ledcon.c

来自「LED blink for lpc2114」· C语言 代码 · 共 49 行

/**********************************************************************
 ** Program Name : LED BLINK                                         **
 ** Compiler     : Keil                                				 **
 ** Board        : MiniARM                                       	 **
 ** Firm         : UC Micro Systems                                  **
 ** Website      : www.ucmicrosys.com                                **
 **                                                                  **
 ** Description  : This program blinks LED4 connected to P0.25       **
 **                Connect LED power jumper before running this      **
 **                program.                                          **
 **                                                                  **
 *********************************************************************/
 
#include  "lpc21xx.h"

#define	  LEDCON	0x02000000		/* P0.25 */


/****************************************************************************
* DelayNS()
****************************************************************************/
void  DelayNS(unsigned int  dly)
{  unsigned int  i;

   for(; dly>0; dly--) 
      for(i=0; i<50000; i++);
}
                               


/****************************************************************************
*main()
****************************************************************************/
int  main(void)
{  PINSEL0 = 0x00000000;		// Enable GPIO
   PINSEL1 = 0x00000000;
   
   IO0DIR = LEDCON;				// Enable LED4 Direction
      while(1)	
   {  IO0SET = LEDCON;
      DelayNS(30);
      IO0CLR = LEDCON;
      DelayNS(30);
   }
   
   return(0);
}