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发表于 2013-10-26 08:37:12
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void TIME_Configuration(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseStructure.TIM_Period =0xffff; //
TIM_TimeBaseStructure.TIM_Prescaler =0; //设置预分频:
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ; //设置时钟分频系数:不分频
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
//编码接口配置
TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI1,
TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
TIM_ICStructInit(&TIM_ICInitStructure);
TIM_ICInitStructure.TIM_ICFilter = 6; //6 //比较滤波器
TIM_ICInit(TIM3, &TIM_ICInitStructure);
// Clear all pending interrupts
TIM_ClearFlag(TIM3, TIM_FLAG_Update);
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
//Reset counter
TIM3->CNT =0;
TIM_Cmd(TIM3, ENABLE);
}
void GPIO_Configuration(void)
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|
RCC_AHB1Periph_GPIOC|
RCC_AHB1Periph_GPIOE|
RCC_AHB1Periph_GPIOD, ENABLE);
// TIM3-->CH1|CH2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_TIM3);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_TIM3);
} |
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