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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************

* File Name          : 91x_gpio.c

* Author             : MCD Application Team

* Version            : V2.1

* Date               : 12/22/2008

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

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

* 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 "91x_gpio.h"

#include "91x_scu.h"

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

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

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

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

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

   static u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx);

   static u16 GPIO_GetAnaloClearBits(u8 GPIO_ANAChannel);

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

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

* Function Name  : GPIO_DeInit

* Description    : Deinitializes the GPIOx peripheral registers to their default

*                  reset values.

* Input          : GPIOx: where x can be (0..9) to select the GPIO peripheral.

* Output         : None

* Return         : None

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

void GPIO_DeInit(GPIO_TypeDef* GPIOx)

{

  /* Reset the GPIO registers values */

  if(GPIOx == GPIO0)

  {

    SCU_APBPeriphReset(__GPIO0,ENABLE);

    SCU_APBPeriphReset(__GPIO0,DISABLE);

    SCU->GPIOTYPE[0x00] = 0x0000 ;

    SCU->GPIOOUT[0x00]  = 0x0000;

    SCU->GPIOIN[0x00]   = 0x0000;

  }

   if(GPIOx == GPIO1)

  {

    SCU_APBPeriphReset(__GPIO1,ENABLE);

    SCU_APBPeriphReset(__GPIO1,DISABLE);

    SCU->GPIOTYPE[0x01] = 0x0000 ;

    SCU->GPIOOUT[0x01]  = 0x0000;

    SCU->GPIOIN[0x01]   = 0x0000;

  }

   if(GPIOx == GPIO2)

  {

    SCU_APBPeriphReset(__GPIO2,ENABLE);

    SCU_APBPeriphReset(__GPIO2,DISABLE);

    SCU->GPIOTYPE[0x02] = 0x0000 ;

    SCU->GPIOOUT[0x02]  = 0x0000;

    SCU->GPIOIN[0x02]   = 0x0000;

  }

   if(GPIOx == GPIO3)

  {

    SCU_APBPeriphReset(__GPIO3,ENABLE);

    SCU_APBPeriphReset(__GPIO3,DISABLE);

    SCU->GPIOTYPE[0x03] = 0x0000 ;

    SCU->GPIOOUT[0x03]  = 0x0000;

    SCU->GPIOIN[0x03]   = 0x0000;

  }

   if(GPIOx == GPIO4)

  {

    SCU_APBPeriphReset(__GPIO4,ENABLE);

    SCU_APBPeriphReset(__GPIO4,DISABLE);

    SCU->GPIOTYPE[0x04] = 0x0000 ;

    SCU->GPIOOUT[0x04]  = 0x0000;

    SCU->GPIOIN[0x04]   = 0x0000;

    SCU->GPIOANA = 0x00;

  }

   if(GPIOx == GPIO5)

  {

    SCU_APBPeriphReset(__GPIO5,ENABLE);

    SCU_APBPeriphReset(__GPIO5,DISABLE);

    SCU->GPIOTYPE[0x05] = 0x0000 ;

    SCU->GPIOOUT[0x05]  = 0x0000;

    SCU->GPIOIN[0x05]   = 0x0000;

  }

   if(GPIOx == GPIO6)

  {

    SCU_APBPeriphReset(__GPIO6,ENABLE);

    SCU_APBPeriphReset(__GPIO6,DISABLE);

    SCU->GPIOTYPE[0x06] = 0x0000 ;

    SCU->GPIOOUT[0x06]  = 0x0000;

    SCU->GPIOIN[0x06]   = 0x0000;

  }

   if(GPIOx == GPIO7)

  {

    SCU_APBPeriphReset(__GPIO7,ENABLE);

    SCU_APBPeriphReset(__GPIO7,DISABLE);

    SCU->GPIOTYPE[0x07] = 0x0000;

    SCU->GPIOOUT[0x07]  = 0x0000;

    SCU->GPIOIN[0x07]   = 0x0000;

  }

   if(GPIOx == GPIO8)

  {

    SCU_APBPeriphReset(__GPIO8,ENABLE);

    SCU_APBPeriphReset(__GPIO8,DISABLE);

    SCU->GPIOTYPE[0x08] = 0x0000;

    SCU->GPIOEMI = 0x00;

  }

   if(GPIOx == GPIO9)

  {

    SCU_APBPeriphReset(__GPIO9,ENABLE);

    SCU_APBPeriphReset(__GPIO9,DISABLE);

    SCU->GPIOTYPE[0x09] = 0x0000;

    SCU->GPIOEMI = 0x00;

  }

}

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

* Function Name  : GPIO_Init

* Description    : Initializes the GPIOx peripheral according to the specified

*                  parameters in the GPIO_InitStruct .

