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Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/tests/peripherals/TSI/TSISensor.cpp')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/tests/peripherals/TSI/TSISensor.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/tests/peripherals/TSI/TSISensor.cpp b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/peripherals/TSI/TSISensor.cpp new file mode 100644 index 0000000000..b1d2c9413b --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/peripherals/TSI/TSISensor.cpp @@ -0,0 +1,231 @@ +/* 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(); +} + |