gpio.h

The aim of this application note is to show to scan the 4x4 matrix keypad multiplexed with a four

/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
* File Name          : gpio.h
* Author             : MCD Application Team
* Date First Issued  : 14/09/2003
* Description        : This file contains all the functions prototypes for the
*                      GPIO software library.
********************************************************************************
* History:
*  20/12/2004 : V1.2
*  14/09/2003 : created
*******************************************************************************
 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.
*******************************************************************************/
#ifndef __gpio_H
#define __gpio_H

#include "71x_lib.h"

typedef enum
{
  GPIO_HI_AIN_TRI,
  GPIO_IN_TRI_TTL,
  GPIO_IN_TRI_CMOS,
  GPIO_IPUPD_WP,
  GPIO_OUT_OD,
  GPIO_OUT_PP,
  GPIO_AF_OD,
  GPIO_AF_PP
} GpioPinMode_TypeDef;

#define GPIO_LSB  0x00
#define GPIO_MSB  0x08

/*******************************************************************************
* Function Name  : GPIO_Config
* Description    : Configure the GPIO port pins
* Input 1        : GPIOx (x can be 0,1 or 2) the desired port
* Input 2        : Port_Pins : pins placements
* Input 3        : Pins Mode
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_Config (GPIO_TypeDef *GPIOx, u16 Port_Pins, GpioPinMode_TypeDef GPIO_Mode);

/*******************************************************************************
* Function Name  : GPIO_Read
* Description    : Read the desired port pin value
* Input 1        : Selected GPIO port
* Input 2        : Pin number
* Output         : None
* Return         : The selected pin value
*******************************************************************************/
inline u8 GPIO_BitRead(GPIO_TypeDef *GPIOx, u8 Port_Pin)
{
  return (GPIOx->PD >> Port_Pin) & 0x0001;
}

/*******************************************************************************
* Function Name  : GPIO_ByteRead
* Description    : Read the desired port Byte value
* Input 1        : Selected GPIO port
* Input 2        : GPIO_MSB or GPIO_LSB
* Output         : None
* Return         : The GPIO_MSB or GPIO_LSB of the selected PD register
*******************************************************************************/
inline u8 GPIO_ByteRead(GPIO_TypeDef *GPIOx, u8 Port_Byte)
{
  return (u8)(GPIOx->PD >> Port_Byte);
}

/*******************************************************************************
* Function Name  : GPIO_WordRead
* Description    : Read the desired port word value
* Input 1        : Selected GPIO port
* Output         : None
* Return         : The selected PD register value
*******************************************************************************/
inline u16 GPIO_WordRead(GPIO_TypeDef *GPIOx)
{
  return GPIOx->PD;
}

/*******************************************************************************
* Function Name  : GPIO_BitWrite
* Description    : Set or reset the selected port pin
* Input 1        : Selected GPIO port
* Input 2        : Pin number
* Input 3        : bit value
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_BitWrite(GPIO_TypeDef *GPIOx, u8 Port_Pin, u8 Port_Val);

/*******************************************************************************
* Function Name  : GPIO_ByteWrite
* Description    : Write byte value to the selected PD register
* Input 1        : Selected GPIO port
* Input 2        : GPIO_MSB or GPIO_LSB
* Input 3        : Byte value
* Output         : None
* Return         : None
*******************************************************************************/
void GPIO_ByteWrite(GPIO_TypeDef *GPIOx, u8 Port_Byte, u8 Port_Val);

/*******************************************************************************
* Function Name  : GPIO_WordWrite
* Description    : Write word value to the selected PD register
* Input 1        : Selected GPIO port
* Input 2        : Value
* Output         : None
* Return         : None
*******************************************************************************/
inline void GPIO_WordWrite(GPIO_TypeDef *GPIOx, u16 Port_Val)
{
  GPIOx->PD = Port_Val;
}

#endif /* __gpio_H */

/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/