main.c

arm gpio 口 调试程序 。 arm7 2103 初学者很有用。

/****************************************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:        发光二极管闪烁控制实验
**
*********************************************************************************************************/
#include "config.h"

# define    LED1    1 << 17                                             /*  P0.17控制LED1               */

/*********************************************************************************************************
** 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 & (~(0x03 << 2));                                 /*  将P0.17设置为GPIO           */
    IO0DIR  = LED1;                                                     /*  设置LED控制口为输出         */
    IO0SET  = LED1;                                                     /*  LED1熄灭                    */
    
    while (1) {
        IO0SET = LED1;                                                  /*  LED1熄灭                    */
        DelayNS(50);                                                    /*  延时                        */
        IO0CLR = LED1;                                                  /*  LED1点亮                    */
        DelayNS(50);                                                    /*  延时                        */
    }
    
    return 0;
}
/*********************************************************************************************************
**                            End Of File
**********************************************************************************************************/