Charith Dassanayake / CPPToPigpio - Testing Programs

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MPR121/MPR121.cc@0:9a49249d42b3, 2017-12-13 (annotated)

Committer:
Charith Dassanayake
Date:
Wed Dec 13 00:06:47 2017 -0500
Revision:
0:9a49249d42b3
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Charith Dassanayake 0:9a49249d42b3 1 #ifndef CPP_TO_PIGPIO_I2C_HEADER
Charith Dassanayake 0:9a49249d42b3 2 #include <CPPToPigpio.h>
Charith Dassanayake 0:9a49249d42b3 3 #endif
Charith Dassanayake 0:9a49249d42b3 4 #include <sstream>
Charith Dassanayake 0:9a49249d42b3 5 #include <string>
Charith Dassanayake 0:9a49249d42b3 6 #include <list>
Charith Dassanayake 0:9a49249d42b3 7
Charith Dassanayake 0:9a49249d42b3 8 #include "MPR121.h"
Charith Dassanayake 0:9a49249d42b3 9 Mpr121::Mpr121(CPPToPigpio::I2C *i2c, Address i2cAddress)
Charith Dassanayake 0:9a49249d42b3 10 {
Charith Dassanayake 0:9a49249d42b3 11 this->i2c = i2c;
Charith Dassanayake 0:9a49249d42b3 12
Charith Dassanayake 0:9a49249d42b3 13 address = i2cAddress;
Charith Dassanayake 0:9a49249d42b3 14
Charith Dassanayake 0:9a49249d42b3 15 // Configure the MPR121 settings to default
Charith Dassanayake 0:9a49249d42b3 16 this->configureSettings();
Charith Dassanayake 0:9a49249d42b3 17 }
Charith Dassanayake 0:9a49249d42b3 18
Charith Dassanayake 0:9a49249d42b3 19
Charith Dassanayake 0:9a49249d42b3 20 void Mpr121::configureSettings()
Charith Dassanayake 0:9a49249d42b3 21 {
Charith Dassanayake 0:9a49249d42b3 22 // Put the MPR into setup mode
Charith Dassanayake 0:9a49249d42b3 23 this->write(ELE_CFG,0x00);
Charith Dassanayake 0:9a49249d42b3 24
Charith Dassanayake 0:9a49249d42b3 25 // Electrode filters for when data is > baseline
Charith Dassanayake 0:9a49249d42b3 26 unsigned char gtBaseline[] = {
Charith Dassanayake 0:9a49249d42b3 27 0x01, //MHD_R
Charith Dassanayake 0:9a49249d42b3 28 0x01, //NHD_R
Charith Dassanayake 0:9a49249d42b3 29 0x00, //NCL_R
Charith Dassanayake 0:9a49249d42b3 30 0x00 //FDL_R
Charith Dassanayake 0:9a49249d42b3 31 };
Charith Dassanayake 0:9a49249d42b3 32
Charith Dassanayake 0:9a49249d42b3 33 writeMany(MHD_R,gtBaseline,4);
Charith Dassanayake 0:9a49249d42b3 34
Charith Dassanayake 0:9a49249d42b3 35 // Electrode filters for when data is < baseline
Charith Dassanayake 0:9a49249d42b3 36 unsigned char ltBaseline[] = {
Charith Dassanayake 0:9a49249d42b3 37 0x01, //MHD_F
Charith Dassanayake 0:9a49249d42b3 38 0x01, //NHD_F
Charith Dassanayake 0:9a49249d42b3 39 0xFF, //NCL_F
Charith Dassanayake 0:9a49249d42b3 40 0x02 //FDL_F
Charith Dassanayake 0:9a49249d42b3 41 };
Charith Dassanayake 0:9a49249d42b3 42
Charith Dassanayake 0:9a49249d42b3 43 writeMany(MHD_F,ltBaseline,4);
Charith Dassanayake 0:9a49249d42b3 44
Charith Dassanayake 0:9a49249d42b3 45 // Electrode touch and release thresholds
Charith Dassanayake 0:9a49249d42b3 46 unsigned char electrodeThresholds[] = {
Charith Dassanayake 0:9a49249d42b3 47 E_THR_T, // Touch Threshhold
Charith Dassanayake 0:9a49249d42b3 48 E_THR_R // Release Threshold
Charith Dassanayake 0:9a49249d42b3 49 };
Charith Dassanayake 0:9a49249d42b3 50
Charith Dassanayake 0:9a49249d42b3 51 for(int i=0; i<12; i++){
Charith Dassanayake 0:9a49249d42b3 52 int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2);
Charith Dassanayake 0:9a49249d42b3 53 }
Charith Dassanayake 0:9a49249d42b3 54
