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402 lines
14 KiB
C
402 lines
14 KiB
C
/* --COPYRIGHT--,BSD
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* Copyright (c) 2014, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* --/COPYRIGHT--*/
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//*****************************************************************************
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//
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// timer_b.c - Driver for the timer_b Module.
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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//! \addtogroup timer_b_api timer_b
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//! @{
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//
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//*****************************************************************************
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#include "inc/hw_regaccess.h"
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#include "inc/hw_memmap.h"
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#ifdef __MSP430_HAS_TxB7__
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#include "timer_b.h"
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#include <assert.h>
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void Timer_B_startCounter(uint16_t baseAddress,
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uint16_t timerMode)
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{
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HWREG16(baseAddress + OFS_TBxCTL) |= timerMode;
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}
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void Timer_B_initContinuousMode(uint16_t baseAddress,
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Timer_B_initContinuousModeParam *param)
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{
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HWREG16(baseAddress +
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OFS_TBxCTL) &= ~(TIMER_B_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK +
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TIMER_B_UPDOWN_MODE +
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TIMER_B_DO_CLEAR +
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TIMER_B_TBIE_INTERRUPT_ENABLE +
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CNTL_3 +
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ID__8
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);
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HWREG16(baseAddress + OFS_TBxEX0) &= ~TBIDEX_7;
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HWREG16(baseAddress + OFS_TBxEX0) |= param->clockSourceDivider & 0x7;
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HWREG16(baseAddress + OFS_TBxCTL) |= (param->clockSource +
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param->timerClear +
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param->timerInterruptEnable_TBIE +
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((param->clockSourceDivider >>
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3) << 6));
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if(param->startTimer)
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{
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HWREG16(baseAddress + OFS_TBxCTL) |= TIMER_B_CONTINUOUS_MODE;
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}
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}
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void Timer_B_initUpMode(uint16_t baseAddress,
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Timer_B_initUpModeParam *param)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &=
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~(TIMER_B_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK +
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TIMER_B_UPDOWN_MODE +
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TIMER_B_DO_CLEAR +
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TIMER_B_TBIE_INTERRUPT_ENABLE +
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CNTL_3
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);
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HWREG16(baseAddress + OFS_TBxEX0) &= ~TBIDEX_7;
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HWREG16(baseAddress + OFS_TBxEX0) |= param->clockSourceDivider & 0x7;
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HWREG16(baseAddress + OFS_TBxCTL) |= (param->clockSource +
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param->timerClear +
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param->timerInterruptEnable_TBIE +
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((param->clockSourceDivider >>
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3) << 6));
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if(param->startTimer)
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{
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HWREG16(baseAddress + OFS_TBxCTL) |= TIMER_B_UP_MODE;
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}
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if(TIMER_B_CCIE_CCR0_INTERRUPT_ENABLE ==
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param->captureCompareInterruptEnable_CCR0_CCIE)
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{
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HWREG16(baseAddress +
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OFS_TBxCCTL0) |= TIMER_B_CCIE_CCR0_INTERRUPT_ENABLE;
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}
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else
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{
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HWREG16(baseAddress +
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OFS_TBxCCTL0) &= ~TIMER_B_CCIE_CCR0_INTERRUPT_ENABLE;
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}
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HWREG16(baseAddress + OFS_TBxCCR0) = param->timerPeriod;
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}
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void Timer_B_initUpDownMode(uint16_t baseAddress,
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Timer_B_initUpDownModeParam *param)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &=
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~(TIMER_B_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK +
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TIMER_B_UPDOWN_MODE +
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TIMER_B_DO_CLEAR +
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TIMER_B_TBIE_INTERRUPT_ENABLE +
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CNTL_3
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);
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HWREG16(baseAddress + OFS_TBxEX0) &= ~TBIDEX_7;
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HWREG16(baseAddress + OFS_TBxEX0) |= param->clockSourceDivider & 0x7;
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HWREG16(baseAddress + OFS_TBxCTL) |= (param->clockSource +
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TIMER_B_STOP_MODE +
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param->timerClear +
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param->timerInterruptEnable_TBIE +
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((param->clockSourceDivider >>
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3) << 6));
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if(param->startTimer)
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{
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HWREG16(baseAddress + OFS_TBxCTL) |= TIMER_B_UPDOWN_MODE;
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}
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if(TIMER_B_CCIE_CCR0_INTERRUPT_ENABLE ==
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param->captureCompareInterruptEnable_CCR0_CCIE)
