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- /*******************************************************************************
- * CTS_HAL.c - Hardware abstraction of various combinations of modules to
- * perform a capacitance measurement.
- *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the
- * distribution.
- *
- * Neither the name of Texas Instruments Incorporated nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ******************************************************************************/
- /***************************************************************************//**
- * @file CTS_HAL.c
- *
- * @brief
- *
- * @par Project:
- * MSP430 Capacitive Touch Library
- *
- * @par Developed using:
- * IAR Version : 5.10.6 [Kickstart] (5.10.6.30180)
- * CCS Version : 4.2.1.00004, w/support for GCC extensions (--gcc)
- *
- *
- * @version 1.0.0 Initial Release
- *
- * @par Supported Hardware Configurations:
- * - TI_CTS_RO_COMPAp_TA0_WDTp_HAL()
- * - TI_CTS_fRO_COMPAp_TA0_SW_HAL()
- * - TI_CTS_fRO_COMPAp_SW_TA0_HAL()
- * - TI_CTS_RO_COMPAp_TA1_WDTp_HAL()
- * - TI_CTS_fRO_COMPAp_TA1_SW_HAL()
- * - TI_CTS_RC_PAIR_TA0_HAL()
- * - TI_CTS_RO_PINOSC_TA0_WDTp_HAL()
- * - TI_CTS_RO_PINOSC_TA0_HAL()
- * - TI_CTS_fRO_PINOSC_TA0_SW_HAL()
- * - TI_CTS_RO_COMPB_TA0_WDTA_HAL()
- * - TI_CTS_RO_COMPB_TA1_WDTA_HAL()
- * - TI_CTS_fRO_COMPB_TA0_SW_HAL()
- * - TI_CTS_fRO_COMPB_TA1_SW_HAL()
- ******************************************************************************/
-
-
- /***************************************************************************//**
- * @addtogroup CTS_HAL
- * @{
- ******************************************************************************/
-
- #include "CTS_HAL.h"
-
- #ifdef RO_COMPAp_TA0_WDTp
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompA+, TimerA0, and WDT+
- *
- * \n Schematic Description of CompA+ forming relaxation oscillator and
- * coupling (connection) between the relaxation oscillator and TimerA0.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 100Kohms)
- * \n
- * \n +-<-Px.y (reference)
- * \n |
- * \n R
- * \n |
- * \n +---+-->COMPA+
- * \n | |
- * \n R R
- * \n | |
- * \n GND |
- * \n |
- * \n +-->TACLK
- * \n |
- * \n element-+-R--+-<-CAOUT
- * \n |
- * \n +------->COMPA-
- * \n
- * \n The WDT+ interval represents the measurement window. The number of
- * counts within the TA0R that have accumulated during the measurement
- * window represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_RO_COMPAp_TA0_WDTp_HAL(const struct Sensor *group, uint16_t *counts)
- {
- uint8_t i;
- //** Context Save
- // Status Register:
- // WDTp: IE1, WDTCTL
- // TIMERA0: TACTL, TACCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- uint8_t contextSaveSR;
- uint8_t contextSaveIE1;
- uint16_t contextSaveWDTCTL;
- uint16_t contextSaveTACTL,contextSaveTACCTL1,contextSaveTACCR1;
- uint8_t contextSaveCACTL1,contextSaveCACTL2,contextSaveCAPD;
- uint8_t contextSaveCaoutDir,contextSaveCaoutSel;
- uint8_t contextSavetxclkDir,contextSavetxclkSel;
- uint8_t contextSaveRefDir,contextSaveRefOutSel;
- #ifdef SEL2REGISTER
- uint8_t contextSaveCaoutSel2,contextSaveTxclkSel2;
-
- contextSaveCaoutSel2 = *(group->caoutSel2Register);
- contextSaveTxclkSel2 = *(group->txclkSel2Register);
- #endif
- contextSaveSR = __get_SR_register();
- contextSaveIE1 = IE1;
- contextSaveWDTCTL = WDTCTL;
- contextSaveWDTCTL &= 0x00FF;
- contextSaveWDTCTL |= WDTPW;
- contextSaveTACTL = TACTL;
- contextSaveTACCTL1 = TACCTL1;
- contextSaveTACCR1 = TACCR1;
- contextSaveCACTL1 = CACTL1;
- contextSaveCACTL2 = CACTL2;
- contextSaveCAPD = CAPD;
- contextSaveCaoutDir = *(group->caoutDirRegister);
- contextSaveCaoutSel = *(group->caoutSelRegister);
- contextSavetxclkDir = *(group->txclkDirRegister);
- contextSavetxclkSel = *(group->txclkSelRegister);
- contextSaveRefDir = *(group->refPxdirRegister);
- contextSaveRefOutSel = *(group->refPxoutRegister);
-
- TACTL = TASSEL_0+MC_2; // TACLK, cont mode
- TACCTL1 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
-
- *(group->caoutDirRegister) |= group->caoutBits;
- *(group->txclkDirRegister) &= ~group->txclkBits;
- *(group->caoutSelRegister) |= group->caoutBits;
- *(group->txclkSelRegister) |= group->txclkBits;
-
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) |= group->caoutBits;
- *(group->txclkSel2Register) |= group->txclkBits;
- #endif
-
- *(group->refPxdirRegister) |= group->refBits;
- *(group->refPxoutRegister) |= group->refBits;
- CACTL1 |= CAON; // Turn on comparator
- CAPD |= (group->capdBits);
- IE1 |= WDTIE; // enable WDT interrupt
-
- for (i = 0; i<(group->numElements); i++)
- {
- CACTL2= group->refCactl2Bits + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer *****************************************************
- // Set duration of sensor measurment
- WDTCTL = WDTPW+WDTTMSEL+ group->measGateSource + group->accumulationCycles;
- TACTL |= TACLR; // Clear Timer_A TAR
- __bis_SR_register(LPM0_bits+GIE); // Wait for WDT interrupt
- TACCTL1 ^= CCIS0; // Create SW capture of CCR1
- counts[i] = TACCR1; // Save result
- WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
- }
- // End Sequence
-
- //** Context Restore
- // WDTp: IE1, WDCTL
- // TIMERA0: TACTL, TACCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) = contextSaveCaoutSel2;
- *(group->txclkSel2Register) = contextSaveTxclkSel2;
- #endif
- __bis_SR_register(contextSaveSR);
- if(!(contextSaveSR & GIE))
- {
- __bic_SR_register(GIE); // Wait for WDT interrupt
- }
- IE1 = contextSaveIE1;
- WDTCTL = contextSaveWDTCTL;
- TACTL = contextSaveTACTL;
- TACCTL1 = contextSaveTACCTL1;
- TACCR1 = contextSaveTACCR1;
- CACTL1 = contextSaveCACTL1;
- CACTL2 = contextSaveCACTL2;
- CAPD = contextSaveCAPD;
- *(group->caoutDirRegister) = contextSaveCaoutDir;
- *(group->caoutSelRegister) = contextSaveCaoutSel;
- *(group->txclkDirRegister) = contextSavetxclkDir;
