+++ /dev/null
-/* 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 SLIDER_LENGTH 40 //LENGTH in mm
-#define TOTAL_ELECTRODE 2
-
-#define TSI0a 0
-#define TSI1 1
-#define TSI2 2
-#define TSI3 3
-#define TSI4 4
-#define TSI5 5
-#define TSI6 6
-#define TSI7 7
-#define TSI8 8
-#define TSI9 9
-#define TSI10 10
-#define TSI11 11
-#define TSI12 12
-#define TSI13 13
-#define TSI14 14
-#define TSI15 15
-
-/*Chose the correct TSI channel for the electrode number*/
-#define ELECTRODE0 TSI9
-#define ELECTRODE1 TSI10
-#define ELECTRODE2 TSI0a
-#define ELECTRODE3 TSI1
-#define ELECTRODE4 TSI2
-#define ELECTRODE5 TSI3
-#define ELECTRODE6 TSI4
-#define ELECTRODE7 TSI5
-#define ELECTRODE8 TSI6
-#define ELECTRODE9 TSI7
-#define ELECTRODE10 TSI8
-#define ELECTRODE11 TSI11
-#define ELECTRODE12 TSI12
-#define ELECTRODE13 TSI13
-#define ELECTRODE14 TSI14
-#define ELECTRODE15 TSI15
-
-#define THRESHOLD0 100
-#define THRESHOLD1 100
-#define THRESHOLD2 100
-#define THRESHOLD3 100
-#define THRESHOLD4 100
-#define THRESHOLD5 100
-#define THRESHOLD6 100
-#define THRESHOLD7 100
-#define THRESHOLD8 100
-#define THRESHOLD9 100
-#define THRESHOLD10 100
-#define THRESHOLD11 100
-#define THRESHOLD12 100
-#define THRESHOLD13 100
-#define THRESHOLD14 100
-#define THRESHOLD15 100
-
-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(11)
- | 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;
-}
-
-
-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();
-}
-
projects / qmk_firmware.git / blobdiff