main.c

easyarm 的主要程序

/****************************************Copyright (c)***************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info--------------------------------------------------------------------------------
** File name:			main.c
** Last modified Date:  2008-02-26
** Last Version:		1.0
** Descriptions:		The main() function example template
**
**-------------------------------------------------------------------------------------------------------
** Created by:			Chen Mingji
** Created date:		2008-02-26
** Version:				1.0
** Descriptions:		The original version
**
**-------------------------------------------------------------------------------------------------------
** Modified by:         Li Baihua
** Modified date:       2008-04-02
** Version:             1.1
** Descriptions:        发光二极管闪烁高速GPIO实验
**
*********************************************************************************************************/
#include "config.h"

# define    LED1    1 << 17                                             /*  P0.17控制LED1               */
# define    LED2    1 << 18                                             /*  P0.18控制LED2               */
# define    LED3    1 << 19                                             /*  P0.19控制LED3               */
# define    LED4    1 << 20                                             /*  P0.20控制LED4               */

/*********************************************************************************************************
** Function name:		DelayNS
** Descriptions:		延时函数
** input parameters:    uiDly   值越大，延时时间越长
** output parameters:   无
** Returned value:      无
*********************************************************************************************************/
void DelayNS (uint32 uiDly)
{
    uint32 i;
    
    for (; uiDly > 0; uiDly--){
        for(i = 0; i < 50000; i++);
    }
}

/*********************************************************************************************************
** Function name:		main
** Descriptions:		跳线JP4短接，LED1闪烁
** input parameters:    无
** output parameters:   无
** Returned value:      无
*********************************************************************************************************/
int main (void)
{
    PINSEL1 = PINSEL1 & (~(0xFF << 2));                                 /*  将P0.17-P0.20设置为GPIO     */
    SCS     = 0x01;                                                     /*  设定为高速GPIO模式          */
    FIO0DIR = LED1 | LED2 | LED3 | LED4;                                /*  设置LED控制口为输出         */
    FIO0SET = LED1 | LED2 | LED3 | LED4;                                /*  LED1熄灭                    */
    
    while (1) {
        FIO0SET = LED1 | LED3;                                          /*  LED1、LED3熄灭              */
        FIO0CLR = LED2 | LED4;                                          /*  LED2、LED4点亮              */
        DelayNS(50);                                                    /*  延时                        */
        FIO0CLR = LED1 | LED3;                                          /*  LED1、LED3点亮              */
        FIO0SET = LED2 | LED4;                                          /*  LED2、LED4熄灭              */
        DelayNS(50);                                                    /*  延时                        */
    }
    
    return 0;
}
/*********************************************************************************************************
**                            End Of File
**********************************************************************************************************/