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
- Committer:
- shaoziyang
- Date:
- 2015-05-21
- Revision:
- 4:4b7c5856807e
- Parent:
- 3:1a60ef257879
File content as of revision 4:4b7c5856807e:
/* Freescale Semiconductor Inc. * (c) Copyright 2004-2005 Freescale Semiconductor, Inc. * (c) Copyright 2001-2004 Motorola, Inc. * * mbed Microcontroller Library * (c) Copyright 2009-2012 ARM Limited. * * 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 "TSISensor.h" #define NO_TOUCH 0 #define TOTAL_ELECTRODE ELECTRODE_NUM #define NSCN_NUM 12 #define TSI_CH0 0 #define TSI_CH1 1 #define TSI_CH2 2 #define TSI_CH3 3 #define TSI_CH4 4 #define TSI_CH5 5 #define TSI_CH6 6 #define TSI_CH7 7 #define TSI_CH8 8 #define TSI_CH9 9 #define TSI_CH10 10 #define TSI_CH11 11 #define TSI_CH12 12 #define TSI_CH13 13 #define TSI_CH14 14 #define TSI_CH15 15 static uint8_t total_electrode = TOTAL_ELECTRODE; static uint8_t elec_array[16]={ELECTRODE0,ELECTRODE1,ELECTRODE2,ELECTRODE3,ELECTRODE4,ELECTRODE5, ELECTRODE6,ELECTRODE7,ELECTRODE8,ELECTRODE9,ELECTRODE10,ELECTRODE11, ELECTRODE12,ELECTRODE13,ELECTRODE14,ELECTRODE15}; static uint16_t gu16TSICount[16]; static uint16_t gu16Baseline[16]; static uint16_t gu16Threshold[16]={THRESHOLD0,THRESHOLD1,THRESHOLD2,THRESHOLD3,THRESHOLD4,THRESHOLD5, THRESHOLD6,THRESHOLD7,THRESHOLD8,THRESHOLD9,THRESHOLD10,THRESHOLD11, THRESHOLD12,THRESHOLD13,THRESHOLD14,THRESHOLD15}; static uint16_t gu16Delta[16]; static uint8_t ongoing_elec; static uint8_t end_flag = 1; static uint8_t SliderPercentegePosition[2] = {NO_TOUCH,NO_TOUCH}; static uint8_t SliderDistancePosition[2] = {NO_TOUCH,NO_TOUCH}; static uint32_t AbsolutePercentegePosition = NO_TOUCH; static uint32_t AbsoluteDistancePosition = NO_TOUCH; static void tsi_irq(); TSISensor::TSISensor() { SIM->SCGC5 |= SIM_SCGC5_PORTB_MASK; SIM->SCGC5 |= SIM_SCGC5_TSI_MASK; TSI0->GENCS |= (TSI_GENCS_ESOR_MASK | TSI_GENCS_MODE(0) | TSI_GENCS_REFCHRG(4) | TSI_GENCS_DVOLT(0) | TSI_GENCS_EXTCHRG(7) | TSI_GENCS_PS(4) | TSI_GENCS_NSCN(NSCN_NUM-1) | TSI_GENCS_TSIIEN_MASK | TSI_GENCS_STPE_MASK ); TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; NVIC_SetVector(TSI0_IRQn, (uint32_t)&tsi_irq); NVIC_EnableIRQ(TSI0_IRQn); selfCalibration(); } void TSISensor::selfCalibration(void) { unsigned char cnt; unsigned char trigger_backup; TSI0->GENCS |= TSI_GENCS_EOSF_MASK; // Clear End of Scan Flag TSI0->GENCS &= ~TSI_GENCS_TSIEN_MASK; // Disable TSI module if(TSI0->GENCS & TSI_GENCS_STM_MASK) // Back-up TSI Trigger mode from Application trigger_backup = 1; else trigger_backup = 0; TSI0->GENCS &= ~TSI_GENCS_STM_MASK; // Use SW trigger TSI0->GENCS &= ~TSI_GENCS_TSIIEN_MASK; // Enable TSI interrupts TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; // Enable TSI module for(cnt=0; cnt < total_electrode; cnt++) // Get Counts when Electrode not pressed { TSI0->DATA = ((elec_array[cnt] << TSI_DATA_TSICH_SHIFT) ); TSI0->DATA |= TSI_DATA_SWTS_MASK; while(!