led.c

来自「ICETEK-LF2407-A板和教学实验箱使用说明书及开发板的所有实验例程」· C语言 代码 · 共 66 行

#include "2407c.h"                    
ioport unsigned int port8000;
ioport unsigned int port8005;
ioport unsigned int port8001;
ioport unsigned int port8002;
ioport unsigned int port8003;
ioport unsigned int port8004;
ioport unsigned int port8007;
#define CTRGR port8000
#define CTRLCDCMDR port8001
#define CTRKEY port8001
#define CTRLCDCR port8002
#define CTRCLKEY port8002
#define CTRLCDLCR  port8003
#define CTRLCDRCR port8004
#define CTRLA port8005
#define CTRLR port8007

void Delay(int nDelay);	/* 延时子程序 */

main()
{
	unsigned int uWork;

	*WDCR=0x6f;
	*WDKEY=0x5555;
	*WDKEY=0xaaaa;		/* 关闭看门狗 */

	*SCSR1=0x81fe;    	/* DSP运行频率40m */
	(*MCRB)=0;
	
	uWork=(*MCRC);      /*  将PWM12/IOPE6设置成通用I/O口 */
	uWork&=0x0ffbf;		
	(*MCRC)=uWork;
	CTRGR=0;		// 初始化ICETEK-CTR
    CTRGR=0x80;
    CTRGR=0;
    CTRLR=0;			// 关闭东西方向的交通灯
    CTRLR=0x40;	// 关闭南北方向的交通灯
    CTRGR=2;
	

	while ( 1 )
	{   
		uWork=(*PEDATDIR);	/* PWM12/IOPE6的控制寄存器 */
		uWork|=0x4000;		/* 输出 */
		uWork^=0x0040;		/* 输出状态 */
		(*PEDATDIR)=uWork;
		Delay(256);			/* 延时片刻 */
	}
}               

void Delay(int nDelay)
{
	int i,j;
	unsigned int k;
	
	for ( i=0;i<nDelay;i++ )
		for ( j=0;j<64;j++ )
			k++;
}