- *(group->txclkSelRegister) = contextSavetxclkSel;
- *(group->refPxdirRegister) = contextSaveRefDir;
- *(group->refPxoutRegister) = contextSaveRefOutSel;
- }
- #endif
-
- #ifdef fRO_COMPAp_TA0_SW
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompA+, TimerA0, and SW loop
- *
- * \n Schematic Description of CompA+ forming relaxation oscillator.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 100Kohms)
- * \n
- * \n +-<-Px.y (reference)
- * \n |
- * \n R
- * \n |
- * \n +---+-->COMPA+
- * \n | |
- * \n R R
- * \n | |
- * \n GND |
- * \n |
- * \n +-->TACLK
- * \n |
- * \n element-+-R--+-<-CAOUT
- * \n |
- * \n +------->COMPA-
- * \n
- * \n The timer counts to TA0CCR0 representing the measurement window. The
- * number of counts within the SW loop that have accumulated during the
- * measurement window represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_fRO_COMPAp_TA0_SW_HAL(const struct Sensor *group, uint16_t *counts)
- {
- uint8_t i;
- uint16_t j;
- //** Context Save
- // Status Register:
- // TIMERA0: TACTL, TACCTL0
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- uint16_t contextSaveTACTL,contextSaveTACCTL0,contextSaveTACCR0;
- uint8_t contextSaveCACTL1,contextSaveCACTL2,contextSaveCAPD;
- uint8_t contextSaveCaoutDir,contextSaveCaoutSel;
- uint8_t contextSavetxclkDir,contextSavetxclkSel;
- uint8_t contextSaveRefDir,contextSaveRefOutSel;
- #ifdef SEL2REGISTER
- uint8_t contextSaveCaoutSel2,contextSaveTxclkSel2;
-
- contextSaveCaoutSel2 = *(group->caoutSel2Register);
- contextSaveTxclkSel2 = *(group->txclkSel2Register);
- #endif
- contextSaveTACTL = TACTL;
- contextSaveTACCTL0 = TACCTL0;
- contextSaveTACCR0 = TACCR0;
- contextSaveCACTL1 = CACTL1;
- contextSaveCACTL2 = CACTL2;
- contextSaveCAPD = CAPD;
- contextSaveCaoutDir = *(group->caoutDirRegister);
- contextSaveCaoutSel = *(group->caoutSelRegister);
- contextSavetxclkDir = *(group->txclkDirRegister);
- contextSavetxclkSel = *(group->txclkSelRegister);
- contextSaveRefDir = *(group->refPxdirRegister);
- contextSaveRefOutSel = *(group->refPxoutRegister);
-
- //** Setup Measurement timer***************************************************
-
- // Configure Timer TA0
- TACCR0 =(group->accumulationCycles);
- TACCTL0 &= ~CAP;
- // setup connections between CAOUT and TA0
- *(group->caoutDirRegister) |= group->caoutBits;
- *(group->txclkDirRegister) &= ~group->txclkBits;
- *(group->caoutSelRegister) |= group->caoutBits;
- *(group->txclkSelRegister) |= group->txclkBits;
-
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) |= group->caoutBits;
- *(group->txclkSel2Register) |= group->txclkBits;
- #endif
- // setup reference
- *(group->refPxdirRegister) |= group->refBits;
- *(group->refPxoutRegister) |= group->refBits;
- CACTL1 |= CAON; // Turn on comparator
- CAPD |= (group->capdBits);
-
- for (i = 0; i<(group->numElements); i++)
- {
- j=0;
- CACTL2= group->refCactl2Bits + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer **************
- // Set duration of sensor measurment
- TACTL = TASSEL_0+TACLR+MC_1; // TACLK
- while(!(TACTL & TAIFG))
- {
- j++;
- } // end accumulation
- counts[i] = j;
- }
- // End Sequence
- //** Context Restore
- // TIMERA0: TACTL, TACCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) = contextSaveCaoutSel2;
- *(group->txclkSel2Register) = contextSaveTxclkSel2;
- #endif
- TACTL = contextSaveTACTL;
- TACCTL0 = contextSaveTACCTL0;
- TACCR0 = contextSaveTACCR0;
- CACTL1 = contextSaveCACTL1;
- CACTL2 = contextSaveCACTL2;
- CAPD = contextSaveCAPD;
- *(group->caoutDirRegister) = contextSaveCaoutDir;
- *(group->caoutSelRegister) = contextSaveCaoutSel;
- *(group->txclkDirRegister) = contextSavetxclkDir;
- *(group->txclkSelRegister) = contextSavetxclkSel;
- *(group->refPxdirRegister) = contextSaveRefDir;
- *(group->refPxoutRegister) = contextSaveRefOutSel;
- }
- #endif
-
- #ifdef fRO_COMPAp_SW_TA0
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompA+, TimerA0, and SW loop
- *
- * \n Schematic Description of CompA+ forming relaxation oscillator.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 100Kohms)
- * \n
- * \n +-<-Px.y (reference)
- * \n |
- * \n R
- * \n |
- * \n +---+-->COMPA+
- * \n | |
- * \n R R
- * \n | |
- * \n GND |
- * \n |
- * \n |
- * \n element-+-R--+-<-CAOUT
- * \n |
- * \n +------->COMPA-
- * \n
- * \n The SW loop counts to 'n' accumulationCycles, representing the
- * \n measurement window. The number of timer counts within TA0R register
- * \n represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_fRO_COMPAp_SW_TA0_HAL(const struct Sensor *group, uint16_t *counts)
- {
- uint8_t i;
- uint16_t j;
- //** Context Save
- // Status Register:
- // TIMERA0: TACTL, TACCTL0, TACCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, caoutSel2, refout, refdir
- uint16_t contextSaveTACTL,contextSaveTACCTL0,contextSaveTACCTL1;
- uint16_t contextSaveTACCR0,contextSaveTACCR1;
- uint8_t contextSaveCACTL1,contextSaveCACTL2,contextSaveCAPD;
- uint8_t contextSaveCaoutDir,contextSaveCaoutSel;
- uint8_t contextSaveRefDir,contextSaveRefOutSel;
- #ifdef SEL2REGISTER
- uint8_t contextSaveCaoutSel2,contextSaveTxclkSel2;
-
- contextSaveCaoutSel2 = *(group->caoutSel2Register);
- #endif
- contextSaveTACTL = TACTL;
- contextSaveTACCTL0 = TACCTL0;
- contextSaveTACCTL1 = TACCTL1;
- contextSaveTACCR0 = TACCR0;
- contextSaveTACCR1 = TACCR1;
- contextSaveCACTL1 = CACTL1;
- contextSaveCACTL2 = CACTL2;
- contextSaveCAPD = CAPD;
- contextSaveCaoutDir = *(group->caoutDirRegister);
- contextSaveCaoutSel = *(group->caoutSelRegister);
- contextSaveRefDir = *(group->refPxdirRegister);
- contextSaveRefOutSel = *(group->refPxoutRegister);
- //** Setup Measurement timer***************************************************
-
- // Configure Timer TA0
- TACCTL0 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
- TACCTL1 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
