这是初始化的代码，有啥缺漏啊？

void Tim1Init()

{

//Reset TIM1 clock

RCC->APB2RSTR.TIM1RST  = 1;

//Enable TIM1 clock

RCC->APB2ENR.TIM1EN    = 1;

// Select the Counter Mode :Center-aligned mode (up/down counting)

TIM1->CR1.CMS          = 3;

// Set the clock division :No division

TIM1->CR1.CKD          = 3;

//Set the auto-reload preload :TIMx_ARR register is buffered

TIM1->CR1.ARPE         = 1;

//Set the Autoreload value :10000(Arr)

TIM1->CNT.CNT          = 0;

TIM1->ARR.ARR          = 10000;

// Set the Prescaler value :7199 (CK_CNT = CK_PSC /( PSC[15:0]+1))

TIM1->PSC.PSC          = 7199;

// Set the Repetition Counter value :0,is no repetition

TIM1->RCR.REP          = 0;

//Generate an update event to reload the Prescaler and the repetition counter (only for advanced timer) value immediately :UG

TIM1->EGR.UG           = 1;

//ClockSourceConfig:internal clock-CK_INT

//Reset the SMS, TS, ECE, ETPS and ETRF bits:0

TIM1->SMCR.SMS        = 0;

TIM1->SMCR.TS         = 0;

TIM1->SMCR.ECE        = 0;

TIM1->SMCR.ETPS       = 0;

TIM1->SMCR.ETF        = 0;

// Select the TRGO source and Set master mode :0

TIM1->CR2.MMS         = 0;

TIM1->SMCR.MSM        = 0;

//Enable trigger:Update interrupt enable

TIM1->DIER.TIE         = 1;

TIM1->DIER.UIE         = 1;

//Init TIM1 interrupt

//TIM1_UP_IRQn = 25,     /*!< TIM1 Update Interrupt

//prioritygroup:4  PreemptPriority:1 SubPriority:0

NVIC->IP[25]           = 0x40;

//Enable interrupt IRQn  (uint32_t)(1UL << (((uint32_t)25) & 0x1FUL)) :ISER[0]'s 25 bits = 1;

NVIC->ISER[0]          = 0x02000000;

//Enable Counter

TIM1->CR1.CEN          = 1;

}