TI中文支持网Part Number:MSP432E401Y
MSP432P401定时器TA选择外部时钟源TACLK，无法计数。已经根据数据手册配置了GPIO7.2作为TA1CLK，可是当我让一个VP=3.3V，VN=0V，占空比50%的PWM输入到该引脚后，发现，定时器不计数。请问哪个环节出现了错误？
下面是我的配置代码
const Timer_A_ContinuousModeConfig continuousModeConfig =
{TIMER_A_CLOCKSOURCE_EXTERNAL_TXCLK,// ACLK Clock SourceTIMER_A_CLOCKSOURCE_DIVIDER_1,// ACLK/1 = 32.768khzTIMER_A_TAIE_INTERRUPT_ENABLE,// Enable Overflow ISRTIMER_A_DO_CLEAR// Clear Counter
};
int main(void)
{/* Stop watchdog timer */MAP_WDT_A_holdTimer();/* Configuring P1.0 as output */MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);/* Starting and enabling ACLK (32kHz) */MAP_CS_setReferenceOscillatorFrequency(CS_REFO_128KHZ);MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_4);/* Configuring Continuous Mode */MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P7,GPIO_PIN2, GPIO_PRIMARY_MODULE_FUNCTION);//设置GPIO复用MAP_Timer_A_configureContinuousMode(TIMER_A1_BASE, &continuousModeConfig);/* Enabling interrupts and going to sleep */MAP_Interrupt_enableSleepOnIsrExit();MAP_Interrupt_enableInterrupt(INT_TA1_N);/* Enabling MASTER interrupts */MAP_Interrupt_enableMaster();/* Starting the Timer_A0 in continuous mode */MAP_Timer_A_startCounter(TIMER_A1_BASE, TIMER_A_CONTINUOUS_MODE);while(1){MAP_PCM_gotoLPM0();}
}
//******************************************************************************
//
//This is the TIMERA interrupt vector service routine.
//
//******************************************************************************
void TA1_N_IRQHandler(void)
{MAP_Timer_A_clearInterruptFlag(TIMER_A1_BASE);MAP_GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN0);
}
Yale Li：
您好，定时器不计数的具体现象是什么？比如相关的寄存器（TAxR）是什么状态？还有您PWM频率是多少？
,
tang cheng qian tang：
发现问题了，我信号发生器坏了
,
Yale Li：
好的
