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//***************************************************************************** | |
// | |
// timer_a.c - Driver for the timer_a Module. | |
// | |
//***************************************************************************** | |
//***************************************************************************** | |
// | |
//! \addtogroup timer_a_api timer_a | |
//! @{ | |
// | |
//***************************************************************************** | |
#include "inc/hw_regaccess.h" | |
#include "inc/hw_memmap.h" | |
#ifdef __MSP430_HAS_TxA7__ | |
#include "timer_a.h" | |
#include <assert.h> | |
void Timer_A_startCounter(uint16_t baseAddress, | |
uint16_t timerMode) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) |= timerMode; | |
} | |
void Timer_A_initContinuousMode(uint16_t baseAddress, | |
Timer_A_initContinuousModeParam *param) | |
{ | |
HWREG16(baseAddress + | |
OFS_TAxCTL) &= ~(TIMER_A_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK + | |
TIMER_A_UPDOWN_MODE + | |
TIMER_A_DO_CLEAR + | |
TIMER_A_TAIE_INTERRUPT_ENABLE + | |
ID__8 | |
); | |
HWREG16(baseAddress + OFS_TAxEX0) &= ~TAIDEX_7; | |
HWREG16(baseAddress + OFS_TAxEX0) |= param->clockSourceDivider & 0x7; | |
HWREG16(baseAddress + OFS_TAxCTL) |= (param->clockSource + | |
param->timerClear + | |
param->timerInterruptEnable_TAIE + | |
((param->clockSourceDivider >> | |
3) << 6)); | |
if(param->startTimer) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) |= TIMER_A_CONTINUOUS_MODE; | |
} | |
} | |
void Timer_A_initUpMode(uint16_t baseAddress, | |
Timer_A_initUpModeParam *param) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) &= | |
~(TIMER_A_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK + | |
TIMER_A_UPDOWN_MODE + | |
TIMER_A_DO_CLEAR + | |
TIMER_A_TAIE_INTERRUPT_ENABLE + | |
ID__8 | |
); | |
HWREG16(baseAddress + OFS_TAxEX0) &= ~TAIDEX_7; | |
HWREG16(baseAddress + OFS_TAxEX0) |= param->clockSourceDivider & 0x7; | |
HWREG16(baseAddress + OFS_TAxCTL) |= (param->clockSource + | |
param->timerClear + | |
param->timerInterruptEnable_TAIE + | |
((param->clockSourceDivider >> | |
3) << 6)); | |
if(param->startTimer) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) |= TIMER_A_UP_MODE; | |
} | |
if(TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE == | |
param->captureCompareInterruptEnable_CCR0_CCIE) | |
{ | |
HWREG16(baseAddress + | |
OFS_TAxCCTL0) |= TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE; | |
} | |
else | |
{ | |
HWREG16(baseAddress + | |
OFS_TAxCCTL0) &= ~TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE; | |
} | |
HWREG16(baseAddress + OFS_TAxCCR0) = param->timerPeriod; | |
} | |
void Timer_A_initUpDownMode(uint16_t baseAddress, | |
Timer_A_initUpDownModeParam *param) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) &= | |
~(TIMER_A_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK + | |
TIMER_A_UPDOWN_MODE + | |
TIMER_A_DO_CLEAR + | |
TIMER_A_TAIE_INTERRUPT_ENABLE + | |
ID__8 | |
); | |
HWREG16(baseAddress + OFS_TAxEX0) &= ~TAIDEX_7; | |
HWREG16(baseAddress + OFS_TAxEX0) |= param->clockSourceDivider & 0x7; | |
