Exemple #1
0
/**
  * @brief  Initialize GPIO registers according to the specified parameters in GPIO_InitStruct.
  * @param  GPIOx GPIO Port
  * @param  GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
  *         that contains the configuration information for the specified GPIO peripheral.
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: GPIO registers are initialized according to GPIO_InitStruct content
  *          - ERROR:   Not applicable
  */
ErrorStatus LL_GPIO_Init(GPIO_TypeDef *GPIOx, LL_GPIO_InitTypeDef *GPIO_InitStruct)
{
  uint32_t pinmask;
  uint32_t pinpos;
  uint32_t currentpin;

  /* Check the parameters */
  assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
  assert_param(IS_LL_GPIO_PIN(GPIO_InitStruct->Pin));

  /* ------------------------- Configure the port pins ---------------- */
  /* Initialize  pinpos on first pin set */

  pinmask = ((GPIO_InitStruct->Pin) << GPIO_PIN_MASK_POS) >> GPIO_PIN_NB;
  pinpos = POSITION_VAL(pinmask);

  /* Configure the port pins */
  while ((pinmask  >> pinpos) != 0U)
  {
    /* skip if bit is not set */
    if ((pinmask & (1U << pinpos)) != 0U)
    {
      /* Get current io position */
      if (pinpos < GPIO_PIN_MASK_POS)
      {
        currentpin = (0x00000101U << pinpos);
      }
      else
      {
        currentpin = ((0x00010001U << (pinpos - GPIO_PIN_MASK_POS)) | 0x04000000U);
      }

      /* Check Pin Mode and Pin Pull parameters */
      assert_param(IS_LL_GPIO_MODE(GPIO_InitStruct->Mode));
      assert_param(IS_LL_GPIO_PULL(GPIO_InitStruct->Pull));

      /* Pin Mode configuration */
      LL_GPIO_SetPinMode(GPIOx, currentpin, GPIO_InitStruct->Mode);

      /* Pull-up Pull-down resistor configuration*/
      LL_GPIO_SetPinPull(GPIOx, currentpin, GPIO_InitStruct->Pull);

      if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
      {
        /* Check speed and Output mode parameters */
        assert_param(IS_LL_GPIO_SPEED(GPIO_InitStruct->Speed));
        assert_param(IS_LL_GPIO_OUTPUT_TYPE(GPIO_InitStruct->OutputType));

        /* Speed mode configuration */
        LL_GPIO_SetPinSpeed(GPIOx, currentpin, GPIO_InitStruct->Speed);

        /* Output mode configuration*/
        LL_GPIO_SetPinOutputType(GPIOx, currentpin, GPIO_InitStruct->OutputType);
      }
    }
    pinpos++;
  }
  return (SUCCESS);
}
/**
  * @brief  Initialize GPIO registers according to the specified parameters in GPIO_InitStruct.
  * @param  GPIOx GPIO Port
  * @param  GPIO_InitStruct: pointer to a @ref LL_GPIO_InitTypeDef structure
  *         that contains the configuration information for the specified GPIO peripheral.
  * @retval An ErrorStatus enumeration value:
  *          - SUCCESS: GPIO registers are initialized according to GPIO_InitStruct content
  *          - ERROR:   Not applicable
  */
ErrorStatus LL_GPIO_Init(GPIO_TypeDef *GPIOx, LL_GPIO_InitTypeDef *GPIO_InitStruct)
{
  uint32_t pinpos     = 0x00000000U;
  uint32_t currentpin = 0x00000000U;

  /* Check the parameters */
  assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
  assert_param(IS_LL_GPIO_PIN(GPIO_InitStruct->Pin));
  assert_param(IS_LL_GPIO_MODE(GPIO_InitStruct->Mode));
  assert_param(IS_LL_GPIO_PULL(GPIO_InitStruct->Pull));

  /* ------------------------- Configure the port pins ---------------- */
  /* Initialize  pinpos on first pin set */
  /* pinpos = 0; useless as already done in default initialization */

  /* Configure the port pins */
  while (((GPIO_InitStruct->Pin) >> pinpos) != 0x00000000U)
  {
    /* Get current io position */
    currentpin = (GPIO_InitStruct->Pin) & (0x00000001U << pinpos);

    if (currentpin)
    {
      /* Pin Mode configuration */
      LL_GPIO_SetPinMode(GPIOx, currentpin, GPIO_InitStruct->Mode);

      if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
      {
        /* Check Speed mode parameters */
        assert_param(IS_LL_GPIO_SPEED(GPIO_InitStruct->Speed));

        /* Speed mode configuration */
        LL_GPIO_SetPinSpeed(GPIOx, currentpin, GPIO_InitStruct->Speed);
      }

      /* Pull-up Pull down resistor configuration*/
      LL_GPIO_SetPinPull(GPIOx, currentpin, GPIO_InitStruct->Pull);

      if (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE)
      {
        /* Check Alternate parameter */
        assert_param(IS_LL_GPIO_ALTERNATE(GPIO_InitStruct->Alternate));

        /* Speed mode configuration */
        if (currentpin < LL_GPIO_PIN_8)
        {
          LL_GPIO_SetAFPin_0_7(GPIOx, currentpin, GPIO_InitStruct->Alternate);
        }
        else
        {
          LL_GPIO_SetAFPin_8_15(GPIOx, currentpin, GPIO_InitStruct->Alternate);
        }
      }
    }
    pinpos++;
  }

  if ((GPIO_InitStruct->Mode == LL_GPIO_MODE_OUTPUT) || (GPIO_InitStruct->Mode == LL_GPIO_MODE_ALTERNATE))
  {
    /* Check Output mode parameters */
    assert_param(IS_LL_GPIO_OUTPUT_TYPE(GPIO_InitStruct->OutputType));

    /* Output mode configuration*/
    LL_GPIO_SetPinOutputType(GPIOx, GPIO_InitStruct->Pin, GPIO_InitStruct->OutputType);

  }
  return (SUCCESS);
}