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Richard Barry 2012-08-11 21:34:11 +00:00
parent 7bd5f21ad5
commit f508a5f653
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FreeRTOS/Demo/ARM7_STR71x_IAR/Library/gpio.c Normal file
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/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
* File Name : gpio.c
* Author : MCD Application Team
* Date First Issued : 06/08/2003
* Description : This file provides all the GPIO software functions
********************************************************************************
* History:
* 30/11/2004 : V2.0
* 14/07/2004 : V1.3
* 01/01/2004 : V1.2
*******************************************************************************
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_IPUPD_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;
}
}
/*******************************************************************************
* 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)
{
if (Port_Val&0x01) GPIOx->PD |= 1<<Port_Pin; else GPIOx->PD &= ~(1<<Port_Pin);
}
/*******************************************************************************
* 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)
{
GPIOx->PD = Port_Byte ? (GPIOx->PD&0x00FF) | ((u16)Port_Val<<8)
: (GPIOx->PD&0xFF00) | Port_Val;
}
/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/