-
- // setup connections between CAOUT and TA0
- *(group->caoutDirRegister) |= group->caoutBits;
- *(group->caoutSelRegister) |= group->caoutBits;
-
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) |= group->caoutBits;
- #endif
- // setup reference
- *(group->refPxdirRegister) |= group->refBits;
- *(group->refPxoutRegister) |= group->refBits;
- CACTL1 |= CAON; // Turn on comparator
- CAPD |= (group->capdBits);
- for (i = 0; i<(group->numElements); i++)
- {
- CACTL2= group->refCactl2Bits + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer **************
- // Set duration of sensor measurment
- TACTL = group->measureGateSource+group->sourceScale+TACLR+MC_2;
- TACCTL0 ^= CCIS0; // Create SW capture of CCR0
- for(j = group->accumulationCycles; j > 0; j--)
- {
- CACTL1 &= ~CAIFG;
- while(!(CACTL1 & CAIFG));
- }
- TACCTL1 ^= CCIS0; // Create SW capture of CCR1
- counts[i] = TACCR1; // Save result
- counts[i] -= TACCR0; // Save result
- TACCTL0 &= ~CCIFG;
- TACCTL1 &= ~CCIFG;
- }
- // End Sequence
- //** Context Restore
- // WDTp: IE1, WDCTL
- // TIMERA0: TACTL, TACCTL0, TACCTL1, TACCR0, TACCR1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, caoutSel2, refout, refdir
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) = contextSaveCaoutSel2;
- #endif
- TACTL = contextSaveTACTL;
- TACCTL0 = contextSaveTACCTL0;
- TACCTL1 = contextSaveTACCTL1;
- TACCR0 = contextSaveTACCR0;
- TACCR1 = contextSaveTACCR1;
- CACTL1 = contextSaveCACTL1;
- CACTL2 = contextSaveCACTL2;
- CAPD = contextSaveCAPD;
- *(group->caoutDirRegister) = contextSaveCaoutDir;
- *(group->caoutSelRegister) = contextSaveCaoutSel;
- *(group->refPxdirRegister) = contextSaveRefDir;
- *(group->refPxoutRegister) = contextSaveRefOutSel;
- }
- #endif
-
- #ifdef RO_COMPAp_TA1_WDTp
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompA+, TimerA1, and WDT+
- *
- * Schematic Description of CompA+ forming relaxation oscillator and
- * coupling (connection) between the relaxation oscillator and TimerA0.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 100Kohms)
- * \n
- * \n +-<-Px.y (reference)
- * \n |
- * \n R
- * \n |
- * \n +---+-->COMPA+
- * \n | |
- * \n R R
- * \n | |
- * \n GND |
- * \n |
- * \n +-->TA1CLK
- * \n |
- * \n element-+-R--+-<-CAOUT
- * \n |
- * \n +------->COMPA-
- * \n
- * The WDT+ interval represents the measurement window. The number of
- * counts within the TA0R that have accumulated during the measurement
- * window represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_RO_COMPAp_TA1_WDTp_HAL(const struct Sensor *group, uint16_t *counts)
- {
- uint8_t i;
- //** Context Save
- // Status Register:
- // WDTp: IE1, WDTCTL
- // TIMERA0: TA1CTL, TA1CCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- uint8_t contextSaveSR;
- uint8_t contextSaveIE1;
- uint16_t contextSaveWDTCTL;
- uint16_t contextSaveTA1CTL,contextSaveTA1CCTL1;
- uint16_t contextSaveTA1CCR1;
- uint8_t contextSaveCACTL1,contextSaveCACTL2,contextSaveCAPD;
- uint8_t contextSaveCaoutDir,contextSaveCaoutSel;
- uint8_t contextSavetxclkDir,contextSavetxclkSel;
- uint8_t contextSaveRefDir,contextSaveRefOutSel;
- #ifdef SEL2REGISTER
- uint8_t contextSaveCaoutSel2,contextSaveTxclkSel2;
-
- contextSaveCaoutSel2 = *(group->caoutSel2Register);
- contextSaveTxclkSel2 = *(group->txclkSel2Register);
- #endif
- contextSaveSR = __get_SR_register();
- contextSaveIE1 = IE1;
- contextSaveWDTCTL = WDTCTL;
- contextSaveWDTCTL &= 0x00FF;
- contextSaveWDTCTL |= WDTPW;
- contextSaveTA1CTL = TA1CTL;
- contextSaveTA1CCTL1 = TA1CCTL1;
- contextSaveTA1CCR1 = TA1CCR1;
- contextSaveCACTL1 = CACTL1;
- contextSaveCACTL2 = CACTL2;
- contextSaveCAPD = CAPD;
- contextSaveCaoutDir = *(group->caoutDirRegister);
- contextSaveCaoutSel = *(group->caoutSelRegister);
- contextSavetxclkDir = *(group->txclkDirRegister);
- contextSavetxclkSel = *(group->txclkSelRegister);
- contextSaveRefDir = *(group->refPxdirRegister);
- contextSaveRefOutSel = *(group->refPxoutRegister);
- //** Setup Measurement timer***************************************************
- // Choices are TA0,TA1,TB0,TB1,TD0,TD1 these choices are pushed up into the
- // capacitive touch layer.
-
- TA1CTL = TASSEL_0+MC_2; // TA1CLK, cont mode
- TA1CCTL1 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
-
- *(group->caoutDirRegister) |= group->caoutBits;
- *(group->txclkDirRegister) &= ~group->txclkBits;
- *(group->caoutSelRegister) |= group->caoutBits;
- *(group->txclkSelRegister) |= group->txclkBits;
-
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) |= group->caoutBits;
- *(group->txclkSel2Register) |= group->txclkBits;
- #endif
-
- *(group->refPxdirRegister) |= group->refBits;
- *(group->refPxoutRegister) |= group->refBits;
- CACTL1 |= CAON; // Turn on comparator
- CAPD |= (group->capdBits);
- IE1 |= WDTIE; // enable WDT interrupt
-
- for (i = 0; i<(group->numElements); i++)
- {
- CACTL2= group->refCactl2Bits + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer *****************************************************
- // Set duration of sensor measurment
- WDTCTL = WDTPW+WDTTMSEL+ group->measGateSource + group->accumulationCycles;
- TA1CTL |= TACLR; // Clear Timer_A TAR
- __bis_SR_register(LPM0_bits+GIE); // Wait for WDT interrupt
- TA1CCTL1 ^= CCIS0; // Create SW capture of CCR1
- counts[i] = TA1CCR1; // Save result
- WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
- }
- // End Sequence
- //** Context Restore
- // WDTp: IE1, WDCTL
- // TIMERA0: TACTL, TACCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) = contextSaveCaoutSel2;
- *(group->txclkSel2Register) = contextSaveTxclkSel2;
- #endif
- __bis_SR_register(contextSaveSR);
- if(!(contextSaveSR & GIE))
- {
- __bic_SR_register(GIE); // Wait for WDT interrupt
- }
- IE1 = contextSaveIE1;
- WDTCTL = contextSaveWDTCTL;
- TA1CTL = contextSaveTA1CTL;
- TA1CCTL1 = contextSaveTA1CCTL1;
