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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************

* File Name          : 75x_gpio.c

* Author             : MCD Application Team

* Date First Issued  : 03/10/2006

* Description        : This file provides all the GPIO software functions.

********************************************************************************

* History:

* 07/17/2006 : V1.0

* 03/10/2006 : V0.1

********************************************************************************

* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.

* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,

* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE

* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING

* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

*******************************************************************************/

/* Includes ------------------------------------------------------------------*/

#include "75x_gpio.h"

#include "75x_mrcc.h"

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

#define GPIO_Remap_Mask    0x1F       /* GPIO remapping mask */

#define GPIO_Pin_Mask      0x000FFFFF /* GPIO1 and GPIO2 all pins mask */

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

/*******************************************************************************

* Function Name  : GPIO_DeInit

* Description    : Deinitializes the GPIOx peripheral registers to their default

*                  reset values.

*                  The I/O remapping register 0 and 1 are not reset by this function.

* Input          : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_DeInit(GPIO_TypeDef* GPIOx)

{

  /* Reset the GPIOx registers values */

  GPIOx->PC0 = 0xFFFFFFFF;

  GPIOx->PC1 = 0x0;

  GPIOx->PC2 = 0x0;

  GPIOx->PM = 0x0;

}

/*******************************************************************************

* Function Name  : GPIO_Init

* Description    : Initializes the GPIOx peripheral according to the specified

*                  parameters in the GPIO_InitStruct. This function will not

*                  change the configuration for a pin if the corresponding mask

*                  bit is set, except pins configured as input pull-up or pull-down.

*                  These pins are automatically masked after each configuration.

* Input          :- GPIOx: where x can be (0..2) to select the GPIO peripheral.

*                 - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that

*                   contains the configuration information for the specified GPIO

*                   peripheral.

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)

{

  /* GPIOx Mode and Pins Set */

  if((GPIOx != GPIO0) && (GPIO_InitStruct->GPIO_Pin == GPIO_Pin_All))

  {

    GPIO_InitStruct->GPIO_Pin = GPIO_Pin_Mask;

  }

  switch(GPIO_InitStruct->GPIO_Mode)

  {

    case GPIO_Mode_AIN:

      GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_IN_FLOATING:

      GPIOx->PC0 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_IPD:

      GPIOx->PM  &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC0 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PD  &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PM  |=  GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_IPU:

      GPIOx->PM  &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC0 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PD  |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PM  |=  GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_Out_OD:

      GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 |=  GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_Out_PP:

      GPIOx->PC0 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 |=  GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_AF_OD:

      GPIOx->PD  |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 |=  GPIO_InitStruct->GPIO_Pin;

      break;

    case GPIO_Mode_AF_PP:

      GPIOx->PC0 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 |=  GPIO_InitStruct->GPIO_Pin;

      break;

    default :

      GPIOx->PC0 |=  GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;

      GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;

      break;

  }

}

/*******************************************************************************

* Function Name  : GPIO_StructInit

* Description    : Fills each GPIO_InitStruct member with its default value.

* Input          : GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure

*                  which will be initialized.

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)

{

  /* Reset GPIO init structure parameters values */

  GPIO_InitStruct->GPIO_Pin  = GPIO_Pin_All;

  GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING;

}

/*******************************************************************************

* Function Name  : GPIO_Read

* Description    : Reads the specified GPIO data port.

* Input          : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.

* Output         : None

* Return         : GPIO data port word value.

*******************************************************************************/

u32 GPIO_Read(GPIO_TypeDef* GPIOx)

{

  return GPIOx->PD;

}

/*******************************************************************************

* Function Name  : GPIO_ReadBit

* Description    : Reads the specified data port bit.

* Input          : - GPIOx: where x can be (0..2) to select the GPIO peripheral.

*                : - GPIO_Pin:  specifies the port bit to read.

*                    This parameter can be GPIO_Pin_x where x can be (0..31) for

*                    GPIO0 and x(0..19) for GPIO1 and GPIO2.

* Output         : None

* Return         : The port pin value

*******************************************************************************/

u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u32 GPIO_Pin)

{

  if ((GPIOx->PD & GPIO_Pin) != Bit_RESET)

  {

    return Bit_SET;

  }

  else

  {

    return Bit_RESET;

  }

}

/*******************************************************************************

* Function Name  : GPIO_Write

* Description    : Writes data to the specified GPIO data port.

