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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****/