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408 lines
13 KiB
C
408 lines
13 KiB
C
19 years ago
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
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* File Name : 91x_gpio.c
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* Author : MCD Application Team
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* Date First Issued : 05/18/2006 : Version 1.0
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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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* 05/24/2006 : Version 1.1
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* 05/18/2006 : Version 1.0
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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 "91x_gpio.h"
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#include "91x_scu.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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static u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx);
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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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* Input : GPIOx: where x can be (0..9) 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 GPIO registers values */
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if(GPIOx == GPIO0)
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{
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SCU_APBPeriphReset(__GPIO0,ENABLE);
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SCU_APBPeriphReset(__GPIO0,DISABLE);
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SCU->GPIOTYPE[0x00] = 0x0000 ;
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SCU->GPIOOUT[0x00] = 0x0000;
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SCU->GPIOIN[0x00] = 0x0000;
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}
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if(GPIOx == GPIO1)
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{
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SCU_APBPeriphReset(__GPIO1,ENABLE);
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SCU_APBPeriphReset(__GPIO1,DISABLE);
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SCU->GPIOTYPE[0x01] = 0x0000 ;
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SCU->GPIOOUT[0x01] = 0x0000;
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SCU->GPIOIN[0x01] = 0x0000;
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}
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if(GPIOx == GPIO2)
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{
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SCU_APBPeriphReset(__GPIO2,ENABLE);
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SCU_APBPeriphReset(__GPIO2,DISABLE);
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SCU->GPIOTYPE[0x02] = 0x0000 ;
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SCU->GPIOOUT[0x02] = 0x0000;
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SCU->GPIOIN[0x02] = 0x0000;
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}
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if(GPIOx == GPIO3)
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{
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SCU_APBPeriphReset(__GPIO3,ENABLE);
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SCU_APBPeriphReset(__GPIO3,DISABLE);
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SCU->GPIOTYPE[0x03] = 0x0000 ;
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SCU->GPIOOUT[0x03] = 0x0000;
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SCU->GPIOIN[0x03] = 0x0000;
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}
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if(GPIOx == GPIO4)
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{
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SCU_APBPeriphReset(__GPIO4,ENABLE);
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SCU_APBPeriphReset(__GPIO4,DISABLE);
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SCU->GPIOTYPE[0x04] = 0x0000 ;
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SCU->GPIOOUT[0x04] = 0x0000;
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SCU->GPIOIN[0x04] = 0x0000;
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SCU->GPIOANA = 0x00;
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}
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if(GPIOx == GPIO5)
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{
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SCU_APBPeriphReset(__GPIO5,ENABLE);
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SCU_APBPeriphReset(__GPIO5,DISABLE);
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SCU->GPIOTYPE[0x05] = 0x0000 ;
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SCU->GPIOOUT[0x05] = 0x0000;
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SCU->GPIOIN[0x05] = 0x0000;
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}
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if(GPIOx == GPIO6)
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{
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SCU_APBPeriphReset(__GPIO6,ENABLE);
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SCU_APBPeriphReset(__GPIO6,DISABLE);
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SCU->GPIOTYPE[0x06] = 0x0000 ;
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SCU->GPIOOUT[0x06] = 0x0000;
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SCU->GPIOIN[0x06] = 0x0000;
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}
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if(GPIOx == GPIO7)
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{
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SCU_APBPeriphReset(__GPIO7,ENABLE);
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SCU_APBPeriphReset(__GPIO7,DISABLE);
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SCU->GPIOOUT[0x07] = 0xAAAA;
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SCU->GPIOOUT[0x07] = 0x0000;
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SCU->GPIOIN[0x07] = 0x0000;
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}
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if(GPIOx == GPIO8)
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{
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SCU_APBPeriphReset(__GPIO8,ENABLE);
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SCU_APBPeriphReset(__GPIO8,DISABLE);
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SCU->GPIOEMI = 0x00;
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}
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if(GPIOx == GPIO9)
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{
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SCU_APBPeriphReset(__GPIO9,ENABLE);
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SCU_APBPeriphReset(__GPIO9,DISABLE);
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SCU->GPIOEMI = 0x00;
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}
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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 .
