中科因仑“3+1”工程特种兵精英论坛
标题:
计数器
[打印本页]
作者:
张衍波
时间:
2015-4-8 13:31
标题:
计数器
#define MAIN_C
#include "includes.h"
/***************************************************/
/*T0工作于计数方式*/
/*计数脉冲从PB0(T0)脚输入*/
/***************************************************/
//数码管字形表
//数码管为公阴极
unsigned char table[10] =
{
0x3f, //0
0x06, //1
0x5b, //2
0x4f, //3
0x66, //4
0x6d, //5
0x7d, //6
0x07, //7
0x7f, //8
0x6f //9
};
void display(unsigned char *p)
{
unsigned char i;
unsigned sel = 0x08;
for(i=0;i<4;i++)
{
ConPort = ~sel;
OutPort = table[p
];
delay_nms(1);
sel = sel>>1;
}
}
void main(void)
{
unsigned char load;
InitIo();
PORTA = 0xff; //点亮测试所有数码管
PORTC = 0x00;
delay_nms(10);
PORTC = 0xff; //熄灭所有数码管
TCCR0 |= (1<<CS02)|(1<<CS01);//T/C0工作于计数方式,下降沿触发
TCNT0 = CNT; //计数初值
while(1)
{
load = TCNT0;
process(load,data);
display(data);
}
}
[attach]2129[/attach]
欢迎光临 中科因仑“3+1”工程特种兵精英论坛 (http://bbs.enlern.com/)
Powered by Discuz! X3.4