TSI button support. You may custom the tsi channel of the button and button number.
Dependents: FRDM_KL25Z_TSI_Touch
Fork of TSI by
TSISensor.cpp@4:4b7c5856807e, 2015-05-21 (annotated)
- Committer:
- shaoziyang
- Date:
- Thu May 21 16:29:40 2015 +0000
- Revision:
- 4:4b7c5856807e
- Parent:
- 3:1a60ef257879
TSI button support.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
samux | 1:4dd9262cac47 | 1 | /* Freescale Semiconductor Inc. |
samux | 1:4dd9262cac47 | 2 | * (c) Copyright 2004-2005 Freescale Semiconductor, Inc. |
samux | 1:4dd9262cac47 | 3 | * (c) Copyright 2001-2004 Motorola, Inc. |
samux | 1:4dd9262cac47 | 4 | * |
samux | 1:4dd9262cac47 | 5 | * mbed Microcontroller Library |
samux | 1:4dd9262cac47 | 6 | * (c) Copyright 2009-2012 ARM Limited. |
samux | 1:4dd9262cac47 | 7 | * |
samux | 1:4dd9262cac47 | 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
samux | 1:4dd9262cac47 | 9 | * and associated documentation files (the "Software"), to deal in the Software without |
samux | 1:4dd9262cac47 | 10 | * restriction, including without limitation the rights to use, copy, modify, merge, publish, |
samux | 1:4dd9262cac47 | 11 | * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the |
samux | 1:4dd9262cac47 | 12 | * Software is furnished to do so, subject to the following conditions: |
samux | 1:4dd9262cac47 | 13 | * |
samux | 1:4dd9262cac47 | 14 | * The above copyright notice and this permission notice shall be included in all copies or |
samux | 1:4dd9262cac47 | 15 | * substantial portions of the Software. |
samux | 1:4dd9262cac47 | 16 | * |
samux | 1:4dd9262cac47 | 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
samux | 1:4dd9262cac47 | 18 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
samux | 1:4dd9262cac47 | 19 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
samux | 1:4dd9262cac47 | 20 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
samux | 1:4dd9262cac47 | 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
samux | 1:4dd9262cac47 | 22 | */ |
samux | 1:4dd9262cac47 | 23 | |
samux | 1:4dd9262cac47 | 24 | #include "mbed.h" |
samux | 1:4dd9262cac47 | 25 | #include "TSISensor.h" |
samux | 1:4dd9262cac47 | 26 | |
samux | 1:4dd9262cac47 | 27 | #define NO_TOUCH 0 |
shaoziyang | 4:4b7c5856807e | 28 | #define TOTAL_ELECTRODE ELECTRODE_NUM |
shaoziyang | 4:4b7c5856807e | 29 | #define NSCN_NUM 12 |
samux | 1:4dd9262cac47 | 30 | |
shaoziyang | 4:4b7c5856807e | 31 | #define TSI_CH0 0 |
shaoziyang | 4:4b7c5856807e | 32 | #define TSI_CH1 1 |
shaoziyang | 4:4b7c5856807e | 33 | #define TSI_CH2 2 |
shaoziyang | 4:4b7c5856807e | 34 | #define TSI_CH3 3 |
shaoziyang | 4:4b7c5856807e | 35 | #define TSI_CH4 4 |
