stm32f10x_gpio.c

STM32下做的usb转RS232程序

  
  if ((GPIOx->ODR & GPIO_Pin) != (u32)Bit_RESET)
  {
    bitstatus = (u8)Bit_SET;
  }
  else
  {
    bitstatus = (u8)Bit_RESET;
  }
  return bitstatus;
}

/*******************************************************************************
* Function Name  : GPIO_ReadOutputData
* Description    : Reads the specified GPIO output data port.
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
* Output         : None
* Return         : GPIO output data port value.
*******************************************************************************/
u16 GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
{
  return ((u16)GPIOx->ODR);
}

/*******************************************************************************
* Function Name  : GPIO_SetBits
* Description    : Sets the selected data port bits.
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
*                  - GPIO_Pin: specifies the port bits to be written.
*                    This parameter can be any combination of GPIO_Pin_x where 
*                    x can be (0..15).
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_SetBits(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
  /* Check the parameters */
  assert_param(IS_GPIO_PIN(GPIO_Pin));
  GPIOx->BSRR = GPIO_Pin;
}

/*******************************************************************************
* Function Name  : GPIO_ResetBits
* Description    : Clears the selected data port bits.
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
*                  - GPIO_Pin: specifies the port bits to be written.
*                    This parameter can be any combination of GPIO_Pin_x where 
*                    x can be (0..15).
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_ResetBits(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
  /* Check the parameters */
  assert_param(IS_GPIO_PIN(GPIO_Pin));
  GPIOx->BRR = GPIO_Pin;
}

/*******************************************************************************
* Function Name  : GPIO_WriteBit
* Description    : Sets or clears the selected data port bit.
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
*                  - GPIO_Pin: specifies the port bit to be written.
*                    This parameter can be one of GPIO_Pin_x where x can be (0..15).
*                  - BitVal: specifies the value to be written to the selected bit.
*                    This parameter can be one of the BitAction enum values:
*                       - Bit_RESET: to clear the port pin
*                       - Bit_SET: to set the port pin
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u16 GPIO_Pin, BitAction BitVal)
{
  /* Check the parameters */
  assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
  assert_param(IS_GPIO_BIT_ACTION(BitVal)); 
  
  if (BitVal != Bit_RESET)
  {
    GPIOx->BSRR = GPIO_Pin;
  }
  else
  {
    GPIOx->BRR = GPIO_Pin;
  }
}

/*******************************************************************************
* Function Name  : GPIO_Write
* Description    : Writes data to the specified GPIO data port.
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
*                  - PortVal: specifies the value to be written to the port output
*                    data register.
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Write(GPIO_TypeDef* GPIOx, u16 PortVal)
{
  GPIOx->ODR = PortVal;
}

/*******************************************************************************
* Function Name  : GPIO_PinLockConfig
* Description    : Locks GPIO Pins configuration registers.
* Input          : - GPIOx: where x can be (A..E) to select the GPIO peripheral.
*                  - GPIO_Pin: specifies the port bit to be written.
*                    This parameter can be any combination of GPIO_Pin_x where 
*                    x can be (0..15).
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, u16 GPIO_Pin)
{
  u32 tmp = 0x00010000;
  
  /* Check the parameters */
  assert_param(IS_GPIO_PIN(GPIO_Pin));
  
  tmp |= GPIO_Pin;
  /* Set LCKK bit */
  GPIOx->LCKR = tmp;
  /* Reset LCKK bit */
  GPIOx->LCKR =  GPIO_Pin;
  /* Set LCKK bit */
  GPIOx->LCKR = tmp;
  /* Read LCKK bit*/
  tmp = GPIOx->LCKR;
  /* Read LCKK bit*/
  tmp = GPIOx->LCKR;
}

/*******************************************************************************
* Function Name  : GPIO_EventOutputConfig
* Description    : Selects the GPIO pin used as Event output.
* Input          : - GPIO_PortSource: selects the GPIO port to be used as source
*                    for Event output.
*                    This parameter can be GPIO_PortSourceGPIOx where x can be
*                    (A..E).
*                  - GPIO_PinSource: specifies the pin for the Event output.
*                    This parameter can be GPIO_PinSourcex where x can be (0..15).
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_EventOutputConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
{
  u32 tmpreg = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_PORT_SOURCE(GPIO_PortSource));
  assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
    
  tmpreg = AFIO->EVCR;
  /* Clear the PORT[6:4] and PIN[3:0] bits */
  tmpreg &= EVCR_PORTPINCONFIG_MASK;
  tmpreg |= (u32)GPIO_PortSource << 0x04;
  tmpreg |= GPIO_PinSource;

