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Richard Barry
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
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* File Name : 75x_gpio.c
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* Author : MCD Application Team
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* Date First Issued : 03/10/2006
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* Description : This file provides all the GPIO software functions.
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********************************************************************************
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* History:
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* 07/17/2006 : V1.0
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* 03/10/2006 : V0.1
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********************************************************************************
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* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "75x_gpio.h"
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#include "75x_mrcc.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define GPIO_Remap_Mask 0x1F /* GPIO remapping mask */
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#define GPIO_Pin_Mask 0x000FFFFF /* GPIO1 and GPIO2 all pins mask */
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : GPIO_DeInit
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* Description : Deinitializes the GPIOx peripheral registers to their default
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* reset values.
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* The I/O remapping register 0 and 1 are not reset by this function.
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* Input : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_DeInit(GPIO_TypeDef* GPIOx)
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{
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/* Reset the GPIOx registers values */
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GPIOx->PC0 = 0xFFFFFFFF;
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GPIOx->PC1 = 0x0;
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GPIOx->PC2 = 0x0;
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GPIOx->PM = 0x0;
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}
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/*******************************************************************************
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* Function Name : GPIO_Init
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* Description : Initializes the GPIOx peripheral according to the specified
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* parameters in the GPIO_InitStruct. This function will not
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* change the configuration for a pin if the corresponding mask
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* bit is set, except pins configured as input pull-up or pull-down.
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* These pins are automatically masked after each configuration.
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* Input :- GPIOx: where x can be (0..2) to select the GPIO peripheral.
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* - GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
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* contains the configuration information for the specified GPIO
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* peripheral.
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
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{
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/* GPIOx Mode and Pins Set */
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if((GPIOx != GPIO0) && (GPIO_InitStruct->GPIO_Pin == GPIO_Pin_All))
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{
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GPIO_InitStruct->GPIO_Pin = GPIO_Pin_Mask;
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}
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switch(GPIO_InitStruct->GPIO_Mode)
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{
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case GPIO_Mode_AIN:
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GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_IN_FLOATING:
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GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_IPD:
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GPIOx->PM &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PD &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PM |= GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_IPU:
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GPIOx->PM &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PD |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PM |= GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_Out_OD:
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GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_Out_PP:
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GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_AF_OD:
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GPIOx->PD |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC0 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin;
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break;
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case GPIO_Mode_AF_PP:
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GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 |= GPIO_InitStruct->GPIO_Pin;
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break;
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default :
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GPIOx->PC0 |= GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC1 &= ~GPIO_InitStruct->GPIO_Pin;
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GPIOx->PC2 &= ~GPIO_InitStruct->GPIO_Pin;
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break;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_StructInit
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* Description : Fills each GPIO_InitStruct member with its default value.
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* Input : GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure
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* which will be initialized.
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct)
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{
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/* Reset GPIO init structure parameters values */
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GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
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GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN_FLOATING;
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}
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/*******************************************************************************
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* Function Name : GPIO_Read
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* Description : Reads the specified GPIO data port.
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* Input : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.
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* Output : None
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* Return : GPIO data port word value.
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*******************************************************************************/
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u32 GPIO_Read(GPIO_TypeDef* GPIOx)
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{
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return GPIOx->PD;
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}
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/*******************************************************************************
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* Function Name : GPIO_ReadBit
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* Description : Reads the specified data port bit.
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* Input : - GPIOx: where x can be (0..2) to select the GPIO peripheral.
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* : - GPIO_Pin: specifies the port bit to read.
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* This parameter can be GPIO_Pin_x where x can be (0..31) for
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* GPIO0 and x(0..19) for GPIO1 and GPIO2.
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* Output : None
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* Return : The port pin value
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*******************************************************************************/
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u8 GPIO_ReadBit(GPIO_TypeDef* GPIOx, u32 GPIO_Pin)
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{
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if ((GPIOx->PD & GPIO_Pin) != Bit_RESET)
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{
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return Bit_SET;
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}
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else
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{
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return Bit_RESET;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_Write
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* Description : Writes data to the specified GPIO data port.
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* Input :- GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.
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* - PortVal: specifies the value to be written to the data port
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* register.
