Witek Ewert / Mbed 2 deprecated KL46Z-Lab2_lodz

Sensor reporting over USB CDC

Dependencies:   MAG3110 MMA8451Q SLCD- TSI USBDevice mbed

TSI/TSISensor.cpp@0:7b58cdacf811, 2014-04-16 (annotated)

Committer:
wue
Date:
Wed Apr 16 12:20:12 2014 +0000
Revision:
0:7b58cdacf811
Sensor reporting over USB CDC

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wue 0:7b58cdacf811 1 /* Freescale Semiconductor Inc.
wue 0:7b58cdacf811 2 * (c) Copyright 2004-2005 Freescale Semiconductor, Inc.
wue 0:7b58cdacf811 3 * (c) Copyright 2001-2004 Motorola, Inc.
wue 0:7b58cdacf811 4 *
wue 0:7b58cdacf811 5 * mbed Microcontroller Library
wue 0:7b58cdacf811 6 * (c) Copyright 2009-2012 ARM Limited.
wue 0:7b58cdacf811 7 *
wue 0:7b58cdacf811 8 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
wue 0:7b58cdacf811 9 * and associated documentation files (the "Software"), to deal in the Software without
wue 0:7b58cdacf811 10 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
wue 0:7b58cdacf811 11 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
wue 0:7b58cdacf811 12 * Software is furnished to do so, subject to the following conditions:
wue 0:7b58cdacf811 13 *
wue 0:7b58cdacf811 14 * The above copyright notice and this permission notice shall be included in all copies or
wue 0:7b58cdacf811 15 * substantial portions of the Software.
wue 0:7b58cdacf811 16 *
wue 0:7b58cdacf811 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
wue 0:7b58cdacf811 18 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
wue 0:7b58cdacf811 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
wue 0:7b58cdacf811 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
wue 0:7b58cdacf811 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
wue 0:7b58cdacf811 22 */
wue 0:7b58cdacf811 23
wue 0:7b58cdacf811 24 #include "mbed.h"
wue 0:7b58cdacf811 25 #include "TSISensor.h"
wue 0:7b58cdacf811 26
wue 0:7b58cdacf811 27 #define NO_TOUCH 0
wue 0:7b58cdacf811 28 #define SLIDER_LENGTH 40 //LENGTH in mm
wue 0:7b58cdacf811 29 #define TOTAL_ELECTRODE 3
wue 0:7b58cdacf811 30
wue 0:7b58cdacf811 31 #define TSI0a 0
wue 0:7b58cdacf811 32 #define TSI1 1
wue 0:7b58cdacf811 33 #define TSI2 2
wue 0:7b58cdacf811 34 #define TSI3 3
wue 0:7b58cdacf811 35 #define TSI4 4
wue 0:7b58cdacf811 36 #define TSI5 5
wue 0:7b58cdacf811 37 #define TSI6 6
wue 0:7b58cdacf811 38 #define TSI7 7
wue 0:7b58cdacf811 39 #define TSI8 8
wue 0:7b58cdacf811 40 #define TSI9 9
wue 0:7b58cdacf811 41 #define TSI10 10
wue 0:7b58cdacf811 42 #define TSI11 11
wue 0:7b58cdacf811 43 #define TSI12 12
wue 0:7b58cdacf811 44 #define TSI13 13
wue 0:7b58cdacf811 45 #define TSI14 14