Charith Dassanayake 0:9a49249d42b3 55 // Proximity Settings
Charith Dassanayake 0:9a49249d42b3 56 unsigned char proximitySettings[] = {
Charith Dassanayake 0:9a49249d42b3 57 0xff, //MHD_Prox_R
Charith Dassanayake 0:9a49249d42b3 58 0xff, //NHD_Prox_R
Charith Dassanayake 0:9a49249d42b3 59 0x00, //NCL_Prox_R
Charith Dassanayake 0:9a49249d42b3 60 0x00, //FDL_Prox_R
Charith Dassanayake 0:9a49249d42b3 61 0x01, //MHD_Prox_F
Charith Dassanayake 0:9a49249d42b3 62 0x01, //NHD_Prox_F
Charith Dassanayake 0:9a49249d42b3 63 0xFF, //NCL_Prox_F
Charith Dassanayake 0:9a49249d42b3 64 0xff, //FDL_Prox_F
Charith Dassanayake 0:9a49249d42b3 65 0x00, //NHD_Prox_T
Charith Dassanayake 0:9a49249d42b3 66 0x00, //NCL_Prox_T
Charith Dassanayake 0:9a49249d42b3 67 0x00 //NFD_Prox_T
Charith Dassanayake 0:9a49249d42b3 68 };
Charith Dassanayake 0:9a49249d42b3 69 writeMany(MHDPROXR,proximitySettings,11);
Charith Dassanayake 0:9a49249d42b3 70
Charith Dassanayake 0:9a49249d42b3 71 unsigned char proxThresh[] = {
Charith Dassanayake 0:9a49249d42b3 72 PROX_THR_T, // Touch Threshold
Charith Dassanayake 0:9a49249d42b3 73 PROX_THR_R // Release Threshold
Charith Dassanayake 0:9a49249d42b3 74 };
Charith Dassanayake 0:9a49249d42b3 75 writeMany(EPROXTTH,proxThresh,2);
Charith Dassanayake 0:9a49249d42b3 76
Charith Dassanayake 0:9a49249d42b3 77 this->write(FIL_CFG,0x04);
Charith Dassanayake 0:9a49249d42b3 78
Charith Dassanayake 0:9a49249d42b3 79 // Set the electrode config to transition to active mode
Charith Dassanayake 0:9a49249d42b3 80 this->write(ELE_CFG,0x0c);
Charith Dassanayake 0:9a49249d42b3 81 }
Charith Dassanayake 0:9a49249d42b3 82
Charith Dassanayake 0:9a49249d42b3 83 void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){
Charith Dassanayake 0:9a49249d42b3 84
Charith Dassanayake 0:9a49249d42b3 85 if(electrode > 11) return;
Charith Dassanayake 0:9a49249d42b3 86
Charith Dassanayake 0:9a49249d42b3 87 // Get the current mode
Charith Dassanayake 0:9a49249d42b3 88 unsigned char mode = this->read(ELE_CFG);
Charith Dassanayake 0:9a49249d42b3 89
Charith Dassanayake 0:9a49249d42b3 90 // Put the MPR into setup mode
Charith Dassanayake 0:9a49249d42b3 91 this->write(ELE_CFG,0x00);
Charith Dassanayake 0:9a49249d42b3 92
Charith Dassanayake 0:9a49249d42b3 93 // Write the new threshold
Charith Dassanayake 0:9a49249d42b3 94 this->write((ELE0_T+(electrode*2)), touch);
Charith Dassanayake 0:9a49249d42b3 95 this->write((ELE0_T+(electrode*2)+1), release);
Charith Dassanayake 0:9a49249d42b3 96
Charith Dassanayake 0:9a49249d42b3 97 //Restore the operating mode
Charith Dassanayake 0:9a49249d42b3 98 this->write(ELE_CFG, mode);
Charith Dassanayake 0:9a49249d42b3 99 }
Charith Dassanayake 0:9a49249d42b3 100
Charith Dassanayake 0:9a49249d42b3 101
Charith Dassanayake 0:9a49249d42b3 102 unsigned char Mpr121::read(int key){
Charith Dassanayake 0:9a49249d42b3 103
Charith Dassanayake 0:9a49249d42b3 104 unsigned int data[2];
Charith Dassanayake 0:9a49249d42b3 105 char out[2]={0};
Charith Dassanayake 0:9a49249d42b3 106 char cmd[] = {CPPToPigpio::I2C::Start, CPPToPigpio::I2C::Addr, address, CPPToPigpio::I2C::Write,
Charith Dassanayake 0:9a49249d42b3 107 0x01, key, CPPToPigpio::I2C::Start, CPPToPigpio::I2C::Read,0x02, CPPToPigpio::I2C::Stop,
Charith Dassanayake 0:9a49249d42b3 108 CPPToPigpio::I2C::End};
