Потому что таймер стоит и не считает. Запишите значение МС_1 в TBCTL. Кроме того, TBCL0=0 дефолтно и для запуска таймера там должно быть ненулевое значение. Ну и ещё этот таймер, согласно конфигурации тактируется от ACLK. Чему равна эта частота (из кода определить это невозможно)?почему код по захвату у меня не заходит в прерывание
Код: Выделить всё
#include "io430.h"
void Clock_config(); // function prototypes
void Ports_config();
void TimerA_config();
unsigned int lastCapture;
unsigned int duration; // button press duration
int main()
{
WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer
Clock_config(); // set 8 MHz MSCK, 2 MHz SMCLK
Ports_config(); // set up ports for GPIO
TimerA_config(); // configure TimerA module capture
__enable_interrupt(); // enable interrupts globally
while(1)
{
__low_power_mode_0(); // wait for capture
__no_operation();
__no_operation(); // set breakpoint here to examine duration
}
}
void Clock_config() // configure basic clock module
{
DCOCTL = CALDCO_8MHZ; // set 8 MHz MCLK
BCSCTL1 = CALBC1_8MHZ;
BCSCTL2 = DIVS_1;
BCSCTL3 = LFXT1S1; // select VLO as ACLK
}
void Ports_config()
{
P1SEL = P1; // assign P1.1 to TimerA input
P1DIR &= ~P1; // and configure it for capture
P1REN = P1; // enable pull-up resistor
P1OUT = P1;
}
void TimerA_config()
{
TA0CCTL0 = CM_3 | SCS | CAP | CCIE;
TA0CTL = TASSEL_1 + MC_2 + TACLR;
}
#pragma vector=TIMER0_A0_VECTOR // TimerA handler
__interrupt void TimerA_ISR(void)
{
if (P1IN & P1) // button is released
{
duration = TACCR0 - lastCapture;
__low_power_mode_off_on_exit();
}
lastCapture = TACCR0;
TA0CCTL0_bit.CCIFG = 0; // clear TimerA capture
} Код: Выделить всё
#include "io430.h"
void Clock_config(); // function prototypes
void Ports_config();
void TimerB_config();
unsigned int lastCapture;
unsigned int duration; // button press duration
int main()
{
WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer
REFCTL0_L |= REFTCOFF; // disable temp sensor
Ports_config(); // set up ports for GPIO
Clock_config(); // set 8 MHz MSCK, 1 MHz SMCLK
TimerB_config(); // configure TimerB module capture
__enable_interrupt(); // enable interrupts globally
while(1)
{
__low_power_mode_0(); // wait for capture
__no_operation();
__no_operation(); // set breakpoint here to examine duration
}
}
void Clock_config() // configure clock system
{
CSCTL0_H = CSKEY_H; // unlock the clock interface
CSCTL4_L = XT1DRIVE1; // crystal drive level
while (SFRIFG1_L & OFIFG) // wait for 32KHz oscillator to start
{
CSCTL5_L &= ~XT1OFFG; // clear XT1 fault flag
SFRIFG1_L &= ~OFIFG; // clear oscillator fault flag
}
CSCTL3 = DIVS_3; // set 8 MHz MCLK, SMCLK
}
void Ports_config()
{
P2DIR_bit.P2DIR1 = 0; // assign P2.1 to TimerB input
P2REN_bit.P2REN1 = 1; // enable pull-up resistor on P2.1
P2OUT_bit.P2OUT1 = 1;
P2IES_bit.P2IES1 = 1; // enable button falling edge interrupt
P2IE_bit.P2IE1 = 1; // enable button interrupt
P2IFG_bit.P2IFG1 = 0; // clear interrupt flag
PJSEL0_L = PJSEL0_4 | PJSEL0_5; // config Xtal pins for X1OSC
}
void TimerB_config()
{
TB0CCTL0 = CM_1 | SCS | CAP | CCIE;
}
#pragma vector=PORT2_VECTOR // PORT2 handler
__interrupt void PORT2_ISR(void)
{
if (P2IFG & PAIFG1) // button interrupt?
