CC1310 硬件定时（高速）不准，求解决方案

用硬件定时，程序如下：

#include <stdlib.h>
#include <xdc/std.h>
#include <xdc/runtime/System.h>

#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Mailbox.h>
#include <ti/sysbios/knl/Event.h>

/* Drivers */
#include <ti/drivers/rf/RF.h>
#include <ti/drivers/PIN.h>
#include <driverlib/timer.h>
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC26XX.h>

/* Board Header files */
#include "Board.h"

PIN_Handle ledPinHandle;
PIN_State ledPinState;

#define TASK_STACK_SIZE 1024
#define TASK_PRIORITY   2

Hwi_Struct timerHwi;

void waitingTaskFunction(UArg arg0, UArg arg1);

static Task_Params waitingTaskParams;
Task_Struct waitingTask;
static uint8_t waitingTaskStack[TASK_STACK_SIZE];

void interruptTimerA(UArg arg0)
{
  uint32_t status = TimerIntStatus(GPT0_BASE, true);
  PIN_setOutputValue(ledPinHandle, Board_LED1,1);

  if (TIMER_TIMA_TIMEOUT & status) {
    TimerIntClear(GPT0_BASE, TIMER_TIMA_TIMEOUT);
  }

  PIN_setOutputValue(ledPinHandle, Board_LED1,0);
}

void timerInit(void)
{
  /* Switches the peripheral power domain on */
  Power_setDependency(PowerCC26XX_PERIPH_GPT0);

  /* Prevents the controller from going to standby */
  Power_setConstraint(PowerCC26XX_SB_DISALLOW);

  // register ISR and enable hardware interrupt for timer
  Hwi_Params params;
  Hwi_Params_init(&params);
  params.enableInt = TRUE;
  Hwi_construct(&timerHwi, INT_GPT0A, &interruptTimerA, &params, NULL);

  /* Configure the timer hardware */
  TimerDisable(GPT0_BASE, TIMER_A);
  TimerConfigure(GPT0_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PERIODIC | TIMER_CFG_B_PERIODIC);
  TimerPrescaleSet(GPT0_BASE, TIMER_A, 9); // prescaler is 256 - 187.5 kHz

  TimerLoadSet(GPT0_BASE, TIMER_A, 100); // a random number

  TimerIntClear(GPT0_BASE, TIMER_TIMA_TIMEOUT);
  TimerIntEnable(GPT0_BASE, TIMER_TIMA_TIMEOUT);
  TimerEnable(GPT0_BASE, TIMER_A);
}

void WaitingTask_init(void)
{
  Task_Params_init(&waitingTaskParams);
  waitingTaskParams.stackSize = TASK_STACK_SIZE;
  waitingTaskParams.priority = TASK_PRIORITY;
  waitingTaskParams.stack = &waitingTaskStack;
  Task_construct(&waitingTask, waitingTaskFunction, &waitingTaskParams, NULL);
}

void waitingTaskFunction(UArg arg0, UArg arg1)
{
  timerInit();

  for (;;) {
    Task_sleep(30 *1000 / Clock_tickPeriod);               // 30 ms wait
    PIN_setOutputValue(ledPinHandle, Board_LED2, 1);
    PIN_setOutputValue(ledPinHandle, Board_LED2, 0);
  }
}

int main(void)
{
  Board_initGeneral();

  ledPinHandle = PIN_open(&ledPinState, BoardGpioInitTable);
  if (!ledPinHandle) {
    System_abort("Error initializing board LED pins\n");
  }

  WaitingTask_init();
  BIOS_start();
  return (0);
}

当定时时间设置在1ms以上时，程序运行正常；

当定时时间小于100us后，时间不准，时快时慢，而且不随设置变化，毫无规律；

请各位大侠帮忙！

多谢！

TI工程师，帮忙看看是啥问题啊！

多谢！

TI工程师，各位大侠：

请帮忙提供一个定时时间小于20us的例程。不胜感谢！