key.c

KEIL开发2148LED控制流水灯 可以选择快慢 暂停继续功能

#include <LPC213X.H>

/*============================================================
	LPC214X 按键功能演示
引脚分布
P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7
TX0	 RX0			CS1		  K4   K3

P0.8 P0.9 P0.10 P0.11 P0.12 P0.13 P0.14 P0.15
TX1	 RX1  RW 	SCL	  SDA	 K1	  VRST	K2

P0.16 P0.17 P0.18 P0.19 P0.20 P0.21 P0.22 P0.23
BEEP  SCK1	MISO  MOSI	SSEL  RS_COM RW	   VB
P0.24 P0.25 P0.26 P0.27 P0.28 P0.29 P0.30 P0.31
	  AOUT	D+	   D-	A_IN1 A_IN2	 CS2   ULED

LED引脚
L1---------L8
P1.16----P1.23
*/

#define KEY1 13
#define KEY2 15
#define KEY3 7
#define KEY4 14

#define cs244 12

#define KEY_MASK=(1<<KEY1)|(1<<KEY2)|(1<<KEY3)|(1<<KEY4)  //按键屏蔽码

#define Uchar unsigned char 

Uchar temp[24]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,
				0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,
				0x81,0x42,0x24,0x18,0x18,0x24,0x42,0x81,}; 

 void init_port(void)
 {

 //port initialized
 IODIR1=0x00FF0000;	 //将P1.16-P1.23设置成LED输出引脚
 IODIR0=0x40600010;	 //将P0.30 P0.22 P0.21 P0.4设置成输出引脚

 IODIR0 |=1<<cs244;
 IOCLR0 |=1<<cs244;
 }
void delay (unsigned int i) {                        /* Delay function */
unsigned int n;
while(i>1)
{
	for(n=65535;n>1;n--);
	i--;
}
}

int main(void)
{	unsigned char stop;
	unsigned char i;
	unsigned char delaytime;

	stop=0;
	delaytime=50;
	init_port();
	IOCLR1 = 0x00ff0000;		//熄灭8个LED
	while(1)
	{	
		for(i=0;i<24;i++)
		{	
		  if((IOPIN0 & (1 <<KEY3))==0)		//减速
		  {
		  	delaytime=delaytime+20;
		  }
		  if((IOPIN0 & (1 <<KEY4))==0)
		  {
		  	delaytime=delaytime-20;		  //加速
		  }
		  if((IOPIN0 & (1 <<KEY1))==0)	   //暂停
		  {	
		  	stop=0;
		  }
			while(stop==0)
			{ if((IOPIN0 & (1 <<KEY2))==0)	 //继续
		  {
		  	stop=1;
		  }

			}
		    IOSET1=temp[i]<<16;
			delay(delaytime);
			IOCLR1 = 0x00ff0000;
				}
	}	   			
}