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annotate core/I2c_TouchKey.cpp @ 456:aa3f38d8a9b6 prerelease

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using relative links in examples/core
author Giulio Moro <giuliomoro@yahoo.it>
date Mon, 20 Jun 2016 01:10:16 +0100
parents 361d0c2335cf
children
rev   line source
andrewm@0 1 /*
andrewm@0 2 * I2c_TouchKey.cpp
andrewm@0 3 *
andrewm@0 4 * Created on: Oct 14, 2013
andrewm@0 5 * Author: Victor Zappi
andrewm@0 6 */
andrewm@0 7
andrewm@0 8
andrewm@0 9
andrewm@0 10 #include "I2c_TouchKey.h"
andrewm@0 11
andrewm@0 12 #undef DEBUG_I2C_TOUCHKEY
andrewm@0 13
andrewm@0 14 I2c_TouchKey::I2c_TouchKey()
andrewm@0 15 {
andrewm@0 16 isReady = false;
andrewm@15 17 sensorType = kSensorTypeTouchKey;
andrewm@0 18 touchCount = 0;
andrewm@0 19 sliderSize[0] = sliderSize[1] = sliderSize[2] = -1;
andrewm@0 20 sliderPosition[0] = sliderPosition[1] = sliderPosition[2] = -1;
andrewm@0 21 sliderPositionH = -1;
andrewm@0 22 }
andrewm@0 23
andrewm@15 24 int I2c_TouchKey::initTouchKey(int sensorTypeToUse)
andrewm@0 25 {
andrewm@15 26 sensorType = sensorTypeToUse;
andrewm@15 27 if(sensorType > 2 || sensorType < 0)
andrewm@15 28 sensorType = 2;
andrewm@15 29
andrewm@15 30 numBytesToRead = kSensorBytes[sensorType];
andrewm@0 31
andrewm@0 32 char buf[3] = { 0x00, 0x01, 0x00 }; // code for centroid mode
andrewm@0 33 if(write(i2C_file, buf, 3) !=3)
andrewm@0 34 {
andrewm@0 35 cout << "Failed to set TouchKey in \"Centroid Mode\" " << endl;
andrewm@0 36 return 1;
andrewm@0 37 }
andrewm@0 38
andrewm@0 39 usleep(5000); // need to give TouchKey enough time to process command
andrewm@0 40
andrewm@0 41 char buf4[4] = { 0x00, 0x07, 0x00, 0x64}; // code for change minimum touch area
andrewm@0 42 if(write(i2C_file, buf4, 4) !=4)
andrewm@0 43 {
andrewm@0 44 cout << "Failed to set TouchKey minimum touch size" << endl;
andrewm@0 45 return 1;
andrewm@0 46 }
andrewm@0 47
andrewm@0 48 usleep(5000); // need to give TouchKey enough time to process command
andrewm@0 49
andrewm@15 50 if(sensorType == kSensorTypeDBox2)
andrewm@15 51 buf[0] = 0x04; // code for data collection
andrewm@15 52 else
andrewm@15 53 buf[0] = 0x06; // code for data collection
andrewm@15 54
andrewm@0 55 if(write(i2C_file, buf, 1) !=1)
andrewm@0 56 {
andrewm@0 57 cout << "Failed to prepare data collection " << endl;
andrewm@0 58 return 2;
andrewm@0 59 }
andrewm@0 60
andrewm@0 61 usleep(5000); // need to give TouchKey enough time to process command
andrewm@0 62
andrewm@0 63 isReady = true;
andrewm@0 64
andrewm@0 65 return 0;
andrewm@0 66 }
andrewm@0 67
andrewm@0 68
andrewm@0 69 int I2c_TouchKey::readI2C()
andrewm@0 70 {
andrewm@0 71 bytesRead = read(i2C_file, dataBuffer, numBytesToRead);
andrewm@0 72 if (bytesRead != numBytesToRead)
andrewm@0 73 {
andrewm@0 74 cout << "Failure to read Byte Stream" << endl;
andrewm@0 75 return 2;
andrewm@0 76 }
andrewm@0 77 /*cout << NUM_BYTES << " bytes read" << endl;
andrewm@0 78 for(int j=0; j<9; j++)
andrewm@0 79 cout << "\t" << (int)dataBuffer[j];
andrewm@0 80 cout << endl;
andrewm@0 81 */
andrewm@0 82
andrewm@0 83 touchCount = 0;
andrewm@0 84
andrewm@0 85 // Old TouchKeys sensors have 3 touch locations plus horizontal positions
andrewm@0 86 // New D-Box sensors have 5 touch locations but no horizontal position
andrewm@15 87 // Later D-Box sensors have same data in a different format
andrewm@15 88 if(sensorType == kSensorTypeDBox1) {
andrewm@15 89 rawSliderPosition[0] = (((dataBuffer[0] & 0xF0) << 4) + dataBuffer[1]);