- TA1CCR1 = contextSaveTA1CCR1;
- CACTL1 = contextSaveCACTL1;
- CACTL2 = contextSaveCACTL2;
- CAPD = contextSaveCAPD;
- *(group->caoutDirRegister) = contextSaveCaoutDir;
- *(group->caoutSelRegister) = contextSaveCaoutSel;
- *(group->txclkDirRegister) = contextSavetxclkDir;
- *(group->txclkSelRegister) = contextSavetxclkSel;
- *(group->refPxdirRegister) = contextSaveRefDir;
- *(group->refPxoutRegister) = contextSaveRefOutSel;
- }
- #endif
-
- #ifdef fRO_COMPAp_TA1_SW
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompA+, TimerA1, and SW loop
- *
- * Schematic Description of CompA+ forming relaxation oscillator.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 100Kohms)
- * \n
- * \n +-<-Px.y (reference)
- * \n |
- * \n R
- * \n |
- * \n +---+-->COMPA+
- * \n | |
- * \n R R
- * \n | |
- * \n GND |
- * \n |
- * \n +-->TA1CLK
- * \n |
- * \n element-+-R--+-<-CAOUT
- * \n |
- * \n +------->COMPA-
- * \n
- * \n The timer counts to TA1CCR0 representing the measurement window. The
- * number of counts within the SW loop that have accumulated during the
- * measurement window represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_fRO_COMPAp_TA1_SW_HAL(const struct Sensor *group, uint16_t *counts)
- {
- uint8_t i;
- uint16_t j;
- //** Context Save
- // Status Register:
- // TIMERA0: TA1CTL, TA1CCTL0
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- uint16_t contextSaveTA1CTL,contextSaveTA1CCTL0,contextSaveTA1CCR0;
- uint8_t contextSaveCACTL1,contextSaveCACTL2,contextSaveCAPD;
- uint8_t contextSaveCaoutDir,contextSaveCaoutSel;
- uint8_t contextSavetxclkDir,contextSavetxclkSel;
- uint8_t contextSaveRefDir,contextSaveRefOutSel;
- #ifdef SEL2REGISTER
- uint8_t contextSaveCaoutSel2,contextSaveTxclkSel2;
-
- contextSaveCaoutSel2 = *(group->caoutSel2Register);
- contextSaveTxclkSel2 = *(group->txclkSel2Register);
- #endif
- contextSaveTA1CTL = TA1CTL;
- contextSaveTA1CCTL0 = TA1CCTL0;
- contextSaveTA1CCR0 = TA1CCR0;
- contextSaveCACTL1 = CACTL1;
- contextSaveCACTL2 = CACTL2;
- contextSaveCAPD = CAPD;
- contextSaveCaoutDir = *(group->caoutDirRegister);
- contextSaveCaoutSel = *(group->caoutSelRegister);
- contextSavetxclkDir = *(group->txclkDirRegister);
- contextSavetxclkSel = *(group->txclkSelRegister);
- contextSaveRefDir = *(group->refPxdirRegister);
- contextSaveRefOutSel = *(group->refPxoutRegister);
- //** Setup Measurement timer***************************************************
-
- // Configure Timer TA0
- TA1CCR0 =(group->accumulationCycles);
- // setup connections between CAOUT and TA0
- *(group->caoutDirRegister) |= group->caoutBits;
- *(group->txclkDirRegister) &= ~group->txclkBits;
- *(group->caoutSelRegister) |= group->caoutBits;
- *(group->txclkSelRegister) |= group->txclkBits;
-
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) |= group->caoutBits;
- *(group->txclkSel2Register) |= group->txclkBits;
- #endif
- // setup reference
- *(group->refPxdirRegister) |= group->refBits;
- *(group->refPxoutRegister) |= group->refBits;
- CACTL1 |= CAON; // Turn on comparator
- CAPD |= (group->capdBits);
-
- for (i = 0; i<(group->numElements); i++)
- {
- j=0;
- CACTL2= group->refCactl2Bits + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer **************
- // Set duration of sensor measurment
- TA1CTL = TASSEL_0+TACLR+MC_1; // TACLK
- while(!(TACTL & TAIFG))
- {
- j++;
- } // end accumulation
- counts[i] = j;
- }
- // End Sequence
- //** Context Restore
- // WDTp: IE1, WDCTL
- // TIMERA0: TACTL, TACCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: caoutDIR, caoutSel, txclkDIR, txclkSel, caoutSel2, txclkSel2, refout, refdir
- #ifdef SEL2REGISTER
- *(group->caoutSel2Register) = contextSaveCaoutSel2;
- *(group->txclkSel2Register) = contextSaveTxclkSel2;
- #endif
- TA1CTL = contextSaveTA1CTL;
- TA1CCTL0 = contextSaveTA1CCTL0;
- TA1CCR0 = contextSaveTA1CCR0;
- CACTL1 = contextSaveCACTL1;
- CACTL2 = contextSaveCACTL2;
- CAPD = contextSaveCAPD;
- *(group->caoutDirRegister) = contextSaveCaoutDir;
- *(group->caoutSelRegister) = contextSaveCaoutSel;
- *(group->txclkDirRegister) = contextSavetxclkDir;
- *(group->txclkSelRegister) = contextSavetxclkSel;
- *(group->refPxdirRegister) = contextSaveRefDir;
- *(group->refPxoutRegister) = contextSaveRefOutSel;
- }
- #endif
-
- /***************************************************************************//**
- * @brief RC method capactiance measurement using a Pair of GPIO and TimerA0
- *
- * Schematic Description of two GPIO forming RC measruement.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 1Mohms)
- * \n
- * \n +-<-Px.y (reference)
- * \n |
- * \n R
- * \n |
- * \n Element---+-->Pa.b
- * \n
- * \n Charge and Discharge Cycle
- * \n +
- * \n + +
- * \n + +
- * \n + +
- * \n + +
- * \n Start Timer After n cycles Stop Timer
- * \n The TAR reister value is the number of SMCLK periods within n charge
- * and discharge cycles. This value is directly proportional to the
- * capacitance of the element measured. 'n' is defined by the variable
- * accumulation_cycles.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- #ifdef RC_PAIR_TA0
- void TI_CTS_RC_PAIR_TA0_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i;
- uint16_t j;
-
- //** Context Save
- // TIMERA0: TA0CTL
- // Port: inputPxout, inputPxdir, referencePxout, referencePxdir
-
- uint8_t contextSaveinputPxout,contextSaveinputPxdir,contextSavereferencePxout;
- uint8_t contextSavereferencePxdir;
-
- #ifdef __MSP430_HAS_SFR__
- uint16_t contextSaveTA0CTL,contextSaveTA0CCR0;
-
- contextSaveTA0CTL = TA0CTL;
- contextSaveTA0CCR0 = TA0CCR0;
- #else
- uint16_t contextSaveTACTL,contextSaveTACCR0;
-
- contextSaveTACTL = TACTL;
- contextSaveTACCR0 = TACCR0;
- #endif
-
- //** Setup Measurement timer****************************************************
- // Choices are TA0,TA1,TB0,TB1,TD0,TD1 these choices are pushed up into the
- // capacitive touch layer.