* Input          :- GPIOx: where x can be (0..9) 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)

{

  /* Select pin direction */

  u8 PinNumber = 0;

  u8 Counter = 0;

  u8 GPIO_Number = 0;

  GPIO_Number = GPIO_GetGPIONumber(GPIOx);

  if(GPIO_InitStruct->GPIO_Direction == GPIO_PinOutput)

  {

  GPIOx->DDR |= GPIO_InitStruct->GPIO_Pin;

  }

  else

  {

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

  }

   for (Counter = 0; Counter < 8;Counter++)

    {

     /*Search pin number*/

     PinNumber = (GPIO_InitStruct->GPIO_Pin & (1 <<Counter));

     if((PinNumber >> Counter) == 1)

     {

        if (GPIO_Number < 8)

        {

          /*Output ALternate 0*/

          SCU->GPIOOUT[GPIO_Number] &= ~(0x3 <<(Counter *2));

          if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt1)

          {

            /*Output ALternate 1*/

            SCU->GPIOOUT[GPIO_Number] |= 1 << (Counter *2);

          }

          if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt2)

          {

            /*Output ALternate 2*/

            SCU->GPIOOUT[GPIO_Number] |= 0x2 << (Counter *2);

          }

          if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt3)

          {

            /*Output ALternate 3*/

            SCU->GPIOOUT[GPIO_Number] |= 0x3 << (Counter *2);

          }

          /*IP Connected disable*/

          SCU->GPIOIN[GPIO_Number] &= ~(0x1 << Counter) ;

          if(GPIO_InitStruct->GPIO_IPInputConnected == GPIO_IPInputConnected_Enable)

          {

            /*IP Connected enable*/

            SCU->GPIOIN[GPIO_Number] |= 0x1 << Counter;

          }

        }

       /*Type configuration: PushPull or Open Collector*/

        SCU->GPIOTYPE[GPIO_Number] &= ~(0x1 << Counter) ;

       if(GPIO_InitStruct->GPIO_Type == GPIO_Type_OpenCollector)

       {

         /*Open Drain configuration*/

        SCU->GPIOTYPE[GPIO_Number] |= 0x1 << Counter;

       }    

    }

 }

}

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

* Function Name  : GPIO_StructInit

* Description    : Initialize the GPIO Init Structure parameters

* 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_Direction = GPIO_PinInput;

  GPIO_InitStruct->GPIO_IPInputConnected = GPIO_IPInputConnected_Disable;

  GPIO_InitStruct->GPIO_Alternate = GPIO_InputAlt1;

}

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

* Function Name  : GPIO_ReadBit

* Description    : Reads the specified port pin

* Input          : - GPIOx: where x can be (0..9) to select the GPIO peripheral.

*                : - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x

*                    where x can be (0..7).

* Output         : None

* Return         : The port pin value

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

u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u8 GPIO_Pin)

{

  if ((((GPIOx->DR[GPIO_Pin<<2])) & GPIO_Pin) != Bit_RESET )

  {

    return Bit_SET;

  }

  else

  {

    return Bit_RESET;

  }

}

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

* Function Name  : GPIO_Read

* Description    : Reads the specified GPIO data port

* Input          : - GPIOx: where x can be (0..9) to select the GPIO peripheral.

* Output         : None

* Return         : GPIO data port word value.

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

u8 GPIO_Read(GPIO_TypeDef* GPIOx)

{

  return (GPIOx->DR[0x3FC]);

}

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

* Function Name  : GPIO_WriteBit

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

* Input          : - GPIOx: where x can be (0..9) to select the GPIO peripheral.

*                  - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x

*                    where x can be (0..7).

*                  - BitVal: this parameter specifies the value to be written

*                    to the selected bit.

*                    BitVal 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, u8 GPIO_Pin, BitAction BitVal)

{

  if(BitVal == Bit_SET)

  {

    GPIOx->DR[GPIO_Pin <<2] = GPIO_Pin;

  }

  else

  {

    GPIOx->DR[GPIO_Pin <<2] = 0x00;

  }

}

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

* Function Name  : GPIO_Write

* Description    : Writes the passed value in the selected data GPIOx port

*                  register.