Charith Dassanayake 0:9a49249d42b3 109 int ack = i2c->bang(cmd, 11, out, 2, false);
Charith Dassanayake 0:9a49249d42b3 110 //printf("ack_read: %d", ack);
Charith Dassanayake 0:9a49249d42b3 111 //Start the command
Charith Dassanayake 0:9a49249d42b3 112 /*i2c->start();
Charith Dassanayake 0:9a49249d42b3 113
Charith Dassanayake 0:9a49249d42b3 114 // Address the target (Write mode)
Charith Dassanayake 0:9a49249d42b3 115 int ack1= i2c->write(address);
Charith Dassanayake 0:9a49249d42b3 116
Charith Dassanayake 0:9a49249d42b3 117 // Set the register key to read
Charith Dassanayake 0:9a49249d42b3 118 int ack2 = i2c->write(key);
Charith Dassanayake 0:9a49249d42b3 119
Charith Dassanayake 0:9a49249d42b3 120 // Re-start for read of data
Charith Dassanayake 0:9a49249d42b3 121 i2c->start();
Charith Dassanayake 0:9a49249d42b3 122
Charith Dassanayake 0:9a49249d42b3 123 // Re-send the target address in read mode
Charith Dassanayake 0:9a49249d42b3 124 int ack3 = i2c->write(address+1);
Charith Dassanayake 0:9a49249d42b3 125
Charith Dassanayake 0:9a49249d42b3 126 // Read in the result
Charith Dassanayake 0:9a49249d42b3 127 data[0] = i2c->read(0);
Charith Dassanayake 0:9a49249d42b3 128
Charith Dassanayake 0:9a49249d42b3 129 // Reset the bus
Charith Dassanayake 0:9a49249d42b3 130 i2c->stop();*/
Charith Dassanayake 0:9a49249d42b3 131 data[0] = out[0];
Charith Dassanayake 0:9a49249d42b3 132 return (unsigned char)data[0];
Charith Dassanayake 0:9a49249d42b3 133 }
Charith Dassanayake 0:9a49249d42b3 134
Charith Dassanayake 0:9a49249d42b3 135
Charith Dassanayake 0:9a49249d42b3 136 int Mpr121::write(int key, unsigned char value){
Charith Dassanayake 0:9a49249d42b3 137
Charith Dassanayake 0:9a49249d42b3 138 char out[1]={0};
Charith Dassanayake 0:9a49249d42b3 139 char keyc = static_cast<char>(key);
Charith Dassanayake 0:9a49249d42b3 140 char valc = static_cast<char>(value);
Charith Dassanayake 0:9a49249d42b3 141 char cmd[] = {CPPToPigpio::I2C::Start, CPPToPigpio::I2C::Addr, address, CPPToPigpio::I2C::Write,
Charith Dassanayake 0:9a49249d42b3 142 0x02, keyc, valc, CPPToPigpio::I2C::Stop, CPPToPigpio::I2C::End};
Charith Dassanayake 0:9a49249d42b3 143 int ack = i2c->bang(cmd, 9, out, 1, false);
Charith Dassanayake 0:9a49249d42b3 144 //printf("ack_write: %d", ack);
Charith Dassanayake 0:9a49249d42b3 145 //Start the command
Charith Dassanayake 0:9a49249d42b3 146 /*i2c->start();
Charith Dassanayake 0:9a49249d42b3 147
Charith Dassanayake 0:9a49249d42b3 148 // Address the target (Write mode)
Charith Dassanayake 0:9a49249d42b3 149 int ack1= i2c->write(address);
Charith Dassanayake 0:9a49249d42b3 150
Charith Dassanayake 0:9a49249d42b3 151 // Set the register key to write
Charith Dassanayake 0:9a49249d42b3 152 int ack2 = i2c->write(key);
Charith Dassanayake 0:9a49249d42b3 153
Charith Dassanayake 0:9a49249d42b3 154 // Read in the result
Charith Dassanayake 0:9a49249d42b3 155 int ack3 = i2c->write(value);
Charith Dassanayake 0:9a49249d42b3 156
Charith Dassanayake 0:9a49249d42b3 157 // Reset the bus
Charith Dassanayake 0:9a49249d42b3 158 i2c->stop();*/
Charith Dassanayake 0:9a49249d42b3 159
Charith Dassanayake 0:9a49249d42b3 160 return ack-1;
Charith Dassanayake 0:9a49249d42b3 161 }
Charith Dassanayake 0:9a49249d42b3 162
Charith Dassanayake 0:9a49249d42b3 163
Charith Dassanayake 0:9a49249d42b3 164 int Mpr121::writeMany(int start, unsigned char* dataSet, int length){