- #ifdef __MSP430_HAS_SFR__
- TA0CCR0 = 0xFFFF;
- #else
- TACCR0 = 0xFFFF;
- #endif
- for (i = 0; i<(group->numElements); i++)
- {
- // Context Save
- contextSaveinputPxout = *((group->arrayPtr[i])->inputPxoutRegister);
- contextSaveinputPxdir = *((group->arrayPtr[i])->inputPxdirRegister);
- contextSavereferencePxout = *((group->arrayPtr[i])->referencePxoutRegister);
- contextSavereferencePxdir = *((group->arrayPtr[i])->referencePxdirRegister);
- j = (group->accumulationCycles);
- #ifdef __MSP430_HAS_SFR__
- TA0CTL = TASSEL_2+TACLR; // SMCLK, up mode
- #else
- TACTL = TASSEL_2+TACLR; // SMCLK, up mode
- #endif
- while(j--)
- {
- //******************************************************************************
- // Positive cycle
- // SENSOR ---+---- Input (low to high)
- // R
- // +---- Rerefence (high)
- //******************************************************************************
- // Input low
- *((group->arrayPtr[i])->inputPxoutRegister) &= ~((group->arrayPtr[i])->inputBits);
- *((group->arrayPtr[i])->inputPxdirRegister) |= (group->arrayPtr[i])->inputBits;
- // Reference High
- *((group->arrayPtr[i])->referencePxdirRegister) |= (group->arrayPtr[i])->referenceBits;
- *((group->arrayPtr[i])->referencePxoutRegister) |= ((group->arrayPtr[i])->referenceBits);
- // Wait until low
- while((*((group->arrayPtr[i])->inputPxinRegister)) & ((group->arrayPtr[i])->inputBits));
- // Change to an input
- *((group->arrayPtr[i])->inputPxdirRegister) &= ~(group->arrayPtr[i])->inputBits;
- //**************************************************************************
- // This mechanism is traditianally an LPM with the ISR calculating the
- // delta between when the first snapshot and the ISR event. If this is
- // included within the library the entire port ISR would not be available
- // to the calling application. In this example the polling is done with the
- // CPU at expense of power and MIPS but preserves the port ISR for other
- // interruptible functions.
- //**************************************************************************
- #ifdef __MSP430_HAS_SFR__
- TA0CTL |= MC_1; // start timer
- #else
- TACTL |= MC_1; // start timer
- #endif
- //wait until voltage reaches Vih of port
- while(!((*((group->arrayPtr[i])->inputPxinRegister) & (group->arrayPtr[i])->inputBits)));
- #ifdef __MSP430_HAS_SFR__
- TA0CTL &= ~ MC_3; // stop timer
- #else
- TACTL &= ~ MC_3; // stop timer
- #endif
- //******************************************************************************
- // Negative cycle
- // SENSOR ---+---- Input (high to low)
- // R
- // +---- Rerefence (low)
- //******************************************************************************
- // Input High
- *((group->arrayPtr[i])->inputPxoutRegister) |= ((group->arrayPtr[i])->inputBits);
- *((group->arrayPtr[i])->inputPxdirRegister) |= (group->arrayPtr[i])->inputBits;
- // Reference Low
- *((group->arrayPtr[i])->referencePxoutRegister) &= ~((group->arrayPtr[i])->referenceBits);
- // Change to an input
- *((group->arrayPtr[i])->inputPxdirRegister) &= ~((group->arrayPtr[i])->inputBits);
- #ifdef __MSP430_HAS_SFR__
- TA0CTL |= MC_1; // start timer
- #else
- TACTL |= MC_1; // start timer
- #endif
- //wait until voltage reaches Vil of port
- while((*((group->arrayPtr[i])->inputPxinRegister)) & ((group->arrayPtr[i])->inputBits));
- #ifdef __MSP430_HAS_SFR__
- TA0CTL &= ~ MC_3; // stop timer
- #else
- TACTL &= ~ MC_3; // stop timer
- #endif
- } // END accumulation loop for a single element
- #ifdef __MSP430_HAS_SFR__
- counts[i] = TA0R;
- #else
- counts[i] = TAR;
- #endif
- // Context Restore
- *((group->arrayPtr[i])->inputPxoutRegister) = contextSaveinputPxout;
- *((group->arrayPtr[i])->inputPxdirRegister) = contextSaveinputPxdir;
- *((group->arrayPtr[i])->referencePxoutRegister) = contextSavereferencePxout;
- *((group->arrayPtr[i])->referencePxdirRegister) = contextSavereferencePxdir;
- } // END FOR loop which cycles through elements within sensor
-
- //** Context Restore
- #ifdef __MSP430_HAS_SFR__
- TA0CTL = contextSaveTA0CTL;
- TA0CCR0 = contextSaveTA0CCR0;
- #else
- TACTL = contextSaveTACTL;
- TACCR0 = contextSaveTACCR0;
- #endif
-
- }
- #endif
-
- /***************************************************************************//**
- * @brief fRO method capactiance measurement using the PinOsc and TimerA0
- *
- * \n Charge and Discharge Cycle
- * \n +
- * \n + +
- * \n + +
- * \n + +
- * \n + +
- * \n Start Timer After n cycles Stop Timer
- * \n The TAR reister value is the number of SW loops (function of MCLK)
- * within n charge and discharge cycles. This value is directly
- * proportional to the capacitance of the element measured. 'n' is
- * defined by the variable accumulation_cycles.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- #ifdef fRO_PINOSC_TA0_SW
- void TI_CTS_fRO_PINOSC_TA0_SW_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i;
- uint16_t j;
- //** Context Save
- // TIMERA0: TA0CTL
- // Ports: PxSEL, PxSEL2
- uint16_t contextSaveTA0CTL;
- uint8_t contextSaveSel,contextSaveSel2;
-
- contextSaveTA0CTL = TA0CTL;
- // Setup Measurement timer
- TACCR0 =(group->accumulationCycles);
- for (i =0; i< (group->numElements); i++)
- {
- j = 0;
- // Context Save
- contextSaveSel = *((group->arrayPtr[i])->inputPxselRegister);
- contextSaveSel2 = *((group->arrayPtr[i])->inputPxsel2Register);
- // start single oscillation (rise then fall and trigger on fall)
- *((group->arrayPtr[i])->inputPxselRegister) &= ~((group->arrayPtr[i])->inputBits);
- *((group->arrayPtr[i])->inputPxsel2Register) |= ((group->arrayPtr[i])->inputBits);
- TA0CTL = TASSEL_3+TACLR+MC_1; // INCLK , up mode
- // start timer in up mode
- while(!(TA0CTL & TAIFG))
- {
- j++;
- } // end accumulation
- counts[i] = j;
- TA0CTL &= ~MC_1;
- // Context Restore
- *((group->arrayPtr[i])->inputPxselRegister) = contextSaveSel;
- *((group->arrayPtr[i])->inputPxsel2Register) = contextSaveSel2;
- }
- // End Sequence
- // Context Restore
- TA0CTL = contextSaveTA0CTL;
- }
- #endif
-
- #ifdef RO_PINOSC_TA0_WDTp
- /***************************************************************************//**
- * @brief RO method capactiance measurement using PinOsc IO, TimerA0, and WDT+
- *
- * Schematic Description:
- *
- * \n element-----+->Px.y
- *
- * \n The WDT+ interval represents the measurement window. The number of
- * counts within the TA0R that have accumulated during the measurement
- * window represents the capacitance of the element.
- *
- * @param group Pointer to the structure describing the Sensor to be measured
- * @param counts Pointer to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_RO_PINOSC_TA0_WDTp_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i;
-
- //** Context Save
- // Status Register:
- // WDTp: IE1, WDTCTL
- // TIMERA0: TA0CTL, TA0CCTL1
- // Ports: PxSEL, PxSEL2
- uint8_t contextSaveSR;
- uint8_t contextSaveIE1;
- uint16_t contextSaveWDTCTL;
- uint16_t contextSaveTA0CTL,contextSaveTA0CCTL1,contextSaveTA0CCR1;
- uint8_t contextSaveSel,contextSaveSel2;
-
- contextSaveSR = __get_SR_register();
- contextSaveIE1 = IE1;
- contextSaveWDTCTL = WDTCTL;
- contextSaveWDTCTL &= 0x00FF;
- contextSaveWDTCTL |= WDTPW;
- contextSaveTA0CTL = TA0CTL;
- contextSaveTA0CCTL1 = TA0CCTL1;
- contextSaveTA0CCR1 = TA0CCR1;
-
- //** Setup Measurement timer***************************************************
- // Choices are TA0,TA1,TB0,TB1,TD0,TD1 these choices are pushed up into the
- // capacitive touch layer.
