Aditya Barve / Mbed 2 deprecated image_zooming

This is a code which generates the various zoomed versions of an image stored in an SD card and displays it on a Nokia LCD based on the keys pressed on a capacitive touch pad.

Dependencies:   FatFileSystem mbed

Fork of Lab3 by Martin Sturm

MPR121/mpr121.cpp@1:6048138606a0, 2012-10-11 (annotated)

Committer:
abarve9
Date:
Thu Oct 11 06:10:31 2012 +0000
Revision:
1:6048138606a0
Parent:
0:c546b51ecf0b 
This is an image zooming program which reads an image stored in an SD card and displays the various zoomed versions of the image based on the key pressed in the capacitive touch sensor.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
XkLi 0:c546b51ecf0b 1 /*
XkLi 0:c546b51ecf0b 2 Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
XkLi 0:c546b51ecf0b 3
XkLi 0:c546b51ecf0b 4 Permission is hereby granted, free of charge, to any person obtaining a copy
XkLi 0:c546b51ecf0b 5 of this software and associated documentation files (the "Software"), to deal
XkLi 0:c546b51ecf0b 6 in the Software without restriction, including without limitation the rights
XkLi 0:c546b51ecf0b 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
XkLi 0:c546b51ecf0b 8 copies of the Software, and to permit persons to whom the Software is
XkLi 0:c546b51ecf0b 9 furnished to do so, subject to the following conditions:
XkLi 0:c546b51ecf0b 10
XkLi 0:c546b51ecf0b 11 The above copyright notice and this permission notice shall be included in
XkLi 0:c546b51ecf0b 12 all copies or substantial portions of the Software.
XkLi 0:c546b51ecf0b 13
XkLi 0:c546b51ecf0b 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
XkLi 0:c546b51ecf0b 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
XkLi 0:c546b51ecf0b 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
XkLi 0:c546b51ecf0b 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
XkLi 0:c546b51ecf0b 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
XkLi 0:c546b51ecf0b 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
XkLi 0:c546b51ecf0b 20 THE SOFTWARE.
XkLi 0:c546b51ecf0b 21 */
XkLi 0:c546b51ecf0b 22
XkLi 0:c546b51ecf0b 23 #include <mbed.h>
XkLi 0:c546b51ecf0b 24 #include <sstream>
XkLi 0:c546b51ecf0b 25 #include <string>
XkLi 0:c546b51ecf0b 26 #include <list>
XkLi 0:c546b51ecf0b 27
XkLi 0:c546b51ecf0b 28 #include <mpr121.h>
XkLi 0:c546b51ecf0b 29
XkLi 0:c546b51ecf0b 30 Mpr121::Mpr121(I2C *i2c, Address i2cAddress)
XkLi 0:c546b51ecf0b 31 {
XkLi 0:c546b51ecf0b 32 this->i2c = i2c;
XkLi 0:c546b51ecf0b 33
XkLi 0:c546b51ecf0b 34 address = i2cAddress;