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{
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HWREG16(baseAddress +
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OFS_TBxCCTL0) |= TIMER_B_CCIE_CCR0_INTERRUPT_ENABLE;
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}
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else
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{
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HWREG16(baseAddress +
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OFS_TBxCCTL0) &= ~TIMER_B_CCIE_CCR0_INTERRUPT_ENABLE;
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}
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HWREG16(baseAddress + OFS_TBxCCR0) = param->timerPeriod;
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}
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void Timer_B_initCaptureMode(uint16_t baseAddress,
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Timer_B_initCaptureModeParam *param)
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{
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HWREG16(baseAddress + param->captureRegister) |= CAP;
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HWREG16(baseAddress + param->captureRegister) &=
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~(TIMER_B_CAPTUREMODE_RISING_AND_FALLING_EDGE +
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TIMER_B_CAPTURE_INPUTSELECT_Vcc +
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TIMER_B_CAPTURE_SYNCHRONOUS +
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TIMER_B_DO_CLEAR +
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TIMER_B_TBIE_INTERRUPT_ENABLE +
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CM_3
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);
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HWREG16(baseAddress + param->captureRegister) |= (param->captureMode +
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param->captureInputSelect
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+
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param->
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synchronizeCaptureSource +
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param->
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captureInterruptEnable +
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param->captureOutputMode
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);
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}
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void Timer_B_initCompareMode(uint16_t baseAddress,
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Timer_B_initCompareModeParam *param)
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{
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HWREG16(baseAddress + param->compareRegister) &= ~CAP;
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HWREG16(baseAddress + param->compareRegister) &=
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~(TIMER_B_CAPTURECOMPARE_INTERRUPT_ENABLE +
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TIMER_B_OUTPUTMODE_RESET_SET
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);
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HWREG16(baseAddress +
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param->compareRegister) |= (param->compareInterruptEnable +
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param->compareOutputMode
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);
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HWREG16(baseAddress + param->compareRegister +
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OFS_TBxR) = param->compareValue;
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}
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void Timer_B_enableInterrupt(uint16_t baseAddress)
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{
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HWREG16(baseAddress + OFS_TBxCTL) |= TBIE;
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}
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void Timer_B_disableInterrupt(uint16_t baseAddress)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &= ~TBIE;
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}
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uint32_t Timer_B_getInterruptStatus(uint16_t baseAddress)
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{
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return (HWREG16(baseAddress + OFS_TBxCTL) & TBIFG);
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}
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void Timer_B_enableCaptureCompareInterrupt(uint16_t baseAddress,
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uint16_t captureCompareRegister)
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{
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HWREG16(baseAddress + captureCompareRegister) |= CCIE;
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}
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void Timer_B_disableCaptureCompareInterrupt(uint16_t baseAddress,
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uint16_t captureCompareRegister)
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{
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HWREG16(baseAddress + captureCompareRegister) &= ~CCIE;
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}
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uint32_t Timer_B_getCaptureCompareInterruptStatus(uint16_t baseAddress,
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uint16_t captureCompareRegister,
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uint16_t mask)
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{
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return (HWREG16(baseAddress + captureCompareRegister) & mask);
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}
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void Timer_B_clear(uint16_t baseAddress)
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{
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HWREG16(baseAddress + OFS_TBxCTL) |= TBCLR;
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}
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uint8_t Timer_B_getSynchronizedCaptureCompareInput(uint16_t baseAddress,
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uint16_t captureCompareRegister,
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uint16_t synchronized)
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{
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if(HWREG16(baseAddress + captureCompareRegister) & synchronized)
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{
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return (TIMER_B_CAPTURECOMPARE_INPUT_HIGH);
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}
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else
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{
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return (TIMER_B_CAPTURECOMPARE_INPUT_LOW);
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}
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}
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uint8_t Timer_B_getOutputForOutputModeOutBitValue(uint16_t baseAddress,
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uint16_t captureCompareRegister)
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{
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if(HWREG16(baseAddress + captureCompareRegister) & OUT)
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{
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return (TIMER_B_OUTPUTMODE_OUTBITVALUE_HIGH);
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}
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else
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{
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return (TIMER_B_OUTPUTMODE_OUTBITVALUE_LOW);
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}
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}
