| | |
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| | | |
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| | | NVIC_Init(&NVIC_InitStructure); |
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| | | } |
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| | | |
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| | | //?????3????? |
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| | | //???????APB1?2?,?APB1?36M |
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| | | //arr:?????? |
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| | | //psc:?????? |
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| | | //?????????3! |
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| | | void TIM3_Int_Init(void) |
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| | | { |
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| | | TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; |
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| | | NVIC_InitTypeDef NVIC_InitStructure; |
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| | | |
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| | | RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //???? |
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| | | |
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| | | //???TIM3??? |
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| | | TIM_TimeBaseStructure.TIM_Period = 1000-1; //??????????????????????????? |
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| | | TIM_TimeBaseStructure.TIM_Prescaler =72-1; //??????TIMx??????????? |
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| | | TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //??????:TDTS = Tck_tim |
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| | | TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?????? |
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| | | TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //??????????TIMx??????? |
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| | | |
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| | | TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //?????TIM3??,?????? |
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| | | |
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| | | //?????NVIC?? |
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| | | NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3?? |
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| | | NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //?????0? |
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| | | NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //????3? |
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| | | NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ????? |
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| | | NVIC_Init(&NVIC_InitStructure); //???NVIC??? |
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| | | |
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| | | |
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| | | TIM_Cmd(TIM3, ENABLE); //??TIMx |
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| | | } |
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| | | //???3?????? |
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| | | int Systick_Init(void) |
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| | | { |
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| | | int time_retry = 500; |
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