XkLi 0:c546b51ecf0b 35
XkLi 0:c546b51ecf0b 36 // Configure the MPR121 settings to default
XkLi 0:c546b51ecf0b 37
XkLi 0:c546b51ecf0b 38 this->configureSettings();
XkLi 0:c546b51ecf0b 39 }
XkLi 0:c546b51ecf0b 40
XkLi 0:c546b51ecf0b 41
XkLi 0:c546b51ecf0b 42 void Mpr121::configureSettings()
XkLi 0:c546b51ecf0b 43 {
XkLi 0:c546b51ecf0b 44 // Put the MPR into setup mode
XkLi 0:c546b51ecf0b 45 this->write(ELE_CFG,0x00);
XkLi 0:c546b51ecf0b 46
XkLi 0:c546b51ecf0b 47 // Electrode filters for when data is > baseline
XkLi 0:c546b51ecf0b 48 unsigned char gtBaseline[] = {
XkLi 0:c546b51ecf0b 49 0x01, //MHD_R
XkLi 0:c546b51ecf0b 50 0x01, //NHD_R
XkLi 0:c546b51ecf0b 51 0x00, //NCL_R
XkLi 0:c546b51ecf0b 52 0x00 //FDL_R
XkLi 0:c546b51ecf0b 53 };
XkLi 0:c546b51ecf0b 54
XkLi 0:c546b51ecf0b 55 writeMany(MHD_R,gtBaseline,4);
XkLi 0:c546b51ecf0b 56
XkLi 0:c546b51ecf0b 57 // Electrode filters for when data is < baseline
XkLi 0:c546b51ecf0b 58 unsigned char ltBaseline[] = {
XkLi 0:c546b51ecf0b 59 0x01, //MHD_F
XkLi 0:c546b51ecf0b 60 0x01, //NHD_F
XkLi 0:c546b51ecf0b 61 0xFF, //NCL_F
XkLi 0:c546b51ecf0b 62 0x02 //FDL_F
XkLi 0:c546b51ecf0b 63 };
XkLi 0:c546b51ecf0b 64
XkLi 0:c546b51ecf0b 65 writeMany(MHD_F,ltBaseline,4);
XkLi 0:c546b51ecf0b 66
XkLi 0:c546b51ecf0b 67 // Electrode touch and release thresholds
XkLi 0:c546b51ecf0b 68 unsigned char electrodeThresholds[] = {
XkLi 0:c546b51ecf0b 69 E_THR_T, // Touch Threshhold
XkLi 0:c546b51ecf0b 70 E_THR_R // Release Threshold
XkLi 0:c546b51ecf0b 71 };
XkLi 0:c546b51ecf0b 72
XkLi 0:c546b51ecf0b 73 for(int i=0; i<12; i++){
XkLi 0:c546b51ecf0b 74 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
XkLi 0:c546b51ecf0b 75 }
XkLi 0:c546b51ecf0b 76
XkLi 0:c546b51ecf0b 77 // Proximity Settings
XkLi 0:c546b51ecf0b 78 unsigned char proximitySettings[] = {
XkLi 0:c546b51ecf0b 79 0xff, //MHD_Prox_R
XkLi 0:c546b51ecf0b 80 0xff, //NHD_Prox_R
XkLi 0:c546b51ecf0b 81 0x00, //NCL_Prox_R
XkLi 0:c546b51ecf0b 82 0x00, //FDL_Prox_R
XkLi 0:c546b51ecf0b 83 0x01, //MHD_Prox_F
XkLi 0:c546b51ecf0b 84 0x01, //NHD_Prox_F
XkLi 0:c546b51ecf0b 85 0xFF, //NCL_Prox_F
XkLi 0:c546b51ecf0b 86 0xff, //FDL_Prox_F
XkLi 0:c546b51ecf0b 87 0x00, //NHD_Prox_T
XkLi 0:c546b51ecf0b 88 0x00, //NCL_Prox_T
XkLi 0:c546b51ecf0b 89 0x00 //NFD_Prox_T
XkLi 0:c546b51ecf0b 90 };
XkLi 0:c546b51ecf0b 91 writeMany(MHDPROXR,proximitySettings,11);
XkLi 0:c546b51ecf0b 92
XkLi 0:c546b51ecf0b 93 unsigned char proxThresh[] = {
XkLi 0:c546b51ecf0b 94 PROX_THR_T, // Touch Threshold
XkLi 0:c546b51ecf0b 95 PROX_THR_R // Release Threshold