Charith Dassanayake 0:9a49249d42b3 165 //Start the command
Charith Dassanayake 0:9a49249d42b3 166 /*i2c->start();
Charith Dassanayake 0:9a49249d42b3 167
Charith Dassanayake 0:9a49249d42b3 168 // Address the target (Write mode)
Charith Dassanayake 0:9a49249d42b3 169 int ack= i2c->write(address);
Charith Dassanayake 0:9a49249d42b3 170 if(ack!=1){
Charith Dassanayake 0:9a49249d42b3 171 return -1;
Charith Dassanayake 0:9a49249d42b3 172 }
Charith Dassanayake 0:9a49249d42b3 173
Charith Dassanayake 0:9a49249d42b3 174 // Set the register key to write
Charith Dassanayake 0:9a49249d42b3 175 ack = i2c->write(start);
Charith Dassanayake 0:9a49249d42b3 176 if(ack!=1){
Charith Dassanayake 0:9a49249d42b3 177 return -1;
Charith Dassanayake 0:9a49249d42b3 178 }
Charith Dassanayake 0:9a49249d42b3 179
Charith Dassanayake 0:9a49249d42b3 180 // Write the date set
Charith Dassanayake 0:9a49249d42b3 181 int count = 0;
Charith Dassanayake 0:9a49249d42b3 182 while(ack==1 && (count < length)){
Charith Dassanayake 0:9a49249d42b3 183 ack = i2c->write(dataSet[count]);
Charith Dassanayake 0:9a49249d42b3 184 count++;
Charith Dassanayake 0:9a49249d42b3 185 }
Charith Dassanayake 0:9a49249d42b3 186 // Stop the cmd
Charith Dassanayake 0:9a49249d42b3 187 i2c->stop();*/
Charith Dassanayake 0:9a49249d42b3 188
Charith Dassanayake 0:9a49249d42b3 189 char datasetb[length+1] = {0};
Charith Dassanayake 0:9a49249d42b3 190 datasetb[0] = start;
Charith Dassanayake 0:9a49249d42b3 191 for (int i=0; i<length; i++){
Charith Dassanayake 0:9a49249d42b3 192 datasetb[i+1]=static_cast<char>(dataSet[i]);
Charith Dassanayake 0:9a49249d42b3 193 //printf("a: %x, b :%x\n", dataSet[i], datasetb[i+1]);
Charith Dassanayake 0:9a49249d42b3 194 }
Charith Dassanayake 0:9a49249d42b3 195 //printf("here\n");
Charith Dassanayake 0:9a49249d42b3 196 int count = i2c->write(address, datasetb, length+1, false);
Charith Dassanayake 0:9a49249d42b3 197
Charith Dassanayake 0:9a49249d42b3 198
Charith Dassanayake 0:9a49249d42b3 199
Charith Dassanayake 0:9a49249d42b3 200 return count;
Charith Dassanayake 0:9a49249d42b3 201 }
Charith Dassanayake 0:9a49249d42b3 202
Charith Dassanayake 0:9a49249d42b3 203
Charith Dassanayake 0:9a49249d42b3 204 bool Mpr121::getProximityMode(){
Charith Dassanayake 0:9a49249d42b3 205 if(this->read(ELE_CFG) > 0x0c)
Charith Dassanayake 0:9a49249d42b3 206 return true;
Charith Dassanayake 0:9a49249d42b3 207 else
Charith Dassanayake 0:9a49249d42b3 208 return false;
Charith Dassanayake 0:9a49249d42b3 209 }
Charith Dassanayake 0:9a49249d42b3 210
Charith Dassanayake 0:9a49249d42b3 211 void Mpr121::setProximityMode(bool mode){
Charith Dassanayake 0:9a49249d42b3 212 this->write(ELE_CFG,0x00);
Charith Dassanayake 0:9a49249d42b3 213 if(mode){
Charith Dassanayake 0:9a49249d42b3 214 this->write(ELE_CFG,0x30); //Sense proximity from ALL pads
Charith Dassanayake 0:9a49249d42b3 215 } else {
Charith Dassanayake 0:9a49249d42b3 216 this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active.
Charith Dassanayake 0:9a49249d42b3 217 }
Charith Dassanayake 0:9a49249d42b3 218 }
Charith Dassanayake 0:9a49249d42b3 219
Charith Dassanayake 0:9a49249d42b3 220
Charith Dassanayake 0:9a49249d42b3 221 int Mpr121::readTouchData(){
Charith Dassanayake 0:9a49249d42b3 222 return this->read(0x00);
Charith Dassanayake 0:9a49249d42b3 223 }