shaoziyang | 4:4b7c5856807e | 36 | #define TSI_CH5 5 |
shaoziyang | 4:4b7c5856807e | 37 | #define TSI_CH6 6 |
shaoziyang | 4:4b7c5856807e | 38 | #define TSI_CH7 7 |
shaoziyang | 4:4b7c5856807e | 39 | #define TSI_CH8 8 |
shaoziyang | 4:4b7c5856807e | 40 | #define TSI_CH9 9 |
shaoziyang | 4:4b7c5856807e | 41 | #define TSI_CH10 10 |
shaoziyang | 4:4b7c5856807e | 42 | #define TSI_CH11 11 |
shaoziyang | 4:4b7c5856807e | 43 | #define TSI_CH12 12 |
shaoziyang | 4:4b7c5856807e | 44 | #define TSI_CH13 13 |
shaoziyang | 4:4b7c5856807e | 45 | #define TSI_CH14 14 |
shaoziyang | 4:4b7c5856807e | 46 | #define TSI_CH15 15 |
samux | 1:4dd9262cac47 | 47 | |
shaoziyang | 4:4b7c5856807e | 48 | |
samux | 1:4dd9262cac47 | 49 | |
samux | 1:4dd9262cac47 | 50 | static uint8_t total_electrode = TOTAL_ELECTRODE; |
samux | 1:4dd9262cac47 | 51 | static uint8_t elec_array[16]={ELECTRODE0,ELECTRODE1,ELECTRODE2,ELECTRODE3,ELECTRODE4,ELECTRODE5, |
samux | 1:4dd9262cac47 | 52 | ELECTRODE6,ELECTRODE7,ELECTRODE8,ELECTRODE9,ELECTRODE10,ELECTRODE11, |
samux | 1:4dd9262cac47 | 53 | ELECTRODE12,ELECTRODE13,ELECTRODE14,ELECTRODE15}; |
samux | 1:4dd9262cac47 | 54 | static uint16_t gu16TSICount[16]; |
samux | 1:4dd9262cac47 | 55 | static uint16_t gu16Baseline[16]; |
samux | 1:4dd9262cac47 | 56 | static uint16_t gu16Threshold[16]={THRESHOLD0,THRESHOLD1,THRESHOLD2,THRESHOLD3,THRESHOLD4,THRESHOLD5, |
samux | 1:4dd9262cac47 | 57 | THRESHOLD6,THRESHOLD7,THRESHOLD8,THRESHOLD9,THRESHOLD10,THRESHOLD11, |
samux | 1:4dd9262cac47 | 58 | THRESHOLD12,THRESHOLD13,THRESHOLD14,THRESHOLD15}; |
samux | 1:4dd9262cac47 | 59 | static uint16_t gu16Delta[16]; |
samux | 1:4dd9262cac47 | 60 | static uint8_t ongoing_elec; |
samux | 1:4dd9262cac47 | 61 | static uint8_t end_flag = 1; |
samux | 1:4dd9262cac47 | 62 | |
samux | 1:4dd9262cac47 | 63 | static uint8_t SliderPercentegePosition[2] = {NO_TOUCH,NO_TOUCH}; |
samux | 1:4dd9262cac47 | 64 | static uint8_t SliderDistancePosition[2] = {NO_TOUCH,NO_TOUCH}; |
samux | 1:4dd9262cac47 | 65 | static uint32_t AbsolutePercentegePosition = NO_TOUCH; |
samux | 1:4dd9262cac47 | 66 | static uint32_t AbsoluteDistancePosition = NO_TOUCH; |
samux | 1:4dd9262cac47 | 67 | |
samux | 1:4dd9262cac47 | 68 | static void tsi_irq(); |
samux | 1:4dd9262cac47 | 69 | |
samux | 1:4dd9262cac47 | 70 | TSISensor::TSISensor() { |
samux | 1:4dd9262cac47 | 71 | SIM->SCGC5 |= SIM_SCGC5_PORTB_MASK; |
samux | 1:4dd9262cac47 | 72 | SIM->SCGC5 |= SIM_SCGC5_TSI_MASK; |
samux | 1:4dd9262cac47 | 73 | |
samux | 1:4dd9262cac47 | 74 | TSI0->GENCS |= (TSI_GENCS_ESOR_MASK |
samux | 1:4dd9262cac47 | 75 | | TSI_GENCS_MODE(0) |
samux | 1:4dd9262cac47 | 76 | | TSI_GENCS_REFCHRG(4) |
