void TIM3_Int_Init(u16 arr,u16 psc)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        NVIC_InitTypeDef NVIC_InitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

        TIM_TimeBaseStructure.TIM_Period = arr;
        TIM_TimeBaseStructure.TIM_Prescaler =psc;
        TIM_TimeBaseStructure.TIM_ClockDivision = 0;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
        TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

        TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE );

        NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);

        TIM_Cmd(TIM3, ENABLE);
                                                         
}
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void TIM3_IRQHandler(void)   
{
        if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
                {
                TIM_ClearITPendingBit(TIM3, TIM_IT_Update  );
                samp++;
                        if(samp>=400) samp=0;
                        TIM_SetCompare1(TIM1, Sin_Dat[samp]);
                }
}

void TIM1_Int_Init(u16 arr,u16 psc)
{
        GPIO_InitTypeDef GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        TIM_BDTRInitTypeDef TIM_BDTRInitStruct;
       
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);       
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
       
        GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1, ENABLE);
       
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_7;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOA, &GPIO_InitStructure);
       
        TIM_TimeBaseStructure.TIM_Period = arr;
        TIM_TimeBaseStructure.TIM_Prescaler =psc;
        TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;
       
        /*********************************************************/
        TIM_TimeBaseStructure.TIM_RepetitionCounter=0;       
        /****************************************************************/
        TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
       
        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
        TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_Low;
        TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable;
        //*********************************************//
        TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Reset;
        TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCNIdleState_Reset;
        ////////////////////////////////////////////////////////////
        TIM_OC1Init(TIM1, &TIM_OCInitStructure);

        TIM_BDTRInitStruct.TIM_OSSRState=TIM_OSSRState_Enable;
        TIM_BDTRInitStruct.TIM_OSSIState=TIM_OSSRState_Enable;
        TIM_BDTRInitStruct.TIM_LOCKLevel=TIM_LOCKLevel_1;
        TIM_BDTRInitStruct.TIM_DeadTime=0xfe;
        TIM_BDTRInitStruct.TIM_BreakPolarity=TIM_BreakPolarity_Low;
        TIM_BDTRInitStruct.TIM_Break=TIM_Break_Disable;
        TIM_BDTRInitStruct.TIM_AutomaticOutput=TIM_AutomaticOutput_Enable;
        TIM_BDTRConfig(TIM1,&TIM_BDTRInitStruct);
       
       
        TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
        TIM_ARRPreloadConfig(TIM1, ENABLE);
       
        /**************************************************/
        TIM_CtrlPWMOutputs(TIM1, ENABLE);
        /***************************************************/
       
        TIM_Cmd(TIM1, ENABLE);
}