HWREG16(baseAddress + OFS_TAxCTL) |= (param->clockSource + | |
param->timerClear + | |
param->timerInterruptEnable_TAIE + | |
((param->clockSourceDivider >> | |
3) << 6)); | |
if(param->startTimer) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) |= TIMER_A_UPDOWN_MODE; | |
} | |
if(TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE == | |
param->captureCompareInterruptEnable_CCR0_CCIE) | |
{ | |
HWREG16(baseAddress + | |
OFS_TAxCCTL0) |= TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE; | |
} | |
else | |
{ | |
HWREG16(baseAddress + | |
OFS_TAxCCTL0) &= ~TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE; | |
} | |
HWREG16(baseAddress + OFS_TAxCCR0) = param->timerPeriod; | |
} | |
void Timer_A_initCaptureMode(uint16_t baseAddress, | |
Timer_A_initCaptureModeParam *param) | |
{ | |
HWREG16(baseAddress + param->captureRegister) |= CAP; | |
HWREG16(baseAddress + param->captureRegister) &= | |
~(TIMER_A_CAPTUREMODE_RISING_AND_FALLING_EDGE + | |
TIMER_A_CAPTURE_INPUTSELECT_Vcc + | |
TIMER_A_CAPTURE_SYNCHRONOUS + | |
TIMER_A_DO_CLEAR + | |
TIMER_A_TAIE_INTERRUPT_ENABLE + | |
CM_3 | |
); | |
HWREG16(baseAddress + param->captureRegister) |= (param->captureMode + | |
param->captureInputSelect | |
+ | |
param-> | |
synchronizeCaptureSource + | |
param-> | |
captureInterruptEnable + | |
param->captureOutputMode | |
); | |
} | |
void Timer_A_initCompareMode(uint16_t baseAddress, | |
Timer_A_initCompareModeParam *param) | |
{ | |
HWREG16(baseAddress + param->compareRegister) &= ~CAP; | |
HWREG16(baseAddress + param->compareRegister) &= | |
~(TIMER_A_CAPTURECOMPARE_INTERRUPT_ENABLE + | |
TIMER_A_OUTPUTMODE_RESET_SET | |
); | |
HWREG16(baseAddress + | |
param->compareRegister) |= (param->compareInterruptEnable + | |
param->compareOutputMode | |
); | |
HWREG16(baseAddress + param->compareRegister + | |
OFS_TAxR) = param->compareValue; | |
} | |
void Timer_A_enableInterrupt(uint16_t baseAddress) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) |= TAIE; | |
} | |
void Timer_A_disableInterrupt(uint16_t baseAddress) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) &= ~TAIE; | |
} | |
uint32_t Timer_A_getInterruptStatus(uint16_t baseAddress) | |
{ | |
return (HWREG16(baseAddress + OFS_TAxCTL) & TAIFG); | |
} | |
void Timer_A_enableCaptureCompareInterrupt(uint16_t baseAddress, | |
uint16_t captureCompareRegister) | |
{ | |
HWREG16(baseAddress + captureCompareRegister) |= CCIE; | |
} | |
void Timer_A_disableCaptureCompareInterrupt(uint16_t baseAddress, | |
uint16_t captureCompareRegister) | |
{ | |
HWREG16(baseAddress + captureCompareRegister) &= ~CCIE; | |
} | |
uint32_t Timer_A_getCaptureCompareInterruptStatus(uint16_t baseAddress, | |
uint16_t captureCompareRegister, | |
uint16_t mask) | |
{ | |
return (HWREG16(baseAddress + captureCompareRegister) & mask); | |
} | |
void Timer_A_clear(uint16_t baseAddress) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) |= TACLR; | |
} | |
uint8_t Timer_A_getSynchronizedCaptureCompareInput(uint16_t baseAddress, | |
uint16_t captureCompareRegister, | |
uint16_t synchronized) | |
{ | |
if(HWREG16(baseAddress + captureCompareRegister) & synchronized) | |
{ | |