samux | 1:4dd9262cac47 | 77 | | TSI_GENCS_DVOLT(0) |
samux | 1:4dd9262cac47 | 78 | | TSI_GENCS_EXTCHRG(7) |
samux | 1:4dd9262cac47 | 79 | | TSI_GENCS_PS(4) |
shaoziyang | 4:4b7c5856807e | 80 | | TSI_GENCS_NSCN(NSCN_NUM-1) |
samux | 1:4dd9262cac47 | 81 | | TSI_GENCS_TSIIEN_MASK |
samux | 1:4dd9262cac47 | 82 | | TSI_GENCS_STPE_MASK |
samux | 1:4dd9262cac47 | 83 | ); |
samux | 1:4dd9262cac47 | 84 | |
samux | 1:4dd9262cac47 | 85 | TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; |
samux | 1:4dd9262cac47 | 86 | |
samux | 1:4dd9262cac47 | 87 | NVIC_SetVector(TSI0_IRQn, (uint32_t)&tsi_irq); |
samux | 1:4dd9262cac47 | 88 | NVIC_EnableIRQ(TSI0_IRQn); |
samux | 1:4dd9262cac47 | 89 | |
samux | 1:4dd9262cac47 | 90 | selfCalibration(); |
samux | 1:4dd9262cac47 | 91 | } |
samux | 1:4dd9262cac47 | 92 | |
samux | 1:4dd9262cac47 | 93 | void TSISensor::selfCalibration(void) |
samux | 1:4dd9262cac47 | 94 | { |
samux | 1:4dd9262cac47 | 95 | unsigned char cnt; |
samux | 1:4dd9262cac47 | 96 | unsigned char trigger_backup; |
samux | 1:4dd9262cac47 | 97 | |
samux | 1:4dd9262cac47 | 98 | TSI0->GENCS |= TSI_GENCS_EOSF_MASK; // Clear End of Scan Flag |
samux | 1:4dd9262cac47 | 99 | TSI0->GENCS &= ~TSI_GENCS_TSIEN_MASK; // Disable TSI module |
samux | 1:4dd9262cac47 | 100 | |
samux | 1:4dd9262cac47 | 101 | if(TSI0->GENCS & TSI_GENCS_STM_MASK) // Back-up TSI Trigger mode from Application |
samux | 1:4dd9262cac47 | 102 | trigger_backup = 1; |
samux | 1:4dd9262cac47 | 103 | else |
samux | 1:4dd9262cac47 | 104 | trigger_backup = 0; |
samux | 1:4dd9262cac47 | 105 | |
samux | 1:4dd9262cac47 | 106 | TSI0->GENCS &= ~TSI_GENCS_STM_MASK; // Use SW trigger |
samux | 1:4dd9262cac47 | 107 | TSI0->GENCS &= ~TSI_GENCS_TSIIEN_MASK; // Enable TSI interrupts |
samux | 1:4dd9262cac47 | 108 | |
samux | 1:4dd9262cac47 | 109 | TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; // Enable TSI module |
samux | 1:4dd9262cac47 | 110 | |
samux | 1:4dd9262cac47 | 111 | for(cnt=0; cnt < total_electrode; cnt++) // Get Counts when Electrode not pressed |
samux | 1:4dd9262cac47 | 112 | { |
samux | 1:4dd9262cac47 | 113 | TSI0->DATA = ((elec_array[cnt] << TSI_DATA_TSICH_SHIFT) ); |
samux | 1:4dd9262cac47 | 114 | TSI0->DATA |= TSI_DATA_SWTS_MASK; |
samux | 1:4dd9262cac47 | 115 | while(!(TSI0->GENCS & TSI_GENCS_EOSF_MASK)); |
samux | 1:4dd9262cac47 | 116 | TSI0->GENCS |= TSI_GENCS_EOSF_MASK; |
samux | 1:4dd9262cac47 | 117 | gu16Baseline[cnt] = (TSI0->DATA & TSI_DATA_TSICNT_MASK); |
samux | 1:4dd9262cac47 | 118 | } |
samux | 1:4dd9262cac47 | 119 | |
samux | 1:4dd9262cac47 | 120 | TSI0->GENCS &= ~TSI_GENCS_TSIEN_MASK; // Disable TSI module |
samux | 1:4dd9262cac47 | 121 | TSI0->GENCS |= TSI_GENCS_TSIIEN_MASK; // Enale TSI interrupt |
