stm32f0xx_gpio.c

stm32f0固件库

  tmp = GPIOx->LCKR;
  /* Read LCKK bit */
  tmp = GPIOx->LCKR;
}

/**
  * @}
  */

/** @defgroup GPIO_Group2 GPIO Read and Write
 *  @brief   GPIO Read and Write
 *
@verbatim   
 ===============================================================================
                      ##### GPIO Read and Write #####
 ===============================================================================  

@endverbatim
  * @{
  */

/**
  * @brief  Reads the specified input port pin.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @param  GPIO_Pin: specifies the port bit to read.
  * @note   This parameter can be GPIO_Pin_x where x can be:(0..15) for GPIOA, 
  *         GPIOB or GPIOC,(0..2) for GPIOD and(0..3) for GPIOF.
  * @retval The input port pin value.
  */
uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
  uint8_t bitstatus = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
  assert_param(IS_GET_GPIO_PIN(GPIO_Pin));

  if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET)
  {
    bitstatus = (uint8_t)Bit_SET;
  }
  else
  {
    bitstatus = (uint8_t)Bit_RESET;
  }
  return bitstatus;
}

/**
  * @brief  Reads the specified input port pin.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @retval The input port pin value.
  */
uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx)
{
  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

  return ((uint16_t)GPIOx->IDR);
}

/**
  * @brief  Reads the specified output data port bit.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @param  GPIO_Pin: Specifies the port bit to read.
  * @note   This parameter can be GPIO_Pin_x where x can be:(0..15) for GPIOA, 
  *         GPIOB or GPIOC,(0..2) for GPIOD and(0..3) for GPIOF.
  * @retval The output port pin value.
  */
uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
  uint8_t bitstatus = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
  assert_param(IS_GET_GPIO_PIN(GPIO_Pin));

  if ((GPIOx->ODR & GPIO_Pin) != (uint32_t)Bit_RESET)
  {
    bitstatus = (uint8_t)Bit_SET;
  }
  else
  {
    bitstatus = (uint8_t)Bit_RESET;
  }
  return bitstatus;
}

/**
  * @brief  Reads the specified GPIO output data port.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @retval GPIO output data port value.
  */
uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx)
{
  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

  return ((uint16_t)GPIOx->ODR);
}

/**
  * @brief  Sets the selected data port bits.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @param  GPIO_Pin: specifies the port bits to be written.
  * @note   This parameter can be GPIO_Pin_x where x can be:(0..15) for GPIOA, 
  *         GPIOB or GPIOC,(0..2) for GPIOD and(0..3) for GPIOF.
  * @retval None
  */
void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
  assert_param(IS_GPIO_PIN(GPIO_Pin));

  GPIOx->BSRR = GPIO_Pin;
}

/**
  * @brief  Clears the selected data port bits.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @param  GPIO_Pin: specifies the port bits to be written.
  * @note   This parameter can be GPIO_Pin_x where x can be: (0..15) for GPIOA, 
  *         GPIOB or GPIOC,(0..2) for GPIOD and(0..3) for GPIOF.
  * @retval None
  */
void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
{
  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
  assert_param(IS_GPIO_PIN(GPIO_Pin));

  GPIOx->BRR = GPIO_Pin;
}

/**
  * @brief  Sets or clears the selected data port bit.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @param  GPIO_Pin: specifies the port bit to be written.
  * @param  BitVal: specifies the value to be written to the selected bit.
  *   This parameter can be one of the BitAction enumeration values:
  *     @arg Bit_RESET: to clear the port pin
  *     @arg Bit_SET: to set the port pin
  * @note   The GPIO_Pin parameter can be GPIO_Pin_x where x can be: (0..15) for GPIOA, 
  *         GPIOB or GPIOC,(0..2) for GPIOD and(0..3) for GPIOF.  
  * @retval None
  */
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal)
{
  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
  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 ;
  }
}

/**
  * @brief  Writes data to the specified GPIO data port.
  * @param  GPIOx: where x can be (A, B, C, D or F) to select the GPIO peripheral.
  * @param  PortVal: specifies the value to be written to the port output data 
  *                  register.
  * @retval None
  */
void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal)
{
  /* Check the parameters */
  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

  GPIOx->ODR = PortVal;
}

/**
  * @}
  */

/** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions
 *  @brief   GPIO Alternate functions configuration functions
 *
@verbatim   
 ===============================================================================
          ##### GPIO Alternate functions configuration functions #####
 ===============================================================================  

@endverbatim
  * @{
  */

/**
  * @brief  Writes data to the specified GPIO data port.
  * @param  GPIOx: where x can be (A or B) to select the GPIO peripheral.
  * @param  GPIO_PinSource: specifies the pin for the Alternate function.
  *   This parameter can be GPIO_PinSourcex where x can be (0..15).
  * @param  GPIO_AF: selects the pin to used as Alternate function.
  *   This parameter can be one of the following value:
 *     @arg GPIO_AF_0:WKUP, EVENTOUT, TIM15, SPI1, TIM17,MCO, SWDAT, SWCLK, TIM14,
 *                    BOOT,USART1, CEC, IR_OUT, SPI2 
 *     @arg GPIO_AF_1:USART2, CEC, Tim3, USART1, USART2,EVENTOUT, I2C1, I2C2, TIM15 
 *     @arg GPIO_AF_2:TIM2, TIM1, EVENTOUT, TIM16, TIM17.
 *     @arg GPIO_AF_3:TS, I2C1, TIM15, EVENTOUT 
 *     @arg GPIO_AF_4:TIM14.
 *     @arg GPIO_AF_5:TIM16, TIM17.
 *     @arg GPIO_AF_6:EVENTOUT.
 *     @arg GPIO_AF_7:COMP1 OUT, COMP2 OUT 
 * @note  The pin should already been configured in Alternate Function mode(AF)
 *        using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
 * @note  Refer to the Alternate function mapping table in the device datasheet 
 *        for the detailed mapping of the system and peripherals'alternate 
 *        function I/O pins.
 * @retval None
 */
void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF)
{
  uint32_t temp = 0x00;
  uint32_t temp_2 = 0x00;

  /* Check the parameters */
  assert_param(IS_GPIO_LIST_PERIPH(GPIOx));
  assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
  assert_param(IS_GPIO_AF(GPIO_AF));

  temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
  GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4));
  temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp;
  GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

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