关于stm32f0x0的捕获
我在调试stm32f030的捕获功能时，程序按照标准库写的，但不知为什么就是捕获50Hz的正弦信号时是不对的，捕获50Hz的方波是正确，求高手帮忙指导，谢谢，配置程序如下：void Capture_Configuration(void)
{
TIM_ICInitTypeDefTIM_ICInitStructure;
GPIO_InitTypeDefGPIO_InitStructure;
NVIC_InitTypeDefNVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* GPIOA clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* TIM3 channel 1 pin (PA6) configuration */
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Connect TIM pins to AF2 */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_1);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
/* TIM1 configuration: Input Capture mode */
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0x0;
TIM_ICInit(TIM3, &TIM_ICInitStructure);
/* TIM enable counter */
TIM_Cmd(TIM3, ENABLE);
/* Enable the CC1 Interrupt Request */
TIM_ITConfig(TIM3, TIM_IT_CC1 | TIM_IT_Update, ENABLE);
/* Enable the TIM3 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3, TIM_IT_Update) == SET)
{
/* Clear TIM3 Capture compare interrupt pending bit */
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
luwCountOV++;
StateFlg.bit.mubGridZeroFlg = 1;
}
if(TIM_GetITStatus(TIM3, TIM_IT_CC1) == SET)
{
/* Clear TIM3_CH1 Capture compare interrupt pending bit */
TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);
luwCaptureCnt1 = TIM_GetCapture1(TIM3);
}
}
直接捕获正弦信号，一般都是硬件转换成方波捕获。 yvonn 发表于 2015-7-31 21:35
直接捕获正弦信号，一般都是硬件转换成方波捕获。
最用的电路板是有把正弦波转成方波的硬件电路的，但是我现在先调试就直接将正弦波加到pin脚上了，结果是不对的，但是加方波就是对的，以前我也是用正弦波直接调试stm32f302的，也是可以的，但不知为什么030的就不行，我就想是不是我的代码那里有问题。 yvonn 发表于 2015-7-31 21:35
直接捕获正弦信号，一般都是硬件转换成方波捕获。
最终用的电路板是有把正弦波转成方波的硬件电路的。 没用过奥
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