(TSI0->GENCS & TSI_GENCS_EOSF_MASK)); TSI0->GENCS |= TSI_GENCS_EOSF_MASK; gu16Baseline[cnt] = (TSI0->DATA & TSI_DATA_TSICNT_MASK); } TSI0->GENCS &= ~TSI_GENCS_TSIEN_MASK; // Disable TSI module TSI0->GENCS |= TSI_GENCS_TSIIEN_MASK; // Enale TSI interrupt if(trigger_backup) // Restore trigger mode TSI0->GENCS |= TSI_GENCS_STM_MASK; else TSI0->GENCS &= ~TSI_GENCS_STM_MASK; TSI0->GENCS |= TSI_GENCS_TSIEN_MASK; // Enable TSI module TSI0->DATA = ((elec_array[0]<<TSI_DATA_TSICH_SHIFT) ); TSI0->DATA |= TSI_DATA_SWTS_MASK; } void TSISensor::sliderRead(void ) { if(end_flag) { end_flag = 0; if((gu16Delta[0] > gu16Threshold[0])||(gu16Delta[1] > gu16Threshold[1])) { SliderPercentegePosition[0] = (gu16Delta[0]*100)/(gu16Delta[0]+gu16Delta[1]); SliderPercentegePosition[1] = (gu16Delta[1]*100)/(gu16Delta[0]+gu16Delta[1]); SliderDistancePosition[0] = (SliderPercentegePosition[0]* SLIDER_LENGTH)/100; SliderDistancePosition[1] = (SliderPercentegePosition[1]* SLIDER_LENGTH)/100; AbsolutePercentegePosition = ((100 - SliderPercentegePosition[0]) + SliderPercentegePosition[1])/2; AbsoluteDistancePosition = ((SLIDER_LENGTH - SliderDistancePosition[0]) + SliderDistancePosition[1])/2; } else { SliderPercentegePosition[0] = NO_TOUCH; SliderPercentegePosition[1] = NO_TOUCH; SliderDistancePosition[0] = NO_TOUCH; SliderDistancePosition[1] = NO_TOUCH; AbsolutePercentegePosition = NO_TOUCH; AbsoluteDistancePosition = NO_TOUCH; } } } float TSISensor::readPercentage() { sliderRead(); return (float)AbsolutePercentegePosition/100.0; } uint8_t TSISensor::readDistance() { sliderRead(); return AbsoluteDistancePosition; } uint8_t TSISensor::Pressed(uint8_t ch){ return (gu16Delta[ch] > gu16Threshold[ch]); } float TSISensor::readTSI(uint8_t ch){ if(Pressed(ch)) return (gu16Delta[ch]/(NSCN_NUM*128.0 - gu16Baseline[ch])); else return 0; } uint16_t TSISensor::readTSI_u16(uint8_t ch){ return (gu16Delta[ch]); } static void changeElectrode(void) { int16_t u16temp_delta; gu16TSICount[ongoing_elec] = (TSI0->DATA & TSI_DATA_TSICNT_MASK); // Save Counts for current electrode u16temp_delta = gu16TSICount[ongoing_elec] - gu16Baseline[ongoing_elec]; // Obtains Counts Delta from callibration reference if(u16temp_delta < 0) gu16Delta[ongoing_elec] = 0; else gu16Delta[ongoing_elec] = u16temp_delta; //Change Electrode to Scan if(total_electrode > 1) { if((total_electrode-1) > ongoing_elec) ongoing_elec++; else ongoing_elec = 0; TSI0->DATA = ((elec_array[ongoing_elec]<<TSI_DATA_TSICH_SHIFT) ); TSI0->DATA |= TSI_DATA_SWTS_MASK; } } void tsi_irq(void) { end_flag = 1; TSI0->GENCS |= TSI_GENCS_EOSF_MASK; // Clear End of Scan Flag changeElectrode(); }