XkLi 0:c546b51ecf0b 96 };
XkLi 0:c546b51ecf0b 97 writeMany(EPROXTTH,proxThresh,2);
XkLi 0:c546b51ecf0b 98
XkLi 0:c546b51ecf0b 99 this->write(FIL_CFG,0x04);
XkLi 0:c546b51ecf0b 100
XkLi 0:c546b51ecf0b 101 // Set the electrode config to transition to active mode
XkLi 0:c546b51ecf0b 102 this->write(ELE_CFG,0x0c);
XkLi 0:c546b51ecf0b 103 }
XkLi 0:c546b51ecf0b 104
XkLi 0:c546b51ecf0b 105 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
XkLi 0:c546b51ecf0b 106
XkLi 0:c546b51ecf0b 107 if(electrode > 11) return;
XkLi 0:c546b51ecf0b 108
XkLi 0:c546b51ecf0b 109 // Get the current mode
XkLi 0:c546b51ecf0b 110 unsigned char mode = this->read(ELE_CFG);
XkLi 0:c546b51ecf0b 111
XkLi 0:c546b51ecf0b 112 // Put the MPR into setup mode
XkLi 0:c546b51ecf0b 113 this->write(ELE_CFG,0x00);
XkLi 0:c546b51ecf0b 114
XkLi 0:c546b51ecf0b 115 // Write the new threshold
XkLi 0:c546b51ecf0b 116 this->write((ELE0_T+(electrode*2)), touch);
XkLi 0:c546b51ecf0b 117 this->write((ELE0_T+(electrode*2)+1), release);
XkLi 0:c546b51ecf0b 118
XkLi 0:c546b51ecf0b 119 //Restore the operating mode
XkLi 0:c546b51ecf0b 120 this->write(ELE_CFG, mode);
XkLi 0:c546b51ecf0b 121 }
XkLi 0:c546b51ecf0b 122
XkLi 0:c546b51ecf0b 123
XkLi 0:c546b51ecf0b 124 unsigned char Mpr121::read(int key){
XkLi 0:c546b51ecf0b 125
XkLi 0:c546b51ecf0b 126 unsigned char data[2];
XkLi 0:c546b51ecf0b 127
XkLi 0:c546b51ecf0b 128 //Start the command
XkLi 0:c546b51ecf0b 129 i2c->start();
XkLi 0:c546b51ecf0b 130
XkLi 0:c546b51ecf0b 131 // Address the target (Write mode)
XkLi 0:c546b51ecf0b 132 int ack1= i2c->write(address);
XkLi 0:c546b51ecf0b 133
XkLi 0:c546b51ecf0b 134 // Set the register key to read
XkLi 0:c546b51ecf0b 135 int ack2 = i2c->write(key);
XkLi 0:c546b51ecf0b 136
XkLi 0:c546b51ecf0b 137 // Re-start for read of data
XkLi 0:c546b51ecf0b 138 i2c->start();
XkLi 0:c546b51ecf0b 139
XkLi 0:c546b51ecf0b 140 // Re-send the target address in read mode
XkLi 0:c546b51ecf0b 141 int ack3 = i2c->write(address+1);
XkLi 0:c546b51ecf0b 142
XkLi 0:c546b51ecf0b 143 // Read in the result
XkLi 0:c546b51ecf0b 144 data[0] = i2c->read(0);
XkLi 0:c546b51ecf0b 145
XkLi 0:c546b51ecf0b 146 // Reset the bus
XkLi 0:c546b51ecf0b 147 i2c->stop();
XkLi 0:c546b51ecf0b 148
XkLi 0:c546b51ecf0b 149 return data[0];
XkLi 0:c546b51ecf0b 150 }
XkLi 0:c546b51ecf0b 151
XkLi 0:c546b51ecf0b 152
XkLi 0:c546b51ecf0b 153 int Mpr121::write(int key, unsigned char value){
XkLi 0:c546b51ecf0b 154
XkLi 0:c546b51ecf0b 155 //Start the command
XkLi 0:c546b51ecf0b 156 i2c->start();
XkLi 0:c546b51ecf0b 157