  AFIO->EVCR = tmpreg;
}

/*******************************************************************************
* Function Name  : GPIO_EventOutputCmd
* Description    : Enables or disables the Event Output.
* Input          : - NewState: new state of the Event output.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_EventOutputCmd(FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NewState));
  
  *(vu32 *) EVCR_EVOE_BB = (u32)NewState;
}

/*******************************************************************************
* Function Name  : GPIO_PinRemapConfig
* Description    : Changes the mapping of the specified pin.
* Input          : - GPIO_Remap: selects the pin to remap.
*                    This parameter can be one of the following values:
*                       - GPIO_Remap_SPI1
*                       - GPIO_Remap_I2C1
*                       - GPIO_Remap_USART1
*                       - GPIO_Remap_USART2
*                       - GPIO_PartialRemap_USART3
*                       - GPIO_FullRemap_USART3
*                       - GPIO_PartialRemap_TIM1
*                       - GPIO_FullRemap_TIM1
*                       - GPIO_PartialRemap1_TIM2
*                       - GPIO_PartialRemap2_TIM2
*                       - GPIO_FullRemap_TIM2
*                       - GPIO_PartialRemap_TIM3
*                       - GPIO_FullRemap_TIM3
*                       - GPIO_Remap_TIM4
*                       - GPIO_Remap1_CAN
*                       - GPIO_Remap2_CAN
*                       - GPIO_Remap_PD01
*                       - GPIO_Remap_SWJ_NoJTRST
*                       - GPIO_Remap_SWJ_JTAGDisable
*                       - GPIO_Remap_SWJ_Disable
*                  - NewState: new state of the port pin remapping.
*                    This parameter can be: ENABLE or DISABLE.
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_PinRemapConfig(u32 GPIO_Remap, FunctionalState NewState)
{
  u32 tmp = 0x00, tmp1 = 0x00, tmpreg = 0x00, tmpmask = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_REMAP(GPIO_Remap));
  assert_param(IS_FUNCTIONAL_STATE(NewState));  
  
  tmpreg = AFIO->MAPR;

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

  if ((GPIO_Remap & DBGAFR_LOCATION_MASK) == DBGAFR_LOCATION_MASK)
  {
    tmpreg &= DBGAFR_SWJCFG_MASK;
  }
  else if ((GPIO_Remap & DBGAFR_NUMBITS_MASK) == DBGAFR_NUMBITS_MASK)
  {
    tmp1 = ((u32)0x03) << tmpmask;
    tmpreg &= ~tmp1;
  }
  else
  {
    tmpreg &= ~tmp;
  }

  if (NewState != DISABLE)
  {
    if ((GPIO_Remap & DBGAFR_LOCATION_MASK) == DBGAFR_LOCATION_MASK)
    {
      tmpreg |= (tmp << 0x10);
    }
    else
    {
      tmpreg |= tmp;
    }
  }
  AFIO->MAPR = tmpreg;
}

/*******************************************************************************
* Function Name  : GPIO_EXTILineConfig
* Description    : Selects the GPIO pin used as EXTI Line.
* Input          : - GPIO_PortSource: selects the GPIO port to be used as
*                    source for EXTI lines.
*                  - GPIO_PinSource: specifies the EXTI line to be configured.
*                   This parameter can be GPIO_PinSourcex where x can be (0..15).
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_EXTILineConfig(u8 GPIO_PortSource, u8 GPIO_PinSource)
{
  u32 tmp = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_PORT_SOURCE(GPIO_PortSource));
  assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
  
  tmp = ((u32)0x0F) << (0x04 * (GPIO_PinSource & (u8)0x03));

  AFIO->EXTICR[GPIO_PinSource >> 0x02] &= ~tmp;
  AFIO->EXTICR[GPIO_PinSource >> 0x02] |= (((u32)GPIO_PortSource) << (0x04 * (GPIO_PinSource & (u8)0x03)));
}

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/