* Input          :- GPIOx: where x can be (0..9) to select the GPIO peripheral.

*                 - PortVal: the value to be written to the data port register.

* Output         : None

* Return         : None

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

void GPIO_Write(GPIO_TypeDef* GPIOx, u8 PortVal)

{

  GPIOx->DR[0x3FC] = PortVal;

}

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

* Function Name  : GPIO_EMIConfig

* Description    : Enables or disables GPIO 8 and 9 in EMI mode.

* Input          : - NewState: new state of the EMI.

*                   This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

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

void GPIO_EMIConfig(FunctionalState NewState)

{

  if(NewState == ENABLE)

  {

    SCU->GPIOEMI = 0x01;

  }

  else

  {

    SCU->GPIOEMI = 0x00;

  }

}

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

* Function Name  : GPIO_ANAPinConfig

* Description    : Enables or disables pins from GPIO 4 in Analogue mode.

* Input          :- GPIO_ANAChannel: selects the ADC channel pin.

*                   This parameter can be one of the following values:

*                      GPIO_ANAChannel0

*                      GPIO_ANAChannel1

*                      GPIO_ANAChannel2

*                      GPIO_ANAChannel3

*                      GPIO_ANAChannel4

*                      GPIO_ANAChannel5

*                      GPIO_ANAChannel6

*                      GPIO_ANAChannel7

*                      GPIO_ANAChannelALL

*                 - NewState: new state of the port pin.

*                   This parameter can be: ENABLE or DISABLE.

* Output         : None

* Return         : None

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

void GPIO_ANAPinConfig(u8 GPIO_ANAChannel, FunctionalState NewState)

{

  if(NewState == ENABLE)

  {

     SCU->GPIOOUT[4] &= GPIO_GetAnaloClearBits(GPIO_ANAChannel);

     SCU->GPIOIN[4]  &= ~GPIO_ANAChannel;

     SCU->GPIOANA    |= GPIO_ANAChannel;

  }

  else

  {

    SCU->GPIOANA &= ~GPIO_ANAChannel;

  }

}

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

* Function Name  : GPIO_GetGPIONumber

* Description    : searche the GPIO number.

* Input          : GPIOx: where x can be (0..9) to select the GPIO peripheral.

* Output         : None

* Return         : GPIO number

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

u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx)

{

  if(GPIOx == GPIO1)

  {

    return  1;

  }

  if(GPIOx == GPIO2)

  {

    return  2;

  }

  if(GPIOx == GPIO3)

  {

    return  3;

  }

  if(GPIOx == GPIO4)

  {

    return  4;

  }

  if(GPIOx == GPIO5)

  {

    return  5;

  }

  if(GPIOx == GPIO6)

  {

    return  6;

  }

  if(GPIOx == GPIO7)

  {

    return  7;

  }

  if(GPIOx == GPIO8)

  {

    return  8;

  }

  if(GPIOx == GPIO9)

  {

    return  9;

  }

  return 0;

}

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

* Function Name  : GPIO_GetAnaloClearBits

* Description    : Clear the corresponding bits in the SCU_OUT register.

* Input          : GPIO_ANAChannel: selects the ADC channel pin.

*                   This parameter can be one of the following values:

*                      GPIO_ANAChannel0

*                      GPIO_ANAChannel1

*                      GPIO_ANAChannel2

*                      GPIO_ANAChannel3

*                      GPIO_ANAChannel4

*                      GPIO_ANAChannel5

*                      GPIO_ANAChannel6

*                      GPIO_ANAChannel7

*                      GPIO_ANAChannelALL

* Output         : None

* Return         : reset value in SCU_OUT register

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

u16 GPIO_GetAnaloClearBits(u8 GPIO_ANAChannel)

{

  if(GPIO_ANAChannel == GPIO_ANAChannel0)

  {

    return 0xFFFC;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel1)

  {

    return 0xFFF3;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel2)

  {

    return 0xFFCF;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel3)

  {

    return 0xFF3F;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel4)

  {

    return 0xFCFF;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel5)

  {

    return 0xF3FF;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel6)

  {

    return 0xCFFF;

  }

  if(GPIO_ANAChannel == GPIO_ANAChannel7)

  {

    return 0x3FFF;

  }

  /*Default vaule: return GPIO_ANAChannelALL*/

  return 0x0000;

}

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/