samux | 1:4dd9262cac47 | 122 | if(trigger_backup) // Restore trigger mode |
samux | 1:4dd9262cac47 | 123 | TSI0->GENCS |= TSI_GENCS_STM_MASK; |
samux | 1:4dd9262cac47 | 124 | else |
samux | 1:4dd9262cac47 | 125 | TSI0->GENCS &= ~TSI_GENCS_STM_MASK; |
samux | 1:4dd9262cac47 | 126 | |
samux | 1:4dd9262cac47 | 127 | TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; // Enable TSI module |
samux | 1:4dd9262cac47 | 128 | |
samux | 1:4dd9262cac47 | 129 | TSI0->DATA = ((elec_array[0]<<TSI_DATA_TSICH_SHIFT) ); |
samux | 1:4dd9262cac47 | 130 | TSI0->DATA |= TSI_DATA_SWTS_MASK; |
samux | 1:4dd9262cac47 | 131 | } |
samux | 1:4dd9262cac47 | 132 | |
samux | 1:4dd9262cac47 | 133 | void TSISensor::sliderRead(void ) { |
samux | 1:4dd9262cac47 | 134 | if(end_flag) { |
samux | 1:4dd9262cac47 | 135 | end_flag = 0; |
samux | 1:4dd9262cac47 | 136 | if((gu16Delta[0] > gu16Threshold[0])||(gu16Delta[1] > gu16Threshold[1])) { |
samux | 1:4dd9262cac47 | 137 | SliderPercentegePosition[0] = (gu16Delta[0]*100)/(gu16Delta[0]+gu16Delta[1]); |
samux | 1:4dd9262cac47 | 138 | SliderPercentegePosition[1] = (gu16Delta[1]*100)/(gu16Delta[0]+gu16Delta[1]); |
samux | 1:4dd9262cac47 | 139 | SliderDistancePosition[0] = (SliderPercentegePosition[0]* SLIDER_LENGTH)/100; |
samux | 1:4dd9262cac47 | 140 | SliderDistancePosition[1] = (SliderPercentegePosition[1]* SLIDER_LENGTH)/100; |
samux | 1:4dd9262cac47 | 141 | AbsolutePercentegePosition = ((100 - SliderPercentegePosition[0]) + SliderPercentegePosition[1])/2; |
samux | 1:4dd9262cac47 | 142 | AbsoluteDistancePosition = ((SLIDER_LENGTH - SliderDistancePosition[0]) + SliderDistancePosition[1])/2; |
samux | 1:4dd9262cac47 | 143 | } else { |
samux | 1:4dd9262cac47 | 144 | SliderPercentegePosition[0] = NO_TOUCH; |
samux | 1:4dd9262cac47 | 145 | SliderPercentegePosition[1] = NO_TOUCH; |
samux | 1:4dd9262cac47 | 146 | SliderDistancePosition[0] = NO_TOUCH; |
samux | 1:4dd9262cac47 | 147 | SliderDistancePosition[1] = NO_TOUCH; |
samux | 1:4dd9262cac47 | 148 | AbsolutePercentegePosition = NO_TOUCH; |
samux | 1:4dd9262cac47 | 149 | AbsoluteDistancePosition = NO_TOUCH; |
samux | 1:4dd9262cac47 | 150 | } |
samux | 1:4dd9262cac47 | 151 | } |
samux | 1:4dd9262cac47 | 152 | } |
samux | 1:4dd9262cac47 | 153 | |
samux | 1:4dd9262cac47 | 154 | float TSISensor::readPercentage() { |
samux | 1:4dd9262cac47 | 155 | sliderRead(); |
samux | 1:4dd9262cac47 | 156 | return (float)AbsolutePercentegePosition/100.0; |
samux | 1:4dd9262cac47 | 157 | } |
samux | 1:4dd9262cac47 | 158 | |
samux | 1:4dd9262cac47 | 159 | uint8_t TSISensor::readDistance() { |
samux | 1:4dd9262cac47 | 160 | sliderRead(); |
samux | 1:4dd9262cac47 | 161 | return AbsoluteDistancePosition; |