-
- // Configure and Start Timer
- TA0CTL = TASSEL_3+MC_2; // TACLK, cont mode
- TA0CCTL1 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
- IE1 |= WDTIE; // enable WDT interrupt
- for (i = 0; i<(group->numElements); i++)
- {
- // Context Save
- contextSaveSel = *((group->arrayPtr[i])->inputPxselRegister);
- contextSaveSel2 = *((group->arrayPtr[i])->inputPxsel2Register);
- // Configure Ports for relaxation oscillator
- *((group->arrayPtr[i])->inputPxselRegister) &= ~((group->arrayPtr[i])->inputBits);
- *((group->arrayPtr[i])->inputPxsel2Register) |= ((group->arrayPtr[i])->inputBits);
- //** Setup Gate Timer ********************************************************
- // Set duration of sensor measurment
- WDTCTL = (WDTPW+WDTTMSEL+group->measGateSource+group->accumulationCycles);
- TA0CTL |= TACLR; // Clear Timer_A TAR
- if(group->measGateSource == GATE_WDT_ACLK)
- {
- __bis_SR_register(LPM3_bits+GIE); // Wait for WDT interrupt
- }
- else
- {
- __bis_SR_register(LPM0_bits+GIE); // Wait for WDT interrupt
- }
- TA0CCTL1 ^= CCIS0; // Create SW capture of CCR1
- counts[i] = TA0CCR1; // Save result
- WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
- // Context Restore
- *((group->arrayPtr[i])->inputPxselRegister) = contextSaveSel;
- *((group->arrayPtr[i])->inputPxsel2Register) = contextSaveSel2;
- }
- // End Sequence
- // Context Restore
- __bis_SR_register(contextSaveSR);
- if(!(contextSaveSR & GIE))
- {
- __bic_SR_register(GIE); //
- }
- IE1 = contextSaveIE1;
- WDTCTL = contextSaveWDTCTL;
- TA0CTL = contextSaveTA0CTL;
- TA0CCTL1 = contextSaveTA0CCTL1;
- TA0CCR1 = contextSaveTA0CCR1;
- }
- #endif
-
- #ifdef RO_PINOSC_TA0
- /***************************************************************************//**
- * @brief RO method capactiance measurement using PinOsc IO, and TimerA0
- *
- * Schematic Description:
- *
- * \n element-----+->Px.y
- *
- * \n The measurement window is accumulation_cycles/ACLK. The ACLK is
- * used to generate a capture event via the internal connection CCIOB.
- * The counts within the TA0R that have accumulated during the
- * measurement window represents the capacitance of the element.
- *
- * @param group Pointer to the structure describing the Sensor to be measured
- * @param counts Pointer to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_RO_PINOSC_TA0_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i;
- uint16_t j;
- //** Context Save
- // TIMERA0: TA0CTL, TA0CCTL0
- // Ports: PxSEL, PxSEL2
- uint16_t contextSaveTA0CTL,contextSaveTA0CCTL0,contextSaveTA0CCR0;
- uint8_t contextSaveSel,contextSaveSel2;
-
- contextSaveTA0CTL = TA0CTL;
- contextSaveTA0CCTL0 = TA0CCTL0;
- contextSaveTA0CCR0 = TA0CCR0;
-
- //** Setup Measurement timer***************************************************
- // Choices are TA0,TA1,TB0,TB1,TD0,TD1 these choices are pushed up into the
- // capacitive touch layer.
-
- // Configure and Start Timer
- TA0CTL = TASSEL_3+MC_2; // TACLK, cont mode
- for (i =0; i< (group->numElements); i++)
- {
- // Context Save
- contextSaveSel = *((group->arrayPtr[i])->inputPxselRegister);
- contextSaveSel2 = *((group->arrayPtr[i])->inputPxsel2Register);
- // Configure Ports for relaxation oscillator
- j = (group->accumulationCycles);
- *((group->arrayPtr[i])->inputPxselRegister) &= ~((group->arrayPtr[i])->inputBits);
- *((group->arrayPtr[i])->inputPxsel2Register) |= ((group->arrayPtr[i])->inputBits);
- TA0CCTL0 = CM_3+CCIS_1+CAP; // Pos&Neg,ACLK (CCI0B),Cap
- while(!(TA0CCTL0 & CCIFG)); // wait for capture event
- TA0CTL |= TACLR; // Clear Timer_A TAR
- while(j--)
- {
- TA0CCTL0 = CM_3+CCIS_1+CAP; // Pos&Neg,ACLK (CCI0B),Cap
- while(!(TA0CCTL0 & CCIFG)); // wait for capture event
- }
- TA0CTL &= ~MC_2;
- counts[i] = TA0CCR0; // Save result
- // Context Restore
- *((group->arrayPtr[i])->inputPxselRegister) = contextSaveSel;
- *((group->arrayPtr[i])->inputPxsel2Register) = contextSaveSel2;
- }
- // End Sequence
- // Context Restore
- TA0CTL = contextSaveTA0CTL;
- TA0CCTL0 = contextSaveTA0CCTL0;
- TA0CCR0 = contextSaveTA0CCR0;
- }
- #endif
-
- #ifdef RO_COMPB_TA0_WDTA
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompB, TimerA0, and WDTA
- *
- * \n Schematic Description of CompB forming relaxation oscillator and
- * coupling (connection) between the relaxation oscillator and TimerA0.
