gpio.c

来自「ST ARM STR7系列在应用编程示例.采用串口下载.可供参考」· C语言 代码 · 共 85 行

/******************** (C) COPYRIGHT 2004 STMicroelectronics ********************
* File Name          : gpio.c
* Author             : MCD Application Team
* Date First Issued  : 08/06/2003
* Description        : This file provides all the GPIO software functions
********************************************************************************
* History:
*  08/06/2003 : Created
*  11/24/2004 : IAP Version 1.0
********************************************************************************
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.
********************************************************************************/

#include "gpio.h"

/*******************************************************************************
* 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)
{
  switch (GPIO_Mode)
  {
    case GPIO_HI_AIN_TRI:
      GPIOx->PC0&=~Port_Pins;
      GPIOx->PC1&=~Port_Pins;
      GPIOx->PC2&=~Port_Pins;
      break;

    case GPIO_IN_TRI_TTL:
      GPIOx->PC0|=Port_Pins;
      GPIOx->PC1&=~Port_Pins;
      GPIOx->PC2&=~Port_Pins;
      break;

    case GPIO_IN_TRI_CMOS:
      GPIOx->PC0&=~Port_Pins;
      GPIOx->PC1|=Port_Pins;
      GPIOx->PC2&=~Port_Pins;
      break;

    case GPIO_INOUT_WP:
      GPIOx->PC0|=Port_Pins;
      GPIOx->PC1|=Port_Pins;
      GPIOx->PC2&=~Port_Pins;
      break;

    case GPIO_OUT_OD:
      GPIOx->PC0&=~Port_Pins;
      GPIOx->PC1&=~Port_Pins;
      GPIOx->PC2|=Port_Pins;
      break;

    case GPIO_OUT_PP:
      GPIOx->PC0|=Port_Pins;
      GPIOx->PC1&=~Port_Pins;
      GPIOx->PC2|=Port_Pins;
      break;

    case GPIO_AF_OD:
      GPIOx->PC0&=~Port_Pins;
      GPIOx->PC1|=Port_Pins;
      GPIOx->PC2|=Port_Pins;
      break;

    case GPIO_AF_PP:
      GPIOx->PC0|=Port_Pins;
      GPIOx->PC1|=Port_Pins;
      GPIOx->PC2|=Port_Pins;
      break;
  }
}

/******************* (C) COPYRIGHT 2004 STMicroelectronics *****END OF FILE****/