* Input          :- GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.

*                 - PortVal: specifies the value to be written to the data port

*                   register.

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_Write(GPIO_TypeDef* GPIOx, u32 PortVal)

{

  GPIOx->PD = PortVal;

}

/*******************************************************************************

* Function Name  : GPIO_WriteBit

* Description    : Sets or clears the selected data port bit.

* Input          : - GPIOx: where x can be (0..2) to select the GPIO peripheral.

*                  - GPIO_Pin: specifies the port bit to be written.

*                    This parameter can be GPIO_Pin_x where x can be (0..31) for

*                    GPIO0 and x(0..19) for GPIO1 and GPIO2.

*                  - BitVal: specifies the value to be written to the selected bit.

*                    This parameter must 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, u32 GPIO_Pin, BitAction BitVal)

{

  if(BitVal != Bit_RESET)

  {

    GPIOx->PD |= GPIO_Pin;

  }

  else

  {

    GPIOx->PD &= ~GPIO_Pin;

  }

}

/*******************************************************************************

* Function Name  : GPIO_PinMaskConfig

* Description    : Enables or disables write protection to the selected bits in

*                  the I/O port registers (PxC2, PxC1, PxC0 and PxD).

* Input          :- GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.

*                 - GPIO_Pin: specifies the port bit to be protected.

*                   This parameter can be GPIO_Pin_x where x can be (0..31) for

*                   GPIO0 and x(0..19) for GPIO1 and GPIO2.

*                 - NewState: new state of the port pin.

*                   This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_PinMaskConfig(GPIO_TypeDef* GPIOx, u32 GPIO_Pin, FunctionalState NewState)

{

  if(NewState == ENABLE)

  {

    GPIOx->PM |= GPIO_Pin;

  }

  else

  {

    GPIOx->PM &= ~GPIO_Pin;

  }

}

/*******************************************************************************

* Function Name  : GPIO_GetPortMask

* Description    : Gets the GPIOx port mask value.

* Input          : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.

* Output         : None

* Return         : GPIO port mask value.

*******************************************************************************/

u32 GPIO_GetPortMask(GPIO_TypeDef* GPIOx)

{

  return GPIOx->PM;

}

/*******************************************************************************

* 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_SMI_CS3_EN: Enable SMI CS3

*                     - GPIO_Remap_SMI_CS2_EN: Enable SMI CS2

*                     - GPIO_Remap_SMI_CS1_EN: Enable SMI CS1

*                     - GPIO_Remap_SMI_EN: Enable SMI Alternate Functions:

*                       SMI_CS0, SMI_CK, SMI_DIN and SMI_DOUT

*                     - GPIO_Remap_DBGOFF: JTAG Disable

*                     - GPIO_Remap_UART1: UART1 Alternate Function mapping

*                     - GPIO_Remap_UART2: UART2 Alternate Function mapping

*                     - GPIO_Remap_SSP1: SSP1 Alternate Function mapping

*                     - GPIO_Remap_TIM2: TIM2 Alternate Function mapping

*                     - GPIO_Remap_TIM0: TIM0 Alternate Function mapping

*                 - NewState: new state of the port pin.

*                   This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_PinRemapConfig(u16 GPIO_Remap, FunctionalState NewState)

{

  u32 GPIOReg = 0;

  u32 PinPos = 0;

  /* Get the GPIO register index */

  GPIOReg = GPIO_Remap >> 5;

  /* Get the pin position */

  PinPos = GPIO_Remap & GPIO_Remap_Mask;

  if(GPIOReg == 1) /* The pin to remap is in REMAP0R register */

  {

    if(NewState == ENABLE)

    {

      GPIOREMAP->REMAP0R |= (1 << PinPos);

    }

    else

    {

      GPIOREMAP->REMAP0R &= ~(1 << PinPos);

    }

  }

  else if(GPIOReg == 2) /* The pin to remap is in REMAP1R register */

  {

    if(NewState == ENABLE)

    {

      GPIOREMAP->REMAP1R |= (1 << PinPos);

    }

    else

    {

      GPIOREMAP->REMAP1R &= ~(1 << PinPos);

    }

  }

}

/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/