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* Input :- GPIOx: where x can be (0..9) 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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/* Select pin direction */
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u8 PinNumber = 0;
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u8 Counter = 0;
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u8 GPIO_Number = 0;
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GPIO_Number = GPIO_GetGPIONumber(GPIOx);
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if(GPIO_InitStruct->GPIO_Direction == GPIO_PinOutput)
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{
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GPIOx->DDR |= GPIO_InitStruct->GPIO_Pin;
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}
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else
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{
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GPIOx->DDR &= ~GPIO_InitStruct->GPIO_Pin;
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}
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for (Counter = 0; Counter < 8;Counter++)
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{
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/*Search pin number*/
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PinNumber = (GPIO_InitStruct->GPIO_Pin & (1 <<Counter));
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if((PinNumber >> Counter) == 1)
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{
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/*Output ALternate 0*/
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SCU->GPIOOUT[GPIO_Number] &= ~(0x3 <<(Counter *2));
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if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt1)
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{
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/*Output ALternate 1*/
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SCU->GPIOOUT[GPIO_Number] |= 1 << (Counter *2);
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}
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if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt2)
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{
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/*Output ALternate 2*/
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SCU->GPIOOUT[GPIO_Number] |= 0x2 << (Counter *2);
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}
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if(GPIO_InitStruct->GPIO_Alternate == GPIO_OutputAlt3)
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{
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/*Output ALternate 3*/
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SCU->GPIOOUT[GPIO_Number] |= 0x3 << (Counter *2);
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}
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/*Type configuration: PushPull or Open Collector*/
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SCU->GPIOTYPE[GPIO_Number] &= ~(0x1 << Counter) ;
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if(GPIO_InitStruct->GPIO_Type == GPIO_Type_OpenCollector)
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{
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/*Open Drain configuration*/
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SCU->GPIOTYPE[GPIO_Number] |= 0x1 << Counter;
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}
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/*IP Connected disable*/
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SCU->GPIOIN[GPIO_Number] &= ~(0x1 << Counter) ;
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if(GPIO_InitStruct->GPIO_IPConnected == GPIO_IPConnected_Enable)
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{
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/*IP Connected enable*/
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SCU->GPIOIN[GPIO_Number] |= 0x1 << Counter;
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}
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}
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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 : Initialize the GPIO Init Structure parameters
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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_Direction = GPIO_PinInput;
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GPIO_InitStruct->GPIO_Type = GPIO_Type_PushPull;
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GPIO_InitStruct->GPIO_IPConnected = GPIO_IPConnected_Disable;
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GPIO_InitStruct->GPIO_Alternate = GPIO_InputAlt1;
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}
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/*******************************************************************************
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* Function Name : GPIO_ReadBit
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* Description : Reads the specified port pin
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* Input : - GPIOx: where x can be (0..9) to select the GPIO peripheral.
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* : - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x
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* where x can be (0..7).
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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, u8 GPIO_Pin)
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{
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if ((((GPIOx->DR[GPIO_Pin<<2])) & 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_Read
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* Description : Reads the specified GPIO data port
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* Input : - GPIOx: where x can be (0..9) 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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u8 GPIO_Read(GPIO_TypeDef* GPIOx)
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{
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return (GPIOx->DR[0x3FC]);
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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..9) to select the GPIO peripheral.
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* - GPIO_Pin: the Pin number. This parameter can be GPIO_Pin_x
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* where x can be (0..7).
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* - BitVal: this parameter specifies the value to be written
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* to the selected bit.
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* BitVal 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, u8 GPIO_Pin, BitAction BitVal)
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{
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if(BitVal == Bit_SET)
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{
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GPIOx->DR[GPIO_Pin <<2] = GPIO_Pin;
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}
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else
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{
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GPIOx->DR[GPIO_Pin <<2] = 0x00;
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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 the passed value in the selected data GPIOx port
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* register.
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* Input :- GPIOx: where x can be (0..9) to select the GPIO peripheral.
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* - PortVal: the value to be written to the data port 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, u8 PortVal)
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{
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GPIOx->DR[0x3FC] = PortVal;
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}
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/*******************************************************************************
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* Function Name : GPIO_EMIConfig
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* Description : Enables or disables GPIO 8 and 9 in EMI mode.
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* Input : - NewState: new state of the EMI.
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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_EMIConfig(FunctionalState NewState)
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{
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if(NewState == ENABLE)
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{
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SCU->GPIOEMI = 0x01;
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}
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else
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{
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SCU->GPIOEMI = 0x00;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_ANAPinConfig
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* Description : Enables or disables pins from GPIO 4 in Analogue mode.
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* Input :- GPIO_ANAChannel: selects the ADC channel pin.
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* This parameter can be one of the following values:
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* GPIO_ANAChannel0
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* GPIO_ANAChannel1
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* GPIO_ANAChannel2
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* GPIO_ANAChannel3
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* GPIO_ANAChannel4
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* GPIO_ANAChannel5
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* GPIO_ANAChannel6
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* GPIO_ANAChannel7
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* GPIO_ANAChannelALL
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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_ANAPinConfig(u8 GPIO_ANAChannel, FunctionalState NewState)
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{
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if(NewState == ENABLE)
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{
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if(GPIO_ANAChannel == GPIO_ANAChannelALL)
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{
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SCU->GPIOOUT[4] = 0x0000;
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SCU->GPIOIN[4] = 0x00;
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}
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else
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{
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SCU->GPIOOUT[4] &= ~(0x3<<(GPIO_ANAChannel-1));
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SCU->GPIOIN[4] &= ~GPIO_ANAChannel;
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}
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SCU->GPIOANA |= GPIO_ANAChannel;
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}
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else
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{
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SCU->GPIOANA &= ~GPIO_ANAChannel;
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}
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}
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/*******************************************************************************
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* Function Name : GPIO_GetGPIONumber
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* Description : searche the GPIO number.
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* Input : GPIOx: where x can be (0..9) to select the GPIO peripheral.
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* Output : None
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* Return : GPIO number
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*******************************************************************************/
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u8 GPIO_GetGPIONumber(GPIO_TypeDef* GPIOx)
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{
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if(GPIOx == GPIO1)
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{
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return 1;
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}
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if(GPIOx == GPIO2)
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{
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO3)
|
||
|
|
{
|
||
|
|
return 3;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO4)
|
||
|
|
{
|
||
|
|
return 4;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO5)
|
||
|
|
{
|
||
|
|
return 5;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO6)
|
||
|
|
{
|
||
|
|
return 6;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO7)
|
||
|
|
{
|
||
|
|
return 7;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO8)
|
||
|
|
{
|
||
|
|
return 8;
|
||
|
|
}
|
||
|
|
if(GPIOx == GPIO9)
|
||
|
|
{
|
||
|
|
return 9;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
/******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
|