1 | void
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2 | TIMER3_Init(void) {
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3 |
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4 | TIM_ICInitTypeDef TIM_ICInitStructure;
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5 | GPIO_InitTypeDef GPIO_InitStructure;
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6 | NVIC_InitTypeDef NVIC_InitStructure;
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7 |
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8 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
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9 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
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10 |
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11 | // Enable the TIM3 global Interrupt
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12 | NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
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13 | NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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14 | NVIC_InitStructure.NVIC_IRQChannelSubPriority = 6;
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15 | NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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16 | NVIC_Init(&NVIC_InitStructure);
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17 |
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18 | // TIM3 channel 4 pin (PC.09) configuration
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19 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
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20 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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21 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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22 | GPIO_Init(GPIOC, &GPIO_InitStructure);
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23 | GPIO_PinRemapConfig( GPIO_FullRemap_TIM3, ENABLE);
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24 |
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25 | TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;
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26 | TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge;
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27 | TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
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28 | TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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29 | TIM_ICInitStructure.TIM_ICFilter = 0x00;
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30 | TIM_ICInit(TIM3, &TIM_ICInitStructure);
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31 | TIM_ITConfig(TIM3, TIM_IT_CC4, ENABLE);
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32 | TIM_Cmd(TIM3, ENABLE);
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33 |
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34 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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35 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
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36 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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37 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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38 |
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39 | GPIO_Init(GPIOB, &GPIO_InitStructure);
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40 |
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41 | // NVIC_EnableIRQ(TIM3_IRQn);
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42 | }
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