- * \n <- Output
- * \n -> Input
- * \n R Resistor (typically 100Kohms)
- *
- * \n element---R----<-CBOUT/TA0CLK
- *
- * \n The WDTA interval represents the measurement window. The number of
- * counts within the TA0R that have accumulated during the measurement
- * window represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_RO_COMPB_TA0_WDTA_HAL(const struct Sensor *group, unsigned int *counts)
- {
- unsigned char i;
-
- //** Context Save
- // Status Register:
- // WDTA: IE1, WDTCTL
- // TIMERA0: TA0CTL, TA0CCTL1
- // COMPAp: CACTL1, CACTL2, CAPD
- // Ports: CboutDIR, CboutSel
- uint8_t contextSaveSR;
- uint16_t contextSaveSFRIE1;
- uint16_t contextSaveWDTCTL;
- uint16_t contextSaveTA0CTL,contextSaveTA0CCTL1,contextSaveTA0CCR1;
- uint16_t contextSaveCBCTL0,contextSaveCBCTL1;
- uint16_t contextSaveCBCTL2,contextSaveCBCTL3;
- uint8_t contextSaveCboutDir,contextSaveCboutSel;
-
- contextSaveSR = __get_SR_register();
- contextSaveSFRIE1 = SFRIE1;
- contextSaveWDTCTL = WDTCTL;
- contextSaveWDTCTL &= 0x00FF;
- contextSaveWDTCTL |= WDTPW;
- contextSaveTA0CTL = TA0CTL;
- contextSaveTA0CCTL1 = TA0CCTL1;
- contextSaveTA0CCR1 = TA0CCR1;
-
- contextSaveCBCTL0 = CBCTL0;
- contextSaveCBCTL1 = CBCTL1;
- contextSaveCBCTL2 = CBCTL2;
- contextSaveCBCTL3 = CBCTL3;
- contextSaveCboutDir = *(group->cboutTAxDirRegister);
- contextSaveCboutSel = *(group->cboutTAxSelRegister);
-
- //** Setup Measurement timer***************************************************
- // connect CBOUT with TA0
- *(group->cboutTAxDirRegister) |= (group->cboutTAxBits);
- *(group->cboutTAxSelRegister) |= (group->cboutTAxBits);
-
- CBCTL2 = CBREF14+CBREF13 + CBREF02;
-
- // Configure Timer TA0
- TA0CTL = TASSEL_0+MC_2; // TACLK, cont mode
- TA0CCTL1 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
-
- // Turn on Comparator
- CBCTL1 = CBON + CBF; // Turn on comparator with filter
- // Vcc to resistor ladder
-
- CBCTL3 |= (group->cbpdBits); // set CPD bits to disable
- // I/O buffer
- SFRIE1 |= WDTIE; // enable WDT interrupt
- CBCTL2 |= CBRS_1; // Turn on reference
- for (i = 0; i<(group->numElements); i++)
- {
- CBCTL0 = CBIMEN + (group->arrayPtr[i])->inputBits;
-
- //** Setup Gate Timer ********************************************************
- // Set duration of sensor measurment
- WDTCTL = WDTPW+WDTTMSEL+ group->measGateSource + group->accumulationCycles;
- TA0CTL |= TACLR; // Clear Timer_A TAR
- __bis_SR_register(LPM0_bits+GIE); // Wait for WDT interrupt
- TA0CCTL1 ^= CCIS0; // Create SW capture of CCR1
- counts[i] = TA0CCR1; // Save result
- WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
- }
- // End Sequence
- //** Context Restore
- // WDTA: IE1, WDCTL
- // TIMERA0: TACTL, TACCTL1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
- __bis_SR_register(contextSaveSR);
- if(!(contextSaveSR & GIE))
- {
- __bic_SR_register(GIE); // Wait for WDT interrupt
- }
- SFRIE1 = contextSaveSFRIE1;
- WDTCTL = contextSaveWDTCTL;
- TA0CTL = contextSaveTA0CTL;
- TA0CCTL1 = contextSaveTA0CCTL1;
- TA0CCR1 = contextSaveTA0CCR1;
- CBCTL0 = contextSaveCBCTL0;
- CBCTL1 = contextSaveCBCTL1;
- CBCTL2 = contextSaveCBCTL2;
- CBCTL3 = contextSaveCBCTL3;
- *(group->cboutTAxDirRegister) = contextSaveCboutDir;
- *(group->cboutTAxSelRegister) = contextSaveCboutSel;
- }
- #endif
-
- #ifdef RO_COMPB_TA1_WDTA
- /***************************************************************************//**
- * @brief RO method capactiance measurement using CompB, TimerA1, and WDTA
- *
- * Schematic Description of CompB forming relaxation oscillator and
- * coupling (connection) between the relaxation oscillator and TimerA1.
- * <- Output
- * -> Input
- * R Resistor (typically 100Kohms)
- *
- * element---R----<-CBOUT/TA1CLK
- *
- * The WDTA interval represents the measurement window. The number of
- * counts within the TA1R that have accumulated during the measurement
- * window represents the capacitance of the element.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_RO_COMPB_TA1_WDTA_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i=0;
-
- //** Context Save
- // Status Register:
- // WDTA: IE1, WDTCTL
- // TIMERA1: TA1CTL, TA1CCTL1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
- uint8_t contextSaveSR;
- uint16_t contextSaveSFRIE1;
- uint16_t contextSaveWDTCTL;
- uint16_t contextSaveTA1CTL,contextSaveTA1CCTL1,contextSaveTA1CCR1;
- uint16_t contextSaveCBCTL0,contextSaveCBCTL1;
- uint16_t contextSaveCBCTL2,contextSaveCBCTL3;
- uint8_t contextSaveCboutDir,contextSaveCboutSel;
-
- contextSaveSR = __get_SR_register();
- contextSaveSFRIE1 = SFRIE1;
- contextSaveWDTCTL = WDTCTL;
- contextSaveWDTCTL &= 0x00FF;
- contextSaveWDTCTL |= WDTPW;
- contextSaveTA1CTL = TA1CTL;
- contextSaveTA1CCTL1 = TA1CCTL1;
- contextSaveTA1CCR1 = TA1CCR1;
-
- contextSaveCBCTL0 = CBCTL0;
- contextSaveCBCTL1 = CBCTL1;
- contextSaveCBCTL2 = CBCTL2;
- contextSaveCBCTL3 = CBCTL3;
- contextSaveCboutDir = *(group->cboutTAxDirRegister);
- contextSaveCboutSel = *(group->cboutTAxSelRegister);
-
- //** Setup Measurement timer***************************************************
- // connect CBOUT with TA1
- *(group->cboutTAxDirRegister) |= (group->cboutTAxBits);
- *(group->cboutTAxSelRegister) |= (group->cboutTAxBits);
- // Setup Comparator
- CBCTL2 = CBREF14+CBREF13 + CBREF02;
- // Configure Timer TA1
- TA1CTL = TASSEL_0+MC_2; // TACLK, cont mode
- TA1CCTL1 = CM_3+CCIS_2+CAP; // Pos&Neg,GND,Cap
- // Turn on Comparator
- CBCTL1 = CBON + CBF; // Turn on comparator with filter
- CBCTL3 |= (group->cbpdBits); // set CPD bits to disable
- SFRIE1 |= WDTIE; // enable WDT interrupt
- CBCTL2 |= CBRS_1; // Turn on reference
- for (i = 0; i<(group->numElements); i++)
- {
- CBCTL0 = CBIMEN + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer ********************************************************
- // Set duration of sensor measurment
- WDTCTL = WDTPW+WDTTMSEL+WDTCNTCL+ group->measGateSource + group->sourceScale;
- TA1CTL |= TACLR; // Clear Timer_A TAR
- __bis_SR_register(LPM0_bits+GIE); // Wait for WDT interrupt
- TA1CCTL1 ^= CCIS0; // Create SW capture of CCR1
- counts[i] = TA1CCR1; // Save result
- WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
- CBCTL3 &= ~((group->arrayPtr[i])->inputBits);
- }
- // End Sequence
- //** Context Restore
- // WDTA: IE1, WDCTL
- // TIMERA0: TACTL, TACCTL1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
- __bis_SR_register(contextSaveSR);
- if(!(contextSaveSR & GIE))
- {
- __bic_SR_register(GIE); // Wait for WDT interrupt
- }
- SFRIE1 = contextSaveSFRIE1;
- WDTCTL = contextSaveWDTCTL;
- TA1CTL = contextSaveTA1CTL;
- TA1CCTL1 = contextSaveTA1CCTL1;
- TA1CCR1 = contextSaveTA1CCR1;
- CBCTL0 = contextSaveCBCTL0;
- CBCTL1 = contextSaveCBCTL1;
- CBCTL2 = contextSaveCBCTL2;
- CBCTL3 = contextSaveCBCTL3;
- *(group->cboutTAxDirRegister) = contextSaveCboutDir;
- *(group->cboutTAxSelRegister) = contextSaveCboutSel;
- }
- #endif
-
- #ifdef fRO_COMPB_TA0_SW
- /***************************************************************************//**
- * @brief fRO method capactiance measurement using CompB, TimerA0
- *
- * Schematic Description of CompB forming relaxation oscillator and
- * coupling (connection) between the relaxation oscillator and TimerA0.
