gpio.c

realview下的一个arm9的bootloader烧录器.支持norflash读写

/*******************************************************************************
 * Copyright Statement:
 * --------------------
 * This software is protected by Copyright and the information contained herein
 * is confidential.  The software may not be copied and the information
 * contained herein may not be used or disclosed except with the written
 * permission of INFOMAX COMMUNICATION CO.,LTD.
 *
 * MODULE NAME: GPIO
 * DESCRIPTION: GPIO API
 * AUTHOR:      Bo-Hung Wu
 * BEGIN DATE:  Oct. 19, 2007       
 * LAST MODIFICATION: 
 *****************************************************************************/

/******************************************************************************* 
 Include/header files
 *******************************************************************************/
#include "gpio.h"  

/******************************************************************************* 
 Constant/Marco
*******************************************************************************/


/******************************************************************************* 
 Structure/Union/Enum/Typedef 
 *******************************************************************************/


/******************************************************************************* 
 Local function prototype
 *******************************************************************************/
int gpio_query_fast(int GPIO_id);

/******************************************************************************* 
 Global/Local variables
 *******************************************************************************/


/******************************************************************************* 
 Function implementation 
 *******************************************************************************/

/**
 @Desc
    Description for function_name
 @Param parameter 1
    Put parameter 1 description here
 @Param parameter 2
    Put parameter 2 description here
 @Return    Return value 1 and it description 
 @Return    Return value 1 and it description 
*/

int gpio_query_fast(int GPIO_id)
{
    int ret_val = 0; //Assume NOT fast by default 
    if( (GPIO_id >= FAST_GPIO_START) && (GPIO_id <= FAST_GPIO_END) )
    {
        ret_val = 1;
    }
    
    return ret_val;
}

void led_on(int led_no)
{
    if( gpio_query_fast(led_no) != 1)
        *GPIO_DIO_REG &= ~(1 << led_no);
    else 
        *FGPIO_DIO_REG &= ~(1 << led_no);
}

void led_off(int led_no)
{
    if( gpio_query_fast(led_no) != 1)
        *GPIO_DIO_REG |= (1 << led_no);
    else         
        *FGPIO_DIO_REG |= (1 << led_no);
}

void toggle_led(int led_no)
{
    if( gpio_query_fast(led_no) != 1)
        *GPIO_DIO_REG ^= (1 << led_no);
    else 
        *FGPIO_DIO_REG ^= (1 << led_no);
}


void gpio_init_func(UINT32 gpio_func_reg_val)
{
    *GPIO_FUN_REG  = gpio_func_reg_val;
    *FGPIO_FUN_REG = gpio_func_reg_val;
}


void gpio_write_io(UINT32 gpio_io_reg_val)
{
    *GPIO_DIO_REG  = gpio_io_reg_val;
    *FGPIO_DIO_REG = gpio_io_reg_val;
}