
rhuang77 0:567492543056 169 return (ack1+ack2+ack3)-3;
rhuang77 0:567492543056 170 }
rhuang77 0:567492543056 171
rhuang77 0:567492543056 172
rhuang77 0:567492543056 173 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
rhuang77 0:567492543056 174 //Start the command
rhuang77 0:567492543056 175 i2c->start();
rhuang77 0:567492543056 176
rhuang77 0:567492543056 177 // Address the target (Write mode)
rhuang77 0:567492543056 178 int ack= i2c->write(address);
rhuang77 0:567492543056 179 if(ack!=1){
rhuang77 0:567492543056 180 return -1;
rhuang77 0:567492543056 181 }
rhuang77 0:567492543056 182
rhuang77 0:567492543056 183 // Set the register key to write
rhuang77 0:567492543056 184 ack = i2c->write(start);
rhuang77 0:567492543056 185 if(ack!=1){
rhuang77 0:567492543056 186 return -1;
rhuang77 0:567492543056 187 }
rhuang77 0:567492543056 188
rhuang77 0:567492543056 189 // Write the date set
rhuang77 0:567492543056 190 int count = 0;
rhuang77 0:567492543056 191 while(ack==1 && (count < length)){
rhuang77 0:567492543056 192 ack = i2c->write(dataSet[count]);
rhuang77 0:567492543056 193 count++;
rhuang77 0:567492543056 194 }
rhuang77 0:567492543056 195 // Stop the cmd
rhuang77 0:567492543056 196 i2c->stop();
rhuang77 0:567492543056 197
rhuang77 0:567492543056 198 return count;
rhuang77 0:567492543056 199 }
rhuang77 0:567492543056 200
rhuang77 0:567492543056 201
rhuang77 0:567492543056 202 bool Mpr121::getProximityMode(){
rhuang77 0:567492543056 203 if(this->read(ELE_CFG) > 0x0c)
rhuang77 0:567492543056 204 return true;
rhuang77 0:567492543056 205 else
rhuang77 0:567492543056 206 return false;
rhuang77 0:567492543056 207 }
rhuang77 0:567492543056 208
rhuang77 0:567492543056 209 void Mpr121::setProximityMode(bool mode){
rhuang77 0:567492543056 210 this->write(ELE_CFG,0x00);
rhuang77 0:567492543056 211 if(mode){
rhuang77 0:567492543056 212 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
rhuang77 0:567492543056 213 } else {
rhuang77 0:567492543056 214 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
rhuang77 0:567492543056 215 }
rhuang77 0:567492543056 216 }
rhuang77 0:567492543056 217
rhuang77 0:567492543056 218
rhuang77 0:567492543056 219 int Mpr121::readTouchData(){
rhuang77 0:567492543056 220 return this->read(0x00);
rhuang77 0:567492543056 221 }