return (TIMER_A_CAPTURECOMPARE_INPUT_HIGH); | |
} | |
else | |
{ | |
return (TIMER_A_CAPTURECOMPARE_INPUT_LOW); | |
} | |
} | |
uint8_t Timer_A_getOutputForOutputModeOutBitValue(uint16_t baseAddress, | |
uint16_t captureCompareRegister) | |
{ | |
if(HWREG16(baseAddress + captureCompareRegister) & OUT) | |
{ | |
return (TIMER_A_OUTPUTMODE_OUTBITVALUE_HIGH); | |
} | |
else | |
{ | |
return (TIMER_A_OUTPUTMODE_OUTBITVALUE_LOW); | |
} | |
} | |
uint16_t Timer_A_getCaptureCompareCount(uint16_t baseAddress, | |
uint16_t captureCompareRegister) | |
{ | |
return (HWREG16(baseAddress + OFS_TAxR + captureCompareRegister)); | |
} | |
void Timer_A_setOutputForOutputModeOutBitValue(uint16_t baseAddress, | |
uint16_t captureCompareRegister, | |
uint8_t outputModeOutBitValue) | |
{ | |
HWREG16(baseAddress + captureCompareRegister) &= ~OUT; | |
HWREG16(baseAddress + captureCompareRegister) |= outputModeOutBitValue; | |
} | |
void Timer_A_outputPWM(uint16_t baseAddress, | |
Timer_A_outputPWMParam *param) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) &= | |
~(TIMER_A_CLOCKSOURCE_INVERTED_EXTERNAL_TXCLK + | |
TIMER_A_UPDOWN_MODE + TIMER_A_DO_CLEAR + | |
TIMER_A_TAIE_INTERRUPT_ENABLE + | |
ID__8 | |
); | |
HWREG16(baseAddress + OFS_TAxEX0) &= ~TAIDEX_7; | |
HWREG16(baseAddress + OFS_TAxEX0) |= param->clockSourceDivider & 0x7; | |
HWREG16(baseAddress + OFS_TAxCTL) |= (param->clockSource + | |
TIMER_A_UP_MODE + | |
TIMER_A_DO_CLEAR + | |
((param->clockSourceDivider >> | |
3) << 6)); | |
HWREG16(baseAddress + OFS_TAxCCR0) = param->timerPeriod; | |
HWREG16(baseAddress + OFS_TAxCCTL0) &= | |
~(TIMER_A_CAPTURECOMPARE_INTERRUPT_ENABLE + | |
TIMER_A_OUTPUTMODE_RESET_SET); | |
HWREG16(baseAddress + param->compareRegister) |= param->compareOutputMode; | |
HWREG16(baseAddress + param->compareRegister + OFS_TAxR) = param->dutyCycle; | |
} | |
void Timer_A_stop(uint16_t baseAddress) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) &= ~MC_3; | |
} | |
void Timer_A_setCompareValue(uint16_t baseAddress, | |
uint16_t compareRegister, | |
uint16_t compareValue) | |
{ | |
HWREG16(baseAddress + compareRegister + OFS_TAxR) = compareValue; | |
} | |
void Timer_A_clearTimerInterrupt(uint16_t baseAddress) | |
{ | |
HWREG16(baseAddress + OFS_TAxCTL) &= ~TAIFG; | |
} | |
void Timer_A_clearCaptureCompareInterrupt(uint16_t baseAddress, | |
uint16_t captureCompareRegister) | |
{ | |
HWREG16(baseAddress + captureCompareRegister) &= ~CCIFG; | |
} | |
uint16_t Timer_A_getCounterValue(uint16_t baseAddress) | |
{ | |
uint16_t voteOne, voteTwo, res; | |
voteTwo = HWREG16(baseAddress + OFS_TAxR); | |
do | |
{ | |
voteOne = voteTwo; | |
voteTwo = HWREG16(baseAddress + OFS_TAxR); | |
if(voteTwo > voteOne) | |
{ | |
res = voteTwo - voteOne; | |
} | |
else if(voteOne > voteTwo) | |
{ | |
res = voteOne - voteTwo; | |
} | |
else | |
{ | |
res = 0; | |
} | |
} | |
while(res > TIMER_A_THRESHOLD); | |
return(voteTwo); | |
} | |
#endif | |
//***************************************************************************** | |
// | |
//! Close the doxygen group for timer_a_api | |
//! @} | |
// | |
//***************************************************************************** |