andrewm@15 90 rawSliderPosition[1] = (((dataBuffer[0] & 0x0F) << 8) + dataBuffer[2]);
andrewm@15 91 rawSliderPosition[2] = (((dataBuffer[3] & 0xF0) << 4) + dataBuffer[4]);
andrewm@0 92 rawSliderPosition[3] = (((dataBuffer[5] & 0xF0) << 4) + dataBuffer[6]);
andrewm@0 93 rawSliderPosition[4] = (((dataBuffer[5] & 0x0F) << 8) + dataBuffer[7]);
andrewm@0 94 rawSliderPositionH = 0x0FFF;
andrewm@0 95 }
andrewm@15 96 else if(sensorType == kSensorTypeDBox2) {
andrewm@15 97 rawSliderPosition[0] = ((dataBuffer[0] << 8) + dataBuffer[1]) & 0x0FFF;
andrewm@15 98 rawSliderPosition[1] = ((dataBuffer[2] << 8) + dataBuffer[3]) & 0x0FFF;
andrewm@15 99 rawSliderPosition[2] = ((dataBuffer[4] << 8) + dataBuffer[5]) & 0x0FFF;
andrewm@15 100 rawSliderPosition[3] = ((dataBuffer[6] << 8) + dataBuffer[7]) & 0x0FFF;
andrewm@15 101 rawSliderPosition[4] = ((dataBuffer[8] << 8) + dataBuffer[9]) & 0x0FFF;
andrewm@15 102 rawSliderPositionH = 0x0FFF;
andrewm@15 103 }
andrewm@15 104 else {
andrewm@15 105 rawSliderPosition[0] = (((dataBuffer[0] & 0xF0) << 4) + dataBuffer[1]);
andrewm@15 106 rawSliderPosition[1] = (((dataBuffer[0] & 0x0F) << 8) + dataBuffer[2]);
andrewm@15 107 rawSliderPosition[2] = (((dataBuffer[3] & 0xF0) << 4) + dataBuffer[4]);
andrewm@0 108 rawSliderPosition[3] = 0x0FFF;
andrewm@0 109 rawSliderPosition[4] = 0x0FFF;
andrewm@0 110 rawSliderPositionH = (((dataBuffer[3] & 0x0F) << 8) + dataBuffer[5]);
andrewm@0 111 }
andrewm@0 112
andrewm@0 113 for(int i = 0; i < 5; i++)
andrewm@0 114 {
andrewm@0 115 if(rawSliderPosition[i] != 0x0FFF) // 0x0FFF means no touch
andrewm@0 116 {
andrewm@15 117 if(sensorType != kSensorTypeTouchKey)
andrewm@0 118 sliderPosition[i] = (float)rawSliderPosition[i] / 3200.0; // New sensors; 26 pads (128 * 25)
andrewm@0 119 else
andrewm@0 120 sliderPosition[i] = (float)rawSliderPosition[i] / 2432.0; // White keys, vertical (128 * 19)
andrewm@15 121
andrewm@15 122 if(sliderPosition[i] > 1.0)
andrewm@0 123 sliderPosition[i] = 1.0;
andrewm@15 124
andrewm@15 125 if(sensorType == kSensorTypeDBox2) {
andrewm@15 126 sliderSize[i] = (float)((dataBuffer[2*i + 10] << 8) + dataBuffer[2*i + 11]) / 5000.0;
andrewm@15 127 if(sliderSize[i] > 1.0)
andrewm@15 128 sliderSize[i] = 1.0;
andrewm@15 129 }
andrewm@15 130 else if(sensorType == kSensorTypeDBox1)
andrewm@0 131 sliderSize[i] = (float)dataBuffer[i + 8] / 255.0;
andrewm@0 132 else {
andrewm@0 133 if(i < 3)
andrewm@0 134 sliderSize[i] = (float)dataBuffer[i + 6] / 255.0;
andrewm@0 135 else
andrewm@0 136 sliderSize[i] = 0.0;
andrewm@0 137 }
andrewm@0 138 touchCount++;
andrewm@0 139 }
andrewm@0 140 else {
andrewm@0 141 sliderPosition[i] = -1.0;
andrewm@0 142 sliderSize[i] = 0.0;
andrewm@0 143 }
andrewm@0 144 }
andrewm@0 145
andrewm@0 146
andrewm@0 147
andrewm@0 148 if(rawSliderPositionH != 0x0FFF)
andrewm@0 149 {
andrewm@0 150 sliderPositionH = (float)rawSliderPositionH / 256.0; // White keys, horizontal (1 byte + 1 bit)
andrewm@0 151 }
andrewm@0 152 else
andrewm@0 153 sliderPositionH = -1.0;
andrewm@0 154
andrewm@0 155 #ifdef DEBUG_I2C_TOUCHKEY
andrewm@0 156 for(int i = 0; i < bytesRead; i++) {
andrewm@0 157 printf("%2X ", dataBuffer[i]);
andrewm@0 158 }
andrewm@0 159 cout << touchCount << " touches: ";
andrewm@0 160 for(int i = 0; i < touchCount; i++) {
andrewm@0 161 cout << "(" << sliderPosition[i] << ", " << sliderSize[i] << ") ";
andrewm@0 162 }
andrewm@0 163 cout << "H = " << sliderPositionH << endl;
andrewm@0 164 #endif
andrewm@0 165
andrewm@0 166 return 0;
andrewm@0 167 }
andrewm@0 168
andrewm@0 169
andrewm@0 170 I2c_TouchKey::~I2c_TouchKey()
andrewm@0 171 {}
andrewm@0 172