CC2650控制PWM时，当关闭定时器时引脚置高

当运行PWMclose时，会出现引脚置高的情况，代码如下：

bool PWMInit(PIN_Id pinId, uint32_t uiFrequency, uint8_t ucDutyCycle)
{
PWMpin=pinId;
Freq=uiFrequency;
duration=ucDutyCycle;

PIN_remove(BeepPinHdl, PWMpin);
PIN_Config BeepPinCfg[] = {PWMpin| PIN_GPIO_OUTPUT_EN | PIN_PULLUP | PIN_GPIO_LOW | PIN_DRVSTR_MAX};
BeepPinHdl = PIN_open(&BeepPinState, BeepPinCfg);
PINCC26XX_setMux(BeepPinHdl, PWMpin, IOC_PORT_MCU_PORT_EVENT0);
//RTOS: Enable peripheral domain and clocks for timer
Power_setDependency(PERIPH_GPT0);
//RTOS: Disallow standby while timer is running
Power_setConstraint(Power_SB_DISALLOW);
TimerConfigure(GPT0_BASE, TIMER_CFG_A_PWM | TIMER_CFG_SPLIT_PAIR);

if(pinId==NULL){
return false;}
else{if(uiFrequency==NULL){
return false;}
else{if(ucDutyCycle==NULL){
return false;}
else{
return true;}
}
}
}

void PWMOpen(void)
{
unsigned long PWM_DIV_FACTOR = 0;
unsigned long TIMER_LOADSET = 0;
unsigned long TIMER_MATCH;

if(duration > 100)
duration = 100;
if (Freq < 732)
Freq = 800;

PWM_DIV_FACTOR = 48000000/Freq;
TIMER_MATCH = (PWM_DIV_FACTOR*(100-duration)/100-1);
TIMER_LOADSET = (PWM_DIV_FACTOR-1);

TimerLoadSet(GPT0_BASE,TIMER_A,TIMER_LOADSET);
TimerMatchSet(GPT0_BASE,TIMER_A,TIMER_MATCH);
TimerEventControl(GPT0_BASE, TIMER_A, TIMER_EVENT_NEG_EDGE);
TimerEnable(GPT0_BASE,TIMER_A);
}

void PWMClose(void)
{




TimerDisable(GPT0_BASE, TIMER_A);
// PIN_setOutputValue(BeepPinHdl,PWMpin,0);
}

经常在执行过PWMClose之后，发现配置的引脚输出为高