看例程HelloWorld用LPTMR初始化一定时器：
  // LPTMR configurations
  lptmr_user_config_t lptmrConfig =
  {
    .timerMode = kLptmrTimerModeTimeCounter,
    .freeRunningEnable = false,
    .prescalerEnable = true,
    .prescalerClockSource = kClockLptmrSrcLpoClk,
    .prescalerValue = kLptmrPrescalerDivide2,
    .isInterruptEnabled = true,
  };
  lptmr_state_t lptmrState;    // LPTMR driver state information

  LPTMR_DRV_Init(LPTMR0_IDX, &lptmrState, &lptmrConfig);    // Initialize LPTMR
  LPTMR_DRV_SetTimerPeriodUs(LPTMR0_IDX, TMR_PERIOD);       // Set timer period for TMR_PERIOD seconds
  LPTMR_DRV_InstallCallback(LPTMR0_IDX, lptmr_call_back);   // Install interrupt call back function for LPTMR
  LPTMR_DRV_Start(LPTMR0_IDX);    // Start LPTMR

将这段代码放在main()中可以正确初始化LPTMR，可在中断中闪烁一LED。
但将这段代码放在一函数中，如：
void lptmr_func(void)
{
  // LPTMR configurations
  lptmr_user_config_t lptmrConfig =
  {
    .timerMode = kLptmrTimerModeTimeCounter,
    .freeRunningEnable = false,
    .prescalerEnable = true,
    .prescalerClockSource = kClockLptmrSrcLpoClk,
    .prescalerValue = kLptmrPrescalerDivide2,
    .isInterruptEnabled = true,
  };
  lptmr_state_t lptmrState;    // LPTMR driver state information

  LPTMR_DRV_Init(LPTMR0_IDX, &lptmrState, &lptmrConfig);    // Initialize LPTMR
  LPTMR_DRV_SetTimerPeriodUs(LPTMR0_IDX, TMR_PERIOD);       // Set timer period for TMR_PERIOD seconds
  LPTMR_DRV_InstallCallback(LPTMR0_IDX, lptmr_call_back);   // Install interrupt call back function for LPTMR
  LPTMR_DRV_Start(LPTMR0_IDX);    // Start LPTMR
}
再在main()中调用lptrm_func()，则无法正确初始化LPTMR。

查API Reference，原型为：


不是是否是const指针的问题？