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;
}
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