关于对F1的按键程序移植到F4的问题

Glut · 发表于 2017-4-9 23:12:13

下面的那些代码是F1的，它是相当于F4里面的哪些内容，好像F4里面并没有这样的内容，是这样的吗？
新手不懂，谢谢高手指点

void GPIO_PinRemapConfig(uint32_t GPIO_Remap, FunctionalState NewState)
{
  uint32_t tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_REMAP(GPIO_Remap));
  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if((GPIO_Remap & 0x80000000) == 0x80000000)
  {
tmpreg = AFIO->MAPR2;
  }
  else
  {
tmpreg = AFIO->MAPR;
  }

  tmpmask = (GPIO_Remap & DBGAFR_POSITION_MASK) >> 0x10;
  tmp = GPIO_Remap & LSB_MASK;

  if ((GPIO_Remap & (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK)) == (DBGAFR_LOCATION_MASK | DBGAFR_NUMBITS_MASK))
  {
tmpreg &= DBGAFR_SWJCFG_MASK;
AFIO->MAPR &= DBGAFR_SWJCFG_MASK;
  }
  else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK)
  {
tmp1 = ((uint32_t)0x03) << tmpmask;
tmpreg &= ~tmp1;
tmpreg |= ~DBGAFR_SWJCFG_MASK;
  }
  else
  {
tmpreg &= ~(tmp << ((GPIO_Remap >> 0x15)*0x10));
tmpreg |= ~DBGAFR_SWJCFG_MASK;
  }

  if (NewState != DISABLE)
  {
tmpreg |= (tmp << ((GPIO_Remap >> 0x15)*0x10));
  }

  if((GPIO_Remap & 0x80000000) == 0x80000000)
  {
AFIO->MAPR2 = tmpreg;
  }
  else
  {
AFIO->MAPR = tmpreg;
  }
}