blob: dcc7d792094ff76a8c1c622a468f10a834aa5ac7 [file] [log] [blame]
/******************** (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****/