XkLi 0:c546b51ecf0b 158 // Address the target (Write mode)
XkLi 0:c546b51ecf0b 159 int ack1= i2c->write(address);
XkLi 0:c546b51ecf0b 160
XkLi 0:c546b51ecf0b 161 // Set the register key to write
XkLi 0:c546b51ecf0b 162 int ack2 = i2c->write(key);
XkLi 0:c546b51ecf0b 163
XkLi 0:c546b51ecf0b 164 // Read in the result
XkLi 0:c546b51ecf0b 165 int ack3 = i2c->write(value);
XkLi 0:c546b51ecf0b 166
XkLi 0:c546b51ecf0b 167 // Reset the bus
XkLi 0:c546b51ecf0b 168 i2c->stop();
XkLi 0:c546b51ecf0b 169
XkLi 0:c546b51ecf0b 170 return (ack1+ack2+ack3)-3;
XkLi 0:c546b51ecf0b 171 }
XkLi 0:c546b51ecf0b 172
XkLi 0:c546b51ecf0b 173
XkLi 0:c546b51ecf0b 174 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
XkLi 0:c546b51ecf0b 175 //Start the command
XkLi 0:c546b51ecf0b 176 i2c->start();
XkLi 0:c546b51ecf0b 177
XkLi 0:c546b51ecf0b 178 // Address the target (Write mode)
XkLi 0:c546b51ecf0b 179 int ack= i2c->write(address);
XkLi 0:c546b51ecf0b 180 if(ack!=1){
XkLi 0:c546b51ecf0b 181 return -1;
XkLi 0:c546b51ecf0b 182 }
XkLi 0:c546b51ecf0b 183
XkLi 0:c546b51ecf0b 184 // Set the register key to write
XkLi 0:c546b51ecf0b 185 ack = i2c->write(start);
XkLi 0:c546b51ecf0b 186 if(ack!=1){
XkLi 0:c546b51ecf0b 187 return -1;
XkLi 0:c546b51ecf0b 188 }
XkLi 0:c546b51ecf0b 189
XkLi 0:c546b51ecf0b 190 // Write the date set
XkLi 0:c546b51ecf0b 191 int count = 0;
XkLi 0:c546b51ecf0b 192 while(ack==1 && (count < length)){
XkLi 0:c546b51ecf0b 193 ack = i2c->write(dataSet[count]);
XkLi 0:c546b51ecf0b 194 count++;
XkLi 0:c546b51ecf0b 195 }
XkLi 0:c546b51ecf0b 196 // Stop the cmd
XkLi 0:c546b51ecf0b 197 i2c->stop();
XkLi 0:c546b51ecf0b 198
XkLi 0:c546b51ecf0b 199 return count;
XkLi 0:c546b51ecf0b 200 }
XkLi 0:c546b51ecf0b 201
XkLi 0:c546b51ecf0b 202
XkLi 0:c546b51ecf0b 203 bool Mpr121::getProximityMode(){
XkLi 0:c546b51ecf0b 204 if(this->read(ELE_CFG) > 0x0c)
XkLi 0:c546b51ecf0b 205 return true;
XkLi 0:c546b51ecf0b 206 else
XkLi 0:c546b51ecf0b 207 return false;
XkLi 0:c546b51ecf0b 208 }
XkLi 0:c546b51ecf0b 209
XkLi 0:c546b51ecf0b 210 void Mpr121::setProximityMode(bool mode){
XkLi 0:c546b51ecf0b 211 this->write(ELE_CFG,0x00);
XkLi 0:c546b51ecf0b 212 if(mode){
XkLi 0:c546b51ecf0b 213 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
XkLi 0:c546b51ecf0b 214 } else {
XkLi 0:c546b51ecf0b 215 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
XkLi 0:c546b51ecf0b 216 }
XkLi 0:c546b51ecf0b 217 }
XkLi 0:c546b51ecf0b 218
XkLi 0:c546b51ecf0b 219
XkLi 0:c546b51ecf0b 220 int Mpr121::readTouchData(){
XkLi 0:c546b51ecf0b 221 return this->read(0x00);
XkLi 0:c546b51ecf0b 222 }