{
TB0CTL = TASSEL_1 + MC_2 + TBCLR; // start capture
lastCapture = 0;
P2IE_bit.P2IE1 = 0; // disable button interrupt
P2SEL1_bit.P2SEL1_1 = 1; // reassign button for TimerB
P2SEL0_bit.P2SEL0_1 = 1;
P2IFG_bit.P2IFG1 = 0; // clear interrupt flag
}
}
#pragma vector=TIMER0_B0_VECTOR // TimerB handler
__interrupt void TimerB_ISR(void)
{
P2SEL1_bit.P2SEL1_1 = 0; // reassign button to GPIO
P2SEL0_bit.P2SEL0_1 = 0;
P2IE_bit.P2IE1 = 1; // enable button interrupt
P2IFG_bit.P2IFG1 = 0; // clear button interrupt flag
TB0CTL = 0; // stop capture
duration = TB0CCR0 - lastCapture;
lastCapture = TB0CCR0;
TB0CCTL0_bit.CCIFG = 0; // clear TimerB capture flag
__low_power_mode_off_on_exit(); // wake up CPU on exit
} Код: Выделить всё
#include "io430.h"
#define PULSE_CNT 5 // # of pulses in a burst
#define PAUSE_CNT 10 // pause duration
void Clock_config(); // function prototypes
void Ports_config();
void TimerA_config();
void TimerB_config();
unsigned int lastCapture;
unsigned int duration; // button press duration
char timerMode; // 0: burst, 1:pause
char pulseCnt, pauseCnt;
int main()
{
WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer
REFCTL0_L |= REFTCOFF; // disable temp sensor
Ports_config(); // set up ports for GPIO
Clock_config(); // set 8 MHz MSCK, 1 MHz SMCLK
TimerA_config(); // configure TimerA module for PWM
TimerB_config(); // configure TimerB module capture
while(1)
{
__low_power_mode_0(); // wait for capture
__no_operation();
__no_operation(); // set breakpoint here to examine duration
}
}
void Clock_config() // configure clock system
{
CSCTL0_H = CSKEY_H; // unlock the clock interface
CSCTL4_L = XT1DRIVE1; // crystal drive level
while (SFRIFG1_L & OFIFG) // wait for 32KHz oscillator to start
{
CSCTL5_L &= ~XT1OFFG; // clear XT1 fault flag
SFRIFG1_L &= ~OFIFG; // clear oscillator fault flag
}
CSCTL3 = DIVS_3; // set 8 MHz MCLK/1MHz SMCLK
}
void Ports_config()
{
P1SEL1_bit.P1SEL1_0 = 0; // assign P1.0 to TimerA0.1
P1SEL0_bit.P1SEL0_0 = 1;
P1DIR_bit.P1DIR0 = 1;
P2SEL1_bit.P2SEL1_1 = 1; // assign button for TimerB input
P2SEL0_bit.P2SEL0_1 = 1;
// P2DIR_bit.P2DIR1 = 0; // assign P2.1 to GPIO
// P2REN_bit.P2REN1 = 1; // enable pull-up resistor on P2.1
// P2OUT_bit.P2OUT1 = 1;
// P2IES_bit.P2IES1 = 1; // enable button falling edge interrupt
// P2IE_bit.P2IE1 = 1; // enable button interrupt
// P2IFG_bit.P2IFG1 = 0; // clear interrupt flag
PJSEL0_L = PJSEL0_4 | PJSEL0_5; // config Xtal pins for X1OSC
}
void TimerA_config()
{
TA0CCR0 = 18; // timer period
TA0CCR1 = 10; // PWM duty
TA0CCTL1 = OUTMOD_7; // toggle output
TA0CTL = TASSEL_2 + MC_1 + TACLR + TAIE; // start timer
timerMode = 0;
pauseCnt = PAUSE_CNT;
pulseCnt = PULSE_CNT;
}
void TimerB_config()
{
TB0CCTL0 = CM_1 | SCS | CAP | CCIE;
TB0CTL = TASSEL_1 + MC_2 + TBCLR; // start capture
lastCapture = 0;
}
#pragma vector=PORT2_VECTOR // PORT2 handler
__interrupt void PORT2_ISR(void)
{
if (P2IFG & PAIFG1) // button interrupt?
{
TB0CTL = TASSEL_1 + MC_2 + TBCLR; // start capture
lastCapture = 0;
P2IE_bit.P2IE1 = 0; // disable button interrupt
P2SEL1_bit.P2SEL1_1 = 1; // reassign button for TimerB
P2SEL0_bit.P2SEL0_1 = 1;
P2IFG_bit.P2IFG1 = 0; // clear interrupt flag
}
}
#pragma vector=TIMER0_A1_VECTOR // TimerA handler
__interrupt void TimerA_ISR(void)
{
TA0CTL_bit.TAIFG = 0; // clear TimerA interrupt
if (timerMode)
{
if (!(--pauseCnt)) // pause is over is complete
{
pauseCnt = PAUSE_CNT; // restore pause counter
timerMode = 0; // switch to the other mode
TA0CCTL1 = OUTMOD_7; // toggle mode
}
}
else
{
if (!(--pulseCnt)) // burst is complete
{
pulseCnt = PULSE_CNT; // restore pulse counter
timerMode = 1; // switch to the other mode
TA0CCTL1 = OUTMOD_5; // reset mode
}
}
}
#pragma vector=TIMER0_B0_VECTOR // TimerB handler
__interrupt void TimerB_ISR(void)
{
// P2SEL1_bit.P2SEL1_1 = 0; // reassign button to GPIO
// P2SEL0_bit.P2SEL0_1 = 0;
// P2IE_bit.P2IE1 = 1; // enable button interrupt
// P2IFG_bit.P2IFG1 = 0; // clear button interrupt flag
// TB0CTL = 0; // stop capture
duration = TB0CCR0 - lastCapture;
lastCapture = TB0CCR0;
TB0CCTL0_bit.CCIFG = 0; // clear TimerB capture flag
__low_power_mode_off_on_exit(); // wake up CPU on exit
}