M451的GPIO可以设置成脉冲上升沿或下降沿中断吗？

M451的GPIO可以设置成脉冲上升沿或下降沿中断吗？如果识别是哪个中断源呢？有例程吗？

2019-1-8 09:10:35

脉冲还有上升沿和下降沿之分吗、？

2019-1-8 09:10:45

你那不是脉冲了，是高低电平。你设置成双边沿中断就行了。

2019-1-8 09:11:00

/**
* [url=home.php?mod=space&uid=247401]@brief[/url] Enable GPIO interrupt
*
* @param[in] port GPIO port. It could be PA, PB, PC, PD, PE or PF.
* @param[in] u32Pin The pin of specified GPIO port.
* It could be 0 ~ 15 for PA, PB, PC and PD GPIO port.
* It could be 0 ~ 14 for PE GPIO port.
* It could be 0 ~ 7 for PF GPIO port.
* @param[in] u32IntAttribs The interrupt attribute of specified GPIO pin. It could be n
* GPIO_INT_RISING, GPIO_INT_FALLING, GPIO_INT_BOTH_EDGE, GPIO_INT_HIGH, GPIO_INT_LOW.
*
* [url=home.php?mod=space&uid=266161]@return[/url] None
*
* [url=home.php?mod=space&uid=1543424]@Details[/url] This function is used to enable specified GPIO pin interrupt.
*/
void GPIO_EnableInt(GPIO_T *port, uint32_t u32Pin, uint32_t u32IntAttribs)
{
port->INTTYPE |= (((u32IntAttribs >> 24) & 0xFFUL) << u32Pin);
port->INTEN |= ((u32IntAttribs & 0xFFFFFFUL) << u32Pin);
}