samux | 1:4dd9262cac47 | 162 | } |
samux | 1:4dd9262cac47 | 163 | |
shaoziyang | 4:4b7c5856807e | 164 | uint8_t TSISensor::Pressed(uint8_t ch){ |
shaoziyang | 4:4b7c5856807e | 165 | return (gu16Delta[ch] > gu16Threshold[ch]); |
shaoziyang | 4:4b7c5856807e | 166 | } |
shaoziyang | 4:4b7c5856807e | 167 | |
shaoziyang | 4:4b7c5856807e | 168 | float TSISensor::readTSI(uint8_t ch){ |
shaoziyang | 4:4b7c5856807e | 169 | if(Pressed(ch)) |
shaoziyang | 4:4b7c5856807e | 170 | return (gu16Delta[ch]/(NSCN_NUM*128.0 - gu16Baseline[ch])); |
shaoziyang | 4:4b7c5856807e | 171 | else |
shaoziyang | 4:4b7c5856807e | 172 | return 0; |
shaoziyang | 4:4b7c5856807e | 173 | } |
shaoziyang | 4:4b7c5856807e | 174 | |
shaoziyang | 4:4b7c5856807e | 175 | uint16_t TSISensor::readTSI_u16(uint8_t ch){ |
shaoziyang | 4:4b7c5856807e | 176 | return (gu16Delta[ch]); |
shaoziyang | 4:4b7c5856807e | 177 | } |
shaoziyang | 4:4b7c5856807e | 178 | |
samux | 1:4dd9262cac47 | 179 | static void changeElectrode(void) |
samux | 1:4dd9262cac47 | 180 | { |
samux | 1:4dd9262cac47 | 181 | int16_t u16temp_delta; |
samux | 1:4dd9262cac47 | 182 | |
samux | 1:4dd9262cac47 | 183 | gu16TSICount[ongoing_elec] = (TSI0->DATA & TSI_DATA_TSICNT_MASK); // Save Counts for current electrode |
samux | 1:4dd9262cac47 | 184 | u16temp_delta = gu16TSICount[ongoing_elec] - gu16Baseline[ongoing_elec]; // Obtains Counts Delta from callibration reference |
samux | 1:4dd9262cac47 | 185 | if(u16temp_delta < 0) |
samux | 1:4dd9262cac47 | 186 | gu16Delta[ongoing_elec] = 0; |
samux | 1:4dd9262cac47 | 187 | else |
samux | 1:4dd9262cac47 | 188 | gu16Delta[ongoing_elec] = u16temp_delta; |
samux | 1:4dd9262cac47 | 189 | |
samux | 1:4dd9262cac47 | 190 | //Change Electrode to Scan |
samux | 1:4dd9262cac47 | 191 | if(total_electrode > 1) |
samux | 1:4dd9262cac47 | 192 | { |
samux | 1:4dd9262cac47 | 193 | if((total_electrode-1) > ongoing_elec) |
samux | 1:4dd9262cac47 | 194 | ongoing_elec++; |
samux | 1:4dd9262cac47 | 195 | else |
samux | 1:4dd9262cac47 | 196 | ongoing_elec = 0; |
samux | 1:4dd9262cac47 | 197 | |
samux | 1:4dd9262cac47 | 198 | TSI0->DATA = ((elec_array[ongoing_elec]<<TSI_DATA_TSICH_SHIFT) ); |
samux | 1:4dd9262cac47 | 199 | TSI0->DATA |= TSI_DATA_SWTS_MASK; |
samux | 1:4dd9262cac47 | 200 | } |
samux | 1:4dd9262cac47 | 201 | } |
samux | 1:4dd9262cac47 | 202 | |
samux | 1:4dd9262cac47 | 203 | void tsi_irq(void) |
samux | 1:4dd9262cac47 | 204 | { |
samux | 1:4dd9262cac47 | 205 | end_flag = 1; |
samux | 1:4dd9262cac47 | 206 | TSI0->GENCS |= TSI_GENCS_EOSF_MASK; // Clear End of Scan Flag |
samux | 1:4dd9262cac47 | 207 | changeElectrode(); |
samux | 1:4dd9262cac47 | 208 | } |