wue 0:7b58cdacf811 46 #define TSI15 15
wue 0:7b58cdacf811 47
wue 0:7b58cdacf811 48 /*Chose the correct TSI channel for the electrode number*/
wue 0:7b58cdacf811 49 #define ELECTRODE0 TSI9
wue 0:7b58cdacf811 50 #define ELECTRODE1 TSI10
wue 0:7b58cdacf811 51 #define ELECTRODE2 TSI0a
wue 0:7b58cdacf811 52 #define ELECTRODE3 TSI1
wue 0:7b58cdacf811 53 #define ELECTRODE4 TSI2
wue 0:7b58cdacf811 54 #define ELECTRODE5 TSI3
wue 0:7b58cdacf811 55 #define ELECTRODE6 TSI4
wue 0:7b58cdacf811 56 #define ELECTRODE7 TSI5
wue 0:7b58cdacf811 57 #define ELECTRODE8 TSI6
wue 0:7b58cdacf811 58 #define ELECTRODE9 TSI7
wue 0:7b58cdacf811 59 #define ELECTRODE10 TSI8
wue 0:7b58cdacf811 60 #define ELECTRODE11 TSI11
wue 0:7b58cdacf811 61 #define ELECTRODE12 TSI12
wue 0:7b58cdacf811 62 #define ELECTRODE13 TSI13
wue 0:7b58cdacf811 63 #define ELECTRODE14 TSI14
wue 0:7b58cdacf811 64 #define ELECTRODE15 TSI15
wue 0:7b58cdacf811 65
wue 0:7b58cdacf811 66 #define THRESHOLD0 100
wue 0:7b58cdacf811 67 #define THRESHOLD1 100
wue 0:7b58cdacf811 68 #define THRESHOLD2 100
wue 0:7b58cdacf811 69 #define THRESHOLD3 100
wue 0:7b58cdacf811 70 #define THRESHOLD4 100
wue 0:7b58cdacf811 71 #define THRESHOLD5 100
wue 0:7b58cdacf811 72 #define THRESHOLD6 100
wue 0:7b58cdacf811 73 #define THRESHOLD7 100
wue 0:7b58cdacf811 74 #define THRESHOLD8 100
wue 0:7b58cdacf811 75 #define THRESHOLD9 100
wue 0:7b58cdacf811 76 #define THRESHOLD10 100
wue 0:7b58cdacf811 77 #define THRESHOLD11 100
wue 0:7b58cdacf811 78 #define THRESHOLD12 100
wue 0:7b58cdacf811 79 #define THRESHOLD13 100
wue 0:7b58cdacf811 80 #define THRESHOLD14 100
wue 0:7b58cdacf811 81 #define THRESHOLD15 100
wue 0:7b58cdacf811 82
wue 0:7b58cdacf811 83 static uint8_t total_electrode = TOTAL_ELECTRODE;
wue 0:7b58cdacf811 84 static uint8_t elec_array[16]={ELECTRODE0,ELECTRODE1,ELECTRODE2,ELECTRODE3,ELECTRODE4,ELECTRODE5,
wue 0:7b58cdacf811 85 ELECTRODE6,ELECTRODE7,ELECTRODE8,ELECTRODE9,ELECTRODE10,ELECTRODE11,
wue 0:7b58cdacf811 86 ELECTRODE12,ELECTRODE13,ELECTRODE14,ELECTRODE15};
wue 0:7b58cdacf811 87 static uint16_t gu16TSICount[16];
wue 0:7b58cdacf811 88 static uint16_t gu16Baseline[16];
wue 0:7b58cdacf811 89 static uint16_t gu16Threshold[16]={THRESHOLD0,THRESHOLD1,THRESHOLD2,THRESHOLD3,THRESHOLD4,THRESHOLD5,
wue 0:7b58cdacf811 90 THRESHOLD6,THRESHOLD7,THRESHOLD8,THRESHOLD9,THRESHOLD10,THRESHOLD11,
wue 0:7b58cdacf811 91 THRESHOLD12,THRESHOLD13,THRESHOLD14,THRESHOLD15};
wue 0:7b58cdacf811 92 static uint16_t gu16Delta[16];
wue 0:7b58cdacf811 93 static uint8_t ongoing_elec;
wue 0:7b58cdacf811 94 static uint8_t end_flag = 1;
wue 0:7b58cdacf811 95
wue 0:7b58cdacf811 96 static uint8_t SliderPercentegePosition[2] = {NO_TOUCH,NO_TOUCH};