- * <- Output
- * -> Input
- * R Resistor (typically 100Kohms)
- *
- * element---R----<-CBOUT
- *
- * The TAR reister value is the number of SW loops (function of MCLK)
- * within n charge and discharge cycles. This value is directly
- * proportional to the capacitance of the element measured. 'n' is
- * defined by the variable accumulation_cycles.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_fRO_COMPB_TA0_SW_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i;
- uint16_t j;
-
- //** Context Save
- // TIMERA0: TA0CTL, TA0CCR1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
-
- uint16_t contextSaveTA0CTL,contextSaveTA0CCR0;
- uint16_t contextSaveCBCTL0,contextSaveCBCTL1;
- uint16_t contextSaveCBCTL2,contextSaveCBCTL3;
- uint8_t contextSaveCboutDir,contextSaveCboutSel;
-
- contextSaveTA0CTL = TA0CTL;
- contextSaveTA0CCR0 = TA0CCR0;
-
- contextSaveCBCTL0 = CBCTL0;
- contextSaveCBCTL1 = CBCTL1;
- contextSaveCBCTL2 = CBCTL2;
- contextSaveCBCTL3 = CBCTL3;
- contextSaveCboutDir = *(group->cboutTAxDirRegister);
- contextSaveCboutSel = *(group->cboutTAxSelRegister);
- //** Setup Measurement timer***************************************************
- // connect CBOUT with TA0
- *(group->cboutTAxDirRegister) |= (group->cboutTAxBits);
- *(group->cboutTAxSelRegister) |= (group->cboutTAxBits);
- CBCTL2 = CBREF14+CBREF13 + CBREF02;
- // Configure Timer TA0
- TA0CCR0 =(group->accumulationCycles);
-
- // Turn on Comparator
- CBCTL1 = CBON + CBF; // Turn on comparator with filter
- // Vcc to resistor ladder
- CBCTL3 |= (group->cbpdBits); // set CPD bits to disable
- // I/O buffer
- CBCTL2 |= CBRS_1; // Turn on reference
- for (i = 0; i<(group->numElements); i++)
- {
- j=0;
- CBCTL0 = CBIMEN + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer ********************************************************
- // Set duration of sensor measurment
- TA0CTL = TASSEL_0+TACLR+MC_1; // TACLK
- while(!(TA0CTL & TAIFG))
- {
- j++;
- } // end accumulation
- counts[i] = j;
- }
- // End Sequence
- //** Context Restore
- // TIMERA0: TACTL, TACCTL1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
- TA0CTL = contextSaveTA0CTL;
- TA0CCR0 = contextSaveTA0CCR0;
- CBCTL0 = contextSaveCBCTL0;
- CBCTL1 = contextSaveCBCTL1;
- CBCTL2 = contextSaveCBCTL2;
- CBCTL3 = contextSaveCBCTL3;
- *(group->cboutTAxDirRegister) = contextSaveCboutDir;
- *(group->cboutTAxSelRegister) = contextSaveCboutSel;
- }
- #endif
-
- #ifdef fRO_COMPB_TA1_SW
- /***************************************************************************//**
- * @brief fRO method capactiance measurement using CompB, TimerA1
- *
- * Schematic Description of CompB forming relaxation oscillator and
- * coupling (connection) between the relaxation oscillator and TimerA1.
- * <- Output
- * -> Input
- * R Resistor (typically 100Kohms)
- *
- * element---R----<-CBOUT
- *
- * The TAR reister value is the number of SW loops (function of MCLK)
- * within n charge and discharge cycles. This value is directly
- * proportional to the capacitance of the element measured. 'n' is
- * defined by the variable accumulation_cycles.
- *
- * @param group Address of the structure describing the Sensor to be measured
- * @param counts Address to where the measurements are to be written
- * @return none
- ******************************************************************************/
- void TI_CTS_fRO_COMPB_TA1_SW_HAL(const struct Sensor *group, unsigned int *counts)
- {
- uint8_t i;
- uint16_t j;
- //** Context Save
- // TIMERA0: TA1CTL, TA1CCTL1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
-
- uint16_t contextSaveTA1CTL,contextSaveTA1CCR0;
- uint16_t contextSaveCBCTL0,contextSaveCBCTL1;
- uint16_t contextSaveCBCTL2,contextSaveCBCTL3;
- uint8_t contextSaveCboutDir,contextSaveCboutSel;
-
- contextSaveTA1CTL = TA1CTL;
- contextSaveTA1CCR0 = TA1CCR0;
-
- contextSaveCBCTL0 = CBCTL0;
- contextSaveCBCTL1 = CBCTL1;
- contextSaveCBCTL2 = CBCTL2;
- contextSaveCBCTL3 = CBCTL3;
- contextSaveCboutDir = *(group->cboutTAxDirRegister);
- contextSaveCboutSel = *(group->cboutTAxSelRegister);
- //** Setup Measurement timer***************************************************
- // connect CBOUT with TA1
- *(group->cboutTAxDirRegister) |= (group->cboutTAxBits);
- *(group->cboutTAxSelRegister) |= (group->cboutTAxBits);
- CBCTL2 = CBREF14+CBREF13 + CBREF02;
- // Configure Timer TA1
- TA1CCR0 =(group->accumulationCycles);
-
- // Turn on Comparator
- CBCTL1 = CBON + CBF; // Turn on comparator with filter
- // Vcc to resistor ladder
- CBCTL3 |= (group->cbpdBits); // set CPD bits to disable
- // I/O buffer
- CBCTL2 |= CBRS_1; // Turn on reference
- for (i = 0; i<(group->numElements); i++)
- {
- j=0;
- CBCTL0 = CBIMEN + (group->arrayPtr[i])->inputBits;
- //** Setup Gate Timer ********************************************************
- // Set duration of sensor measurment
- TA1CTL = TASSEL_0+TACLR+MC_1; // TACLK
- while(!(TA1CTL & TAIFG))
- {
- j++;
- } // end accumulation
- counts[i] = j;
- //P1SEL &=~BIT4;
- }
- // End Sequence
- //** Context Restore
- // TIMERA0: TACTL, TACCTL1
- // COMPB: CBCTL0, CBCTL1, CBCTL2, CBCTL3
- // Ports: CboutDIR, CboutSel
- TA1CTL = contextSaveTA1CTL;
- TA1CCR0 = contextSaveTA1CCR0;
- CBCTL0 = contextSaveCBCTL0;
- CBCTL1 = contextSaveCBCTL1;
- CBCTL2 = contextSaveCBCTL2;
- CBCTL3 = contextSaveCBCTL3;
- *(group->cboutTAxDirRegister) = contextSaveCboutDir;
- *(group->cboutTAxSelRegister) = contextSaveCboutSel;
- }
- #endif
-
- #ifdef WDT_GATE
- // Watchdog Timer interrupt service routine
- #pragma vector=WDT_VECTOR
- __interrupt void watchdog_timer(void)
- {
- __bic_SR_register_on_exit(LPM3_bits); // Exit LPM3 on reti
- }
- #endif
-
- /***************************************************************************//**
- * @}
- ******************************************************************************/
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