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/*
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Copyright (c) 2011 Anthony Buckton (abuckton [at] blackink [dot} net {dot} au)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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Parts written by Jim Lindblom of Sparkfun
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Ported to mbed by A.Buckton, Feb 2011
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*/
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#ifndef MPR121_H
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#define MPR121_H
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//using namespace std;
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class Mpr121
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{
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public:
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// i2c Addresses, bit-shifted
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enum Address { ADD_VSS = 0xb4,// ADD->VSS = 0x5a <-wiring on Sparkfun board
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ADD_VDD = 0xb6,// ADD->VDD = 0x5b
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ADD_SCL = 0xb8,// ADD->SDA = 0x5c
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ADD_SDA = 0xba // ADD->SCL = 0x5d
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};
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// Real initialiser, takes the i2c address of the device.
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Mpr121(I2C *i2c, Address i2cAddress);
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bool getProximityMode();
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void setProximityMode(bool mode);
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int readTouchData();
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unsigned char read(int key);
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int write(int address, unsigned char value);
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int writeMany(int start, unsigned char* dataSet, int length);
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void setElectrodeThreshold(int electrodeId, unsigned char touchThreshold, unsigned char releaseThreshold);
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protected:
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// Configures the MPR with standard settings. This is permitted to be overwritten by sub-classes.
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void configureSettings();
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private:
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// The I2C bus instance.
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I2C *i2c;
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// i2c address of this mpr121
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Address address;
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};
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// MPR121 Register Defines
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#define MHD_R 0x2B
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#define NHD_R 0x2C
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#define NCL_R 0x2D
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#define FDL_R 0x2E
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#define MHD_F 0x2F
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#define NHD_F 0x30
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#define NCL_F 0x31
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#define FDL_F 0x32
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#define NHDT 0x33
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#define NCLT 0x34
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#define FDLT 0x35
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// Proximity sensing controls
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#define MHDPROXR 0x36
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#define NHDPROXR 0x37
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#define NCLPROXR 0x38
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#define FDLPROXR 0x39
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#define MHDPROXF 0x3A
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#define NHDPROXF 0x3B
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#define NCLPROXF 0x3C
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#define FDLPROXF 0x3D
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#define NHDPROXT 0x3E
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#define NCLPROXT 0x3F
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#define FDLPROXT 0x40
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// Electrode Touch/Release thresholds
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#define ELE0_T 0x41
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#define ELE0_R 0x42
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#define ELE1_T 0x43
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#define ELE1_R 0x44
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#define ELE2_T 0x45
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#define ELE2_R 0x46
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#define ELE3_T 0x47
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#define ELE3_R 0x48
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#define ELE4_T 0x49
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#define ELE4_R 0x4A
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#define ELE5_T 0x4B
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#define ELE5_R 0x4C
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#define ELE6_T 0x4D
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#define ELE6_R 0x4E
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#define ELE7_T 0x4F
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#define ELE7_R 0x50
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#define ELE8_T 0x51
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#define ELE8_R 0x52
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#define ELE9_T 0x53
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#define ELE9_R 0x54
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#define ELE10_T 0x55
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#define ELE10_R 0x56
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#define ELE11_T 0x57
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#define ELE11_R 0x58
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// Proximity Touch/Release thresholds
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#define EPROXTTH 0x59
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#define EPROXRTH 0x5A
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// Debounce configuration
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#define DEB_CFG 0x5B
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// AFE- Analogue Front End configuration
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#define AFE_CFG 0x5C
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// Filter configuration
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#define FIL_CFG 0x5D
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// Electrode configuration - transistions to "active mode"
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#define ELE_CFG 0x5E
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#define GPIO_CTRL0 0x73
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#define GPIO_CTRL1 0x74
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#define GPIO_DATA 0x75
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#define GPIO_DIR 0x76
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#define GPIO_EN 0x77
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#define GPIO_SET 0x78
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#define GPIO_CLEAR 0x79
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#define GPIO_TOGGLE 0x7A
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// Auto configration registers
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#define AUTO_CFG_0 0x7B
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#define AUTO_CFG_U 0x7D
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#define AUTO_CFG_L 0x7E
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#define AUTO_CFG_T 0x7F
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// Threshold defaults
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// Electrode touch threshold
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#define E_THR_T 0x0F
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150
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// Electrode release threshold
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#define E_THR_R 0x0A
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152
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// Prox touch threshold
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#define PROX_THR_T 0x02
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// Prox release threshold
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#define PROX_THR_R 0x02
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156
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#endif
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jim hamblen
Sparkfun Touch Keypad