wue 0:7b58cdacf811 97 static uint8_t SliderDistancePosition[2] = {NO_TOUCH,NO_TOUCH};
wue 0:7b58cdacf811 98 static uint32_t AbsolutePercentegePosition = NO_TOUCH;
wue 0:7b58cdacf811 99 static uint32_t AbsoluteDistancePosition = NO_TOUCH;
wue 0:7b58cdacf811 100
wue 0:7b58cdacf811 101 static void tsi_irq();
wue 0:7b58cdacf811 102
wue 0:7b58cdacf811 103 TSISensor::TSISensor() {
wue 0:7b58cdacf811 104 SIM->SCGC5 |= SIM_SCGC5_PORTB_MASK;
wue 0:7b58cdacf811 105 SIM->SCGC5 |= SIM_SCGC5_TSI_MASK;
wue 0:7b58cdacf811 106
wue 0:7b58cdacf811 107 TSI0->GENCS |= (TSI_GENCS_ESOR_MASK
wue 0:7b58cdacf811 108 | TSI_GENCS_MODE(0)
wue 0:7b58cdacf811 109 | TSI_GENCS_REFCHRG(4)
wue 0:7b58cdacf811 110 | TSI_GENCS_DVOLT(0)
wue 0:7b58cdacf811 111 | TSI_GENCS_EXTCHRG(7)
wue 0:7b58cdacf811 112 | TSI_GENCS_PS(4)
wue 0:7b58cdacf811 113 | TSI_GENCS_NSCN(11)
wue 0:7b58cdacf811 114 | TSI_GENCS_TSIIEN_MASK
wue 0:7b58cdacf811 115 | TSI_GENCS_STPE_MASK
wue 0:7b58cdacf811 116 );
wue 0:7b58cdacf811 117
wue 0:7b58cdacf811 118 TSI0->GENCS |= TSI_GENCS_TSIEN_MASK;
wue 0:7b58cdacf811 119
wue 0:7b58cdacf811 120 NVIC_SetVector(TSI0_IRQn, (uint32_t)&tsi_irq);
wue 0:7b58cdacf811 121 NVIC_EnableIRQ(TSI0_IRQn);
wue 0:7b58cdacf811 122
wue 0:7b58cdacf811 123 selfCalibration();
wue 0:7b58cdacf811 124 }
wue 0:7b58cdacf811 125
wue 0:7b58cdacf811 126 void TSISensor::TSISensor_reset(void) {
wue 0:7b58cdacf811 127 SIM->SCGC5 |= SIM_SCGC5_PORTB_MASK;
wue 0:7b58cdacf811 128 SIM->SCGC5 |= SIM_SCGC5_TSI_MASK;
wue 0:7b58cdacf811 129
wue 0:7b58cdacf811 130 TSI0->GENCS |= (TSI_GENCS_ESOR_MASK
wue 0:7b58cdacf811 131 | TSI_GENCS_MODE(0)
wue 0:7b58cdacf811 132 | TSI_GENCS_REFCHRG(4)
wue 0:7b58cdacf811 133 | TSI_GENCS_DVOLT(0)
wue 0:7b58cdacf811 134 | TSI_GENCS_EXTCHRG(7)
wue 0:7b58cdacf811 135 | TSI_GENCS_PS(4)
wue 0:7b58cdacf811 136 | TSI_GENCS_NSCN(11)
wue 0:7b58cdacf811 137 | TSI_GENCS_TSIIEN_MASK
wue 0:7b58cdacf811 138 | TSI_GENCS_STPE_MASK
wue 0:7b58cdacf811 139 );
wue 0:7b58cdacf811 140
wue 0:7b58cdacf811 141 TSI0->GENCS |= TSI_GENCS_TSIEN_MASK;
wue 0:7b58cdacf811 142
wue 0:7b58cdacf811 143 //NVIC_SetVector(TSI0_IRQn, (uint32_t)&tsi_irq);
wue 0:7b58cdacf811 144 //NVIC_EnableIRQ(TSI0_IRQn);
wue 0:7b58cdacf811 145
wue 0:7b58cdacf811 146 selfCalibration();
wue 0:7b58cdacf811 147 }
wue 0:7b58cdacf811 148
wue 0:7b58cdacf811 149 void TSISensor::selfCalibration(void)
wue 0:7b58cdacf811 150 {
wue 0:7b58cdacf811 151 unsigned char cnt;
wue 0:7b58cdacf811 152 unsigned char trigger_backup;
wue 0:7b58cdacf811 153
wue 0:7b58cdacf811 154 TSI0->GENCS |= TSI_GENCS_EOSF_MASK; // Clear End of Scan Flag
