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jeremybenn |
/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
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* File Name : gpio.c
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* Author : MCD Application Team
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* Date First Issued : 06/08/2003
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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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* 30/11/2004 : V2.0
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* 14/07/2004 : V1.3
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* 01/01/2004 : V1.2
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*******************************************************************************
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THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
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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, INDIRECT
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OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
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CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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#include "gpio.h"
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/*******************************************************************************
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* Function Name : GPIO_Config
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* Description : Configure the GPIO port pins
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* Input 1 : GPIOx (x can be 0,1 or 2) the desired port
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* Input 2 : Port_Pins : pins placements
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* Input 3 : Pins Mode
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_Config (GPIO_TypeDef *GPIOx, u16 Port_Pins, GpioPinMode_TypeDef GPIO_Mode)
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{
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switch (GPIO_Mode)
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{
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case GPIO_HI_AIN_TRI:
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GPIOx->PC0&=~Port_Pins;
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GPIOx->PC1&=~Port_Pins;
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GPIOx->PC2&=~Port_Pins;
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break;
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case GPIO_IN_TRI_TTL:
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GPIOx->PC0|=Port_Pins;
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GPIOx->PC1&=~Port_Pins;
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GPIOx->PC2&=~Port_Pins;
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break;
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case GPIO_IN_TRI_CMOS:
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GPIOx->PC0&=~Port_Pins;
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GPIOx->PC1|=Port_Pins;
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GPIOx->PC2&=~Port_Pins;
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break;
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case GPIO_IPUPD_WP:
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GPIOx->PC0|=Port_Pins;
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GPIOx->PC1|=Port_Pins;
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GPIOx->PC2&=~Port_Pins;
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break;
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case GPIO_OUT_OD:
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GPIOx->PC0&=~Port_Pins;
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GPIOx->PC1&=~Port_Pins;
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GPIOx->PC2|=Port_Pins;
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break;
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case GPIO_OUT_PP:
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GPIOx->PC0|=Port_Pins;
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GPIOx->PC1&=~Port_Pins;
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GPIOx->PC2|=Port_Pins;
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break;
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case GPIO_AF_OD:
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GPIOx->PC0&=~Port_Pins;
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GPIOx->PC1|=Port_Pins;
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GPIOx->PC2|=Port_Pins;
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break;
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case GPIO_AF_PP:
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GPIOx->PC0|=Port_Pins;
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GPIOx->PC1|=Port_Pins;
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GPIOx->PC2|=Port_Pins;
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break;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_BitWrite
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* Description : Set or reset the selected port pin
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* Input 1 : Selected GPIO port
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* Input 2 : Pin number
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* Input 3 : bit value
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_BitWrite(GPIO_TypeDef *GPIOx, u8 Port_Pin, u8 Port_Val)
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{
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if (Port_Val&0x01) GPIOx->PD |= 1<<Port_Pin; else GPIOx->PD &= ~(1<<Port_Pin);
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}
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/*******************************************************************************
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* Function Name : GPIO_ByteWrite
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* Description : Write byte value to the selected PD register
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* Input 1 : Selected GPIO port
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* Input 2 : GPIO_MSB or GPIO_LSB
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* Input 3 : Byte value
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* Output : None
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* Return : None
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*******************************************************************************/
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void GPIO_ByteWrite(GPIO_TypeDef *GPIOx, u8 Port_Byte, u8 Port_Val)
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{
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GPIOx->PD = Port_Byte ? (GPIOx->PD&0x00FF) | ((u16)Port_Val<<8)
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: (GPIOx->PD&0xFF00) | Port_Val;
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}
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/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/
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