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_Write(GPIO_TypeDef* GPIOx, u32 PortVal)
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{
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GPIOx->PD = PortVal;
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}
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/*******************************************************************************
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* Function Name : GPIO_WriteBit
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* Description : Sets or clears the selected data port bit.
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* Input : - GPIOx: where x can be (0..2) to select the GPIO peripheral.
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* - GPIO_Pin: specifies the port bit to be written.
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* This parameter can be GPIO_Pin_x where x can be (0..31) for
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* GPIO0 and x(0..19) for GPIO1 and GPIO2.
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* - BitVal: specifies the value to be written to the selected bit.
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* This parameter must be one of the BitAction enum values:
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* - Bit_RESET: to clear the port pin
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* - Bit_SET: to set the port pin
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_WriteBit(GPIO_TypeDef* GPIOx, u32 GPIO_Pin, BitAction BitVal)
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{
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if(BitVal != Bit_RESET)
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{
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GPIOx->PD |= GPIO_Pin;
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}
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else
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{
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GPIOx->PD &= ~GPIO_Pin;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_PinMaskConfig
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* Description : Enables or disables write protection to the selected bits in
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* the I/O port registers (PxC2, PxC1, PxC0 and PxD).
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* Input :- GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.
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* - GPIO_Pin: specifies the port bit to be protected.
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* This parameter can be GPIO_Pin_x where x can be (0..31) for
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* GPIO0 and x(0..19) for GPIO1 and GPIO2.
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* - NewState: new state of the port pin.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_PinMaskConfig(GPIO_TypeDef* GPIOx, u32 GPIO_Pin, FunctionalState NewState)
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{
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if(NewState == ENABLE)
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{
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GPIOx->PM |= GPIO_Pin;
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}
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else
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{
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GPIOx->PM &= ~GPIO_Pin;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_GetPortMask
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* Description : Gets the GPIOx port mask value.
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* Input : GPIOx: where x can be 0,1 or 2 to select the GPIO peripheral.
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* Output : None
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* Return : GPIO port mask value.
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*******************************************************************************/
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u32 GPIO_GetPortMask(GPIO_TypeDef* GPIOx)
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{
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return GPIOx->PM;
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}
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/*******************************************************************************
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* Function Name : GPIO_PinRemapConfig
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* Description : Changes the mapping of the specified pin.
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* Input :- GPIO_Remap: selects the pin to remap.
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* This parameter can be one of the following values:
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* - GPIO_Remap_SMI_CS3_EN: Enable SMI CS3
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* - GPIO_Remap_SMI_CS2_EN: Enable SMI CS2
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* - GPIO_Remap_SMI_CS1_EN: Enable SMI CS1
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* - GPIO_Remap_SMI_EN: Enable SMI Alternate Functions:
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* SMI_CS0, SMI_CK, SMI_DIN and SMI_DOUT
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* - GPIO_Remap_DBGOFF: JTAG Disable
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* - GPIO_Remap_UART1: UART1 Alternate Function mapping
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* - GPIO_Remap_UART2: UART2 Alternate Function mapping
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* - GPIO_Remap_SSP1: SSP1 Alternate Function mapping
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* - GPIO_Remap_TIM2: TIM2 Alternate Function mapping
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* - GPIO_Remap_TIM0: TIM0 Alternate Function mapping
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* - NewState: new state of the port pin.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_PinRemapConfig(u16 GPIO_Remap, FunctionalState NewState)
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{
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u32 GPIOReg = 0;
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u32 PinPos = 0;
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/* Get the GPIO register index */
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GPIOReg = GPIO_Remap >> 5;
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/* Get the pin position */
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PinPos = GPIO_Remap & GPIO_Remap_Mask;
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if(GPIOReg == 1) /* The pin to remap is in REMAP0R register */
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{
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if(NewState == ENABLE)
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{
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GPIOREMAP->REMAP0R |= (1 << PinPos);
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}
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else
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{
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GPIOREMAP->REMAP0R &= ~(1 << PinPos);
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}
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}
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else if(GPIOReg == 2) /* The pin to remap is in REMAP1R register */
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{
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if(NewState == ENABLE)
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{
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GPIOREMAP->REMAP1R |= (1 << PinPos);
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}
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else
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{
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GPIOREMAP->REMAP1R &= ~(1 << PinPos);
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}
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}
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}
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/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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