wue 0:7b58cdacf811 155 TSI0->GENCS &= ~TSI_GENCS_TSIEN_MASK; // Disable TSI module
wue 0:7b58cdacf811 156
wue 0:7b58cdacf811 157 if(TSI0->GENCS & TSI_GENCS_STM_MASK) // Back-up TSI Trigger mode from Application
wue 0:7b58cdacf811 158 trigger_backup = 1;
wue 0:7b58cdacf811 159 else
wue 0:7b58cdacf811 160 trigger_backup = 0;
wue 0:7b58cdacf811 161
wue 0:7b58cdacf811 162 TSI0->GENCS &= ~TSI_GENCS_STM_MASK; // Use SW trigger
wue 0:7b58cdacf811 163 TSI0->GENCS &= ~TSI_GENCS_TSIIEN_MASK; // Enable TSI interrupts
wue 0:7b58cdacf811 164
wue 0:7b58cdacf811 165 TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; // Enable TSI module
wue 0:7b58cdacf811 166
wue 0:7b58cdacf811 167 for(cnt=0; cnt < total_electrode; cnt++) // Get Counts when Electrode not pressed
wue 0:7b58cdacf811 168 {
wue 0:7b58cdacf811 169 TSI0->DATA = ((elec_array[cnt] << TSI_DATA_TSICH_SHIFT) );
wue 0:7b58cdacf811 170 TSI0->DATA |= TSI_DATA_SWTS_MASK;
wue 0:7b58cdacf811 171 while(!(TSI0->GENCS & TSI_GENCS_EOSF_MASK));
wue 0:7b58cdacf811 172 TSI0->GENCS |= TSI_GENCS_EOSF_MASK;
wue 0:7b58cdacf811 173 gu16Baseline[cnt] = (TSI0->DATA & TSI_DATA_TSICNT_MASK);
wue 0:7b58cdacf811 174 }
wue 0:7b58cdacf811 175
wue 0:7b58cdacf811 176 TSI0->GENCS &= ~TSI_GENCS_TSIEN_MASK; // Disable TSI module
wue 0:7b58cdacf811 177 TSI0->GENCS |= TSI_GENCS_TSIIEN_MASK; // Enale TSI interrupt
wue 0:7b58cdacf811 178 if(trigger_backup) // Restore trigger mode
wue 0:7b58cdacf811 179 TSI0->GENCS |= TSI_GENCS_STM_MASK;
wue 0:7b58cdacf811 180 else
wue 0:7b58cdacf811 181 TSI0->GENCS &= ~TSI_GENCS_STM_MASK;
wue 0:7b58cdacf811 182
wue 0:7b58cdacf811 183 TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; // Enable TSI module
wue 0:7b58cdacf811 184
wue 0:7b58cdacf811 185 TSI0->DATA = ((elec_array[0]<<TSI_DATA_TSICH_SHIFT) );
wue 0:7b58cdacf811 186 TSI0->DATA |= TSI_DATA_SWTS_MASK;
wue 0:7b58cdacf811 187 }
wue 0:7b58cdacf811 188
wue 0:7b58cdacf811 189 void TSISensor::sliderRead(void ) {
wue 0:7b58cdacf811 190 if(end_flag) {
wue 0:7b58cdacf811 191 end_flag = 0;
wue 0:7b58cdacf811 192 if((gu16Delta[0] > gu16Threshold[0])||(gu16Delta[1] > gu16Threshold[1])) {
wue 0:7b58cdacf811 193 SliderPercentegePosition[0] = (gu16Delta[0]*100)/(gu16Delta[0]+gu16Delta[1]);
wue 0:7b58cdacf811 194 SliderPercentegePosition[1] = (gu16Delta[1]*100)/(gu16Delta[0]+gu16Delta[1]);
wue 0:7b58cdacf811 195 SliderDistancePosition[0] = (SliderPercentegePosition[0]* SLIDER_LENGTH)/100;
wue 0:7b58cdacf811 196 SliderDistancePosition[1] = (SliderPercentegePosition[1]* SLIDER_LENGTH)/100;
wue 0:7b58cdacf811 197 AbsolutePercentegePosition = ((100 - SliderPercentegePosition[0]) + SliderPercentegePosition[1])/2;
