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StateChart defining behavior for FlippityFlappity project
Dependencies: MMA8451Q Multi_WS2811 TSI mbed
mpr121.cpp
- Committer:
- ryanfeng
- Date:
- 2015-04-06
- Revision:
- 0:e72b30045834
File content as of revision 0:e72b30045834:
/* Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include <mbed.h> #include <sstream> #include <string> #include <list> #include <mpr121.h> Mpr121::Mpr121(I2C *i2c, Address i2cAddress) { this->i2c = i2c; address = i2cAddress; // Configure the MPR121 settings to default this->configureSettings(); } void Mpr121::configureSettings() { // Put the MPR into setup mode this->write(ELE_CFG,0x00); // Electrode filters for when data is > baseline unsigned char gtBaseline[] = { 0x01, //MHD_R 0x01, //NHD_R 0x00, //NCL_R 0x00 //FDL_R }; writeMany(MHD_R,gtBaseline,4); // Electrode filters for when data is < baseline unsigned char ltBaseline[] = { 0x01, //MHD_F 0x01, //NHD_F 0xFF, //NCL_F 0x02 //FDL_F }; writeMany(MHD_F,ltBaseline,4); // Electrode touch and release thresholds unsigned char electrodeThresholds[] = { E_THR_T, // Touch Threshhold E_THR_R // Release Threshold }; for(int i=0; i<12; i++){ int result = writeMany((ELE0_T+(i*2)),electrodeThresholds,2); } // Proximity Settings unsigned char proximitySettings[] = { 0xff, //MHD_Prox_R 0xff, //NHD_Prox_R 0x00, //NCL_Prox_R 0x00, //FDL_Prox_R 0x01, //MHD_Prox_F 0x01, //NHD_Prox_F 0xFF, //NCL_Prox_F 0xff, //FDL_Prox_F 0x00, //NHD_Prox_T 0x00, //NCL_Prox_T 0x00 //NFD_Prox_T }; writeMany(MHDPROXR,proximitySettings,11); unsigned char proxThresh[] = { PROX_THR_T, // Touch Threshold PROX_THR_R // Release Threshold }; writeMany(EPROXTTH,proxThresh,2); this->write(FIL_CFG,0x04); // Set the electrode config to transition to active mode this->write(ELE_CFG,0x0c); } void Mpr121::setElectrodeThreshold(int electrode, unsigned char touch, unsigned char release){ if(electrode > 11) return; // Get the current mode unsigned char mode = this->read(ELE_CFG); // Put the MPR into setup mode this->write(ELE_CFG,0x00); // Write the new threshold this->write((ELE0_T+(electrode*2)), touch); this->write((ELE0_T+(electrode*2)+1), release); //Restore the operating mode this->write(ELE_CFG, mode); } unsigned char Mpr121::read(int key){ unsigned char data[2]; //Start the command i2c->start(); // Address the target (Write mode) int ack1= i2c->write(address); // Set the register key to read int ack2 = i2c->write(key); // Re-start for read of data i2c->start(); // Re-send the target address in read mode int ack3 = i2c->write(address+1); // Read in the result data[0] = i2c->read(0); // Reset the bus i2c->stop(); return data[0]; } int Mpr121::write(int key, unsigned char value){ //Start the command i2c->start(); // Address the target (Write mode) int ack1= i2c->write(address); // Set the register key to write int ack2 = i2c->write(key); // Read in the result int ack3 = i2c->write(value); // Reset the bus i2c->stop(); return (ack1+ack2+ack3)-3; } int Mpr121::writeMany(int start, unsigned char* dataSet, int length){ //Start the command i2c->start(); // Address the target (Write mode) int ack= i2c->write(address); if(ack!=1){ return -1; } // Set the register key to write ack = i2c->write(start); if(ack!=1){ return -1; } // Write the date set int count = 0; while(ack==1 && (count < length)){ ack = i2c->write(dataSet[count]); count++; } // Stop the cmd i2c->stop(); return count; } bool Mpr121::getProximityMode(){ if(this->read(ELE_CFG) > 0x0c) return true; else return false; } void Mpr121::setProximityMode(bool mode){ this->write(ELE_CFG,0x00); if(mode){ this->write(ELE_CFG,0x30); //Sense proximity from ALL pads } else { this->write(ELE_CFG,0x0c); //Sense touch, all 12 pads active. } } int Mpr121::readTouchData(){ return this->read(0x00); }