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uint16_t Timer_B_getCaptureCompareCount(uint16_t baseAddress,
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uint16_t captureCompareRegister)
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{
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return (HWREG16(baseAddress + OFS_TBxR + captureCompareRegister));
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}
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void Timer_B_setOutputForOutputModeOutBitValue(uint16_t baseAddress,
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uint16_t captureCompareRegister,
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uint8_t outputModeOutBitValue)
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{
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HWREG16(baseAddress + captureCompareRegister) &= ~OUT;
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HWREG16(baseAddress + captureCompareRegister) |= outputModeOutBitValue;
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}
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void Timer_B_outputPWM(uint16_t baseAddress,
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Timer_B_outputPWMParam *param)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &=
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~(TIMER_B_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK +
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TIMER_B_UPDOWN_MODE + TIMER_B_DO_CLEAR +
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TIMER_B_TBIE_INTERRUPT_ENABLE
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);
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HWREG16(baseAddress + OFS_TBxEX0) &= ~TBIDEX_7;
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HWREG16(baseAddress + OFS_TBxEX0) |= param->clockSourceDivider & 0x7;
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HWREG16(baseAddress + OFS_TBxCTL) |= (param->clockSource +
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TIMER_B_UP_MODE +
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TIMER_B_DO_CLEAR +
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((param->clockSourceDivider >>
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3) << 6));
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HWREG16(baseAddress + OFS_TBxCCR0) = param->timerPeriod;
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HWREG16(baseAddress + OFS_TBxCCTL0) &=
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~(TIMER_B_CAPTURECOMPARE_INTERRUPT_ENABLE +
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TIMER_B_OUTPUTMODE_RESET_SET
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);
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HWREG16(baseAddress + param->compareRegister) |= param->compareOutputMode;
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HWREG16(baseAddress + param->compareRegister + OFS_TBxR) = param->dutyCycle;
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}
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void Timer_B_stop(uint16_t baseAddress)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &= ~MC_3;
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}
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void Timer_B_setCompareValue(uint16_t baseAddress,
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uint16_t compareRegister,
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uint16_t compareValue)
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{
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HWREG16(baseAddress + compareRegister + OFS_TBxR) = compareValue;
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}
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void Timer_B_clearTimerInterrupt(uint16_t baseAddress)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &= ~TBIFG;
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}
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void Timer_B_clearCaptureCompareInterrupt(uint16_t baseAddress,
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uint16_t captureCompareRegister)
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{
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HWREG16(baseAddress + captureCompareRegister) &= ~CCIFG;
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}
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void Timer_B_selectCounterLength(uint16_t baseAddress,
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uint16_t counterLength)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &= ~CNTL_3;
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HWREG16(baseAddress + OFS_TBxCTL) |= counterLength;
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}
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void Timer_B_selectLatchingGroup(uint16_t baseAddress,
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uint16_t groupLatch)
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{
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HWREG16(baseAddress + OFS_TBxCTL) &= ~TBCLGRP_3;
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HWREG16(baseAddress + OFS_TBxCTL) |= groupLatch;
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}
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void Timer_B_initCompareLatchLoadEvent(uint16_t baseAddress,
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uint16_t compareRegister,
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uint16_t compareLatchLoadEvent)
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{
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HWREG16(baseAddress + compareRegister) &= ~CLLD_3;
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HWREG16(baseAddress + compareRegister) |= compareLatchLoadEvent;
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}
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uint16_t Timer_B_getCounterValue(uint16_t baseAddress)
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{
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uint16_t voteOne, voteTwo, res;
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voteTwo = HWREG16(baseAddress + OFS_TBxR);
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do
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{
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voteOne = voteTwo;
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voteTwo = HWREG16(baseAddress + OFS_TBxR);
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if(voteTwo > voteOne)
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{
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res = voteTwo - voteOne;
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}
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else if(voteOne > voteTwo)
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{
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res = voteOne - voteTwo;
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}
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else
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{
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res = 0;
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}
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}
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while(res > TIMER_B_THRESHOLD);
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return(voteTwo);
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}
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#endif
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//*****************************************************************************
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//
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//! Close the doxygen group for timer_b_api
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//! @}
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//
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//*****************************************************************************
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