wue 0:7b58cdacf811 198 AbsoluteDistancePosition = ((SLIDER_LENGTH - SliderDistancePosition[0]) + SliderDistancePosition[1])/2;
wue 0:7b58cdacf811 199 } else {
wue 0:7b58cdacf811 200 SliderPercentegePosition[0] = NO_TOUCH;
wue 0:7b58cdacf811 201 SliderPercentegePosition[1] = NO_TOUCH;
wue 0:7b58cdacf811 202 SliderDistancePosition[0] = NO_TOUCH;
wue 0:7b58cdacf811 203 SliderDistancePosition[1] = NO_TOUCH;
wue 0:7b58cdacf811 204 AbsolutePercentegePosition = NO_TOUCH;
wue 0:7b58cdacf811 205 AbsoluteDistancePosition = NO_TOUCH;
wue 0:7b58cdacf811 206 }
wue 0:7b58cdacf811 207 }
wue 0:7b58cdacf811 208 }
wue 0:7b58cdacf811 209
wue 0:7b58cdacf811 210 float TSISensor::readPercentage() {
wue 0:7b58cdacf811 211 sliderRead();
wue 0:7b58cdacf811 212 return (float)AbsolutePercentegePosition/100.0;
wue 0:7b58cdacf811 213 }
wue 0:7b58cdacf811 214
wue 0:7b58cdacf811 215 uint8_t TSISensor::readDistance() {
wue 0:7b58cdacf811 216 sliderRead();
wue 0:7b58cdacf811 217 return AbsoluteDistancePosition;
wue 0:7b58cdacf811 218 }
wue 0:7b58cdacf811 219
wue 0:7b58cdacf811 220 uint16_t TSISensor::readValue(uint8_t index)
wue 0:7b58cdacf811 221 {
wue 0:7b58cdacf811 222 return gu16TSICount[index];
wue 0:7b58cdacf811 223 }
wue 0:7b58cdacf811 224
wue 0:7b58cdacf811 225 static void changeElectrode(void)
wue 0:7b58cdacf811 226 {
wue 0:7b58cdacf811 227 int16_t u16temp_delta;
wue 0:7b58cdacf811 228
wue 0:7b58cdacf811 229 gu16TSICount[ongoing_elec] = (TSI0->DATA & TSI_DATA_TSICNT_MASK); // Save Counts for current electrode
wue 0:7b58cdacf811 230 u16temp_delta = gu16TSICount[ongoing_elec] - gu16Baseline[ongoing_elec]; // Obtains Counts Delta from callibration reference
wue 0:7b58cdacf811 231 if(u16temp_delta < 0)
wue 0:7b58cdacf811 232 gu16Delta[ongoing_elec] = 0;
wue 0:7b58cdacf811 233 else
wue 0:7b58cdacf811 234 gu16Delta[ongoing_elec] = u16temp_delta;
wue 0:7b58cdacf811 235
wue 0:7b58cdacf811 236 //Change Electrode to Scan
wue 0:7b58cdacf811 237 if(total_electrode > 1)
wue 0:7b58cdacf811 238 {
wue 0:7b58cdacf811 239 if((total_electrode-1) > ongoing_elec)
wue 0:7b58cdacf811 240 ongoing_elec++;
wue 0:7b58cdacf811 241 else
wue 0:7b58cdacf811 242 ongoing_elec = 0;
wue 0:7b58cdacf811 243
wue 0:7b58cdacf811 244 TSI0->DATA = ((elec_array[ongoing_elec]<<TSI_DATA_TSICH_SHIFT) );
wue 0:7b58cdacf811 245 TSI0->DATA |= TSI_DATA_SWTS_MASK;
wue 0:7b58cdacf811 246 }
wue 0:7b58cdacf811 247 }
wue 0:7b58cdacf811 248
wue 0:7b58cdacf811 249 void tsi_irq(void)
wue 0:7b58cdacf811 250 {
wue 0:7b58cdacf811 251 end_flag = 1;
wue 0:7b58cdacf811 252 TSI0->GENCS |= TSI_GENCS_EOSF_MASK; // Clear End of Scan Flag
wue 0:7b58cdacf811 253 changeElectrode();
wue 0:7b58cdacf811 254 }